#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <thread>
#include <atomic>
#include <chrono>
#include <mutex>
#include <map>
#include <set>
#include <array>
#include <algorithm>
#include <cstring>
#include <cctype>
#include <ctime>
#include <memory>
#include <sys/socket.h>
#include <sys/poll.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <fcntl.h>
#include <unistd.h>
#include <unistd.h>
#include <signal.h>
#include <cstdlib>
#include <opencv2/opencv.hpp>
#include "json.hpp"
#include "rtsp_capture.h"
#include "yolo_detector.h"
#include "rga_processor.h"
#include "fence_engine.h"
#include "relay_ctrl.h"
#include "web_server.h"
#include "alarm_history.h"
#include "config_loader.h"
#include "rfid_client.h"
#include "modbus_client.h"
#include "bucket_manager.h"
#include "idle_detector.h"
#include "pose_detector.h"
#include "display_output.h"

using namespace std;
using json = nlohmann::json;

static atomic<bool> g_running{true};
static void sigHandler(int sig) {
    // 第一次: 优雅退出; 第二次: 强制退出(防止清理流程卡死)
    if (!g_running.exchange(false)) {
        signal(sig, SIG_DFL);
        _exit(130);
    }
}

struct ChannelState {
    int id;
    shared_ptr<RtspCapture> capture;
    RgaProcessor rga;
    vector<Detection> detections;
    vector<FenceEvent> events;
    vector<float> rgb_buf;
    vector<PersonPose> poses;              // 姿态识别结果
    vector<PersonPose> fall_poses;         // 判定为跌倒/异常姿态的人员
    bool pose_running = false;             // 本通道姿态推理开关
    int pose_fall_count = 0;               // 连续命中帧数(防抖)
    std::atomic<uint64_t> fall_seq{0};     // 姿态事件序号(沿触发)
    bool fall_latched = false;             // 姿态报警沿触发锁存
    chrono::steady_clock::time_point fall_latch_ts{};
    string pose_action;                    // 当前命中的姿态动作
    float pose_score = 0.0f;               // 当前动作得分
    cv::Mat display_frame;
    cv::Mat fence_fill;              // 围栏填充缓存(纯色图, 与帧内容无关)
    uint64_t fence_ver = 0;          // 对应 FenceEngine 版本
    std::atomic<uint64_t> disp_seq{0};
    int frame_count = 0;
    int skip_frames = 3;
    bool size_recorded = false;
    bool alarm_latched = false;      // 报警沿触发: 每次新报警只截一张
    chrono::steady_clock::time_point last_alarm_ts{};
    chrono::steady_clock::time_point episode_start{};  // 本回合报警开始时刻
    mutex mtx;
};

static json loadJson(const string& path) {
    ifstream ifs(path);
    if (!ifs.is_open()) return json::object();
    json j; ifs >> j; return j;
}
static void saveJson(const string& path, const json& j) {
    ofstream ofs(path); ofs << j.dump(4) << endl;
}

static void buildFenceFill(cv::Mat& fill, const vector<FenceRegion>& fences,
                           const cv::Size& size, float s) {
    fill = cv::Mat::zeros(size, CV_8UC3);
    vector<vector<cv::Point>> contours;
    for (auto& f : fences) {
        if (!f.active || f.polygon.size() < 3) continue;
        vector<cv::Point> pts;
        for (auto& p : f.polygon)
            pts.push_back(cv::Point((int)(p.x * s), (int)(p.y * s)));
        contours.push_back(std::move(pts));
    }
    if (!contours.empty())
        cv::drawContours(fill, contours, -1, cv::Scalar(0, 200, 0), -1);
}

static void drawFenceEdges(cv::Mat& frame, const vector<FenceRegion>& fences, float s) {
    for (auto& f : fences) {
        if (!f.active || f.polygon.size() < 3) continue;
        vector<cv::Point> pts;
        for (auto& p : f.polygon)
            pts.push_back(cv::Point((int)(p.x * s), (int)(p.y * s)));
        vector<vector<cv::Point>> pp = {pts};
        cv::polylines(frame, pp, true, cv::Scalar(0, 255, 0), 2);
        if (!f.name.empty())
            cv::putText(frame, f.name, pts[0], cv::FONT_HERSHEY_SIMPLEX,
                        0.6, cv::Scalar(0, 255, 0), 2);
    }
}

static void drawAlarmBanner(cv::Mat& shot, int channel,
                            const vector<FenceEvent>& events) {
    char tbuf[32];
    time_t t = time(nullptr);
    struct tm tmv;
    localtime_r(&t, &tmv);
    strftime(tbuf, sizeof(tbuf), "%Y-%m-%d %H:%M:%S", &tmv);

    const double fs = 0.45;
    const int thick = 1, lh = 18, pad = 4;
    vector<string> lines;
    lines.push_back(string("!! ALARM !!  CH") + to_string(channel)
                    + "  " + tbuf);
    size_t n = events.size() < 3 ? events.size() : 3;
    for (size_t i = 0; i < n; i++) {
        char b[160];
        snprintf(b, sizeof(b), "%s %.0f%% -> %s",
                 events[i].detection_class_name.c_str(),
                 events[i].confidence * 100.0f,
                 events[i].fence_name.c_str());
        lines.push_back(b);
    }

    int w = 0, bh = pad * 2 + lh * (int)lines.size();
    for (auto& l : lines) {
        int tw = 0, th2 = 0;
        cv::getTextSize(l, cv::FONT_HERSHEY_SIMPLEX, fs, thick, &th2);
        if (tw > w) w = tw;
    }
    w += pad * 2;
    if (w > shot.cols) w = shot.cols;

    cv::rectangle(shot, cv::Rect(0, 0, w, bh), cv::Scalar(0, 0, 255), -1);
    for (size_t i = 0; i < lines.size(); i++)
        cv::putText(shot, lines[i], cv::Point(pad, pad + 13 + (int)i * lh),
                    cv::FONT_HERSHEY_SIMPLEX, fs, cv::Scalar(255, 255, 255), thick,
                    cv::LINE_AA);
}

static void drawDets(cv::Mat& frame, const vector<Detection>& dets,
                     const vector<FenceEvent>& events, float s,
                     bool show_alarm_text = true) {
    for (auto& det : dets) {
        bool in_fence = false;
        for (auto& ev : events)
            if (det.bbox.contains(ev.point)) { in_fence = true; break; }
        cv::Scalar color = in_fence ? cv::Scalar(0, 0, 255)
                                    : cv::Scalar(0, 255, 0);
        int thick = in_fence ? 3 : 2;
        cv::Rect rb((int)(det.bbox.x * s), (int)(det.bbox.y * s),
                    (int)(det.bbox.width * s), (int)(det.bbox.height * s));
        cv::rectangle(frame, rb, color, thick);
        char buf[128];
        snprintf(buf, sizeof(buf), "%s %.0f%%",
                 det.class_name.c_str(), det.confidence * 100);
        cv::putText(frame, buf,
                    cv::Point(rb.x, rb.y - 6),
                    cv::FONT_HERSHEY_SIMPLEX, 0.5, color, 1);
    }
    if (show_alarm_text && !events.empty()) {
        cv::putText(frame, "!! ALARM !!", cv::Point(10, 30),
                    cv::FONT_HERSHEY_SIMPLEX, 1.0, cv::Scalar(0, 0, 255), 3);
        char ebuf[256];
        snprintf(ebuf, sizeof(ebuf), "%s in %s (%.0f%%)",
                 events[0].detection_class_name.c_str(),
                 events[0].fence_name.c_str(),
                 events[0].confidence * 100);
        cv::putText(frame, ebuf, cv::Point(10, 60),
                    cv::FONT_HERSHEY_SIMPLEX, 0.7, cv::Scalar(0, 0, 255), 2);
    }
}

// COCO 17 关键点骨架连接(用于姿态叠加显示)
static const int POSE_SKELETON[][2] = {
    {0,1},{0,2},{1,3},{2,4},{5,6},{5,7},{7,9},{6,8},{8,10},
    {5,11},{6,12},{11,12},{11,13},{13,15},{12,14},{14,16}
};
static const char* POSE_KPT_NAMES[] = {
    "nose","l_eye","r_eye","l_ear","r_ear",
    "l_sho","r_sho","l_elb","r_elb","l_wri","r_wri",
    "l_hip","r_hip","l_knee","r_knee","l_ank","r_ank"
};

static void drawPoseDets(cv::Mat& frame, const vector<PersonPose>& poses,
                         const vector<PersonPose>& falls, float s,
                         bool show_skeleton = true) {
    for (auto& p : poses) {
        bool is_fall = false;
        for (auto& f : falls)
            if (f.bbox == p.bbox) { is_fall = true; break; }
        cv::Scalar color = is_fall ? cv::Scalar(0, 0, 255)
                                   : cv::Scalar(255, 255, 0);
        cv::Rect rb((int)(p.bbox.x * s), (int)(p.bbox.y * s),
                    (int)(p.bbox.width * s), (int)(p.bbox.height * s));
        cv::rectangle(frame, rb, color, 2);

        if (show_skeleton && p.keypoints.size() == 17) {
            // 关键点连线
            for (auto& sk : POSE_SKELETON) {
                int a = sk[0], b = sk[1];
                if (p.keypoint_conf.size() == 17 &&
                    p.keypoint_conf[a] > 0.3f && p.keypoint_conf[b] > 0.3f) {
                    cv::line(frame,
                             cv::Point((int)(p.keypoints[a].x * s),
                                       (int)(p.keypoints[a].y * s)),
                             cv::Point((int)(p.keypoints[b].x * s),
                                       (int)(p.keypoints[b].y * s)),
                             color, 2);
                }
            }
            // 关键点
            for (int k = 0; k < 17; k++) {
                if (p.keypoint_conf[k] > 0.3f) {
                    cv::circle(frame,
                               cv::Point((int)(p.keypoints[k].x * s),
                                         (int)(p.keypoints[k].y * s)),
                               3, cv::Scalar(0, 255, 255), -1);
                }
            }
        }
    }
    for (auto& f : falls) {
        cv::Rect rb((int)(f.bbox.x * s), (int)(f.bbox.y * s),
                    (int)(f.bbox.width * s), (int)(f.bbox.height * s));
        cv::rectangle(frame, rb, cv::Scalar(0, 0, 255), 3);
        cv::putText(frame, "FALL", cv::Point(rb.x, rb.y - 6),
                    cv::FONT_HERSHEY_SIMPLEX, 0.6, cv::Scalar(0, 0, 255), 2);
    }
}

static void drawPoseBanner(cv::Mat& shot, int channel, const PersonPose& fall,
                           const string& action = "跌倒") {
    char tbuf[32];
    time_t t = time(nullptr);
    struct tm tmv;
    localtime_r(&t, &tmv);
    strftime(tbuf, sizeof(tbuf), "%Y-%m-%d %H:%M:%S", &tmv);

