// Admin.NET 项目的版权、商标、专利和其他相关权利均受相应法律法规的保护。使用本项目应遵守相关法律法规和许可证的要求。
//
// 本项目主要遵循 MIT 许可证和 Apache 许可证（版本 2.0）进行分发和使用。许可证位于源代码树根目录中的 LICENSE-MIT 和 LICENSE-APACHE 文件。
//
// 不得利用本项目从事危害国家安全、扰乱社会秩序、侵犯他人合法权益等法律法规禁止的活动！任何基于本项目二次开发而产生的一切法律纠纷和责任，我们不承担任何责任！

using Npgsql;

namespace Admin.NET.Core.Service;

/// <summary>
/// 系统数据库管理服务 🧩
/// </summary>
[ApiDescriptionSettings(Order = 250, Description = "数据库管理")]
public class SysDatabaseService : IDynamicApiController, ITransient
{
    private readonly UserManager _userManager;
    private readonly ISqlSugarClient _db;
    private readonly IViewEngine _viewEngine;
    private readonly CodeGenOptions _codeGenOptions;
    private readonly CodeGenStrategyFactory _codeGenStrategyFactory;

    public SysDatabaseService(UserManager userManager,
        ISqlSugarClient db,
        IViewEngine viewEngine,
        IOptions<CodeGenOptions> codeGenOptions,
        CodeGenStrategyFactory codeGenStrategyFactory)
    {
        _userManager = userManager;
        _db = db;
        _viewEngine = viewEngine;
        _codeGenOptions = codeGenOptions.Value;
        _codeGenStrategyFactory = codeGenStrategyFactory;
    }

    /// <summary>
    /// 增加列 🔖
    /// </summary>
    /// <param name="input"></param>
    [ApiDescriptionSettings(Name = "AddColumn"), HttpPost]
    [DisplayName("增加列")]
    public void AddColumn(DbColumnInput input)
    {
        var column = new DbColumnInfo
        {
            ColumnDescription = input.ColumnDescription,
            DbColumnName = input.DbColumnName,
            IsIdentity = input.IsIdentity == 1,
            IsNullable = input.IsNullable == 1,
            IsPrimarykey = input.IsPrimarykey == 1,
            Length = input.Length,
            DecimalDigits = input.DecimalDigits,
            DataType = input.DataType
        };
        var db = _db.AsTenant().GetConnectionScope(input.ConfigId);
        db.DbMaintenance.AddColumn(input.TableName, column);
        // 添加默认值
        if (!string.IsNullOrWhiteSpace(input.DefaultValue))
            db.DbMaintenance.AddDefaultValue(input.TableName, column.DbColumnName, input.DefaultValue);
        db.DbMaintenance.AddColumnRemark(input.DbColumnName, input.TableName, input.ColumnDescription);
        if (column.IsPrimarykey)
            db.DbMaintenance.AddPrimaryKey(input.TableName, input.DbColumnName);
    }

    /// <summary>
    /// 删除列 🔖
    /// </summary>
    /// <param name="input"></param>
    [ApiDescriptionSettings(Name = "DeleteColumn"), HttpPost]
    [DisplayName("删除列")]
    public void DeleteColumn(DeleteDbColumnInput input)
    {
        var db = _db.AsTenant().GetConnectionScope(input.ConfigId);
        db.DbMaintenance.DropColumn(input.TableName, input.DbColumnName);
    }

    /// <summary>
    /// 编辑列 🔖
    /// </summary>
    /// <param name="input"></param>
    [ApiDescriptionSettings(Name = "UpdateColumn"), HttpPost]
    [DisplayName("编辑列")]
    public void UpdateColumn(UpdateDbColumnInput input)
    {
        var db = _db.AsTenant().GetConnectionScope(input.ConfigId);
        db.DbMaintenance.RenameColumn(input.TableName, input.OldColumnName, input.ColumnName);
        if (!string.IsNullOrWhiteSpace(input.DefaultValue))
            db.DbMaintenance.AddDefaultValue(input.TableName, input.ColumnName, input.DefaultValue);
        if (db.DbMaintenance.IsAnyColumnRemark(input.ColumnName, input.TableName))
            db.DbMaintenance.DeleteColumnRemark(input.ColumnName, input.TableName);
        db.DbMaintenance.AddColumnRemark(input.ColumnName, input.TableName, string.IsNullOrWhiteSpace(input.Description) ? input.ColumnName : input.Description);
    }

