using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class AvProMovieState : MonoBehaviour {

    [System.Serializable]
    public class MovieState
    {
        public string StateName;
        public bool StateMovieIsloop;
        public int StartFrame;
        public int EndFrame;
        public delegate void StateBehaiver();
        public StateBehaiver Doing;
    }

    [SerializeField]
    protected List<MovieState> StateList;

    [SerializeField]
    protected MovieState currentMovieSate;

    protected DShowMoviePlayer movie;

    protected uint MovieFrame { set { movie.Frame = value; } get { return movie.Frame; } }

    protected Coroutine DoCurrentFramesCor = null;

    // Update is called once per frame
    protected void Update () {

        if (currentMovieSate.Doing != null)
            currentMovieSate.Doing();

        DoCurrentMovieFrame();
    }

    protected void SetState(MovieState movieState)
    {
        if (currentMovieSate == movieState)
            return;

        if (DoCurrentFramesCor != null)
            StopCoroutine(DoCurrentFramesCor);

        currentMovieSate = movieState;

        MovieFrame = (uint)currentMovieSate.StartFrame;
        if (MovieFrame != currentMovieSate.StartFrame)
        {
            DoCurrentFramesCor = StartCoroutine(DoCurrentStartFrame(currentMovieSate.StartFrame, MovieFrame > currentMovieSate.StartFrame));
        }

        movie.Play();
    }

    protected void DoCurrentMovieFrame()
    {
        if (currentMovieSate == null)
            return;
        if (MovieFrame >= currentMovieSate.EndFrame)
        {
            if (currentMovieSate.StateMovieIsloop)
            {
                MovieFrame = (uint)currentMovieSate.StartFrame;
                if (MovieFrame != currentMovieSate.StartFrame)
                {
                    if (DoCurrentFramesCor != null)
                        StopCoroutine(DoCurrentFramesCor);
                    DoCurrentFramesCor = StartCoroutine(DoCurrentStartFrame(currentMovieSate.StartFrame, MovieFrame > currentMovieSate.StartFrame));
                }
            }
            else
            {
                movie.Pause();
                MovieFrame = (uint)currentMovieSate.EndFrame;
            }
        }
        if (MovieFrame < currentMovieSate.StartFrame)
        {
            MovieFrame = (uint)currentMovieSate.StartFrame;
            if (MovieFrame != currentMovieSate.StartFrame)
            {
                if (DoCurrentFramesCor != null)
                    StopCoroutine(DoCurrentFramesCor);
                DoCurrentFramesCor = StartCoroutine(DoCurrentStartFrame(currentMovieSate.StartFrame, MovieFrame > currentMovieSate.StartFrame));
            }
        }

        if (!currentMovieSate.StateMovieIsloop)
            return;

        if (!movie.IsPlaying)
        {
            movie.Play();
        }
    }

    IEnumerator DoCurrentStartFrame(int currentFrame, bool isBigger)
    {
        float adjust_frame = 0;
        if (isBigger)
        {
            while (MovieFrame > (uint)(currentFrame + adjust_frame))
            {
                adjust_frame++;
                MovieFrame = (uint)(currentFrame + adjust_frame);
                if ((currentFrame + adjust_frame) > currentMovieSate.EndFrame)
                {
                    yield break;
                }
                yield return new WaitForSeconds(3.0f * movie.GetDuration / movie.TotalNumFrames);
            }
        }
        else
        {
            while (MovieFrame < (uint)(currentFrame + adjust_frame))
            {
                adjust_frame++;
                MovieFrame = (uint)(currentFrame + adjust_frame);
                if ((currentFrame + adjust_frame) > currentMovieSate.EndFrame)
                {
                    yield break;
                }

                yield return new WaitForSeconds(3.0f * movie.GetDuration / movie.TotalNumFrames);
            }
        }
        yield return null;
    }
}