    string line1 = "!! " + action + " !!  CH" + to_string(channel) + "  " + tbuf;
    char line2[128];
    snprintf(line2, sizeof(line2), "person %.0f%% 姿态%s",
             fall.confidence * 100, action.c_str());

    const double fs = 0.45;
    const int thick = 1, lh = 18, pad = 4;
    vector<string> lines = {line1, line2};
    int w = 0, bh = pad * 2 + lh * (int)lines.size();
    for (auto& l : lines) {
        int tw = 0, th2 = 0;
        cv::getTextSize(l, cv::FONT_HERSHEY_SIMPLEX, fs, thick, &th2);
        if (tw > w) w = tw;
    }
    w += pad * 2;
    if (w > shot.cols) w = shot.cols;

    cv::rectangle(shot, cv::Rect(0, 0, w, bh), cv::Scalar(0, 0, 255), -1);
    for (size_t i = 0; i < lines.size(); i++)
        cv::putText(shot, lines[i], cv::Point(pad, pad + 13 + (int)i * lh),
                    cv::FONT_HERSHEY_SIMPLEX, fs, cv::Scalar(255, 255, 255), thick,
                    cv::LINE_AA);
}

int main(int argc, char* argv[]) {
    signal(SIGINT, sigHandler);
    signal(SIGTERM, sigHandler);

    string config_path = (argc > 1) ? argv[1] : "config/config.json";
    json cfg = loadJson(config_path);
    if (cfg.empty()) {
        cerr << "配置文件不存在: " << config_path << endl;
        return 1;
    }

    int skip_frames = cfg.value("skip_frames", 3);
    int web_port = cfg.value("web_port", 8080);
    string model_path = cfg.value("model_path", "models/yolov5s_rk3576_int8.rknn");
    int input_size = cfg.value("input_size", 640);
    float conf_thresh = cfg.value("conf_thresh", 0.35f);
    float nms_thresh = cfg.value("nms_thresh", 0.45f);
    string fence_file = cfg.value("fence_file", "config/fences.json");
    int alarm_retention_days = cfg.value("alarm_retention_days", 30);

    // ========== 本机画面输出(HDMI显示器) ==========
    string app_name = cfg.value("app_name", "钢包工位视频监测系统");
    // 工位功能总开关(临时关闭可禁用钢包位/工位切换/空闲检测)
    bool enable_bucket = cfg.value("enable_bucket", true);
    // 两个独立显示器输出: 网格(普通通道) + 钢包位(工位左右摄像头)
    bool grid_output = cfg.value("grid_output", true);
    bool steel_output = cfg.value("steel_output", true);
    int hdmi_grid_cols = cfg.value("hdmi_grid_cols", 0);
    bool hdmi_fullscreen = cfg.value("hdmi_fullscreen", true);
    cout << "[Display] 网格输出: " << (grid_output ? "启用" : "禁用")
         << " 钢包位输出: " << (steel_output ? "启用" : "禁用")
         << " 工位功能: " << (enable_bucket ? "启用" : "禁用")
         << " 网格列=" << hdmi_grid_cols
         << " 全屏=" << (hdmi_fullscreen ? "是" : "否") << endl;

    // ========== 姿态识别(跌倒检测) ==========
    string pose_model_path = cfg.value("pose_model_path",
                                       "models/yolov5s-pose_rk3588_int8.rknn");
    int pose_input_size = cfg.value("pose_input_size", 640);
    float pose_conf_thresh = cfg.value("pose_conf_thresh", 0.35f);
    float pose_nms_thresh = cfg.value("pose_nms_thresh", 0.45f);
    float fall_thresh = cfg.value("fall_thresh", 0.5f);
    int fall_frames = cfg.value("fall_frames", 3);
    bool target_enabled = cfg.value("target_enabled", true);
    bool pose_enabled = cfg.value("pose_enabled", false);
    vector<string> pose_alarm_classes;
    if (cfg.contains("pose_alarm_classes") && cfg["pose_alarm_classes"].is_array())
        for (auto& c : cfg["pose_alarm_classes"])
            pose_alarm_classes.push_back(c.get<string>());
    if (pose_alarm_classes.empty())
        pose_alarm_classes = {"person"};
    // 跌倒触发联动继电器(默认复用围栏报警继电器 y01)
    vector<string> fall_relays;
    if (cfg.contains("fall_relays") && cfg["fall_relays"].is_array())
        for (auto& c : cfg["fall_relays"])
            if (c.is_string()) fall_relays.push_back(c.get<string>());
    if (fall_relays.empty()) fall_relays = {"y01"};
    cout << "[Target] 目标识别: " << (target_enabled ? "启用" : "禁用") << endl;
    cout << "[Pose] 姿态识别: " << (pose_enabled ? "启用" : "禁用")
         << " 模型=" << pose_model_path
         << " 跌倒阈值=" << fall_thresh
         << " 连续" << fall_frames << "帧确认" << endl;

    vector<string> alarm_classes;
    if (cfg.contains("alarm_classes") && cfg["alarm_classes"].is_array())
        for (auto& c : cfg["alarm_classes"])
            alarm_classes.push_back(c.get<string>());
    if (alarm_classes.empty())
        alarm_classes = {"person", "bicycle", "car", "motorcycle", "bus", "truck"};

    bool reboot_enabled = false;
    int rb_cycle = 1;
    int rb_h = 3, rb_m = 30;
    string rb_done_date;
    if (cfg.contains("auto_reboot")) {
        auto& ar = cfg["auto_reboot"];
        reboot_enabled = ar.value("enabled", false);
        rb_cycle = ar.value("cycle", 1);
        if (rb_cycle < 1) rb_cycle = 1;
        sscanf(ar.value("time", "03:30").c_str(), "%d:%d", &rb_h, &rb_m);
        if (rb_h < 0 || rb_h > 23 || rb_m < 0 || rb_m > 59) { rb_h = 3; rb_m = 30; }
    }
    cout << "[System] 定时重启: " << (reboot_enabled ? "启用" : "禁用")
         << " 周期" << rb_cycle << "天 时间 "
         << rb_h << ":" << (rb_m < 10 ? "0" : "") << rb_m << endl;

    RelayConfig rc;
    json rj = cfg.value("relay", json::object());
    rc.host        = rj.value("host", "192.168.1.253");
    rc.port        = rj.value("port", 1030);
    rc.device_addr = rj.value("device_addr", 1);
    // 脉冲时长统一用秒; 兼容旧配置pulse_ms
    rc.pulse_sec   = max(1, rj.value("pulse_sec",
                                    rj.value("pulse_ms", 3000) / 1000));
    int rearm_sec = clamp(rj.value("rearm_sec", 10), 1, 600);
    // 单回合上限: 报警开始后最多动作N秒(0=不限), 之后静默直到重新武装
    int alarm_max_sec = clamp(rj.value("alarm_max_sec", 30), 0, 3600);

    // DI输入→输出联动绑定: {"x1":["y01","y02"],...}
    map<string, vector<string>> di_bindings;
    if (rj.contains("di_bindings") && rj["di_bindings"].is_object())
        for (auto& [k, v] : rj["di_bindings"].items())
            if (v.is_array())
                for (auto& c : v)
                    if (c.is_string()) di_bindings[k].push_back(c.get<string>());

    // DI/DO通道别名: {"x1":"大门雷达","y02":"声光报警器",...}
    map<string, string> rly_alias;
    if (rj.contains("aliases") && rj["aliases"].is_object())
        for (auto& [k, v] : rj["aliases"].items())
            if (v.is_string()) rly_alias[k] = v.get<string>();

    // 输出通道模式: [{"channel":"y01","mode":"normal|cycle","interval_sec":1},...]
    array<YChanMode, 8> ycfg;
    if (rj.contains("y_config") && rj["y_config"].is_array())
        for (auto& e : rj["y_config"]) {
            string ch = e.value("channel", "");
            if (ch.size() == 3 && ch[0] == 'y') {
                int idx = (ch[1] - '0') * 10 + (ch[2] - '0');
                if (idx >= 1 && idx <= 8) {
                    string m = e.value("mode", "normal");
                    ycfg[idx - 1].mode = (m == "cycle") ? 1 : 0;
                    ycfg[idx - 1].interval_sec = e.value("interval_sec", 1.0);
                }
            }
        }

    cout << "========================================" << endl;
    cout << "  ZoneAlarm - RK3576 NPU 车辆检测电子围栏" << endl;
    cout << "  推理: RKNN NPU" << endl;
    cout << "  解码: MPP 硬解" << endl;
    cout << "  Web端口: " << web_port << endl;
    cout << "  报警策略: 脉冲" << rc.pulse_sec << "秒/回合上限"
         << alarm_max_sec << "秒/重新武装" << rearm_sec << "秒" << endl;
    cout << "========================================" << endl;

    // NPU 核心分配: 检测绑 Core0, 姿态绑 Core1, 两模型并行推理
    int det_core = cfg.value("det_core_mask", 1);   // 默认 Core0
    int pose_core = cfg.value("pose_core_mask", 2); // 默认 Core1
    YoloDetector detector;
    if (target_enabled && !detector.load(model_path, input_size, conf_thresh, nms_thresh, det_core)) {
        cerr << "RKNN模型加载失败!" << endl;
        return 1;
    }
    cout << "[RKNN] 检测核心掩码: " << det_core << endl;

    PoseDetector poseDetector;
    FallAnalyzer fallAnalyzer;
    fallAnalyzer.setThreshold(fall_thresh);
    bool pose_hand_raise = cfg.value("pose_hand_raise", true);
    bool pose_crouch = cfg.value("pose_crouch", true);
    fallAnalyzer.setHandRaiseEnabled(pose_hand_raise);
    fallAnalyzer.setCrouchEnabled(pose_crouch);
    cout << "[Pose] 动作类型: 跌倒/倒地(固定)"
         << " 举手呼救=" << (pose_hand_raise ? "开" : "关")
         << " 异常蹲坐=" << (pose_crouch ? "开" : "关") << endl;
    bool pose_ok = false;
    if (pose_enabled) {
        if (poseDetector.load(pose_model_path, pose_input_size,
                              pose_conf_thresh, pose_nms_thresh, pose_core)) {
            pose_ok = true;
            cout << "[Pose] 姿态模型加载成功, 跌倒检测已就绪, 核心掩码: " << pose_core << endl;
        } else {
            cerr << "[Pose] 姿态模型加载失败: " << pose_model_path
                 << " (继续使用纯围栏检测)" << endl;
        }
    }

    FenceEngine fenceEngine;
    fenceEngine.loadFences(fence_file);

