// ***********************************************************************
// Assembly         : Unity
// Author           : HJ
// Created          : 2019-07-25
// Description      :
// Last Modified By : 
// Last Modified On : 
// ***********************************************************************
// <copyright file= "AutoCreateAtlas" company="DefaultCompany"></copyright>
// <summary></summary>
// ***********************************************************************
using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;
using System.IO;
using System.Text.RegularExpressions;
using UnityEditor.U2D;
using UnityEngine.U2D;

public class AutoCreateAtlas : Editor
{
    private const string ATLAS_PATH = "Assets/Ryff/Arts/Textures/Atlas";
    private const string TEXTURE_PATH = "Assets/Ryff/Arts/Textures/UI";

    [MenuItem("Game/图集处理")]
    public static void CreateAtlas()
    {
        var rootDirInfo = new DirectoryInfo(TEXTURE_PATH);
        var spts = new List<Sprite>();        
        
        foreach (DirectoryInfo dirInfo in rootDirInfo.GetDirectories())
        {
            //spts.Clear();
            //foreach (FileInfo pngFile in dirInfo.GetFiles("*.png", SearchOption.AllDirectories))
            //{
            //    string allPath = pngFile.FullName;
            //    string assetPath = allPath.Substring(allPath.IndexOf("Assets"));
            //    Sprite sprite = AssetDatabase.LoadAssetAtPath<Sprite>(assetPath);
            //    if (IsPackable(sprite) && !ContainChinese(sprite.name))
            //        spts.Add(sprite);
            //}
            string atlasName = dirInfo.Name + ".spriteatlas";
            var atlasPath = CreateAtlas(string.Format("{0}/{1}", ATLAS_PATH, atlasName));
            var sptAtlas = AssetDatabase.LoadAssetAtPath<SpriteAtlas>(atlasPath);
            Debug.Log(sptAtlas.tag);
            var obj = AssetDatabase.LoadAssetAtPath<Object>(string.Format("{0}/{1}",TEXTURE_PATH, dirInfo.Name));
            var fileinfo = Directory.GetFiles(string.Format("{0}/{1}", TEXTURE_PATH, dirInfo.Name));
            if (sptAtlas.GetPackables().Length == 0)
            {
                sptAtlas.Add(new Object[] { obj });
            }
            else
            {
                foreach (var item in sptAtlas.GetPackables())
                {
                    if (obj.name != item.name)
                    {
                        sptAtlas.Add(new Object[] { obj });
                    }
                }
            }
        }
        SpriteAtlasUtility.PackAllAtlases(BuildTarget.StandaloneWindows);
        AssetDatabase.SaveAssets();
    }


    private static bool IsPackable(Object o)
    {
        return o != null && (o.GetType() == typeof(Sprite) || o.GetType() == typeof(Texture2D) || (o.GetType() == typeof(DefaultAsset) && ProjectWindowUtil.IsFolder(o.GetInstanceID())));
    }

    private static string  CreateAtlas(string atlasPath)
    {
        if (!File.Exists(atlasPath))
        {
            if (!Directory.Exists(ATLAS_PATH))
            {
                Directory.CreateDirectory(ATLAS_PATH);
            }
            var tempAtlas = new SpriteAtlas();
            AssetDatabase.CreateAsset(tempAtlas, atlasPath);
            AssetDatabase.SaveAssets();
        }
        return atlasPath;
    }

    static bool ContainChinese(string input)
    {
        string pattern = "[\u4e00-\u9fbb]";
        return Regex.IsMatch(input, pattern);
    }

}