using System;
using System.Collections.Generic;
using System.IO;
using GFGEditor;
using GFGGame;
using UnityEditor;
using UnityEngine;

namespace VEngine.Editor.Builds
{
    public class BuildTask
    {
        private readonly string[] EXCLUDE_EXTS = new string[] { ".meta", ".bat" };
        private readonly string[] EXCLUDE_DIRS = new string[] { "Assets/Res/.svn", ImportArtResTool.Md5FilePath };
        private readonly BuildAssetBundleOptions buildAssetBundleOptions;
        private readonly List<Asset> bundledAssets = new List<Asset>();
        private readonly string bundleExtension;
        public readonly string name;
        private readonly Dictionary<string, Asset> pathWithAssets = new Dictionary<string, Asset>();

        public BuildTask()
        {
            name = nameof(Manifest);
            buildAssetBundleOptions = BuildAssetBundleOptions.ChunkBasedCompression |
                                      BuildAssetBundleOptions.AppendHashToAssetBundleName;
            bundleExtension = ".unity3d";
        }

        public Record record { get; private set; }

        private static string GetRecordsPath(string buildName)
        {
            return Settings.GetBuildPath($"build_records_for_{buildName}.json");
        }


        private static void WriteRecord(Record record)
        {
            var records = GetRecords(record.build);
            records.data.Insert(0, record);
            File.WriteAllText(GetRecordsPath(record.build), JsonUtility.ToJson(records));
        }

        private static Records GetRecords(string build)
        {
            var records = ScriptableObject.CreateInstance<Records>();
            var path = GetRecordsPath(build);
            if (File.Exists(path)) JsonUtility.FromJsonOverwrite(File.ReadAllText(path), records);

            return records;
        }

        private static void DisplayProgressBar(string title, string content, int index, int max)
        {
            EditorUtility.DisplayProgressBar($"{title}({index}/{max}) ", content,
                index * 1f / max);
        }

        public void BuildBundles()
        {
            var assetBundleNames = AssetDatabase.GetAllAssetBundleNames();
            for (var i = 0; i < assetBundleNames.Length; i++)
            {
                var assetBundleName = assetBundleNames[i];
                DisplayProgressBar("采集资源", assetBundleName, i, assetBundleNames.Length);
                var assetNames = AssetDatabase.GetAssetPathsFromAssetBundle(assetBundleName);
                bundledAssets.AddRange(Array.ConvertAll(assetNames, input => new Asset
                {
                    path = input,
                    bundle = assetBundleName
                }));
            }

            CheckAssets();
            EditorUtility.ClearProgressBar();
            FinishBuild();
        }

        public void BuildCustomBundles(string[] resRootDirNames, string setName)
        {
            List<string> hideFilePathList = new List<string>();
            List<string> hideDirPahtList = new List<string>();
            //换装资源打包屏蔽
            SqliteController.Instance.dirPath = Path.Combine(Environment.CurrentDirectory, ResPathUtil.CONFIG_DIR_PATH);
            SqliteController.Instance.Init(false, null);
            var dressUpItemList = ItemCfgArray.Instance.GetCfgsByitemType(ConstItemType.DRESS_UP);
            foreach (var itemCfg in dressUpItemList)
            {
                if (itemCfg.isHide <= 0)
                {
                    continue;
                }
                if (!string.IsNullOrEmpty(itemCfg.resLayer1))
                {
                    HideItemRes(itemCfg, 1, hideFilePathList, hideDirPahtList);
                }
                if (!string.IsNullOrEmpty(itemCfg.resLayer2))
                {
                    HideItemRes(itemCfg, 2, hideFilePathList, hideDirPahtList);
                }
                if (!string.IsNullOrEmpty(itemCfg.resLayer3))
                {
                    HideItemRes(itemCfg, 3, hideFilePathList, hideDirPahtList);
                }
            }
            //套装动作资源打包屏蔽
            var suitCfgs = SuitCfgArray.Instance.dataArray;
            foreach(var suitCfg in suitCfgs)
            {
                HideSuitActionRes(suitCfg, hideFilePathList, hideDirPahtList);
            }
            //卡牌资源打包屏蔽
            //var cardCfgs = ItemCfgArray.Instance.GetCfgsByitemType(ConstItemType.CARD);
            //foreach(var itemCfg in cardCfgs)
            //{
            //    HideCardRes(itemCfg, hideFilePathList, hideDirPahtList);
            //}

            foreach (var resRootDirName in resRootDirNames)
            {
                CreateBundles(resRootDirName, setName, hideFilePathList, hideDirPahtList);
            }
            CheckAssets();
            EditorUtility.ClearProgressBar();
            FinishBuild();
        }