    /// <summary>
    /// 移动列顺序 🔖
    /// </summary>
    /// <param name="input"></param>
    [DisplayName("移动列顺序")]
    public void MoveColumn(MoveDbColumnInput input)
    {
        var db = _db.AsTenant().GetConnectionScope(input.ConfigId);
        var dbMaintenance = db.DbMaintenance;

        var columns = dbMaintenance.GetColumnInfosByTableName(input.TableName, false);
        var targetColumn = columns.FirstOrDefault(u => u.DbColumnName.Equals(input.ColumnName, StringComparison.OrdinalIgnoreCase)) ?? throw new Exception($"列 {input.ColumnName} 在表 {input.TableName} 中不存在");

        var dbType = db.CurrentConnectionConfig.DbType;
        switch (dbType)
        {
            case SqlSugar.DbType.MySql:
                MoveColumnInMySQL(db, input.TableName, input.ColumnName, input.AfterColumnName);
                break;

            default:
                throw new NotSupportedException($"暂不支持 {dbType} 数据库的列移动操作");
        }
    }

    /// <summary>
    /// 获取列定义
    /// </summary>
    /// <param name="db"></param>
    /// <param name="tableName"></param>
    /// <param name="columnName"></param>
    /// <param name="noDefault"></param>
    /// <returns></returns>
    /// <exception cref="Exception"></exception>
    private string GetColumnDefinitionInMySQL(ISqlSugarClient db, string tableName, string columnName, bool noDefault = false)
    {
        var columnDef = db.Ado.SqlQuery<dynamic>($"SHOW FULL COLUMNS FROM `{tableName}` WHERE Field = '{columnName}'").FirstOrDefault() ?? throw new Exception($"Column {columnName} not found");

        var definition = new StringBuilder();
        definition.Append($"`{columnName}` ");  // 列名
        definition.Append($"{columnDef.Type} "); // 数据类型

        // 处理约束条件
        definition.Append(columnDef.Null == "YES" ? "NULL " : "NOT NULL ");
        if (columnDef.Default != null && !noDefault)
            definition.Append($"DEFAULT '{columnDef.Default}' ");
        if (!string.IsNullOrEmpty(columnDef.Extra))
            definition.Append($"{columnDef.Extra} ");
        if (!string.IsNullOrEmpty(columnDef.Comment))
            definition.Append($"COMMENT '{columnDef.Comment.Replace("'", "''")}'");

        return definition.ToString();
    }

    /// <summary>
    /// MySQL 列移动实现
    /// </summary>
    /// <param name="db"></param>
    /// <param name="tableName"></param>
    /// <param name="columnName"></param>
    /// <param name="afterColumnName"></param>
    private void MoveColumnInMySQL(ISqlSugarClient db, string tableName, string columnName, string afterColumnName)
    {
        var definition = GetColumnDefinitionInMySQL(db, tableName, columnName);
        var sql = new StringBuilder();
        sql.Append($"ALTER TABLE `{tableName}` MODIFY COLUMN {definition}");

        if (string.IsNullOrEmpty(afterColumnName))
            sql.Append(" FIRST");
        else
            sql.Append($" AFTER `{afterColumnName}`");

        db.Ado.ExecuteCommand(sql.ToString());
    }

    /// <summary>
    /// 增加表 🔖
    /// </summary>
    /// <param name="input"></param>
    [ApiDescriptionSettings(Name = "AddTable"), HttpPost]
    [DisplayName("增加表")]
    public void AddTable(DbTableInput input)
    {
        if (input.DbColumnInfoList == null || input.DbColumnInfoList.Count == 0)
            throw Oops.Oh(ErrorCodeEnum.db1000);

        if (input.DbColumnInfoList.GroupBy(u => u.DbColumnName).Any(u => u.Count() > 1))
            throw Oops.Oh(ErrorCodeEnum.db1002);

        var config = App.GetOptions<DbConnectionOptions>().ConnectionConfigs.FirstOrDefault(u => u.ConfigId.ToString() == input.ConfigId);
        var db = _db.AsTenant().GetConnectionScope(input.ConfigId);
        var typeBuilder = db.DynamicBuilder().CreateClass(input.TableName, new SugarTable() { TableName = input.TableName, TableDescription = input.Description });
        input.DbColumnInfoList.ForEach(u =>
        {
            var dbColumnName = config!.DbSettings.EnableUnderLine ? UtilMethods.ToUnderLine(u.DbColumnName.Trim()) : u.DbColumnName.Trim();
            // 虚拟类都默认string类型，具体以列数据类型为准
            typeBuilder.CreateProperty(dbColumnName, typeof(string), new SugarColumn()
            {
                IsPrimaryKey = u.IsPrimarykey == 1,
                IsIdentity = u.IsIdentity == 1,
                ColumnDataType = u.DataType,
                Length = u.Length,
                IsNullable = u.IsNullable == 1,
                DecimalDigits = u.DecimalDigits,
                ColumnDescription = u.ColumnDescription,
                DefaultValue = u.DefaultValue,
            });
        });
        db.CodeFirst.InitTables(typeBuilder.BuilderType());
    }

