using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Reflection;
using YD_Event.Core.Const;
using YD_Event.Core.Entities;
using YD_Event.Core.Enum;
using YD_Event.Core.Options;
using Mapster;
using Newtonsoft.Json;
using Yitter.IdGenerator;
using Microsoft.Data.SqlClient;

namespace SqlSugar;

public static class SqlSugarExtensions
{
    /// <summary>
    /// 添加 SqlSugar 拓展（适用于单个数据库）
    /// </summary>
    /// <param name="services"></param>
    /// <param name="config">数据库连接对象</param>
    /// <param name="buildAction"></param>
    /// <returns></returns>
    public static IServiceCollection AddSqlSugar(this IServiceCollection services, ConnectionConfigExt config, Action<ISqlSugarClient> buildAction = default)
    {
        return services.AddSqlSugar(new List<ConnectionConfigExt>()
        {
            config
        }, buildAction);
    }

    /// <summary>
    /// 添加 SqlSugar 拓展（适用于多数据库）
    /// </summary>
    /// <param name="services"></param>
    /// <param name="configs">数据库连接对象集合</param>
    /// <param name="buildAction"></param>
    /// <returns></returns>
    public static IServiceCollection AddSqlSugar(this IServiceCollection services, List<ConnectionConfigExt> configs, Action<SqlSugarClient> buildAction = default)
    {
        SqlSugarScope sqlSugarScope = new SqlSugarScope(configs.Adapt<List<ConnectionConfig>>(), buildAction ?? Aop);
        configs.ForEach(x =>
        {
            Init(sqlSugarScope, x);
        });
        services.AddSingleton<ISqlSugarClient>(sqlSugarScope);//使用单例注入
        services.AddSingleton<ITenant>(sqlSugarScope);
        services.AddUnitOfWork<SqlSugarUnitOfWork>();//事务
        services.AddScoped(typeof(ISqlSugarRepository<>), typeof(SqlSugarRepository<>));//注入泛型仓储

        return services;
    }

    /// <summary>
    /// 初始化数据库
    /// </summary>
    /// <param name="client"></param>
    /// <param name="config"></param>
    static void Init(SqlSugarScope client, ConnectionConfigExt config)
    {
        if (!config.EnableInitDb)
        {
            return;
        }
        SqlSugarScopeProvider provider = client.GetConnectionScope(config.ConfigId);
        //创建数据库
        provider.DbMaintenance.CreateDatabase();
        IEnumerable<Type> types = App.EffectiveTypes.Where(x => !x.IsInterface && x.IsClass && !x.IsAbstract && typeof(IEntity).IsAssignableFrom(x));
        provider.CodeFirst.InitTables(types.ToArray());

        //初始化数据
        InitData(client);
    }

    /// <summary>
    /// 添加 SqlSugar 服务
    /// </summary>
    /// <param name="services"></param>
    /// <returns></returns>
    public static IServiceCollection AddSqlSugar(this IServiceCollection services)
    {
        var options = App.GetOptions<DbConnectionOptions>();
        if (string.Equals(Environment.GetEnvironmentVariable("YD_EVENT_ALLOW_UNENCRYPTED_SQL"), "1", StringComparison.Ordinal))
        {
            options.Connections.ForEach(connection =>
            {
                if (connection.DbType != DbType.SqlServer) return;
                var builder = new SqlConnectionStringBuilder(connection.ConnectionString)
                {
                    Encrypt = false,
                    TrustServerCertificate = true
                };
                connection.ConnectionString = builder.ConnectionString;
            });
        }
        ICacheService ormCache = new SqlSugarCache();
        options.Connections.ForEach(x =>
        {
            x.MoreSettings = new ConnMoreSettings()
            {
                //所有 增、删 、改 会自动调用.RemoveDataCache()
                IsAutoRemoveDataCache = true
            };
            //配置缓存
            x.ConfigureExternalServices = new ConfigureExternalServices()
            {
                DataInfoCacheService = ormCache,
                EntityService = ((prop, column) =>
                {
                    //如果实体不是主键，并且是可空类型，表列设置为可空(支持string?和string)
                    if (column.IsPrimarykey == false && new NullabilityInfoContext()
                            .Create(prop).WriteState is NullabilityState.Nullable)
                    {
                        column.IsNullable = true;
                    }
                })

            };

