using UniRx;
using UnityEngine;

/// <summary>
/// Leviathan 视频 NPC：待机循环、成功/大三消各一段一次性视频，资源在本组件上拖拽（不必再依赖解码器上的 bytesFile）。
/// </summary>
public class EventMatchNpcLeviathanPresenter : EventMatchNpcPresenter
{
    [SerializeField] LeviathanVideoDecoderBase decoder;
    [SerializeField] TextAsset idleVideo;
    [SerializeField] TextAsset successVideo;
    [SerializeField] TextAsset successMoreVideo;

    void Awake()
    {
        if (decoder == null)
            decoder = GetComponent<LeviathanVideoDecoder>();
    }

    void Start()
    {
        if (decoder == null)
            return;
        decoder.Stop();
        PlayIdleInternal();
    }

    void OnDestroy()
    {
        if (decoder != null)
            decoder.OnPlayCompleted -= OnSuccessClipCompleted;
    }

    /// <summary>
    /// 多线程解码时 OnPlayCompleted 可能来自解码线程，需回到主线程再 Stop/PlayVideo。
    /// </summary>
    void OnSuccessClipCompleted()
    {
        if (decoder != null)
            decoder.OnPlayCompleted -= OnSuccessClipCompleted;
        MainThreadDispatcher.Post(_ => ApplySuccessFinishedOnMainThread(), null);
    }

    void ApplySuccessFinishedOnMainThread()
    {
        if (this == null)
            return;
        PlayIdleInternal();
    }

    void PlaySuccessClipInternal(TextAsset clip)
    {
        decoder.OnPlayCompleted -= OnSuccessClipCompleted;
        decoder.Stop();
        decoder.SetLooping(false);
        decoder.OnPlayCompleted += OnSuccessClipCompleted;
        int ret = decoder.PlayVideo(clip, decoder.AlphaType, multithreadedDecode: true);
        if (ret != 0)
        {
            decoder.OnPlayCompleted -= OnSuccessClipCompleted;
            PlayIdleInternal();
        }
    }

    public override void PlayMatchReaction(bool isSuccessMore)
    {
        TextAsset clip = isSuccessMore ? successMoreVideo : successVideo;
        if (decoder == null || clip == null)
        {
            PlayIdleInternal();
            return;
        }

        // 已在播成功/大三消等非待机视频时，不打断、不重切
        if (decoder.IsPlaying && idleVideo != null && decoder.bytesFile != null && decoder.bytesFile != idleVideo)
            return;

        decoder.OnPlayCompleted -= OnSuccessClipCompleted;
        PlaySuccessClipInternal(clip);
    }

    void PlayIdleInternal()
    {
        if (decoder == null || idleVideo == null)
            return;
        decoder.Stop();
        decoder.SetLooping(true);
        decoder.PlayVideo(idleVideo, decoder.AlphaType, multithreadedDecode: true);
    }
}