    /// <summary>
    /// 删除表 🔖
    /// </summary>
    /// <param name="input"></param>
    [ApiDescriptionSettings(Name = "DeleteTable"), HttpPost]
    [DisplayName("删除表")]
    public void DeleteTable(DeleteDbTableInput input)
    {
        var db = _db.AsTenant().GetConnectionScope(input.ConfigId);
        db.DbMaintenance.DropTable(input.TableName);
    }

    /// <summary>
    /// 编辑表 🔖
    /// </summary>
    /// <param name="input"></param>
    [ApiDescriptionSettings(Name = "UpdateTable"), HttpPost]
    [DisplayName("编辑表")]
    public void UpdateTable(UpdateDbTableInput input)
    {
        var db = _db.AsTenant().GetConnectionScope(input.ConfigId);
        db.DbMaintenance.RenameTable(input.OldTableName, input.TableName);
        try
        {
            if (db.DbMaintenance.IsAnyTableRemark(input.TableName))
                db.DbMaintenance.DeleteTableRemark(input.TableName);

            if (!string.IsNullOrWhiteSpace(input.Description))
                db.DbMaintenance.AddTableRemark(input.TableName, input.Description);
        }
        catch (NotSupportedException ex)
        {
            throw Oops.Oh(ex.ToString());
        }
    }

    /// <summary>
    /// 获取库列表 🔖
    /// </summary>
    /// <returns></returns>
    [DisplayName("获取库列表")]
    public List<DbOutput> GetList()
    {
        var dbOutputs = new List<DbOutput>();
        var configIds = App.GetOptions<DbConnectionOptions>().ConnectionConfigs.Select(u => u.ConfigId.ToString()).ToList();
        foreach (var config in configIds)
        {
            var db = _db.AsTenant().GetConnectionScope(config);
            dbOutputs.Add(new DbOutput
            {
                ConfigId = config,
                DbName = db.Ado.Connection.Database
            });
        }
        return dbOutputs;
    }

    /// <summary>
    /// 获取表列表 🔖
    /// </summary>
    /// <param name="configId">ConfigId</param>
    /// <returns></returns>
    [DisplayName("获取表列表")]
    public List<DbTableInfo> GetTableList(string configId = SqlSugarConst.MainConfigId)
    {
        var db = _db.AsTenant().GetConnectionScope(configId);
        return db.DbMaintenance.GetTableInfoList(false);
    }

    /// <summary>
    /// 获取字段列表 🔖
    /// </summary>
    /// <param name="tableName">表名</param>
    /// <param name="configId">ConfigId</param>
    /// <returns></returns>
    [DisplayName("获取字段列表")]
    public List<DbColumnOutput> GetColumnList(string tableName, string configId = SqlSugarConst.MainConfigId)
    {
        if (string.IsNullOrWhiteSpace(tableName)) return [];

        var db = _db.AsTenant().GetConnectionScope(configId);
        return db.DbMaintenance.GetColumnInfosByTableName(tableName, false).Adapt<List<DbColumnOutput>>();
    }

    /// <summary>
    /// 获取数据库数据类型列表 🔖
    /// </summary>
    /// <param name="configId"></param>
    /// <returns></returns>
    [DisplayName("获取数据库数据类型列表")]
    public List<string> GetDbTypeList(string configId = SqlSugarConst.MainConfigId)
    {
        var db = _db.AsTenant().GetConnectionScope(configId);
        return db.DbMaintenance.GetDbTypes().OrderBy(u => u).ToList();
    }

    /// <summary>
    /// 获取可视化库表结构 🔖
    /// </summary>
    /// <returns></returns>
    [DisplayName("获取可视化库表结构")]
    public VisualDbTable GetVisualDbTable()
    {
        var visualTableList = new List<VisualTable>();
        var visualColumnList = new List<VisualColumn>();
        var columnRelationList = new List<ColumnRelation>();
        var dbOptions = App.GetOptions<DbConnectionOptions>().ConnectionConfigs.First(u => u.ConfigId.ToString() == SqlSugarConst.MainConfigId);