        });
        return AddSqlSugar(services, options.Connections, Aop);
    }

    /// <summary>
    /// 拦截器
    /// </summary>
    private static readonly Action<SqlSugarClient> Aop = (db) =>
    {
        db.Aop.DataExecuting = (_, entityInfo) =>
        {
            try
            {
                switch (entityInfo.OperationType)
                {
                    //执行insert时
                    case DataFilterType.InsertByObject:
                        //自动设置主键
                        if (entityInfo.EntityColumnInfo.IsPrimarykey &&
                            entityInfo.EntityValue is Entity<long> { Id: 0 } entity)
                        {
                            entity.Id = YitIdHelper.NextId();
                        }
                        // 创建审计字段只在调用方未赋值时补齐，保留数据迁移等场景的显式历史值。
                        if (entityInfo.PropertyName == nameof(ICreatedTime.CreatedTime) &&
                            entityInfo.EntityValue is ICreatedTime { CreatedTime: var createdAt } &&
                            createdAt == DateTime.MinValue)
                        {
                            entityInfo.SetValue(DateTime.Now);
                        }
                        if (entityInfo.PropertyName == nameof(ICreatedUserId.CreatedUserId) &&
                            entityInfo.EntityValue is ICreatedUserId { CreatedUserId: 0 } &&
                            TryGetCurrentUserId(out var createdUserId))
                        {
                            entityInfo.SetValue(createdUserId);
                        }
                        break;
                    case DataFilterType.UpdateByObject:
                        // 修改时间每次更新都刷新；有登录上下文时，修改人统一取当前操作者。
                        if (entityInfo.PropertyName == nameof(IUpdatedTime.UpdatedTime) &&
                            entityInfo.EntityValue is IUpdatedTime)
                        {
                            entityInfo.SetValue(DateTime.Now);
                        }
                        if (entityInfo.PropertyName == nameof(IUpdatedUserId.UpdatedUserId) &&
                            entityInfo.EntityValue is IUpdatedUserId updatedUser)
                        {
                            var claimValue = App.User?.FindFirst(AuthClaimsConst.AuthIdKey)?.Value;
                            var updatedUserId = ResolveUpdatedUserId(claimValue, updatedUser.UpdatedUserId);
                            if (updatedUserId.HasValue)
                            {
                                // 存在有效登录用户时始终覆盖显式值，确保记录最后一次实际操作人。
                                entityInfo.SetValue(updatedUserId.Value);
                            }
                        }

                        break;
                    case DataFilterType.DeleteByObject:
                        break;
                }
            }
            catch (TargetInvocationException ex)
            {
                Console.WriteLine($"[Error] TargetInvocationException in DataExecuting: {ex.InnerException?.ToString() ?? ex.Message}");
                throw ex.InnerException ?? ex;
            }
            catch (Exception ex)
            {
                Console.WriteLine($"[Error] Exception in DataExecuting: {ex.ToString()}");
                throw;
            }
        };

        // 文档地址：https://www.donet5.com/Home/Doc?typeId=1204
        db.Aop.OnLogExecuting = (sql, parameters) =>
        {
            var originColor = Console.ForegroundColor;
            if (sql.StartsWith("SELECT", StringComparison.OrdinalIgnoreCase))
                Console.ForegroundColor = ConsoleColor.Green;
            if (sql.StartsWith("UPDATE", StringComparison.OrdinalIgnoreCase) || sql.StartsWith("INSERT", StringComparison.OrdinalIgnoreCase))
                Console.ForegroundColor = ConsoleColor.Yellow;
            if (sql.StartsWith("DELETE", StringComparison.OrdinalIgnoreCase))
                Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine("【" + DateTime.Now + "——执行SQL】\r\n" + UtilMethods.GetSqlString(db.CurrentConnectionConfig.DbType, sql, parameters) + "\r\n");
            Console.ForegroundColor = originColor;
            //App.PrintToMiniProfiler("SqlSugar", "Info", sql + "\r\n" + db.Utilities.SerializeObject(parameters.ToDictionary(it => it.ParameterName, it => it.Value)));
        };
        db.Aop.OnError = ex =>
        {
            if (ex.Parametres == null) return;
            var originColor = Console.ForegroundColor;
            Console.ForegroundColor = ConsoleColor.DarkRed;
            var pars = db.Utilities.SerializeObject(((SugarParameter[])ex.Parametres).ToDictionary(it => it.ParameterName, it => it.Value));
            Console.WriteLine("【" + DateTime.Now + "——错误SQL】\r\n" + UtilMethods.GetSqlString(db.CurrentConnectionConfig.DbType, ex.Sql, (SugarParameter[])ex.Parametres) + "\r\n");
            Console.ForegroundColor = originColor;
            // App.PrintToMiniProfiler("SqlSugar", "Error", $"{ex.Message}{Environment.NewLine}{ex.Sql}{pars}{Environment.NewLine}");
        };

        //配置逻辑删除过滤器（查询数据时过滤掉已被标记删除的数据）
        db.QueryFilter.AddTableFilter<ISoftDelete>(it => it.DeleteMark == false);
    };

    private static bool TryGetCurrentUserId(out long userId)
    {
        var claimValue = App.User?.FindFirst(AuthClaimsConst.AuthIdKey)?.Value;
        return long.TryParse(claimValue, out userId) && userId > 0;
    }

    /// <summary>
    /// 有有效登录用户时以当前用户为准；无用户上下文时保留后台任务显式传入的操作者。
    /// </summary>
    internal static long? ResolveUpdatedUserId(string? currentUserClaim, long? originalUserId)
    {
        return long.TryParse(currentUserClaim, out var currentUserId) && currentUserId > 0
            ? currentUserId
            : originalUserId;
    }

    /// <summary>
    /// 初始化基础数据
    /// </summary>
    private static void InitData(SqlSugarScope client)
    {
        string path = Path.Combine(AppContext.BaseDirectory, "InitData");
        var dir = new DirectoryInfo(path);
        var files = dir.GetFiles("*.txt");
        foreach (var file in files)
        {
            using var reader = file.OpenText();
            string s = reader.ReadToEnd();
            var table = JsonConvert.DeserializeObject<DataTable>(s);
            if (table.Rows.Count == 0)
            {
                continue;
            }
            table.TableName = file.Name.Replace(".txt", "");

            client.Storageable(table).WhereColumns("Id").ToStorage().AsInsertable.ExecuteCommand();
        }
    }
}