    RelayCtrl relay;
    relay.setConfig(rc);
    relay.setModes(ycfg);
    relay.start();

    AlarmHistory alarmHistory;
    alarmHistory.init("data/alarms.db", "data/screenshots");
    alarmHistory.cleanup(alarm_retention_days);
    cout << "[Alarm] 历史清理: 保留" << alarm_retention_days << "天" << endl;

    // ========== 工位管理模块 ==========
    BucketManager bucketManager;
    bucketManager.loadConfig(cfg);

    IdleDetector idleDetector(cfg.value("idle_timeout", 5));

    // RFID 或 Modbus
    string module_type = cfg.value("module_type", "RFID");
    unique_ptr<RfidClient> rfidClient;
    unique_ptr<ModbusClient> modbusClient;

    if (module_type == "RFID" && cfg.contains("rfid")) {
        RfidConfig rfidCfg;
        auto& r = cfg["rfid"];
        rfidCfg.ip = r.value("ip", "");
        rfidCfg.port = r.value("port", 60000);
        rfidCfg.stability_time = r.value("stability_time", 5);
        rfidCfg.stability_count = r.value("stability_count", 3);

        rfidClient = make_unique<RfidClient>();
        rfidClient->setConfig(rfidCfg);
        rfidClient->setTagCallback([&](const string& tag) {
            idleDetector.feed(tag);
            if (!tag.empty() && enable_bucket) {
                bucketManager.checkAutoSwitch(tag);
            }
        });
        rfidClient->setStateCallback([&](bool online) {
            cout << "[RFID] 状态: " << (online ? "在线" : "离线") << endl;
        });
        if (rfidClient->connect()) {
            cout << "[RFID] 初始化成功" << endl;
        }
    } else if (module_type == "Modbus" && cfg.contains("modbus")) {
        ModbusConfig modbusCfg;
        auto& m = cfg["modbus"];
        modbusCfg.ip = m.value("ip", "");
        modbusCfg.port = m.value("port", 502);
        modbusCfg.frequency = m.value("frequency", 100);
        modbusCfg.stability_count = m.value("stability_count", 3);

        modbusClient = make_unique<ModbusClient>();
        modbusClient->setConfig(modbusCfg);
        modbusClient->setDataCallback([&](const vector<bool>& coils) {
            idleDetector.feed(coils);
            if (enable_bucket) bucketManager.checkAutoSwitch(coils);
        });
        modbusClient->setStateCallback([&](bool online) {
            cout << "[Modbus] 状态: " << (online ? "在线" : "离线") << endl;
        });
        if (modbusClient->connect()) {
            cout << "[Modbus] 初始化成功" << endl;
        }
    }

    // ========== 通道容器 ==========
    static const int kMaxChannels = 8;
    mutex channels_mtx;
    vector<shared_ptr<ChannelState>> channels;

    // 钢包位专用通道(id=100左, 101右), 跟随工位切换, 独立于普通rtsp通道
    static const int kBucketLeftId = 100;
    static const int kBucketRightId = 101;
    mutex bucket_channels_mtx;
    vector<shared_ptr<ChannelState>> bucket_channels;

    WebServer web;
    DisplayOutput displayGrid;    // 普通通道网格(自动布局)
    DisplayOutput displayBucket;  // 钢包位(当前工位左右摄像头)
    web.setPort(web_port);

    // 登录凭据(默认admin/admin), 持久化于config.json的web_auth
    string web_user = "admin", web_pass = "admin";
    {
        json wa = cfg.value("web_auth", json::object());
        web_user = wa.value("username", "admin");
        web_pass = wa.value("password", "admin");
    }
    web.setAuthHooks({
        [&](const string& u, const string& p) {
            return u == web_user && p == web_pass;
        },
        [&]() -> string { return web_user; },
        [&](const string& oldp, const string& u, const string& np) -> bool {
            if (oldp != web_pass || np.empty()) return false;
            if (!u.empty()) web_user = u;
            web_pass = np;
            json full = loadJson(config_path);
            full["web_auth"] = {{"username", web_user}, {"password", web_pass}};
            saveJson(config_path, full);
            cout << "[System] 登录凭证已更新: 用户 " << web_user << endl;
            return true;
        }
    });

    auto makeChannel = [&](int id, const string& name, const string& url) {
        auto ch = make_shared<ChannelState>();
        ch->id = id;
        ch->skip_frames = skip_frames;
        ch->pose_running = pose_ok;   // 姿态识别默认开启(模型加载成功时)
        ch->rga.init(input_size, input_size);
        ch->capture = make_shared<RtspCapture>(id, url, name);
        return ch;
    };
    auto registerChannelProviders = [&](shared_ptr<ChannelState> ch) {
        web.setFrameProvider(ch->id, [ch]() -> cv::Mat {
            lock_guard<mutex> lk(ch->mtx);
            if (!ch->display_frame.empty())
                return ch->display_frame.clone();
            return cv::Mat(360, 640, CV_8UC3, cv::Scalar(0, 0, 0));
        });
        web.setFrameSeqProvider(ch->id, [ch]() -> uint64_t {
            return ch->disp_seq.load(std::memory_order_relaxed);
        });
    };

    json rtsp_list = cfg.value("rtsp", json::array());
    for (int i = 0; i < (int)rtsp_list.size() && i < kMaxChannels; i++) {
        auto ch = makeChannel(rtsp_list[i].value("id", i),
                              rtsp_list[i].value("name", ""),
                              rtsp_list[i].value("url", ""));
        ch->capture->start();
        registerChannelProviders(ch);
        lock_guard<mutex> lk(channels_mtx);
        channels.push_back(std::move(ch));
    }
    cout << "[Main] 视频通道: " << channels.size() << "/"
         << kMaxChannels << " 路" << endl;

    // 钢包位专用通道(占位创建, 工位激活时替换为工位左右摄像头)
    if (enable_bucket) {
        auto chL = makeChannel(kBucketLeftId, "钢包位左", "");
        auto chR = makeChannel(kBucketRightId, "钢包位右", "");
        lock_guard<mutex> lk(bucket_channels_mtx);
        bucket_channels.push_back(chL);
        bucket_channels.push_back(chR);
        cout << "[Main] 钢包位专用通道: 左CH" << kBucketLeftId
             << " 右CH" << kBucketRightId << endl;
    }

    // ========== 工位切换回调 ==========
    // 钢包位专用通道跟随工位切换(左右摄像头), 普通rtsp通道不受影响
    bucketManager.setActivateCallback([&](const BucketInfo* old, const BucketInfo* cur) {
        if (!enable_bucket) {
            idleDetector.reset();
            return;
        }
        cerr << "[Bucket] 回调触发: old=" << (old ? old->description : "null")
             << " cur=" << (cur ? cur->description : "null") << endl;
        // 停止旧工位钢包位摄像头
        if (old && old->id >= 0) {
            lock_guard<mutex> lk(bucket_channels_mtx);
            for (auto& ch : bucket_channels) ch->capture->stop();
            cerr << "[Bucket] 停止钢包位摄像头" << endl;
        }
        // 启动新工位钢包位摄像头
        if (cur && cur->id >= 0) {
            lock_guard<mutex> lk(bucket_channels_mtx);
            cerr << "[Bucket] 激活工位: " << cur->description << endl;
            for (auto& ch : bucket_channels) {
                if (ch->id == kBucketLeftId && !cur->leftCamera.url.empty()) {
                    ch->capture->stop();
                    ch->capture = make_shared<RtspCapture>(kBucketLeftId,
                        cur->leftCamera.url, cur->description + "_左");
                    ch->capture->start();
                    cerr << "[Bucket] 钢包位左摄像头: " << cur->leftCamera.url << endl;
                }
                if (ch->id == kBucketRightId && !cur->rightCamera.url.empty()) {
                    ch->capture->stop();
                    ch->capture = make_shared<RtspCapture>(kBucketRightId,
                        cur->rightCamera.url, cur->description + "_右");
                    ch->capture->start();
                    cerr << "[Bucket] 钢包位右摄像头: " << cur->rightCamera.url << endl;
                }
            }
        } else {
            cerr << "[Bucket] 工位取消激活" << endl;
        }
        idleDetector.reset();
        cerr << "[Bucket] 回调完成" << endl;
    });

    // ========== Web API: 工位管理 ==========

    web.setGetHandler("/api/status", [&]() -> string {
        json s;
        s["running"] = true;
        s["model"] = model_path;
        s["npu"] = "RKNN";
        s["skip_frames"] = skip_frames;
        s["conf_thresh"] = conf_thresh;
        s["alarm_retention_days"] = alarm_retention_days;
        s["alarm_classes"] = alarm_classes;
        s["target_enabled"] = target_enabled;
        s["pose_enabled"] = pose_ok;
        s["pose_cfg_enabled"] = pose_enabled;
        s["pose_model"] = pose_model_path;
        s["fall_thresh"] = fall_thresh;
        s["fall_frames"] = fall_frames;
        s["fall_relays"] = fall_relays;
        s["grid_output"] = grid_output;
        s["steel_output"] = steel_output;
        json arr = json::array();
        {
            lock_guard<mutex> lk(channels_mtx);
            for (auto& ch : channels) {
                json c; c["id"] = ch->id;
                c["name"] = ch->capture->name();
                c["url"] = ch->capture->url();
                c["connected"] = ch->capture->isRunning();
                c["online"] = ch->capture->online();
                c["frame_age_ms"] = ch->capture->frameAgeMs();
                c["frames"] = ch->capture->framesDecoded();
                c["width"] = ch->capture->frameWidth();
                c["height"] = ch->capture->frameHeight();
                c["pose_running"] = ch->pose_running;
                c["fall_count"] = ch->pose_fall_count;
                c["falls"] = (int)ch->fall_poses.size();
                arr.push_back(c);
            }
        }
        s["channels"] = arr;
        return s.dump();
    });