        private void HideItemRes(ItemCfg itemCfg, int layerId, List<string> hideFilePathList, List<string> hideDirPahtList)
        {
            string res = DressUpUtil.GetDressUpItemLayerRes(itemCfg, layerId);
            //部件图
            var resPath = ResPathUtil.GetDressUpPath(res, ItemUtil.GetItemResExt(itemCfg.itemType, itemCfg.subType));
            hideFilePathList.Add(resPath);
            //动画
            resPath = ResPathUtil.GetDressUpAnimationDirPath(res);
            hideDirPahtList.Add(resPath);
            //特效
            resPath = ResPathUtil.GetDressUpEffectDirPath(res);
            hideDirPahtList.Add(resPath);
            resPath = ResPathUtil.GetDressUpEffectDirPath(res, true);
            hideDirPahtList.Add(resPath);
        }

        private void HideSuitActionRes(SuitCfg suitCfg, List<string> hideFilePathList, List<string> hideDirPahtList)
        {
            if(suitCfg.isHide <= 0)
            {
                return;
            }
            string resPath;
            //动画
            if(!string.IsNullOrEmpty(suitCfg.aniRes))
            {
                resPath = ResPathUtil.GetDressUpAnimationDirPath(suitCfg.aniRes);
                hideDirPahtList.Add(resPath);
            }
            //特效
            if (!string.IsNullOrEmpty(suitCfg.effRes))
            {
                resPath = ResPathUtil.GetDressUpEffectDirPath(suitCfg.effRes);
                hideDirPahtList.Add(resPath);
                resPath = ResPathUtil.GetDressUpEffectDirPath(suitCfg.effRes, true);
                hideDirPahtList.Add(resPath);
            }
        }

        //private void HideCardRes(ItemCfg itemCfg, List<string> hideFilePathList, List<string> hideDirPahtList)
        //{
        //    //大图
        //    var resPath = ResPathUtil.GetCardPath(itemCfg.res);
        //    hideFilePathList.Add(resPath); 
        //    //小图
        //    resPath = ResPathUtil.GetCardSmallPath(itemCfg.res);
        //    hideFilePathList.Add(resPath);
        //    //动画
        //    resPath = ResPathUtil.GetCardAnimationDirPath(itemCfg.res);
        //    hideDirPahtList.Add(resPath);
        //    //特效
        //    //to do...暂时没有
        //}

        private void CreateBundles(string resRootDirName, string setName, List<string> hideFilePathList, List<string> hideDirPahtList)
        {
            var path = Path.Combine(Application.dataPath, resRootDirName);
            var buildSetting = GFGEditor.BuildSetting.GetBuildSetting(setName);
            var dirBundleList = buildSetting.dirBundleList;
            var excludeDirs = buildSetting.dirBundleList.GetRange(0, buildSetting.dirBundleList.Count);
            excludeDirs.AddRange(EXCLUDE_DIRS);
            GFGEditor.FileUtil.ForeachFileInDir(path, excludeDirs, (string file) =>
            {
                var ext = Path.GetExtension(file);
                if (Array.IndexOf(EXCLUDE_EXTS, ext) < 0)
                {
                    file = file.Replace('\\', '/');
                    string curDir = Environment.CurrentDirectory.Replace("\\", "/");
                    string filePath = file.Replace(curDir + "/", "");
                    if(hideFilePathList.Contains(filePath))
                    {
                        return;
                    }
                    EditorUtility.DisplayProgressBar("采集资源", filePath, 1f);
                    var bundle = filePath.Replace($"Assets/{resRootDirName}/", "");

                    bundle = bundle.Replace('/', '_');
                    var i = bundle.IndexOf(".");
                    bundle = bundle.Substring(0, i);
                    bundle = bundle.ToLower();

                    //以文件名标识分组
                    for (int j = 0; j < buildSetting.dirTypeList.Count; j++)
                    {
                        string str = buildSetting.dirTypeList[j];
                        if (bundle.IndexOf(str) >= 0)
                        {
                            bundle = str.Substring(0, str.Length - 1);
                            break;
                        }
                    }
                    bundledAssets.Add(new Asset
                    {
                        path = filePath,
                        bundle = bundle
                    });
                }

            });
            //以子文件夹为单位分组
            foreach (var dir in dirBundleList)
            {
                var dirPath = Path.Combine(Environment.CurrentDirectory, dir);
                if (!GFGEditor.FileUtil.CheckPathInParent(dirPath, path))
                {
                    continue;
                }
                GFGEditor.FileUtil.ForeachDirInDir(dirPath, (string subDirPath) =>
                {
                    var targetDirPath = subDirPath.Replace('\\', '/');
                    string curDirPath = Environment.CurrentDirectory.Replace("\\", "/");
                    string subDir = targetDirPath.Replace(curDirPath + "/", "");
                    if(hideDirPahtList.Contains(subDir))
                    {
                        return;
                    }
                    var bundle = subDir.Replace($"Assets/{resRootDirName}/", "");
                    bundle = bundle.Replace('/', '_');
                    bundle = bundle.ToLower();
                    GFGEditor.FileUtil.ForeachFileInDir(subDirPath, null, (string file) =>
                    {
                        file = file.Replace('\\', '/');
                        string curDir = Environment.CurrentDirectory.Replace("\\", "/");
                        string filePath = file.Replace(curDir + "/", "");
                        EditorUtility.DisplayProgressBar("采集资源", filePath, 1f);
                        bundledAssets.Add(new Asset
                        {
                            path = filePath,
                            bundle = bundle
                        });

