using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using LitJson;
using SimpleHttpServer;
using Sog;

namespace Operation
{
    [MenuMapping(refc = typeof(SendEmail))]
    public static class DiffGameData
    {
        private const string BaseFilePath = "../cfg/";
        private const string BakFilePath = BaseFilePath + "data_bak/";

        [RequestMapping("历史数值对比查询", PermissionCode.SELECT_GAME_DATA_DIFF, true)]
        public static int OnGetDiffDirListHttpReq(string httpApiCmd, JsonData jsondata, HttpResponse rsp,
            HttpRequest request, HttpQueryParams query, uint httpContextId)
        {
            JsonData list = new JsonData();
            list.Add("data");
            if (!Directory.Exists(BakFilePath))
            {
                Directory.CreateDirectory(BakFilePath);
            }
            string[] subdirectories = Directory.GetDirectories(BakFilePath);
            foreach (var subdirectory in subdirectories)
            {
                var tar = subdirectory.Replace(BakFilePath, "");
                list.Add(tar);
            }

            jsondata["data"] = list;

            return 0;
        }


        [RequestMapping("版本内容对比", PermissionCode.SELECT_GAME_DATA_CONTEXT_DIFF, false)]
        public static int OnGetDiffContextListHttpReq(string httpApiCmd, JsonData jsondata, HttpResponse rsp,
            HttpRequest request, HttpQueryParams query, uint httpContextId)
        {
            var v1 = query.GetValue("v1");
            var v2 = query.GetValue("v2");
            var tableName = query.GetValue("table");
            if (v1 == v2)
            {
                jsondata["code"] = -1;
                jsondata["msg"] = "版本号错误";
                return -1;
            }

            var v1p = BaseFilePath + v1 + "/";
            if (v1 != "data")
            {
                v1p = BakFilePath + v1 + "/";
            }

            var v2p = BaseFilePath + v2 + "/";
            if (v2 != "data")
            {
                v2p = BakFilePath + v2 + "/";
            }

            var files1 = GetFiles(v1p);
            var files2 = GetFiles(v2p);

            // 比较两个目录的文件列表并找出差异
            var files = files1.Count() > files2.Count() ? files1 : files2;
            var diffFiles = new JsonData(); //存在差异的文件

            var exists = false;
            var data = new JsonData();
            foreach (var fileName in files)
            {
                var equal = FilesEqual(v1p + fileName, v2p + fileName);
                if (equal)
                {
                    continue;
                }

                diffFiles.Add(fileName);
                exists = true;

                var fullPath = v1p + fileName;
                if (!File.Exists(fullPath))
                {
                    continue;
                }

                //差异表格
                if (string.IsNullOrEmpty(tableName))
                {
                    continue;
                }

                if (!string.IsNullOrEmpty(tableName) && tableName != fileName)
                {
                    continue;
                }

                //差异表格内容
                var mgr = GameConfigMgr.Instance.GetConfigMgr(fileName);
                var c1 = GameData.GetData(jsondata, mgr);
                data["c1"] = c1;
                var fullPath2 = v2p + fileName;
                var mgr2 = (IConfigManager)Activator.CreateInstance(mgr.GetType());
                if (!File.Exists(fullPath2) || mgr2 == null) continue;
                var b2 = File.ReadAllBytes(fullPath2);
                mgr2.InitBin(fileName, b2);
                var c2 = GameData.GetData(jsondata, mgr2);
                data["c2"] = c2;
            }

            if (exists)
            {
                jsondata["tables"] = diffFiles;
            }

            if (!string.IsNullOrEmpty(tableName))
            {
                jsondata["data"] = data;
            }

            jsondata["ret"] = 0;
            jsondata["code"] = 0;
            return 0;
        }
        
        
        [RequestMapping("备份数值配置", PermissionCode.SELECT_GAME_DATA_BAK)]
        public static int OnBakGameDataHttpReq(string httpApiCmd, JsonData jsondata, HttpResponse rsp,
            HttpRequest request, HttpQueryParams query, uint httpContextId)
        {
            var version = query.GetValue("version");
            if (string.IsNullOrEmpty(version))
            {
                jsondata["msg"] = "版本号错误";
                jsondata["ret"] = -1;
                return 0;
            }

            var fullPath = BakFilePath + version;
            //文件夹存在
            if (Directory.Exists(fullPath))
            {
                jsondata["msg"] = "本版已存在";
                jsondata["ret"] = -1;
                return 0;
            }

            var ret = Directory.CreateDirectory(fullPath);
            if (!ret.Exists)
            {
                jsondata["msg"] = "创建失败";
                jsondata["ret"] = -1;
                return 0;
            }

            var targetPatch = BaseFilePath + "data/";
            var files = Directory.GetFiles(targetPatch);
            foreach (var file in files)
            {
                var fileName = Path.GetFileName(file);
                var targetFile = Path.Combine(fullPath, fileName);
                File.Copy(file, targetFile, true); // 第三个参数 true 表示覆盖目标文件夹下的同名文件
            }

            return 0;
        }




        private static IEnumerable<string> GetFiles(string directory)
        {
            // 获取目录下的所有文件路径
            return Directory.GetFiles(directory, "*.bin", SearchOption.AllDirectories)
                .Select(file => Path.GetRelativePath(directory, file));
        }

        private static bool FilesEqual(string filePath1, string filePath2)
        {
            if (!File.Exists(filePath1))
            {
                return false;
            }

            if (!File.Exists(filePath2))
            {
                return false;
            }

            var md5 = MD5.Create();
            var hash1 = GetFileHash(filePath1, md5);
            var hash2 = GetFileHash(filePath2, md5);

            return hash1 == hash2;
        }

        private static string GetFileHash(string path, MD5 md5)
        {
            var stream = File.OpenRead(path);
            var hashBytes = md5.ComputeHash(stream);
            stream.Close();
            return BitConverter.ToString(hashBytes).Replace("-", "").ToLowerInvariant();
        }
    }
}