    // ========== Web API: 工位管理 ==========
    web.setGetHandler("/api/buckets", [&]() -> string {
        json r;
        r["buckets"] = bucketManager.saveConfig();
        r["active_id"] = bucketManager.getActiveBucketId();
        r["mode"] = bucketManager.getSwitchMode() == SwitchMode::AUTO ? "auto" : "hand";
        return r.dump();
    });

    web.setPostHandler("/api/buckets", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            if (j.contains("buckets") && j["buckets"].is_array()) {
                // 保存工位列表
                json full = loadJson(config_path);
                full["buckets"] = j["buckets"];
                saveJson(config_path, full);
                bucketManager.loadConfig(full);
                cout << "[Bucket] 配置已保存" << endl;
            }
            if (j.contains("mode")) {
                string mode = j["mode"].get<string>();
                bucketManager.setSwitchMode(mode == "auto" ? SwitchMode::AUTO : SwitchMode::HAND);
            }
            if (j.contains("activate")) {
                int id = j["activate"].get<int>();
                bucketManager.activateBucket(id);
            }
            return R"({"ok":true})";
        } catch (exception& e) {
            return string(R"({"ok":false,"error":")") + e.what() + R"("})";
        }
    });

    web.setGetHandler("/api/buckets/status", [&]() -> string {
        json r;
        r["module_type"] = module_type;
        if (rfidClient) {
            r["rfid"]["online"] = rfidClient->isOnline();
            r["rfid"]["last_tag"] = rfidClient->lastTag();
        }
        if (modbusClient) {
            r["modbus"]["online"] = modbusClient->isOnline();
        }
        r["active_id"] = bucketManager.getActiveBucketId();
        r["mode"] = bucketManager.getSwitchMode() == SwitchMode::AUTO ? "auto" : "hand";
        return r.dump();
    });

    web.setPostHandler("/api/buckets/activate", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            int id = j.value("id", -1);
            bucketManager.setSwitchMode(SwitchMode::HAND);
            bucketManager.activateBucket(id);
            return R"({"ok":true})";
        } catch (...) {
            return R"({"ok":false})";
        }
    });

    web.setPostHandler("/api/buckets/mode", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            string mode = j.value("mode", "auto");
            bucketManager.setSwitchMode(mode == "auto" ? SwitchMode::AUTO : SwitchMode::HAND);
            return R"({"ok":true})";
        } catch (...) {
            return R"({"ok":false})";
        }
    });

    // ========== Web API: 通讯配置 ==========
    web.setGetHandler("/api/module/config", [&]() -> string {
        json r;
        r["module_type"] = module_type;
        if (rfidClient) r["rfid"] = {
            {"ip", rfidClient->getConfig().ip},
            {"port", rfidClient->getConfig().port},
            {"stability_time", rfidClient->getConfig().stability_time},
            {"stability_count", rfidClient->getConfig().stability_count}
        };
        if (modbusClient) r["modbus"] = {
            {"ip", modbusClient->getConfig().ip},
            {"port", modbusClient->getConfig().port},
            {"frequency", modbusClient->getConfig().frequency},
            {"stability_count", modbusClient->getConfig().stability_count}
        };
        r["idle_timeout"] = cfg.value("idle_timeout", 5);
        return r.dump();
    });

    web.setPostHandler("/api/module/config", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            json full = loadJson(config_path);

            if (j.contains("module_type")) {
                module_type = j["module_type"].get<string>();
                full["module_type"] = module_type;
            }
            if (j.contains("rfid")) {
                full["rfid"] = j["rfid"];
                if (rfidClient) {
                    RfidConfig rfidCfg;
                    rfidCfg.ip = j["rfid"].value("ip", "");
                    rfidCfg.port = j["rfid"].value("port", 60000);
                    rfidCfg.stability_time = j["rfid"].value("stability_time", 5);
                    rfidCfg.stability_count = j["rfid"].value("stability_count", 3);
                    rfidClient->setConfig(rfidCfg);
                }
            }
            if (j.contains("modbus")) {
                full["modbus"] = j["modbus"];
                if (modbusClient) {
                    ModbusConfig modbusCfg;
                    modbusCfg.ip = j["modbus"].value("ip", "");
                    modbusCfg.port = j["modbus"].value("port", 502);
                    modbusCfg.frequency = j["modbus"].value("frequency", 100);
                    modbusCfg.stability_count = j["modbus"].value("stability_count", 3);
                    modbusClient->setConfig(modbusCfg);
                }
            }
            if (j.contains("idle_timeout")) {
                full["idle_timeout"] = j["idle_timeout"];
                idleDetector.setTimeout(j["idle_timeout"].get<int>());
            }

            saveJson(config_path, full);
            cout << "[Config] 通讯配置已保存" << endl;
            return R"({"ok":true})";
        } catch (exception& e) {
            return string(R"({"ok":false,"error":")") + e.what() + R"("})";
        }
    });

    web.setGetHandler("/api/fences", [&]() -> string {
        json r = json::object();
        vector<int> ids;
        {
            lock_guard<mutex> lk(channels_mtx);
            for (auto& ch : channels) ids.push_back(ch->id);
        }
        for (int cid : ids) {
                auto fs = fenceEngine.getFences(cid);
                json fa = json::array();
                for (auto& f : fs) {
                    json fj; fj["id"] = f.id; fj["name"] = f.name;
                    fj["active"] = f.active;
                    json pts = json::array();
                    for (auto& p : f.polygon) pts.push_back({p.x, p.y});
                    fj["polygon"] = pts;
                    json rl = json::array();
                    for (auto& r : f.relays) rl.push_back(r);
                    fj["relays"] = rl;
                    fa.push_back(fj);
                }
                r[to_string(cid)] = fa;
        }
        return r.dump();
        return r.dump();
    });

    web.setPostHandler("/api/fences", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            vector<int> ids;
            {
                lock_guard<mutex> lk(channels_mtx);
                for (auto& ch : channels) ids.push_back(ch->id);
            }
            for (int cid : ids) {
                string key = to_string(cid);
                if (j.contains(key)) {
                    vector<FenceRegion> fences;
                    for (auto& fj : j[key]) {
                        FenceRegion fr;
                        fr.id = fj.value("id", 0);
                        fr.name = fj.value("name", "");
                        fr.active = fj.value("active", true);
                        if (fj.contains("relays") && fj["relays"].is_array())
                            for (auto& r : fj["relays"])
                                if (r.is_string())
                                    fr.relays.push_back(r.get<string>());
                        for (auto& pt : fj["polygon"])
                            fr.polygon.push_back(cv::Point2f(pt[0], pt[1]));
                        fences.push_back(fr);
                    }
                    fenceEngine.setFences(cid, fences);
                }
            }
            fenceEngine.saveFences(fence_file);
            return R"({"ok":true})";
        } catch (exception& e) {
            return string(R"({"ok":false,"error":")") + e.what() + R"("})";
        }
    });

    auto validYChannel = [](const string& ch) -> bool {
        if (ch.size() != 3 || ch[0] != 'y') return false;
        if (!isdigit((unsigned char)ch[1]) || !isdigit((unsigned char)ch[2]))
            return false;
        int n = (ch[1] - '0') * 10 + (ch[2] - '0');
        return n >= 1 && n <= 8;
    };

    // 持久化输出通道模式到 config.json
    auto saveYConfig = [&](const array<YChanMode, 8>& modes) {
        json full = loadJson(config_path);
        if (!full.contains("relay") || !full["relay"].is_object())
            full["relay"] = json::object();
        json arr = json::array();
        for (int i = 0; i < 8; i++) {
            arr.push_back({
                {"channel", "y0" + to_string(i + 1)},
                {"mode", modes[i].mode == 1 ? "cycle" : "normal"},
                {"interval_sec", modes[i].interval_sec}
            });
        }
        full["relay"]["y_config"] = arr;
        saveJson(config_path, full);
    };

    web.setPostHandler("/api/relay", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            string ch = j.value("channel", "");
            int st = j.value("state", -1);
            if (!validYChannel(ch) || (st != 0 && st != 1))
                return R"({"ok":false,"error":"bad channel/state"})";
            int idx = (ch[1] - '0') * 10 + (ch[2] - '0') - 1;
            if (idx >= relay.getOutCount())
                return R"({"ok":false,"error":"no such channel"})";
            // 周期模式下的通道被手动控制时, 自动切回正常模式
            auto modes = relay.getModes();
            if (modes[idx].mode == 1) {
                modes[idx].mode = 0;
                relay.setModes(modes);
                saveYConfig(modes);
                cout << "[Relay] " << ch << " 手动控制, 已切回正常模式" << endl;
            }
            if (relay.setChannel(ch, st)) {
                alarmHistory.recordAction("手动",
                    ch + (st ? " 手动闭合" : " 手动断开"), ch);
                return R"({"ok":true})";
            }
            return R"({"ok":false,"error":"offline"})";
        } catch (...) {}
        return R"({"ok":false})";
    });

    web.setGetHandler("/api/relay/status", [&]() -> string {
        json s;
        s["online"] = relay.isOnline();
        auto xs = relay.getX();
        auto ys = relay.getY();
        json xa = json::array(), ya = json::array();
        for (int i = 0; i < 8; i++) { xa.push_back(xs[i]); ya.push_back(ys[i]); }
        s["x"] = xa;
        s["y"] = ya;
        s["nx"] = relay.getInCount();    // 实际输入路数
        s["ny"] = relay.getOutCount();   // 实际输出路数
        auto modes = relay.getModes();
        json ma = json::array(), ca = json::array();
        for (int i = 0; i < 8; i++) {
            ma.push_back(modes[i].mode == 1 ? "cycle" : "normal");
            ca.push_back(modes[i].interval_sec);
        }
        s["ymode"] = ma;
        s["ycyc"] = ca;
        RelayConfig c = relay.getConfig();
        s["host"] = c.host;
        s["port"] = c.port;
        s["device_addr"] = c.device_addr;
        s["pulse_sec"] = c.pulse_sec;
        s["rearm_sec"] = rearm_sec;
        s["alarm_max_sec"] = alarm_max_sec;
        {
            json al = json::object();
            for (auto& [k, v] : rly_alias) al[k] = v;
            s["alias"] = al;
        }
        return s.dump();
    });

    web.setPostHandler("/api/relay/mode", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            if (!j.contains("items") || !j["items"].is_array())
                return R"({"ok":false,"error":"items required"})";
            array<YChanMode, 8> modes = relay.getModes();
            for (auto& e : j["items"]) {
                string ch = e.value("channel", "");
                if (ch.size() != 3 || ch[0] != 'y') continue;
                int idx = (ch[1] - '0') * 10 + (ch[2] - '0');
                if (idx < 1 || idx > 8) continue;
                string m = e.value("mode", "");
                if (m != "normal" && m != "cycle") continue;
                modes[idx - 1].mode = (m == "cycle") ? 1 : 0;
                if (e.contains("interval_sec"))
                    modes[idx - 1].interval_sec = e["interval_sec"].get<double>();
            }
            relay.setModes(modes);
            saveYConfig(modes);
            cout << "[Relay] 输出模式更新" << endl;
            return R"({"ok":true})";
        } catch (...) { return R"({"ok":false})"; }
    });

