using System;
using UnityEditor;
using UnityEngine;

namespace AibisDream.Framework
{
    public static class ResourceKit
    {
        public static string SavePsdSprite(Sprite sprite)
        {
            if (!sprite) return "";
            
            // 先读Psd的路径
            string psdPath = AssetDatabase.GetAssetPath(sprite);
            var psdResPath = GetResourcePath(psdPath);
            // 去后缀
            // 找到最后一个点的位置
            int lastDotIndex = psdResPath.LastIndexOf('.');
            // 如果没有点，说明没有扩展名
            if (lastDotIndex == -1)
            {
                return psdResPath;
            }

            // 提取文件名（不包括扩展名）
            var purePath = psdResPath.Substring(0, lastDotIndex);
            
            // 添加后缀
            return purePath + "/" + sprite.name;
        }

        private static string GetResourcePath(string absolutePath)
        {
            const string resourcesFolderName = "Resources/";
            int index = absolutePath.IndexOf(resourcesFolderName, StringComparison.Ordinal);

            if (index >= 0)
            {
                // 获取 "Resources/" 之后的部分
                return absolutePath.Substring(index + resourcesFolderName.Length);
            }
            else
            {
                return absolutePath;
            }
        }

        public static Sprite LoadSpriteFromPsd(string path)
        {
            int lastIndex = path.LastIndexOf('/');
            string spriteName = path.Substring(lastIndex + 1);
            string resPath = path.Substring(0, lastIndex);
            
            // 加载
            var sprites = Resources.LoadAll<Sprite>(resPath);

            foreach (var sprite in sprites)
            {
                if (sprite.name == spriteName)
                {
                    return sprite;
                }
            }

            return null;
        }
    }
}