using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using EntrustSettle.Common.Caches;
using EntrustSettle.Model.Models;
using SqlSugar;

namespace EntrustSettle.Common.DB;

public static class TenantUtil
{
    public static SysTenant DefaultTenantConfig(this SysTenant tenant)
    {
        tenant.DbType ??= DbType.Sqlite;

        //如果没有配置连接
        if (tenant.Connection.IsNullOrEmpty())
        {
            //此处默认配置 Sqlite 地址
            //实际业务中 也会有运维、系统管理员等来维护
            switch (tenant.DbType.Value)
            {
                case DbType.Sqlite:
                    tenant.Connection = $"DataSource={Path.Combine(Environment.CurrentDirectory, tenant.ConfigId)}.db";
                    break;
            }
        }

        return tenant;
    }

    public static ConnectionConfig GetConnectionConfig(this SysTenant tenant)
    {
        if (tenant.DbType is null)
        {
            throw new ArgumentException("Tenant DbType Must");
        }


        return new ConnectionConfig()
        {
            ConfigId = tenant.ConfigId,
            DbType = tenant.DbType.Value,
            ConnectionString = tenant.Connection,
            IsAutoCloseConnection = true,
            MoreSettings = new ConnMoreSettings()
            {
                IsAutoRemoveDataCache = true,
                SqlServerCodeFirstNvarchar = true,
            },
            ConfigureExternalServices = new ConfigureExternalServices()
            {
                DataInfoCacheService = new SqlSugarCacheService(),
                EntityService = (property, column) =>
                {
                    if (column.IsPrimarykey && property.PropertyType == typeof(int))
                    {
                        column.IsIdentity = true;
                    }
                    // 统一设置：long?/Datetime?等可为Null的类型以及String，设置IsNullable=true
                    if (column.IsPrimarykey == false &&
                        (column.PropertyInfo.PropertyType == typeof(string) || Nullable.GetUnderlyingType(column.PropertyInfo.PropertyType) != null))
                    {
                        column.IsNullable = true;
                    }
                }
            }
        };
    }

    //public static List<Type> GetTenantEntityTypes(TenantTypeEnum? tenantType = null)
    //{
    //    return RepositorySetting.Entitys
    //        .Where(u => !u.IsInterface && !u.IsAbstract && u.IsClass)
    //        .Where(s => IsTenantEntity(s, tenantType))
    //        .ToList();
    //}

    //public static bool IsTenantEntity(this Type u, TenantTypeEnum? tenantType = null)
    //{
    //    var mta = u.GetCustomAttribute<MultiTenantAttribute>();
    //    if (mta is null)
    //    {
    //        return false;
    //    }

    //    if (tenantType != null)
    //    {
    //        if (mta.TenantType != tenantType)
    //        {
    //            return false;
    //        }
    //    }

    //    return true;
    //}

    ///// <summary>
    ///// 租户分表方案中，为ISqlSugarClient配置要使用的表名
    ///// </summary>
    ///// <param name="db">ISqlSugarClient</param>
    ///// <param name="id">当前操作者所属租户ID</param>
    //public static void SetTenantTable(this ISqlSugarClient db, string id)
    //{
    //    var types = GetTenantEntityTypes(TenantTypeEnum.Tables);

    //    foreach (var type in types)
    //    {
    //        db.MappingTables.Add(type.Name, type.GetTenantTableName(db, id));
    //    }
    //}

    ///// <summary>
    ///// 根据实体类型获取租户分表的表名
    ///// </summary>
    ///// <param name="type">实体类型</param>
    ///// <param name="db">ISqlSugarClient</param>
    ///// <param name="id">租户ID</param>
    ///// <returns>租户分表的表名</returns>
    //public static string GetTenantTableName(this Type type, ISqlSugarClient db, string id)
    //{
    //    var entityInfo = db.EntityMaintenance.GetEntityInfo(type);
    //    return $@"{entityInfo.DbTableName}_{id}";
    //}

    ///// <summary>
    ///// 根据实体类型获取租户分表的表名
    ///// </summary>
    ///// <param name="type">实体类型</param>
    ///// <param name="db">ISqlSugarClient</param>
    ///// <param name="tenant">租户对象</param>
    ///// <returns>租户分表的表名</returns>
    //public static string GetTenantTableName(this Type type, ISqlSugarClient db, SysTenant tenant)
    //{
    //    return GetTenantTableName(type, db, tenant.Id.ToString());
    //}
}