    web.setPostHandler("/api/relay/config", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            RelayConfig c = relay.getConfig();
            if (j.contains("host") && j["host"].is_string()) {
                string h = j["host"].get<string>();
                if (!h.empty()) c.host = h;
            }
            if (j.contains("port")) {
                int p = j["port"].get<int>();
                if (p >= 1 && p <= 65535) c.port = p;
            }
            if (j.contains("device_addr")) {
                int a = j["device_addr"].get<int>();
                if (a >= 0 && a <= 254) c.device_addr = a;
            }
            if (j.contains("pulse_sec")) {
                int v = j["pulse_sec"].get<int>();
                if (v >= 1 && v <= 3600) c.pulse_sec = v;
            }
            if (j.contains("rearm_sec")) {
                int v = j["rearm_sec"].get<int>();
                if (v >= 1 && v <= 600) rearm_sec = v;
            }
            if (j.contains("alarm_max_sec")) {
                int v = j["alarm_max_sec"].get<int>();
                if (v >= 0 && v <= 3600) alarm_max_sec = v;
            }
            rc = c;
            relay.setConfig(c);
            json full = loadJson(config_path);
            if (!full.contains("relay") || !full["relay"].is_object())
                full["relay"] = json::object();
            full["relay"]["host"] = c.host;
            full["relay"]["port"] = c.port;
            full["relay"]["device_addr"] = c.device_addr;
            full["relay"]["pulse_sec"] = c.pulse_sec;
            full["relay"]["rearm_sec"] = rearm_sec;
            full["relay"]["alarm_max_sec"] = alarm_max_sec;
            full["relay"].erase("channel");
            full["relay"].erase("pulse_ms");
            full["relay"].erase("alarm_mode");
            full["relay"].erase("di_pulse_sec");
            saveJson(config_path, full);
            cout << "[Relay] 配置更新: " << c.host << ":" << c.port
                 << " 地址" << c.device_addr
                 << " 脉冲" << c.pulse_sec << "秒"
                 << " 回合上限" << alarm_max_sec << "秒"
                 << " 重新武装" << rearm_sec << "秒" << endl;
            return R"({"ok":true})";
        } catch (...) { return R"({"ok":false})"; }
    });

    web.setGetHandler("/api/relay/bindings", [&]() -> string {
        json b = json::object();
        for (int i = 1; i <= 8; i++) {
            string k = "x" + to_string(i);
            json arr = json::array();
            auto it = di_bindings.find(k);
            if (it != di_bindings.end())
                for (auto& c : it->second) arr.push_back(c);
            b[k] = arr;
        }
        return b.dump();
    });

    web.setPostHandler("/api/relay/bindings", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            map<string, vector<string>> nb;
            for (auto& [k, v] : j.items()) {
                if (!v.is_array()) continue;
                vector<string> chans;
                for (auto& c : v)
                    if (c.is_string()) {
                        string ch = c.get<string>();
                        if (validYChannel(ch)) chans.push_back(ch);
                    }
                if (!chans.empty()) nb[k] = chans;
            }
            di_bindings = nb;
            json full = loadJson(config_path);
            if (!full.contains("relay") || !full["relay"].is_object())
                full["relay"] = json::object();
            json db = json::object();
            for (auto& [k, v] : di_bindings) db[k] = v;
            full["relay"]["di_bindings"] = db;
            saveJson(config_path, full);
            return R"({"ok":true})";
        } catch (...) { return R"({"ok":false})"; }
    });

    // ---- 通道别名 ----
    auto normAliasKey = [](string k) -> string {
        if (k.empty()) return "";
        k[0] = (char)tolower((unsigned char)k[0]);
        if (k[0] != 'x' && k[0] != 'y') return "";
        int n = 0;
        try { n = stoi(k.substr(1)); } catch (...) { return ""; }
        if (n < 1 || n > 8) return "";
        if (k[0] == 'y') return "y" + to_string(n).insert(0, n < 10 ? "0" : "");
        return "x" + to_string(n);
    };

    web.setGetHandler("/api/relay/aliases", [&]() -> string {
        json a = json::object();
        for (auto& [k, v] : rly_alias) a[k] = v;
        return a.dump();
    });

    web.setPostHandler("/api/relay/aliases", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            map<string, string> na;
            for (auto& [k, v] : j.items())
                if (v.is_string()) {
                    string key = normAliasKey(k);
                    if (!key.empty()) na[key] = v.get<string>();
                }
            rly_alias = na;
            json full = loadJson(config_path);
            if (!full.contains("relay") || !full["relay"].is_object())
                full["relay"] = json::object();
            json aj = json::object();
            for (auto& [k, v] : rly_alias) aj[k] = v;
            full["relay"]["aliases"] = aj;
            saveJson(config_path, full);
            cout << "[Relay] 别名已更新: " << rly_alias.size() << " 条" << endl;
            return R"({"ok":true})";
        } catch (...) { return R"({"ok":false})"; }
    });

    // ---- 继电器动作历史 ----
    web.setGetHandler("/api/relay/actions", [&]() -> string {
        json arr = json::array();
        auto acts = alarmHistory.getActions(200);
        for (auto& a : acts) {
            json aj;
            aj["id"] = a.id;
            aj["timestamp"] = a.timestamp;
            aj["source"] = a.source;
            aj["detail"] = a.detail;
            aj["channels"] = a.channels;
            arr.push_back(aj);
        }
        json r; r["items"] = arr;
        return r.dump();
    });

    web.setPostHandler("/api/relay/actions/clear",
                       [&](const string&) -> string {
        alarmHistory.clearActions();
        return R"({"ok":true})";
    });

    // ---------- 通道管理: 增删改查 + 热插拔 ----------
    auto persistRtspList = [&]() {
        json full = loadJson(config_path);
        json arr = json::array();
        {
            lock_guard<mutex> lk(channels_mtx);
            for (auto& ch : channels) {
                arr.push_back({{"id", ch->id},
                               {"name", ch->capture->name()},
                               {"url", ch->capture->url()}});
            }
        }
        full["rtsp"] = arr;
        saveJson(config_path, full);
    };

    web.setPostHandler("/api/channels/save", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            string name = j.value("name", "");
            string url = j.value("url", "");
            int id = j.value("id", -1);
            if (url.rfind("rtsp://", 0) != 0)
                return R"({"ok":false,"error":"URL必须以rtsp://开头"})";
            if (name.empty()) name = "通道";

            shared_ptr<ChannelState> old;
            auto nu = makeChannel(id, name, url);
            {
                lock_guard<mutex> lk(channels_mtx);
                if (id >= 0) {
                    for (auto& ch : channels)
                        if (ch->id == id) { old = ch; break; }
                    if (!old)
                        return R"({"ok":false,"error":"通道不存在"})";
                } else {
                    if ((int)channels.size() >= kMaxChannels)
                        return R"({"ok":false,"error":"已达最大通道数8"})";
                    int max_id = -1;
                    for (auto& ch : channels) max_id = std::max(max_id, ch->id);
                    nu->id = id = max_id + 1;
                }
                nu->capture->start();
                for (auto& c : channels)
                    if (c.get() == old.get()) { c = nu; break; }
                if (!old) channels.push_back(nu);
            }
            registerChannelProviders(nu);
            if (old) old->capture->stop();   // 锁外停旧流(join可能耗时)
            persistRtspList();
            cout << "[Channel] " << (old ? "修改" : "添加")
                 << " CH" << id << ": " << url << endl;
            json r; r["ok"] = true; r["id"] = id;
            return r.dump();
        } catch (exception& e) {
            return string(R"({"ok":false,"error":")") + e.what() + R"("})";
        }
    });

    web.setPostHandler("/api/channels/delete", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            int id = j.value("id", -1);
            shared_ptr<ChannelState> victim;
            {
                lock_guard<mutex> lk(channels_mtx);
                for (auto it = channels.begin(); it != channels.end(); ++it) {
                    if ((*it)->id == id) {
                        victim = *it;
                        channels.erase(it);
                        break;
                    }
                }
            }
            if (!victim)
                return R"({"ok":false,"error":"通道不存在"})";
            web.removeFrameProvider(id);
            victim->capture->stop();   // 锁外停止并回收解码线程
            persistRtspList();
            cout << "[Channel] 删除 CH" << id << endl;
            return R"({"ok":true})";
        } catch (...) { return R"({"ok":false})"; }
    });

    web.setPostHandler("/api/channels/test", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            string url = j.value("url", "");
            if (url.rfind("rtsp://", 0) != 0)
                return R"({"ok":false,"error":"URL必须以rtsp://开头"})";
            // 解析 host[:port] (忽略用户信息与路径)
            string rest = url.substr(7);
            size_t at = rest.find('@');
            if (at != string::npos) rest = rest.substr(at + 1);
            size_t slash = rest.find('/');
            if (slash != string::npos) rest = rest.substr(0, slash);
            string host = rest;
            int port = 554;
            size_t colon = rest.find(':');
            if (colon != string::npos) {
                host = rest.substr(0, colon);
                port = stoi(rest.substr(colon + 1));
            }
            int fd = socket(AF_INET, SOCK_STREAM, 0);
            if (fd < 0) return R"({"ok":false,"error":"socket失败"})";
            int fl = fcntl(fd, F_GETFL, 0);
            fcntl(fd, F_SETFL, fl | O_NONBLOCK);
            struct sockaddr_in addr;
            memset(&addr, 0, sizeof(addr));
            addr.sin_family = AF_INET;
            addr.sin_port = htons(port);
            inet_pton(AF_INET, host.c_str(), &addr.sin_addr);
            bool ok = false;
            string err;
            if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == 0) {
                ok = true;
            } else if (errno == EINPROGRESS) {
                struct pollfd pfd = {fd, POLLOUT, 0};
                if (poll(&pfd, 1, 3000) > 0) {
                    int e = 0;
                    socklen_t el = sizeof(e);
                    getsockopt(fd, SOL_SOCKET, SO_ERROR, &e, &el);
                    ok = (e == 0);
                    if (!ok) err = strerror(e);
                } else {
                    err = "连接超时";
                }
            } else {
                err = strerror(errno);
            }
            close(fd);
            json r;
            r["ok"] = ok;
            r["host"] = host + ":" + to_string(port);
            if (!err.empty()) r["error"] = err;
            cout << "[Channel] 连通测试 " << host << ":" << port
                 << " -> " << (ok ? "OK" : err) << endl;
            return r.dump();
        } catch (exception& e) {
            return string(R"({"ok":false,"error":")") + e.what() + R"("})";
        }
    });