                    });
                });
            }
        }

        private void CheckAssets()
        {
            for (var i = 0; i < bundledAssets.Count; i++)
            {
                var asset = bundledAssets[i];
                //去重
                if (!pathWithAssets.TryGetValue(asset.path, out var ba))
                {
                    pathWithAssets[asset.path] = asset;
                }
                else
                {
                    bundledAssets.RemoveAt(i);
                    i--;
                    Debug.LogWarningFormat("{0} can't pack with {1}, because already pack to {2}", asset.path,
                        asset.bundle, ba.bundle);
                }
            }
        }

        private void FinishBuild()
        {
            var bundles = new List<ManifestBundle>();
            var dictionary = new Dictionary<string, List<string>>();
            //分组
            foreach (var asset in bundledAssets)
            {
                if (!dictionary.TryGetValue(asset.bundle, out var assets))
                {
                    assets = new List<string>();
                    dictionary.Add(asset.bundle, assets);
                    bundles.Add(new ManifestBundle
                    {
                        name = asset.bundle,
                        assets = assets
                    });
                }

                assets.Add(asset.path);
            }

            var unityBuildPath = Settings.PlatformBuildPath;
            if (!string.IsNullOrEmpty(GFGGame.LauncherConfig.resKey))
            {
                unityBuildPath = Settings.UnityBuildPath;
            }
            if (bundles.Count <= 0) return;
            var manifest = BuildPipeline.BuildAssetBundles(unityBuildPath, bundles.ConvertAll(bundle =>
                    new AssetBundleBuild
                    {
                        assetNames = bundle.assets.ToArray(),
                        assetBundleName = bundle.name
                    }).ToArray(),
                buildAssetBundleOptions | BuildAssetBundleOptions.AppendHashToAssetBundleName,
                EditorUserBuildSettings.activeBuildTarget);

            if (manifest == null)
            {
                Debug.LogErrorFormat("Failed to build {0}.", name);
                return;
            }
            //if (!string.IsNullOrEmpty(GFGGame.LauncherConfig.resKey))
            //{
            //    string buildPath = Settings.PlatformBuildPath;
            //    CreateEncryptAssets(unityBuildPath, buildPath, manifest, GFGGame.LauncherConfig.resKey);
            //}
            AfterBuildBundles(bundles, manifest);
        }


        /// <summary>
        /// 创建加密的AssetBundle
        /// </summary>
        //public static void CreateEncryptAssets(string bundlePackagePath, string encryptAssetPath, AssetBundleManifest manifest, string secretKey)
        //{
        //    if (!Directory.Exists(encryptAssetPath))
        //    {
        //        Directory.CreateDirectory(encryptAssetPath);
        //    }
        //    string[] assetBundles = manifest.GetAllAssetBundles();
        //    foreach (string assetBundle in assetBundles)
        //    {
        //        string bundlePath = Path.Combine(bundlePackagePath, assetBundle);
        //        byte[] encryptBytes = EncryptHelper.CreateEncryptData(bundlePath, secretKey);
        //        using (FileStream fs = new FileStream(Path.Combine(encryptAssetPath, assetBundle), FileMode.OpenOrCreate))
        //        {
        //            fs.SetLength(0);
        //            fs.Write(encryptBytes, 0, encryptBytes.Length);
        //        }
        //    }
        //}

        /// <summary>
        /// 创建加密的AssetBundle
        /// </summary>
        public static void CreateEncryptAsset(string unityBundlesPath, string bundlesPath, string unityBundle, string secretKey)
        {
            if (!Directory.Exists(bundlesPath))
            {
                Directory.CreateDirectory(bundlesPath);
            }
            string unityBundlePath = Path.Combine(unityBundlesPath, unityBundle);
            byte[] encryptBytes = EncryptHelper.CreateEncryptData(unityBundlePath, secretKey);
            using (FileStream fs = new FileStream(Path.Combine(bundlesPath, unityBundle), FileMode.OpenOrCreate))
            {
                fs.SetLength(0);
                fs.Write(encryptBytes, 0, encryptBytes.Length);
            }
        }

