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

[ExecuteInEditMode]
[RequireComponent(typeof(MoviePlayerBase))]
public class MovieTextureApply : MonoBehaviour {
    public enum Target
    {
        RawImage,
        Image,
        Material
    }

    public Target target = Target.Image;
    public List<Material> materials = new List<Material>();
    public string attributeName;
    Texture oddVideTexture;
    Dictionary<Target, Action> updater_map = new Dictionary<Target, Action>();
    //bool inited = false;
    public bool autoSize = false;
    Action updater = null;

    // Use this for initialization
    void Start () {

        updater_map = new Dictionary<Target, Action>() {
            { Target.RawImage, UpdateRawImage },
            { Target.Material, UpdateMaterial },
            { Target.Image, UpdateImage },
        };

        if(updater_map.ContainsKey(target))
            updater = updater_map[target];

        //Debug.LogWarning("Implement editor code for better usage.");

	}
	
	// Update is called once per frame
	void Update () {
        if (updater != null)
            updater();
    }

    void UpdateRawImage()
    {
        //if(inited == false)
        {
            MoviePlayerBase movie = GetComponent<MoviePlayerBase>();
            RawImage img = GetComponent<RawImage>();
            if(movie.Texture != oddVideTexture)
            {
                img.texture = oddVideTexture =  movie.Texture;
                if (autoSize)
                    GetComponent<RectTransform>().sizeDelta = new Vector2(oddVideTexture.width, oddVideTexture.height);
                //inited = true;
            }
        }
    }

    public bool showWarnning()
    {
        if (GetComponent<Image>() == null || target != Target.Image)
            return false;

        if (GetComponent<Image>().material.name != "Default UI Material")
            return true;

        return false;
    }

    void UpdateImage()
    {
        MoviePlayerBase movie = GetComponent<MoviePlayerBase>();
        Image img = GetComponent<Image>();
        if (movie.Texture != oddVideTexture && movie.Texture != null)
        {
            img.material.mainTexture = oddVideTexture = movie.Texture;
            if (autoSize)
                GetComponent<RectTransform>().sizeDelta = new Vector2(oddVideTexture.width, oddVideTexture.height);
        }
    }


    void UpdateMaterial()
    {
        //if (inited == false)
        {
            MoviePlayerBase movie = GetComponent<MoviePlayerBase>();
            if (movie.Texture != oddVideTexture)
            {
                oddVideTexture = movie.Texture;
                foreach (var m in materials)
                {
                    m.SetTexture(attributeName, movie.Texture);
                }
                //inited = true;
            }
        }
    }

}