    web.setPostHandler("/api/config", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            json full = loadJson(config_path);
            if (j.contains("skip_frames")) {
                full["skip_frames"] = j["skip_frames"];
                skip_frames = j["skip_frames"].get<int>();
                lock_guard<mutex> lk(channels_mtx);
                for (auto& ch : channels) ch->skip_frames = skip_frames;
            }
            if (j.contains("conf_thresh"))
                full["conf_thresh"] = j["conf_thresh"];
            if (j.contains("target_enabled")) {
                bool en = j["target_enabled"].get<bool>();
                full["target_enabled"] = en;
                target_enabled = en;
                cout << "[Target] 目标识别: " << (en ? "启用" : "禁用")
                     << " (重启后生效)" << endl;
            }
            if (j.contains("pose_enabled")) {
                bool en = j["pose_enabled"].get<bool>();
                full["pose_enabled"] = en;
                pose_enabled = en;
                cout << "[Pose] 姿态识别: " << (en ? "启用" : "禁用")
                     << " (重启后生效)" << endl;
            }
            if (j.contains("grid_output")) {
                bool v = j["grid_output"].get<bool>();
                full["grid_output"] = v;
                grid_output = v;
                cout << "[Display] 网格输出: " << (v ? "启用" : "禁用")
                     << " (重启后生效)" << endl;
            }
            if (j.contains("steel_output")) {
                bool v = j["steel_output"].get<bool>();
                full["steel_output"] = v;
                steel_output = v;
                cout << "[Display] 钢包位输出: " << (v ? "启用" : "禁用")
                     << " (重启后生效)" << endl;
            }
            if (j.contains("alarm_retention_days")) {
                int v = j["alarm_retention_days"].get<int>();
                if (v < 1) v = 1;
                full["alarm_retention_days"] = v;
                alarm_retention_days = v;
            }
            if (j.contains("alarm_classes") && j["alarm_classes"].is_array()) {
                vector<string> ac;
                for (auto& c : j["alarm_classes"])
                    if (c.is_string()) ac.push_back(c.get<string>());
                full["alarm_classes"] = ac;
                alarm_classes = ac;
            }
            if (j.contains("auto_reboot") && j["auto_reboot"].is_object()) {
                auto& ar = j["auto_reboot"];
                if (!full.contains("auto_reboot") || !full["auto_reboot"].is_object())
                    full["auto_reboot"] = json::object();
                if (ar.contains("enabled")) {
                    bool en = ar["enabled"].get<bool>();
                    full["auto_reboot"]["enabled"] = en;
                    reboot_enabled = en;
                }
                if (ar.contains("cycle")) {
                    int c = ar["cycle"].get<int>();
                    if (c < 1) c = 1;
                    if (c > 365) c = 365;
                    full["auto_reboot"]["cycle"] = c;
                    rb_cycle = c;
                }
                if (ar.contains("time") && ar["time"].is_string()) {
                    int h = -1, m = -1;
                    sscanf(ar["time"].get<string>().c_str(), "%d:%d", &h, &m);
                    if (h >= 0 && h <= 23 && m >= 0 && m <= 59) {
                        char norm[8];
                        snprintf(norm, sizeof(norm), "%02d:%02d", h, m);
                        full["auto_reboot"]["time"] = norm;
                        rb_h = h; rb_m = m;
                        rb_done_date.clear();
                    }
                }
                cout << "[System] 定时重启更新: "
                     << (reboot_enabled ? "启用" : "禁用")
                     << " 周期" << rb_cycle << "天 时间"
                     << rb_h << ":" << (rb_m < 10 ? "0" : "") << rb_m << endl;
            }
            saveJson(config_path, full);
            return R"({"ok":true})";
        } catch (...) { return R"({"ok":false})"; }
    });

    web.setGetHandler("/api/system", [&]() -> string {
        json s;
        s["reboot_enabled"] = reboot_enabled;
        s["reboot_cycle"] = rb_cycle;
        char tbuf[8];
        snprintf(tbuf, sizeof(tbuf), "%02d:%02d", rb_h, rb_m);
        s["reboot_time"] = tbuf;
        return s.dump();
    });

    web.setPostHandler("/api/reboot", [&](const string&) -> string {
        cout << "[System] Web触发立即重启" << endl;
        cout.flush();
        std::thread([]() {
            this_thread::sleep_for(chrono::milliseconds(500));
            sync();
            system("(sleep 1; systemctl reboot -i) >/dev/null 2>&1 &");
            fflush(nullptr);
            _exit(0);
        }).detach();
        return R"({"ok":true})";
    });

    web.setGetHandlerQ("/api/alarms", [&](const map<string, string>& q) -> string {
        auto geti = [&](const string& k, int def) -> int {
            auto it = q.find(k);
            if (it == q.end() || it->second.empty()) return def;
            return atoi(it->second.c_str());
        };
        auto gets = [&](const string& k) -> string {
            auto it = q.find(k);
            return it == q.end() ? string() : it->second;
        };
        int limit = clamp(geti("limit", 200), 1, 500);
        int ch = geti("channel", -1);
        string start = gets("start");
        string end = gets("end");

        json arr = json::array();
        auto alarms = alarmHistory.getAlarms(limit, 0, ch, start, end);
        for (auto& a : alarms) {
            json aj;
            aj["id"] = a.id;
            aj["timestamp"] = a.timestamp;
            aj["channel"] = a.channel;
            aj["fence_name"] = a.fence_name;
            aj["class_name"] = a.class_name;
            aj["confidence"] = a.confidence;
            aj["screenshot"] = a.screenshot_path;
            arr.push_back(aj);
        }
        json r;
        r["total"] = alarmHistory.getAlarmCount(ch, start, end);
        r["items"] = arr;
        return r.dump();
    });

    web.setPostHandler("/api/alarms/delete", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            int64_t id = j.value("id", 0);
            if (alarmHistory.deleteAlarm(id)) return R"({"ok":true})";
        } catch (...) {}
        return R"({"ok":false})";
    });

    web.setPostHandler("/api/alarms/clear", [&](const string& body) -> string {
        alarmHistory.clearAll();
        return R"({"ok":true})";
    });

    web.setGetHandler("/api/alarms/count", [&]() -> string {
        json r;
        r["count"] = alarmHistory.getAlarmCount();
        return r.dump();
    });

    // ========== 姿态报警历史 API ==========
    web.setGetHandlerQ("/api/pose/alarms", [&](const map<string, string>& q) -> string {
        auto geti = [&](const string& k, int def) -> int {
            auto it = q.find(k);
            if (it == q.end() || it->second.empty()) return def;
            return atoi(it->second.c_str());
        };
        auto gets = [&](const string& k) -> string {
            auto it = q.find(k);
            return it == q.end() ? string() : it->second;
        };
        int limit = clamp(geti("limit", 200), 1, 500);
        int ch = geti("channel", -1);
        string action = gets("action");
        string start = gets("start");
        string end = gets("end");

        json arr = json::array();
        auto list = alarmHistory.getPoseAlarms(limit, 0, ch, action, start, end);
        for (auto& a : list) {
            json aj;
            aj["id"] = a.id;
            aj["timestamp"] = a.timestamp;
            aj["channel"] = a.channel;
            aj["action"] = a.action;
            aj["score"] = a.score;
            aj["screenshot"] = a.screenshot_path;
            arr.push_back(aj);
        }
        json r;
        r["total"] = alarmHistory.getPoseAlarmCount(ch, action, start, end);
        r["items"] = arr;
        return r.dump();
    });

    web.setPostHandler("/api/pose/alarms/delete", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            int64_t id = j.value("id", 0);
            if (alarmHistory.deletePoseAlarm(id)) return R"({"ok":true})";
        } catch (...) {}
        return R"({"ok":false})";
    });

    web.setPostHandler("/api/pose/alarms/clear", [&](const string&) -> string {
        alarmHistory.clearPoseAlarms();
        return R"({"ok":true})";
    });

    web.setGetHandler("/api/pose/alarms/count", [&]() -> string {
        json r;
        r["count"] = alarmHistory.getPoseAlarmCount();
        return r.dump();
    });

    // 通道帧提供器已在创建时逐路注册(registerChannelProviders)

    // ========== 姿态识别 Web API ==========
    web.setGetHandler("/api/pose/status", [&]() -> string {
        json r;
        r["pose_enabled"] = pose_ok;
        r["pose_cfg_enabled"] = pose_enabled;
        r["model"] = pose_model_path;
        r["fall_thresh"] = fall_thresh;
        r["fall_frames"] = fall_frames;
        r["fall_relays"] = fall_relays;
        json chs = json::array();
        {
            lock_guard<mutex> lk(channels_mtx);
            for (auto& ch : channels) {
                json c;
                c["id"] = ch->id;
                c["running"] = ch->pose_running;
                c["fall_count"] = ch->pose_fall_count;
                c["falls"] = (int)ch->fall_poses.size();
                chs.push_back(c);
            }
        }
        r["channels"] = chs;
        return r.dump();
    });

    web.setPostHandler("/api/pose/config", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            json full = loadJson(config_path);
            if (j.contains("fall_thresh")) {
                float v = j["fall_thresh"].get<float>();
                if (v >= 0.0f && v <= 1.0f) {
                    fall_thresh = v;
                    fallAnalyzer.setThreshold(v);
                    full["fall_thresh"] = v;
                }
            }
            if (j.contains("fall_frames")) {
                int v = j["fall_frames"].get<int>();
                if (v >= 1 && v <= 30) {
                    fall_frames = v;
                    full["fall_frames"] = v;
                }
            }
            if (j.contains("fall_relays") && j["fall_relays"].is_array()) {
                fall_relays.clear();
                for (auto& c : j["fall_relays"])
                    if (c.is_string()) fall_relays.push_back(c.get<string>());
                full["fall_relays"] = fall_relays;
            }
            if (j.contains("channels") && j["channels"].is_object()) {
                lock_guard<mutex> lk(channels_mtx);
                for (auto& [k, v] : j["channels"].items()) {
                    int cid = atoi(k.c_str());
                    if (!v.is_object() || !v.contains("running")) continue;
                    bool run = v["running"].get<bool>();
                    for (auto& ch : channels)
                        if (ch->id == cid) {
                            ch->pose_running = run && pose_ok;
                            if (!ch->pose_running) ch->pose_fall_count = 0;
                        }
                }
            }
            saveJson(config_path, full);
            cout << "[Pose] 配置已更新: 阈值=" << fall_thresh
                 << " 连续" << fall_frames << "帧" << endl;
            return R"({"ok":true})";
        } catch (exception& e) {
            return string(R"({"ok":false,"error":")") + e.what() + R"("})";
        }
    });

