using System;
using System.IO;
using System.Media;

namespace 報到系統客戶端.Services
{
    /// <summary>
    /// 通知音效服務，密集呼叫時會中斷先前的播放再重新播放。
    /// </summary>
    public static class NotificationSoundService
    {
        private static readonly string _dingWavePath =
            Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Sound\\ding.wav");
        private static readonly string _checkinWavePath =
            Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Sound\\CheckinOK.wav");
        private static readonly string _checkoutWavePath =
            Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Sound\\CheckoutOK.wav");

        private static SoundPlayer _dingPlayer;
        private static SoundPlayer _checkinPlayer;
        private static SoundPlayer _checkoutPlayer;

        private static void StopAll()
        {
            _dingPlayer?.Stop();
            _checkinPlayer?.Stop();
            _checkoutPlayer?.Stop();
        }

        private static void PlaySound(string path, ref SoundPlayer player)
        {
            if (!File.Exists(path))
                return;

            if (player == null)
                player = new SoundPlayer(path);

            StopAll();
            player.Play();
        }

        /// <summary>
        /// 播放 ding.wav；若有其他音效正在播放，先全部停止再播放。
        /// </summary>
        public static void Ding() => PlaySound(_dingWavePath, ref _dingPlayer);

        /// <summary>
        /// 播放 CheckinOK.wav；若有其他音效正在播放，先全部停止再播放。
        /// </summary>
        public static void CheckinOK() => PlaySound(_checkinWavePath, ref _checkinPlayer);

        /// <summary>
        /// 播放 CheckoutOK.wav；若有其他音效正在播放，先全部停止再播放。
        /// </summary>
        public static void CheckoutOK() => PlaySound(_checkoutWavePath, ref _checkoutPlayer);
    }
}