        private string GetOriginBundle(string assetBundle)
        {
            var pos = assetBundle.LastIndexOf("_", StringComparison.Ordinal) + 1;
            var hash = assetBundle.Substring(pos);
            if (!string.IsNullOrEmpty(bundleExtension)) hash = hash.Replace(bundleExtension, "");

            var originBundle = $"{assetBundle.Replace("_" + hash, "")}";
            return originBundle;
        }

        private void AfterBuildBundles(List<ManifestBundle> bundles,
            AssetBundleManifest manifest)
        {
            var nameWithBundles = new Dictionary<string, ManifestBundle>();
            for (var i = 0; i < bundles.Count; i++)
            {
                var bundle = bundles[i];
                bundle.id = i;
                nameWithBundles[bundle.name] = bundle;
            }

            if (manifest != null)
            {
                var assetBundles = manifest.GetAllAssetBundles();
                foreach (var assetBundle in assetBundles)
                {
                    var originBundle = GetOriginBundle(assetBundle);
                    var dependencies = Array.ConvertAll(manifest.GetAllDependencies(assetBundle), GetOriginBundle);
                    if (nameWithBundles.TryGetValue(originBundle, out var manifestBundle))
                    {
                        manifestBundle.nameWithAppendHash = assetBundle;
                        manifestBundle.dependencies = Array.ConvertAll(dependencies, input => nameWithBundles[input].id);
                        
                    }
                    else
                    {
                        Debug.LogErrorFormat("Bundle not exist: {0}", originBundle);
                    }
                }
            }

            CreateManifest(bundles);
        }

        private void CreateManifest(List<ManifestBundle> bundles)
        {
            var manifest = Settings.GetManifest();
            manifest.version++;
            manifest.appVersion = UnityEditor.PlayerSettings.bundleVersion;
            var getBundles = manifest.GetBundles();
            var newFiles = new List<string>();
            var newSize = 0L;
            foreach (var bundle in bundles)
            {
                if (!getBundles.TryGetValue(bundle.name, out var value) ||
                    value.nameWithAppendHash != bundle.nameWithAppendHash)
                {
                    newFiles.Add(bundle.nameWithAppendHash);
                    if (!string.IsNullOrEmpty(GFGGame.LauncherConfig.resKey))
                    {
                        string buildPath = Settings.PlatformBuildPath;
                        CreateEncryptAsset(Settings.UnityBuildPath, buildPath, bundle.nameWithAppendHash, GFGGame.LauncherConfig.resKey);
                    }
                }
                var file = Settings.GetBuildPath(bundle.nameWithAppendHash);
                if (File.Exists(file))
                    using (var stream = File.OpenRead(file))
                    {
                        bundle.size = stream.Length;
                        bundle.crc = Utility.ComputeCRC32(stream);
                    }
                else
                    Debug.LogErrorFormat("File not found: {0}", file);
                newSize += bundle.size;
            }
                

            manifest.bundles = bundles;
            var newFilesSize = Utility.FormatBytes(newSize);
            newFiles.AddRange(WriteManifest(manifest));
            // write upload files
            var filename = Settings.GetBuildPath($"upload_files_for_{manifest.name}_{manifest.version}.txt");
            File.WriteAllText(filename, string.Join("\n", newFiles.ToArray()));
            record = new Record
            {
                build = name,
                version = manifest.version,
                files = newFiles,
                size = newSize,
                time = DateTime.Now.ToFileTime()
            };
            WriteRecord(record);
            Debug.LogFormat("Build bundles with {0}({1}) files with version {2} for {3}.", newFiles.Count, newFilesSize,
                manifest.version, manifest.name);
        }


        private static IEnumerable<string> WriteManifest(Manifest manifest)
        {
            var newFiles = new List<string>();
            var filename = $"{manifest.name}";
            var version = manifest.version;
            WriteJson(manifest, filename, newFiles);
            var path = Settings.GetBuildPath(filename);
            var crc = Utility.ComputeCRC32(path);
            var info = new FileInfo(path);
            WriteJson(manifest, $"{filename}_v{version}_{crc}", newFiles);
            // for version file
            var manifestVersion = ScriptableObject.CreateInstance<ManifestVersion>();
            manifestVersion.crc = crc;
            manifestVersion.size = info.Length;
            manifestVersion.version = version;
            manifestVersion.appVersion = manifest.appVersion;
            WriteJson(manifestVersion, Manifest.GetVersionFile(filename), newFiles);
            WriteJson(manifestVersion, $"{filename}_v{version}_{crc}.version", newFiles);
            return newFiles;
        }

        private static void WriteJson(ScriptableObject so, string file, List<string> newFiles)
        {
            newFiles.Add(file);
            var json = JsonUtility.ToJson(so);
            File.WriteAllText(Settings.GetBuildPath(file), json);
        }
    }
}