#if UNITY_EDITOR
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using HotUpdate.UI;
using Newtonsoft.Json.Linq;
using UnityEditor;
using UnityEngine;
using UnityEngine.U2D;
using YooAsset.Editor;

namespace AIGame.EditorTools
{
    /// <summary>检查实际构建产物，防止 SBP 的旧 Prefab 依赖缓存重新带入原图像素。</summary>
    public static class UiAtlasBuildValidation
    {
        public sealed class BundleCheck
        {
            public string FileName;
            public long Bytes;
            public int SourceTextureCount;
        }

        public static BundleCheck[] Inspect(string packageDirectory)
        {
            string reportPath = Directory.GetFiles(packageDirectory, "*.report").Single();
            var report = JObject.Parse(File.ReadAllText(reportPath));
            string packageName = report["Summary"].Value<string>("BuildPackageName");
            bool uniqueNames = report["Summary"].Value<bool>("UniqueBundleName");
            var bundles = ((JArray)report["BundleInfos"]).ToDictionary(b => b.Value<string>("BundleName"));
            var checks = new List<BundleCheck>();
            foreach (string guid in AssetDatabase.FindAssets("l:" + UiSpriteAtlasGenerator.GeneratedLabel,
                new[] { UiAtlasPaths.AtlasRoot }))
            {
                string atlasPath = AssetDatabase.GUIDToAssetPath(guid);
                if (AssetDatabase.LoadAssetAtPath<SpriteAtlas>(atlasPath) == null) continue;
                string bundleName = new PackUiAtlas().GetPackRuleResult(
                    new BundlePackRuleData(atlasPath, UiAtlasPaths.AtlasRoot, "UI", "")).GetBundleName(packageName, uniqueNames);
                if (!bundles.TryGetValue(bundleName, out var info))
                    throw new InvalidOperationException("Generated UI atlas missing from build report: " + atlasPath);
                string fileName = info.Value<string>("FileName");
                string path = Path.Combine(packageDirectory, fileName);
                var bundle = AssetBundle.LoadFromFile(path);
                if (bundle == null) throw new IOException("Cannot validate UI atlas bundle: " + path);
                try
                {
                    // 已剥离的源图仍有 Sprite 元数据，但不应再有可加载的原图 Texture2D。
                    checks.Add(new BundleCheck { FileName = fileName, Bytes = new FileInfo(path).Length,
                        SourceTextureCount = bundle.LoadAllAssets<Texture2D>().Length });
                }
                finally { bundle.Unload(true); }
            }
            if (checks.Count == 0) throw new InvalidOperationException("No generated UI atlas bundles validated.");
            return checks.ToArray();
        }
    }
}
#endif