        // 遍历所有实体获取所有库表结构
        var random = new Random();
        var entityTypes = App.EffectiveTypes.Where(u => !u.IsInterface && !u.IsAbstract && u.IsClass && u.IsDefined(typeof(SugarTable), false)).ToList();
        foreach (var entityType in entityTypes)
        {
            var entityInfo = _db.EntityMaintenance.GetEntityInfoNoCache(entityType);

            var visualTable = new VisualTable
            {
                TableName = entityInfo.DbTableName,
                TableComents = entityInfo.TableDescription + entityInfo.DbTableName,
                X = random.Next(5000),
                Y = random.Next(5000)
            };
            visualTableList.Add(visualTable);

            foreach (EntityColumnInfo columnInfo in entityInfo.Columns)
            {
                var visualColumn = new VisualColumn
                {
                    TableName = columnInfo.DbTableName,
                    ColumnName = dbOptions.DbSettings.EnableUnderLine ? UtilMethods.ToUnderLine(columnInfo.DbColumnName) : columnInfo.DbColumnName,
                    DataType = columnInfo.PropertyInfo.PropertyType.Name,
                    DataLength = columnInfo.Length.ToString(),
                    ColumnDescription = columnInfo.ColumnDescription,
                };
                visualColumnList.Add(visualColumn);

                // 根据导航配置获取表之间关联关系
                if (columnInfo.Navigat != null)
                {
                    var name1 = columnInfo.Navigat.GetName();
                    var name2 = columnInfo.Navigat.GetName2();
                    var targetColumnName = string.IsNullOrEmpty(name2) ? "Id" : name2;
                    var relation = new ColumnRelation
                    {
                        SourceTableName = columnInfo.DbTableName,
                        SourceColumnName = dbOptions.DbSettings.EnableUnderLine ? UtilMethods.ToUnderLine(name1) : name1,
                        Type = columnInfo.Navigat.GetNavigateType() == NavigateType.OneToOne ? "ONE_TO_ONE" : "ONE_TO_MANY",
                        TargetTableName = dbOptions.DbSettings.EnableUnderLine ? UtilMethods.ToUnderLine(columnInfo.DbColumnName) : columnInfo.DbColumnName,
                        TargetColumnName = dbOptions.DbSettings.EnableUnderLine ? UtilMethods.ToUnderLine(targetColumnName) : targetColumnName
                    };
                    columnRelationList.Add(relation);
                }
            }
        }

        return new VisualDbTable { VisualTableList = visualTableList, VisualColumnList = visualColumnList, ColumnRelationList = columnRelationList };
    }

    /// <summary>
    /// 创建实体 🔖
    /// </summary>
    /// <param name="input"></param>
    [ApiDescriptionSettings(Name = "CreateEntity"), HttpPost]
    [DisplayName("创建实体")]
    public async Task CreateEntity(CreateEntityInput input)
    {
        var template = await GenerateEntity(input);
        await File.WriteAllTextAsync(template.OutPath, template.Context, Encoding.UTF8);
    }

    /// <summary>
    /// 创建实体文件内容
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    [ApiDescriptionSettings(Name = "GenerateEntity"), HttpPost]
    [DisplayName("创建实体文件内容")]
    public async Task<TemplateContextOutput> GenerateEntity(CreateEntityInput input)
    {
        var strategy = _codeGenStrategyFactory.GetStrategy<CreateEntityInput>(CodeGenSceneEnum.TableEntity);
        return (await strategy.GenerateCode(input))?.FirstOrDefault();
    }

    /// <summary>
    /// 创建种子数据 🔖
    /// </summary>
    /// <param name="input"></param>
    [ApiDescriptionSettings(Name = "CreateSeedData"), HttpPost]
    [DisplayName("创建种子数据")]
    public async Task CreateSeedData(CreateSeedDataInput input)
    {
        var strategy = _codeGenStrategyFactory.GetStrategy<CreateSeedDataInput>(CodeGenSceneEnum.TableSeedData);
        var result = (await strategy.GenerateCode(input))?.FirstOrDefault();
        await File.WriteAllTextAsync(result!.OutPath, result!.Context, Encoding.UTF8);
    }