    // ========== MJPEG推流开关(临时关闭省CPU) ==========
    web.setGetHandler("/api/mjpeg/status", [&]() -> string {
        json r;
        r["enabled"] = web.mjpegEnabled();
        return r.dump();
    });

    web.setPostHandler("/api/mjpeg/toggle", [&](const string& body) -> string {
        try {
            json j = json::parse(body);
            if (!j.contains("enabled"))
                return R"({"ok":false,"error":"enabled required"})";
            bool en = j["enabled"].get<bool>();
            web.setMjpegEnabled(en);
            cout << "[Web] MJPEG推流: " << (en ? "启用" : "临时关闭")
                 << " (省CPU)" << endl;
            json r;
            r["ok"] = true;
            r["enabled"] = en;
            return r.dump();
        } catch (exception& e) {
            return string(R"({"ok":false,"error":")") + e.what() + R"("})";
        }
    });

    web.start();
    // 网格布局固定为已配置的rtsp通道数, 避免启动/断帧时布局跳动
    int grid_fixed = (int)channels.size();
    displayGrid.start(grid_output, hdmi_grid_cols, app_name + " - 通道网格",
                      hdmi_fullscreen, 100, grid_fixed);
    displayBucket.start(steel_output && enable_bucket, 2, app_name + " - 钢包位",
                        hdmi_fullscreen, 100, 2);
    cout << "[Main] Ctrl+C 退出" << endl;

    // 自动激活第一个工位（如果有配置）
    if (enable_bucket) {
        auto bs = bucketManager.getBuckets();
        if (!bs.empty()) {
            cout << "[Main] 自动激活第一个工位: " << bs[0].description << endl;
            bucketManager.setSwitchMode(SwitchMode::AUTO);
            bucketManager.activateBucket(bs[0].id);
        }
    }

    auto last_pulse = chrono::steady_clock::now() - chrono::hours(1);
    auto last_di_pulse = chrono::steady_clock::now();
    array<uint8_t, 8> prev_x{};
    // DI联动状态: latched=回合进行中(触发过, 等待信号复位解锁)
    //             high_since=本回合起始时刻(回合上限计时)
    //             last_high=最后高电平时刻(解锁计时用)
    array<bool, 8> di_latched_{{false}};
    array<chrono::steady_clock::time_point, 8> di_last_high_{};
    array<chrono::steady_clock::time_point, 8> di_high_since_{};
    auto last_cleanup = chrono::steady_clock::now();
    auto last_rb_check = chrono::steady_clock::now() - chrono::seconds(20);

    while (g_running.load()) {
        this_thread::sleep_for(chrono::milliseconds(1));

        auto now_tc = chrono::steady_clock::now();
        if (chrono::duration_cast<chrono::hours>(now_tc - last_cleanup).count() >= 1) {
            alarmHistory.cleanup(alarm_retention_days);
            cout << "[Alarm] 定时清理完成: 保留" << alarm_retention_days << "天" << endl;
            last_cleanup = now_tc;
        }

        // 定时重启(每10秒检查一次, 每个周期日只触发一次)
        if (reboot_enabled &&
            chrono::duration_cast<chrono::seconds>(now_tc - last_rb_check).count() >= 10) {
            last_rb_check = now_tc;
            time_t t = time(nullptr);
            struct tm tmv;
            localtime_r(&t, &tmv);
            char today[16], hhmm[8];
            strftime(today, sizeof(today), "%Y-%m-%d", &tmv);
            strftime(hhmm, sizeof(hhmm), "%H:%M", &tmv);
            char target[8];
            snprintf(target, sizeof(target), "%02d:%02d", rb_h, rb_m);
            long day_num = (long)(t / 86400);
            bool cycle_hit = (rb_cycle <= 1) || (day_num % rb_cycle == 0);
            if (strcmp(hhmm, target) == 0 && cycle_hit && rb_done_date != today) {
                rb_done_date = today;
                cout << "[System] 定时重启触发: " << hhmm << endl;
                cout.flush();
                this_thread::sleep_for(chrono::milliseconds(800));
                sync();
                system("(sleep 1; systemctl reboot -i) >/dev/null 2>&1 &");
                fflush(nullptr);
                _exit(0);
            }
        }

        // RFID/Modbus空闲检测
        if (rfidClient) rfidClient->checkIdle();
        if (enable_bucket && idleDetector.isIdle() && bucketManager.getActiveBucketId() >= 0) {
            cout << "[Bucket] 空闲超时，取消激活" << endl;
            bucketManager.activateBucket(-1);
        }

        // DI输入联动: 与围栏报警同一套策略
        //   触发出现(上升沿) ──▶ 立即输出一个脉冲
        //   信号保持期间 ──▶ 每 pulse_sec 秒重复, 累计满 alarm_max_sec 秒后静默
        //   信号复位持续 rearm_sec 秒 ──▶ 重新武装, 下次触发再来一轮
        {
            array<uint8_t, 8> xs = relay.getX();
            for (int i = 0; i < 8; i++) {
                bool rise = (xs[i] && !prev_x[i]);

                // 解锁判定: 信号复位持续 rearm_sec 秒(高电平会刷新计时)
                if (di_latched_[i]) {
                    if (xs[i]) di_last_high_[i] = now_tc;
                    else if (chrono::duration_cast<chrono::seconds>(
                                 now_tc - di_last_high_[i]).count() >= rearm_sec)
                        di_latched_[i] = false;
                } else if (xs[i]) {
                    di_last_high_[i] = now_tc;
                }

                auto it = di_bindings.find("x" + to_string(i + 1));
                bool bound = it != di_bindings.end() && !it->second.empty();

                // 首次触发: 上升沿立即动作, 开启新回合
                if (rise && !bound) continue;
                if (rise && !di_latched_[i]) {
                    last_di_pulse = now_tc;   // 首发后重新起算重复节奏
                    relay.pulseChannels(it->second, rc.pulse_sec);
                    di_latched_[i] = true;
                    di_high_since_[i] = now_tc;
                    cout << "[DI] X" << (i + 1) << " 联动触发 -> "
                         << it->second.size() << "路继电器" << endl;
                    string chans;
                    for (auto& c : it->second) {
                        if (!chans.empty()) chans += ",";
                        chans += c;
                    }
                    alarmHistory.recordAction("输入联动",
                                              "X" + to_string(i + 1) +
                                                  " 信号有效", chans);
                    continue;
                }
                // 回合内重复: 信号保持 且 未超回合上限, 按节奏窗口重复
                if (!xs[i] || !di_latched_[i] || !bound) continue;
                bool within_round =
                    alarm_max_sec == 0 ||
                    chrono::duration_cast<chrono::milliseconds>(
                        now_tc - di_high_since_[i]).count() <
                        (long long)alarm_max_sec * 1000;
                if (!within_round) continue;
                auto dms = chrono::duration_cast<chrono::milliseconds>(
                    now_tc - last_di_pulse).count();
                if (dms > rc.pulse_sec * 1000) {
                    last_di_pulse = now_tc;
                    relay.pulseChannels(it->second, rc.pulse_sec);
                }
            }
            prev_x = xs;
        }

        // 通道快照: 热插拔期间主循环安全遍历
        vector<shared_ptr<ChannelState>> ch_snap;
        {
            lock_guard<mutex> lk(channels_mtx);
            ch_snap = channels;
        }
        // 钢包位专用通道(跟随工位切换)
        {
            lock_guard<mutex> lk(bucket_channels_mtx);
            for (auto& bc : bucket_channels)
                ch_snap.push_back(bc);
        }
        for (auto& ch : ch_snap) {
            Nv12Frame nv12;
            if (!ch->capture->grabNv12(nv12)) {
                if (ch->frame_count == 0 && ch->capture->isRunning())
                    this_thread::sleep_for(chrono::milliseconds(10));
                if (ch->frame_count == 0 && ch->id == 0) {
                    static int dbg_cnt = 0;
                    if (++dbg_cnt % 50 == 1)
                        cerr << "[CH" << ch->id << "] waiting for frame..." << endl;
                }
                continue;
            }
            ch->frame_count++;

            if (!ch->size_recorded && nv12.width > 0 && nv12.height > 0) {
                fenceEngine.setChannelSize(ch->id, nv12.width, nv12.height);
                ch->size_recorded = true;
                cout << "[CH" << ch->id << "] 分辨率: "
                     << nv12.width << "x" << nv12.height << endl;
            }

            bool do_infer = (ch->frame_count % (ch->skip_frames + 1) == 0);

            if (ch->frame_count <= 5) {
                cout << "[CH" << ch->id << "] frame=" << ch->frame_count
                     << " size=" << nv12.width << "x" << nv12.height
                     << " stride=" << nv12.stride << endl;
            }

            float scale = 1.0f;
            int pad_x = 0, pad_y = 0;
            if (do_infer)
                ch->rga.process(nv12, ch->rgb_buf, scale, pad_x, pad_y);

            if (do_infer && !ch->rgb_buf.empty()) {
                if (ch->frame_count <= 4)
                    cout << "[CH" << ch->id << "] infer frame=" << ch->frame_count
                         << " rgb=" << ch->rgb_buf.size() << endl;

                // 检测与姿态并行推理(不同NPU核), 缩短单帧处理时间
                vector<Detection> dets;
                vector<PersonPose> poses;
                bool do_det = target_enabled;
                bool do_pose = (pose_ok && ch->pose_running);
                if (do_det && do_pose) {
                    std::thread tPose([&]() {
                        poses = poseDetector.detect(ch->rgb_buf.data(),
                                                    nv12.width, nv12.height,
                                                    scale, pad_x, pad_y);
                    });
                    dets = detector.detect(ch->rgb_buf.data(),
                                           nv12.width, nv12.height,
                                           scale, pad_x, pad_y);
                    tPose.join();
                } else if (do_det) {
                    dets = detector.detect(ch->rgb_buf.data(),
                                           nv12.width, nv12.height,
                                           scale, pad_x, pad_y);
                } else if (do_pose) {
                    poses = poseDetector.detect(ch->rgb_buf.data(),
                                                nv12.width, nv12.height,
                                                scale, pad_x, pad_y);
                }

                vector<cv::Point2f> centers;
                vector<int> cids;
                vector<string> cnames;
                vector<float> confs;
                for (auto& d : dets) {
                    // 只统计勾选的入侵目标类别
                    if (!alarm_classes.empty() &&
                        find(alarm_classes.begin(), alarm_classes.end(),
                             d.class_name) == alarm_classes.end())
                        continue;
                    centers.push_back(cv::Point2f(
                        d.bbox.x + d.bbox.width / 2.0f,
                        d.bbox.y + d.bbox.height / 2.0f));
                    cids.push_back(d.class_id);
                    cnames.push_back(d.class_name);
                    confs.push_back(d.confidence);
                }
                auto events = fenceEngine.evaluate(
                    ch->id, centers, cids, cnames, confs);
                {
                    lock_guard<mutex> lk(ch->mtx);
                    ch->detections = dets;
                    ch->events = events;
                }

