#!/system/bin/sh
CONFIG_FILE="/data/local/tmp/virtualcam_config.json"
MODDIR=$(dirname "$0")
LIB_DST="/data/local/tmp/virtualcam_libs"
FFMPEG_BIN="/data/local/tmp/ffmpeg"

load_config() {
    [ -f "$CONFIG_FILE" ] || return
    SOURCE_TYPE=$(grep -o '"source_type":"[^"]*"' "$CONFIG_FILE" 2>/dev/null | cut -d'"' -f4)
    RTSP_URL=$(grep -o '"rtsp_url":"[^"]*"' "$CONFIG_FILE" 2>/dev/null | cut -d'"' -f4)
    MP4_PATH=$(grep -o '"mp4_path":"[^"]*"' "$CONFIG_FILE" 2>/dev/null | cut -d'"' -f4)
    RES_W=$(grep -o '"res_w":[0-9]*' "$CONFIG_FILE" 2>/dev/null | cut -d: -f2)
    RES_H=$(grep -o '"res_h":[0-9]*' "$CONFIG_FILE" 2>/dev/null | cut -d: -f2)
    FPS=$(grep -o '"fps":[0-9]*' "$CONFIG_FILE" 2>/dev/null | cut -d: -f2)
    : ${SOURCE_TYPE:=mp4} ${RTSP_URL:=rtsp://192.168.1.100:8554/stream}
    : ${MP4_PATH:=/sdcard/Movies/2.mp4} ${RES_W:=1920} ${RES_H:=1080} ${FPS:=30}
}

case "${1:-help}" in
    status)
        PROVIDER_PID=$(pgrep -f "virtual_camera_provider$" | head -1)
        FEEDER_PID=$(pgrep -f "ffmpeg.*video0" | head -1)
        V4L2=$(lsmod 2>/dev/null | grep -q v4l2loopback && echo 1 || echo 0)
        SVC=$(service list 2>/dev/null | grep -q "virtual/0" && echo 1 || echo 0)
        VIDEO=$(cat /sys/class/video4linux/video0/name 2>/dev/null || echo "not found")
        echo "{\"provider_pid\":${PROVIDER_PID:-0},\"feeder_pid\":${FEEDER_PID:-0},\"v4l2_loaded\":$V4L2,\"service_registered\":$SVC,\"video0\":\"$VIDEO\"}"
        ;;
    start)
        rmmod v4l2loopback 2>/dev/null; sleep 1
        insmod "$MODDIR/v4l2loopback.ko" devices=1 video_nr=0 card_label="VirtualCam" 2>/dev/null || true
        pkill -9 -f "virtual_camera_provider$" 2>/dev/null || true
        mkdir -p "$LIB_DST" 2>/dev/null
        cp "$MODDIR/vendor/lib64"/*.so "$LIB_DST/" 2>/dev/null
        nohup env LD_LIBRARY_PATH="$LIB_DST" "$MODDIR/vendor/bin/virtual_camera_provider" \
            -d /dev/video0 -w 1920 -h 1080 -i virtual > /dev/null 2>&1 &
        echo '{"status":"started"}'
        ;;
    stop)
        pkill -9 -f "virtual_camera_provider$" 2>/dev/null || true
        pkill -9 cameraserver 2>/dev/null || true
        echo '{"status":"stopped"}'
        ;;
    restart)
        pkill -9 -f "virtual_camera_provider$" 2>/dev/null || true
        pkill -9 cameraserver 2>/dev/null || true
        sleep 2
        mkdir -p "$LIB_DST" 2>/dev/null
        cp "$MODDIR/vendor/lib64"/*.so "$LIB_DST/" 2>/dev/null
        nohup env LD_LIBRARY_PATH="$LIB_DST" "$MODDIR/vendor/bin/virtual_camera_provider" \
            -d /dev/video0 -w 1920 -h 1080 -i virtual > /dev/null 2>&1 &
        echo '{"status":"restarted"}'
        ;;
    start_feeder)
        load_config
        pkill -9 -f "ffmpeg.*video0" 2>/dev/null || true
        if command -v "$FFMPEG_BIN" >/dev/null 2>&1; then
            FF="$FFMPEG_BIN"
        elif command -v ffmpeg >/dev/null 2>&1; then
            FF="ffmpeg"
        else
            echo '{"status":"error","message":"ffmpeg not found"}'
            exit 1
        fi
        if [ "$SOURCE_TYPE" = "rtsp" ]; then
            nohup "$FF" -rtsp_transport tcp -i "$RTSP_URL" \
                -f v4l2 -pix_fmt yuv420p /dev/video0 > /dev/null 2>&1 &
        elif [ "$SOURCE_TYPE" = "mp4" ] && [ -f "$MP4_PATH" ]; then
            nohup "$FF" -stream_loop -1 -re -i "$MP4_PATH" \
                -f v4l2 -pix_fmt yuv420p /dev/video0 > /dev/null 2>&1 &
        fi
        echo '{"status":"feeder_started"}'
        ;;
    stop_feeder)
        pkill -9 -f "ffmpeg.*video0" 2>/dev/null || true
        echo '{"status":"feeder_stopped"}'
        ;;
    get_config)
        load_config
        echo "{\"source_type\":\"$SOURCE_TYPE\",\"rtsp_url\":\"$RTSP_URL\",\"mp4_path\":\"$MP4_PATH\",\"res_w\":${RES_W:-1920},\"res_h\":${RES_H:-1080},\"fps\":${FPS:-30}}"
        ;;
    *)
        echo "Usage: $0 {status|start|stop|restart|start_feeder|stop_feeder|get_config}"
        ;;
esac