    /// <summary>
    /// 获取种子数据列表 🔖
    /// </summary>
    /// <param name="configId"></param>
    /// <returns></returns>
    [DisplayName("获取种子数据列表")]
    public List<DataInitItemOutput> GetSeedDataList([FromQuery] string configId)
    {
        var seedDataTypes = SeedDataHelper.GetInitSeedDataTypeList();
        var outputList = new List<DataInitItemOutput>();
        foreach (var seedDataType in seedDataTypes)
        {
            var instance = Activator.CreateInstance(seedDataType);
            var hasDataMethod = seedDataType.GetMethod("HasData");
            var seedData = ((IEnumerable)hasDataMethod?.Invoke(instance, null))?.Cast<object>().ToArray() ?? [];

            var entityType = seedDataType.GetInterfaces().First().GetGenericArguments().First();
            var seedDataAtt = seedDataType.GetCustomAttribute<SeedDataAttribute>();
            outputList.Add(new DataInitItemOutput()
            {
                Name = seedDataType.Name,
                AssemblyName = seedDataType.Assembly.ManifestModule.Name,
                Order = seedDataAtt != null ? seedDataAtt.Order : 0,
                Count = seedData.Length,
                Description = entityType.GetCustomAttribute<SugarTable>().TableDescription + "种子数据"
            });
        }
        return outputList;
    }

    /// <summary>
    /// 初始化表结构 🔖
    /// </summary>
    /// <param name="input"></param>
    [DisplayName("初始化表结构")]
    public void InitTable(InitTableInput input)
    {
        if (!_userManager.SuperAdmin)
            throw Oops.Oh("只有超管才可以操作！");

        var dbProvider = _db.AsTenant().GetConnectionScope(input.ConfigId);
        SqlSugarSetup.InitTable(dbProvider, false, input.EntityNames);
    }

    /// <summary>
    /// 初始化种子数据 🔖
    /// </summary>
    /// <param name="input"></param>
    [DisplayName("初始化种子数据")]
    public void InitSeedData(InitSeedDataInput input)
    {
        if (!_userManager.SuperAdmin)
            throw Oops.Oh("只有超管才可以操作！");

        var dbProvider = _db.AsTenant().GetConnectionScope(input.ConfigId);
        SqlSugarSetup.InitSeedData(dbProvider, false, input.SeedNames);
    }

    /// <summary>
    /// 获取库表信息
    /// </summary>
    /// <returns></returns>
    private async Task<IEnumerable<EntityInfo>> GetEntityInfos()
    {
        var entityInfos = new List<EntityInfo>();

        var type = typeof(SugarTable);
        var types = new List<Type>();
        if (_codeGenOptions.EntityAssemblyNames != null)
        {
            foreach (var asm in _codeGenOptions.EntityAssemblyNames.Select(Assembly.Load))
            {
                types.AddRange(asm.GetExportedTypes().ToList());
            }
        }

        Type[] cosType = types.Where(u => IsMyAttribute(Attribute.GetCustomAttributes(u, false))).ToArray();
        foreach (var c in cosType)
        {
            var sugarAttribute = c.GetCustomAttributes(type, true)?.FirstOrDefault();

            var des = c.GetCustomAttributes(typeof(DescriptionAttribute), true);
            var description = "";
            if (des.Length > 0)
            {
                description = ((DescriptionAttribute)des[0]).Description;
            }

            entityInfos.Add(new EntityInfo()
            {
                EntityName = c.Name,
                DbTableName = sugarAttribute == null ? c.Name : ((SugarTable)sugarAttribute).TableName,
                TableDescription = description,
                Type = c
            });
        }

        return await Task.FromResult(entityInfos);

        bool IsMyAttribute(Attribute[] o)
        {
            return o.Any(a => a.GetType() == type);
        }
    }

    /// <summary>
    /// 获取实体模板文件路径
    /// </summary>
    /// <returns></returns>
    private static string GetEntityTemplatePath()
    {
        var templatePath = Path.Combine(App.WebHostEnvironment.WebRootPath, "template");
        return Path.Combine(templatePath, "Entity.cs.vm");
    }

    /// <summary>
    /// 获取种子数据模板文件路径
    /// </summary>
    /// <returns></returns>
    private static string GetSeedDataTemplatePath()
    {
        var templatePath = Path.Combine(App.WebHostEnvironment.WebRootPath, "template");
        return Path.Combine(templatePath, "SeedData.cs.vm");
    }

    /// <summary>
    /// 设置生成实体文件路径
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    private static string GetEntityTargetPath(CreateEntityInput input)
    {
        var backendPath = Path.Combine(new DirectoryInfo(App.WebHostEnvironment.ContentRootPath).Parent.FullName, input.Position, "Entity");
        if (!Directory.Exists(backendPath))
            Directory.CreateDirectory(backendPath);
        return Path.Combine(backendPath, input.EntityName + ".cs");
    }

