using UnityEngine;

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

using Object = UnityEngine.Object;

public class SpriteInfo
{
    #region 变量

    public float Width;
    public float Height;
    public string Name;
    public Sprite Sprite;
    public List<Vector2> UvList;

    #endregion
}

public class SpriteAsset : MonoBehaviour
{
    #region 变量

    public static Dictionary<string, SpriteInfo> SpriteInfoDic
    {
        get
        {
            if (_SpriteInfoDic == null)
            {
                GetSpriteInfo();
            }

            return _SpriteInfoDic;
        }
        set { _SpriteInfoDic = value; }
    }

    public static Dictionary<string, SpriteInfo> _SpriteInfoDic;

    #endregion

    public static void GetSpriteInfo()
    {
        Object[] objects = Resources.LoadAll("Sprite/SpriteUI/Atlas");

        Texture2D texture = Resources.Load<Texture2D>("Sprite/SpriteUI/Atlas");

        _SpriteInfoDic = new Dictionary<string, SpriteInfo>();

        for (int i = 0; i < objects.Length; i++)
        {
            if (objects[i] is Sprite)
            {
                Sprite sprite = (Sprite)objects[i];
                SpriteInfo spriteInfo = new SpriteInfo();

                spriteInfo.Sprite = sprite;
                spriteInfo.Name = sprite.name;
                spriteInfo.Width = sprite.rect.width;
                spriteInfo.Height = sprite.rect.height;

                float width = texture.width;
                float height = texture.height;

                Vector2 llUv = new Vector2(sprite.rect.xMin / width, sprite.rect.yMin / height);
                Vector2 ulUv = new Vector2(sprite.rect.xMin / width, sprite.rect.yMax / height);
                Vector2 urUv = new Vector2(sprite.rect.xMax / width, sprite.rect.yMax / height);
                Vector2 lrUv = new Vector2(sprite.rect.xMax / width, sprite.rect.yMin / height);

                spriteInfo.UvList = new List<Vector2>();
                spriteInfo.UvList.Add(ulUv);
                spriteInfo.UvList.Add(urUv);
                spriteInfo.UvList.Add(lrUv);
                spriteInfo.UvList.Add(llUv);
                
                _SpriteInfoDic.Add(spriteInfo.Name, spriteInfo);
            }
        }
    }
}