using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using BITKit;
using UnityEngine.InputSystem;
using Cysharp.Threading.Tasks;
using System.Threading.Tasks;
namespace BITKit.Media
{
    public class VideoPlayer : MediaPlayer<UnityEngine.Video.VideoPlayer>
    {
        const string timeFormat = "HH:mm:ss";
        [Header(Constant.Header.Settings)]
        public InputAction playOrPauseAction;
        public bool log;
        [Header(Constant.Header.Debug)]
        public string currentTimeAsString;
        void Enable()
        {
            playOrPauseAction.Enable();
        }
        void Disable()
        {
            playOrPauseAction.Disable();
        }
        protected override void OnStart()
        {
            playOrPauseAction.performed += OnPlayOrPause;
            Prepare();
        }
        public override void Play()
        {
            if (isPlaying is false)
            {
                if (log)
                {
                    BIT4Log.Log<VideoPlayer>($"开始播放视频:{player.clip.name}");
                }
                DateTime totalDateTime = new();
                player.Play();
                isPlaying = true;
                onStartPlay.Invoke();

                totalDateTime = totalDateTime.AddSeconds(player.length);
                onSetTotalTime.Invoke((float)player.length);
                onSetTotalTimeAsString.Invoke(totalDateTime.ToString(timeFormat));
            }
            else
            {
                PlayOrPause();
            }
        }
        public override void Stop()
        {
            if (isPlaying)
            {
                player.Stop();
                isPlaying = false;
                onStopPlay.Invoke();
            }
        }
        public void Pause()
        {
            if (isPlaying)
            {
                if (player.isPaused is false)
                {
                    onPause.Invoke();
                    player.Pause();
                }
            }
        }
        public override void PlayOrPause()
        {
            if (isPlaying)
            {
                if (player.isPaused)
                {
                    onPlay.Invoke();
                    player.Play();
                }
                else
                {
                    Pause();
                }
            }
            else
            {
                Play();
            }
        }
        public override void UpdateProgess()
        {
            if (player.isPlaying && player.isPaused is false)
            {
                DateTime playDateTime = new();

                var doubleTime = player.time / player.length;
                currentTime = (float)doubleTime;

                playDateTime = playDateTime.AddSeconds(player.time);

                onTime.Invoke(currentTime);

                currentTimeAsString = playDateTime.ToString(timeFormat);
                onTimeAsString.Invoke(currentTimeAsString);
            }
        }
        public override void SetNormalizeTime(float time)
        {
            player.time = Mathf.Lerp(0, (float)player.length, time);
        }

        public override void Set<T>(T obj)
        {
            switch (obj)
            {
                case float time:
                    SetNormalizeTime(time);
                    break;
            }
        }
        public async void Prepare()
        {
            player.Prepare();
            Stop();
            SetNormalizeTime(0);
            Play();
            await Task.Delay(128, gameObject.GetCancellationTokenOnDestroy());
            Stop();
            SetNormalizeTime(0);
        }
        void OnPlayOrPause(InputAction.CallbackContext context)
        {
            Debug.Log(context);
            PlayOrPause();
        }
    }
}