#!/usr/bin/env bash
set -e

DIR="$(cd "$(dirname "$0")" && pwd)"
BUILD_DIR="$DIR/build"
JOBS=${JOBS:-$(nproc)}
CLEAN=0
REBUILD=0

usage() {
    cat << 'EOF'
Usage: ./build.sh [options]

Options:
  -c, --clean    Clean build from scratch
  -r, --rebuild  Reconfigure cmake (delete CMakeCache) then rebuild
  -j N           Number of parallel jobs (default: nproc)
  -h, --help     Show this help
EOF
}

while [ $# -gt 0 ]; do
    case "$1" in
        -c|--clean) CLEAN=1 ;;
        -r|--rebuild) REBUILD=1 ;;
        -j) JOBS="$2"; shift ;;
        -h|--help) usage; exit 0 ;;
        *) echo "Unknown option: $1"; usage; exit 1 ;;
    esac
    shift
done

if [ "$CLEAN" -eq 1 ]; then
    echo "Cleaning $BUILD_DIR ..."
    rm -rf "$BUILD_DIR"
fi

if [ "$REBUILD" -eq 1 ]; then
    rm -rf "$BUILD_DIR"
fi

if [ ! -f "$BUILD_DIR/Makefile" ]; then
    echo "Configuring with cmake ..."
    cmake -B "$BUILD_DIR" "$DIR"
fi

echo "Building with $JOBS jobs ..."
cmake --build "$BUILD_DIR" -j "$JOBS"

echo "Build complete: $BUILD_DIR/rtsp_multi_view"