                // ========== 姿态识别(跌倒检测) ==========
                if (pose_ok && ch->pose_running) {
                    vector<PersonPose> falls;
                    // 对每个人做多动作分析, 取最高分动作
                    PoseAction bestAction = PoseAction::NONE;
                    float bestScore = 0.0f;
                    for (auto& p : poses) {
                        if (pose_alarm_classes.empty() ||
                            find(pose_alarm_classes.begin(),
                                 pose_alarm_classes.end(),
                                 "person") == pose_alarm_classes.end())
                            continue;
                        auto ar = fallAnalyzer.analyze(p);
                        if (ar.action != PoseAction::NONE &&
                            ar.action != PoseAction::LYING &&
                            ar.score > bestScore) {
                            bestAction = ar.action;
                            bestScore = ar.score;
                        }
                    }
                    bool hit = (bestAction != PoseAction::NONE);
                    // 连续 N 帧确认(防抖), 并按上升沿触发动作
                    if (hit) ch->pose_fall_count++;
                    else ch->pose_fall_count = 0;
                    bool pose_rising = (ch->pose_fall_count == fall_frames);
                    {
                        lock_guard<mutex> lk(ch->mtx);
                        ch->poses = poses;
                        ch->fall_poses = hit ? poses : vector<PersonPose>{};
                        ch->pose_action = hit ? poseActionName(bestAction) : "";
                        ch->pose_score = bestScore;
                    }
                    if (pose_rising) {
                        ch->fall_seq.fetch_add(1, std::memory_order_relaxed);
                        cout << "[Pose] CH" << ch->id << " 检测到"
                             << poseActionName(bestAction) << "("
                             << ch->pose_fall_count << "帧) score="
                             << bestScore << endl;
                    }
                    if (pose_rising && !ch->fall_latched) {
                        ch->fall_latched = true;
                        ch->fall_latch_ts = chrono::steady_clock::now();
                        string actName = poseActionName(bestAction);

                        // 联动报警: 触发继电器(可配置 fall_relays)
                        if (!fall_relays.empty()) {
                            relay.pulseChannels(fall_relays, rc.pulse_sec);
                            string chans;
                            for (auto& t : fall_relays) {
                                if (!chans.empty()) chans += ",";
                                chans += t;
                            }
                            alarmHistory.recordAction("姿态报警",
                                "CH" + to_string(ch->id) + " 检测到" + actName,
                                chans);
                        }

                        // 截图记录到姿态报警历史
                        std::vector<uint8_t> frgb;
                        int fout_w, fout_h;
                        ch->rga.processToRgb(nv12, frgb, fout_w, fout_h);
                        if (!frgb.empty()) {
                            cv::Mat fshot(fout_h, fout_w, CV_8UC3, frgb.data());
                            cv::cvtColor(fshot, fshot, cv::COLOR_RGB2BGR);
                            float fs = (nv12.width > 0)
                                       ? (float)fshot.cols / nv12.width : 1.0f;
                            drawPoseDets(fshot, poses, poses, fs);
                            drawPoseBanner(fshot, ch->id,
                                           poses.empty() ? PersonPose() : poses[0],
                                           actName);
                            alarmHistory.recordPoseAlarm(ch->id, actName,
                                                         bestScore, fshot);
                        }
                    }
                    // 动作消失(或恢复正常)持续 rearm_sec 秒后重新武装
                    if (ch->fall_latched && !hit) {
                        auto fnow = chrono::steady_clock::now();
                        if (chrono::duration_cast<chrono::seconds>(
                                fnow - ch->fall_latch_ts).count() >= rearm_sec)
                            ch->fall_latched = false;
                    }
                } else if (!pose_ok || !ch->pose_running) {
                    ch->pose_fall_count = 0;
                }

                if (!events.empty()) {
                    auto now = chrono::steady_clock::now();
                    // 动作判定(统一策略):
                    //   首次检测立即动作开启回合; 之后每 pulse_sec 秒重复,
                    //   回合累计满 alarm_max_sec 秒后静默,
                    //   直到目标消除持续 rearm_sec 秒重新武装
                    bool episode_start = !ch->alarm_latched;
                    if (episode_start) ch->episode_start = now;
                    bool within_round =
                        alarm_max_sec == 0 ||
                        chrono::duration_cast<chrono::milliseconds>(
                            now - ch->episode_start).count() <
                            (long long)alarm_max_sec * 1000;
                    bool do_action =
                        episode_start ||
                        (within_round &&
                         chrono::duration_cast<chrono::milliseconds>(
                             now - last_pulse).count() >
                             rc.pulse_sec * 1000);
                    if (do_action) {
                        last_pulse = now;
                        // 合并所有触发围栏绑定的输出通道, 去重后统一脉冲
                        set<string> trig;
                        auto fs = fenceEngine.getFences(ch->id);
                        for (auto& ev : events)
                            for (auto& f : fs)
                                if (f.id == ev.fence_id)
                                    for (auto& r : f.relays) trig.insert(r);
                        if (!trig.empty()) {
                            cout << "[Event] CH" << ch->id
                                 << " " << events[0].detection_class_name
                                 << " in " << events[0].fence_name
                                 << " -> " << trig.size() << "路继电器" << endl;
                            relay.pulseChannels(
                                vector<string>(trig.begin(), trig.end()),
                                rc.pulse_sec);
                            string chans;
                            for (auto& t : trig) {
                                if (!chans.empty()) chans += ",";
                                chans += t;
                            }
                            alarmHistory.recordAction("围栏报警",
                                events[0].detection_class_name + " 入侵 " +
                                events[0].fence_name + " (CH" +
                                to_string(ch->id) + ")", chans);
                        }
                    }
                    // 截图与动作配对: 每次动作必有对应截图证据
                    bool take_screenshot = do_action;
                    ch->alarm_latched = true;
                    ch->last_alarm_ts = now;
                    if (take_screenshot) {
                        std::vector<uint8_t> rgb8;
                        int out_w, out_h;
                        ch->rga.processToRgb(nv12, rgb8, out_w, out_h);
                        if (!rgb8.empty()) {                            cv::Mat shot(out_h, out_w, CV_8UC3, rgb8.data());
                            cv::cvtColor(shot, shot, cv::COLOR_RGB2BGR);
                            float sds = (nv12.width > 0)
                                        ? (float)shot.cols / nv12.width : 1.0f;

                            // 围栏: 填充+描边
                            auto fences = fenceEngine.getFences(ch->id);
                            bool hf = false;
                            for (auto& f : fences)
                                if (f.active && f.polygon.size() >= 3) { hf = true; break; }
                            if (hf) {
                                cv::Mat fill;
                                buildFenceFill(fill, fences, shot.size(), sds);
                                cv::addWeighted(fill, 0.15, shot, 0.85, 0, shot);
                                drawFenceEdges(shot, fences, sds);
                            }

                            // 目标框(报警目标红色高亮)
                            vector<Detection> dets_copy;
                            vector<FenceEvent> evs_copy;
                            {
                                lock_guard<mutex> lk(ch->mtx);
                                dets_copy = ch->detections;
                                evs_copy = ch->events;
                            }
                            drawDets(shot, dets_copy, evs_copy, sds, false);

                            // 左上角红底白字详细信息
                            drawAlarmBanner(shot, ch->id, events);

                            alarmHistory.record(ch->id, events[0].fence_name,
                                                events[0].detection_class_name,
                                                events[0].confidence, shot);
                        } else {
                            cerr << "[Alarm] 截图失败: RGA输出为空 CH"
                                 << ch->id << endl;
                        }
                    }
                } else {
                    // 报警消失需持续 rearm_sec 秒才重新武装,
                    // 防止目标检测抖动误判为"离开"
                    auto now2 = chrono::steady_clock::now();
                    if (ch->alarm_latched &&
                        chrono::duration_cast<chrono::seconds>(
                            now2 - ch->last_alarm_ts).count() >= rearm_sec)
                        ch->alarm_latched = false;
                }
            }

            // 显示帧: 每帧都生成(视频不跳帧), 推理仍按 skip_frames 跳帧
            // 检测框/围栏只在推理帧更新, 非推理帧复用最近一次推理结果
            cv::Mat display;
            {
                std::vector<uint8_t> rgb8;
                int out_w, out_h;
                ch->rga.processToRgb(nv12, rgb8, out_w, out_h);
                if (!rgb8.empty()) {
                    display = cv::Mat(out_h, out_w, CV_8UC3, rgb8.data()).clone();
                    cv::cvtColor(display, display, cv::COLOR_RGB2BGR);
                }
            }
            if (!display.empty()) {
                float ds = (nv12.width > 0) ? (float)display.cols / nv12.width : 1.0f;
                auto fences = fenceEngine.getFences(ch->id);
                uint64_t fv = fenceEngine.version();
                bool has_fence = false;
                for (auto& f : fences)
                    if (f.active && f.polygon.size() >= 3) { has_fence = true; break; }
                if (has_fence) {
                    if (ch->fence_ver != fv || ch->fence_fill.size() != display.size()) {
                        buildFenceFill(ch->fence_fill, fences, display.size(), ds);
                        ch->fence_ver = fv;
                    }
                    cv::addWeighted(ch->fence_fill, 0.15, display, 0.85, 0, display);
                    drawFenceEdges(display, fences, ds);
                } else {
                    ch->fence_ver = 0;
                    ch->fence_fill.release();
                }
                {
                    lock_guard<mutex> lk(ch->mtx);
                    drawDets(display, ch->detections, ch->events, ds);
                    if (pose_ok && ch->pose_running)
                        drawPoseDets(display, ch->poses, ch->fall_poses, ds);
                }
                char lbl[32];
                snprintf(lbl, sizeof(lbl), "CH%d", ch->id);
                cv::putText(display, lbl,
                            cv::Point(display.cols - 80, 25),
                            cv::FONT_HERSHEY_SIMPLEX, 0.7,
                            cv::Scalar(255, 255, 255), 2);
                lock_guard<mutex> lk(ch->mtx);
                ch->display_frame = display;
                ch->disp_seq.fetch_add(1, std::memory_order_relaxed);
            }
            // 输出到本机显示器(HDMI)
            if (displayGrid.isRunning() && ch->id < 100) {
                char dlbl[64];
                snprintf(dlbl, sizeof(dlbl), "CH%d %s",
                         ch->id, ch->capture->name().c_str());
                displayGrid.setFrame(ch->id, display, dlbl);
            }
            if (displayBucket.isRunning() && ch->id >= 100) {
                char dlbl[64];
                snprintf(dlbl, sizeof(dlbl), "%s",
                         ch->capture->name().c_str());
                displayBucket.setFrame(ch->id, display, dlbl);
            }
        }
    }

    cout << "[Main] 正在退出..." << endl;
    {
        lock_guard<mutex> lk(channels_mtx);
        for (auto& ch : channels) ch->capture->stop();
    }
    relay.stop();   // 先停继电器线程, 避免HTTP处理线程阻塞在transact上拖住web.stop()
    web.stop();
    cout << "[Main] 已退出" << endl;
    return 0;
}