#!/bin/sh

APP_NAME="frame_exporter"
APP_PATH="/usr/bin/t3hs/t3hs_frame_exporter"
APP_ARGS=""
PID_FILE="/var/run/t3hs/${APP_NAME}.pid"
ENABLED_FILE="/etc/t3hs/${APP_NAME}/enabled"

RUN_AS="root"
RESPAWN_DELAY=1

is_enabled() {
    [ -f "$ENABLED_FILE" ] && return 0 || return 1
}

start() {
    if [ -f "$PID_FILE" ]; then
        pid=$(cat "$PID_FILE")
        if kill -0 "$pid" 2>/dev/null; then
            echo "$APP_NAME is already running (pid $pid)"
            return 0
        fi
    fi

    echo "Starting $APP_NAME..."
    
    if is_enabled; then
        while is_enabled; do
            start-stop-daemon -S -b -m -p "$PID_FILE" -c "$RUN_AS" -x "$APP_PATH" -- $APP_ARGS >> /dev/null 2>&1
            sleep "$RESPAWN_DELAY"
        done &
    else
        start-stop-daemon -S -b -m -p "$PID_FILE" -c "$RUN_AS" -x "$APP_PATH" -- $APP_ARGS >> /dev/null 2>&1
    fi
}

stop() {
    echo "Stopping $APP_NAME..."
    start-stop-daemon -K -p "$PID_FILE"
    rm -f "$PID_FILE"
}

status() {
    if [ -f "$PID_FILE" ]; then
        pid=$(cat "$PID_FILE")
        if kill -0 "$pid" 2>/dev/null; then
            echo "$APP_NAME is running (pid $pid)"
            return 0
        else
            echo "$APP_NAME pid file exists but process is not running"
            return 1
        fi
    else
        echo "$APP_NAME is not running"
        return 3
    fi
}

enable() {
    touch "$ENABLED_FILE"
    echo "Enabled $APP_NAME to start at boot"
}

disable() {
    rm -f "$ENABLED_FILE"
    echo "Disabled $APP_NAME from starting at boot"
}

mkdir -p $(dirname "$PID_FILE")
mkdir -p $(dirname "$ENABLED_FILE")

case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        stop
        sleep 1
        start
        ;;
    status)
        status
        ;;
    enable)
        enable
        ;;
    disable)
        disable
        ;;
    *)
        echo "Usage: $0 {start|stop|restart|status|enable|disable}"
        exit 1
        ;;
esac

exit 0