    /// <summary>
    /// 设置生成种子数据文件路径
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    private static string GetSeedDataTargetPath(CreateSeedDataInput input)
    {
        var backendPath = Path.Combine(new DirectoryInfo(App.WebHostEnvironment.ContentRootPath).Parent.FullName, input.Position, "SeedData");
        if (!Directory.Exists(backendPath))
            Directory.CreateDirectory(backendPath);
        return Path.Combine(backendPath, input.SeedDataName + ".cs");
    }

    /// <summary>
    /// 备份数据库（PostgreSQL）🔖
    /// </summary>
    /// <returns></returns>
    [HttpPost, NonUnify]
    [DisplayName("备份数据库（PostgreSQL）")]
    public async Task<IActionResult> BackupDatabase()
    {
        if (_db.CurrentConnectionConfig.DbType != SqlSugar.DbType.PostgreSQL)
            throw Oops.Oh("只支持 PostgreSQL 数据库 😁");

        var npgsqlConn = new NpgsqlConnectionStringBuilder(_db.CurrentConnectionConfig.ConnectionString);
        if (npgsqlConn == null || string.IsNullOrWhiteSpace(npgsqlConn.Host) || string.IsNullOrWhiteSpace(npgsqlConn.Username) || string.IsNullOrWhiteSpace(npgsqlConn.Password) ||
            string.IsNullOrWhiteSpace(npgsqlConn.Database))
            throw Oops.Oh("PostgreSQL 数据库配置错误");

        // 确保备份目录存在
        var backupDirectory = Path.Combine(Directory.GetCurrentDirectory(), "backups");
        Directory.CreateDirectory(backupDirectory);

        // 构建备份文件名
        string backupFileName = $"backup_{DateTime.Now:yyyyMMddHHmmss}.sql";
        string backupFilePath = Path.Combine(backupDirectory, backupFileName);

        // 启动pg_dump进程进行备份
        // 设置密码：export PGPASSWORD='xxxxxx'
        var bash = $"-U {npgsqlConn.Username} -h {npgsqlConn.Host} -p {npgsqlConn.Port} -E UTF8 -F c -b -v -f {backupFilePath} {npgsqlConn.Database}";
        var startInfo = new ProcessStartInfo
        {
            FileName = "pg_dump",
            Arguments = bash,
            UseShellExecute = false,
            RedirectStandardOutput = true,
            RedirectStandardError = true,
            CreateNoWindow = true,
            EnvironmentVariables =
            {
                ["PGPASSWORD"] = npgsqlConn.Password
            }
        };

        //_logger.LogInformation("备份数据库：pg_dump " + bash);

        //try
        //{
        using (var backupProcess = Process.Start(startInfo))
        {
            await backupProcess.WaitForExitAsync();

            //var output = await backupProcess.StandardOutput.ReadToEndAsync();
            //var error = await backupProcess.StandardError.ReadToEndAsync();

            // 检查备份是否成功
            if (backupProcess.ExitCode != 0)
            {
                throw Oops.Oh($"备份失败：ExitCode({backupProcess.ExitCode})");
            }
        }

        //    _logger.LogInformation($"备份成功：{backupFilePath}");
        //}
        //catch (Exception ex)
        //{
        //    _logger.LogError(ex, $"备份失败：");
        //    throw;
        //}

        // 若备份成功则提供下载链接
        return new FileStreamResult(new FileStream(backupFilePath, FileMode.Open), "application/octet-stream")
        {
            FileDownloadName = backupFileName
        };
    }

    /// <summary>
    /// 生成SQL语句 🔖
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    [DisplayName("生成SQL语句")]
    public async Task<string> GenerateSQL(GenerateSQLInput input)
    {
        return await Task.FromResult(BuildSQL.Build(input));
    }

    /// <summary>
    /// 执行SQL语句 🔖
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    [DisplayName("执行SQL语句")]
    public async Task<DataTable> ExecuteSQL(GenerateSQLInput input)
    {
        var sql = await GenerateSQL(input);
        if (Regex.IsMatch(sql, @"\b(delete|update)\b", RegexOptions.IgnoreCase))
            throw Oops.Oh("非法SQL语句，已停止执行");

        var dt = await _db.Ado.GetDataTableAsync(sql);
        return dt;
    }
}