using Ant.Core.Utils;
using Ant.Core.WebApi.Enum;
using Ant.Core.WebApi.Model;
using Central.Control.WebApi.Cache;
using Central.Control.WebApi.DbEntity;
using Central.Control.WebApi.EFDbContext;
using Central.Control.WebApi.Models.Request;
using Central.Control.WebApi.Models.Response;
using Central.Control.WebApi.Service.Interface;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace Central.Control.WebApi.Service
{
    /// <summary>
    /// 
    /// </summary>
    public class LoginService: ILoginService
    {
        private readonly ICacheHelper _cacheHelper;
        private readonly IDbContext _dbContent;
        private readonly IUserService _userService;

        /// <summary>
        /// 
        /// </summary>
        /// <param name="cacheHelper"></param>
        /// <param name="dbContent"></param>
        public LoginService(
            ICacheHelper cacheHelper,
            IDbContext dbContent,
            IUserService userService)
        {
            _cacheHelper = cacheHelper;
            _dbContent = dbContent;
            _userService = userService;
        }

        /// <summary>
        /// 设备登录接口
        /// </summary>
        /// <returns></returns>
        public ApiResult<DeviceLoginResponseDto> DeviceLogin(DeviceLoginRequestDto req)
        {
            var deviceInfo = _dbContent.Set<SYS_Device>().FirstOrDefault(p => p.Code == req.Code && p.Password == req.Password);
            if (deviceInfo == null)
            {
                return new ApiResult<DeviceLoginResponseDto>(ApiStatusCode.RecordNotFound, "用户名或密码不正确");
            }
            // 1、验证密码正确，老token进行失效
            var oldToken = _cacheHelper.Get<string>(deviceInfo.Code);
            if (!string.IsNullOrWhiteSpace(oldToken))
            {
                _cacheHelper.Remove(oldToken);
            }

            var loginSession = _dbContent.Set<SYS_LoginSession>().FirstOrDefault(p => p.UserId == deviceInfo.Id);
            bool isAdd = false;
            if (loginSession == null)
            {
                isAdd = true;
                loginSession = new SYS_LoginSession() { Id = IdGenerator.NewId() };
            }

            string token = IdGenerator.AntToken();
            // 2、存库
            loginSession.UserId = deviceInfo.Id;
            loginSession.UserName = deviceInfo.Code;
            loginSession.Token = token;
            loginSession.Expiration = DateTime.MaxValue;

            if (isAdd)
            {
                _dbContent.Set<SYS_LoginSession>().Add(loginSession);
            }
            // 执行保存
            _dbContent.SaveChanges();

            // 3、存cache
            _cacheHelper.SetByNotExpired(deviceInfo.Code, token);// 这一份存一个凭证
            _cacheHelper.SetByNotExpired(token, loginSession);// 这一份存真正的登录信息

            DeviceLoginResponseDto result = new DeviceLoginResponseDto()
            {
                Token = token
            };
            return new ApiResult<DeviceLoginResponseDto>(result);
        }

        /// <summary>
        /// 退出登录
        /// </summary>
        /// <returns></returns>
        public ApiResult Logout()
        {
            var session = _userService.GetLoginSession();

            // 删除cache session
            _cacheHelper.Remove(session.UserName);// 这一份存一个凭证
            _cacheHelper.Remove(session.Token);// 这一份存真正的登录信息

            // 删除数据库session
            var e = _dbContent.Set<SYS_LoginSession>().FirstOrDefault(m => m.UserId == session.UserId);
            _dbContent.Set<SYS_LoginSession>().Remove(e);
            _dbContent.SaveChanges();

            return new ApiResult();
        }

    }
}