#!/bin/bash
### BEGIN INIT INFO
# Provides:          lume-watcher
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Watches directory and triggers Lume task
# Description:       Watches the specified directory and triggers the Deno Lume task when changes are detected.
### END INIT INFO

WATCHED_DIR="/var/www/html/soulmining/src"
OUTPUT_DIR="/var/www/html/soulmining"
COMMAND="cd $OUTPUT_DIR ; /home/haturatu/.deno/bin/deno task lume --dest=site"
FLAG_FILE="/tmp/command_running.flag"
COOLDOWN_TIME=60  # クールダウン時間（秒）
LAST_RUN_FILE="/tmp/last_run.time"
PIDFILE="/var/run/lume-watcher.pid"

# 現在の時間を取得
current_time() {
    date +%s
}

# 最後にコマンドを実行した時間を取得する（存在しない場合は0を返す）
get_last_run_time() {
    if [ -f "$LAST_RUN_FILE" ]; then
        cat "$LAST_RUN_FILE"
    else
        echo 0
    fi
}

# 最後にコマンドを実行した時間を記録する
set_last_run_time() {
    current_time > "$LAST_RUN_FILE"
}

# デーモンの開始
start() {
    echo "Starting lume-watcher..."
    if [ -f "$PIDFILE" ]; then
        echo "lume-watcher is already running."
        exit 1
    fi

    # 実際の監視プロセスをバックグラウンドで実行
    (
        while true; do
            if [ ! -f "$FLAG_FILE" ]; then
                inotifywait -e modify,create,delete -r "$WATCHED_DIR"
                last_run_time=$(get_last_run_time)
                now=$(current_time)
                elapsed_time=$((now - last_run_time))

                if [ "$elapsed_time" -ge "$COOLDOWN_TIME" ]; then
                    sleep $COOLDOWN_TIME
                    echo "Change detected, executing command..."
                    touch "$FLAG_FILE"
                    $COMMAND
                    rm -f "$FLAG_FILE"
                    set_last_run_time
                fi
            fi
            sleep 1
        done
    ) &
    echo $! > "$PIDFILE"
    echo "lume-watcher started."
}

# デーモンの停止
stop() {
    echo "Stopping lume-watcher..."
    if [ ! -f "$PIDFILE" ]; then
        echo "lume-watcher is not running."
        exit 1
    fi

    kill "$(cat $PIDFILE)" && rm -f "$PIDFILE"
    echo "lume-watcher stopped."
}

# デーモンのステータス確認
status() {
    if [ -f "$PIDFILE" ]; then
        echo "lume-watcher is running, PID: $(cat $PIDFILE)"
    else
        echo "lume-watcher is not running."
    fi
}

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

exit 0