using System;
using System.Configuration;
using System.Threading.Tasks;
using APT.Infrastructure.Api;
using APT.Infrastructure.Api.Redis;
using APT.Infrastructure.Core;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using ConfigurationManager = APT.Infrastructure.Api.ConfigurationManager;

namespace APT.Infrastructure.EF
{
    public class TenantInfoMiddleware
    {
        private readonly RequestDelegate _next;
        //private string TenantConnKey = "TenantConnKey_";
        public TenantInfoMiddleware(RequestDelegate next)
        {
            _next = next;
        }

        public async Task InvokeAsync(Microsoft.AspNetCore.Http.HttpContext context)
        {

            var tenantInfo = context.RequestServices.GetRequiredService<TenantInfo>();
            var tenantName = context.Request.Headers["Tenant"];
            APT.Infrastructure.Api.AppContext.CurrentSession.RootOrgId = null;

            if (string.IsNullOrEmpty(tenantName) || tenantName == "null")
            {
                tenantInfo.Name = tenantName;
                tenantInfo.Conn = ConfigurationManager.ConnectionStrings["default"];
            }
            else
            {
                if (tenantInfo.Name != tenantName)
                {
                    tenantInfo.Conn = GetDbConn(tenantName);
                }


            }

            await _next(context);
        }

        /// <summary>
        /// 根据租户获取数据库连接
        /// </summary>
        /// <param name="tenantName"></param>
        /// <returns></returns>
        public static string GetDbConn(string tenantName)
        {
            //redis取數據
            var deskey = APT.Infrastructure.Api.ConfigurationManager.AppSettings["ConnDataKey"];
            var tenantConnKey = APT.Infrastructure.Api.ConfigurationManager.AppSettings["TenantConnKey"];
            var env = ConfigurationManager.AppSettings["Env"];
            if (string.IsNullOrEmpty(deskey))
                deskey = "optenergy2021001";
            if (string.IsNullOrEmpty(tenantConnKey))
                tenantConnKey = "optiems";
            var tenantKey = tenantConnKey + tenantName + "_" + env;
            if (CsRedisManager.KeyExists(tenantKey))
            {
                var conns = CsRedisManager.StringGet(tenantKey);
                var retConn = conns == "null" ? null : EncryptHelper.AesDecrypt(conns, deskey);
                return retConn;
            }
            else
            {
                var url = APT.Infrastructure.Api.ConfigurationManager.AppSettings["ConnApiUrl"];
                if (!string.IsNullOrEmpty(url))
                {
                    url += $"?code={tenantName}&deskey={deskey}&tenantKey={tenantConnKey}";
                    var deData = WebUtils.Get(url, "");
                    //LoggerManager.GetLogger().Info($"TenantData:{deData}");
                    return EncryptHelper.AesDecrypt(deData, deskey);
                }
            }
            return ConfigurationManager.ConnectionStrings["default"];
        }

        /// <summary>
        /// 解密连接
        /// </summary>
        /// <param name="tenantName"></param>
        /// <returns></returns>
        public static string DesDbConn(string conn)
        {
            //redis取數據
            var deskey = APT.Infrastructure.Api.ConfigurationManager.AppSettings["ConnDataKey"];
            if (string.IsNullOrEmpty(deskey))
                deskey = "optenergy2021001";
            //LoggerManager.GetLogger().Info($"TenantData:{deData}");
            return EncryptHelper.AesDecrypt(conn, deskey);
        }

        /// <summary>
        /// 加密连接
        /// </summary>
        /// <param name="conn"></param>
        /// <returns></returns>
        public static string EnDbConn(string conn)
        {
            //redis取數據
            var deskey = APT.Infrastructure.Api.ConfigurationManager.AppSettings["ConnDataKey"];
            if (string.IsNullOrEmpty(deskey))
                deskey = "optenergy2021001";
            //LoggerManager.GetLogger().Info($"TenantData:{deData}");
            return EncryptHelper.AesEncrypt(conn, deskey);
        }
    }
}