using AutoMapper;
using IM_API.Dtos.User;
using IM_API.Exceptions;
using IM_API.Interface.Services;
using IM_API.Models;
using IM_API.Tools;
using Microsoft.EntityFrameworkCore;
using StackExchange.Redis;

namespace IM_API.Services
{
    public class UserService : IUserService
    {
        private readonly ImContext _context;
        private readonly ILogger<UserService> _logger;
        private readonly IMapper _mapper;
        private readonly ICacheService _cacheService;
        public UserService(ImContext imContext,ILogger<UserService> logger,IMapper mapper, ICacheService cacheService)
        {
            this._context = imContext;
            this._logger = logger;
            this._mapper = mapper;
            _cacheService = cacheService;
        }
        #region 获取用户信息
        public async Task<UserInfoDto> GetUserInfoAsync(int userId)
        {
            //查询redis缓存，如果存在直接返回不走查库逻辑
            var key = RedisKeys.GetUserinfoKey(userId.ToString());
            var userinfoCache = await _cacheService.GetAsync<User>(key);
            if (userinfoCache != null) return _mapper.Map<UserInfoDto>(userinfoCache);
            //无缓存查库
            var user = await _context.Users
                .FirstOrDefaultAsync(x => x.Id == userId);
            if (user == null)
            {
                throw new BaseException(CodeDefine.USER_NOT_FOUND);
            }
            await _cacheService.SetUserCacheAsync(user);
            return _mapper.Map<UserInfoDto>(user);
        }
        #endregion
        #region 通过用户名获取用户信息
        public async Task<UserInfoDto> GetUserInfoByUsernameAsync(string username)
        {
            var userinfo = await _cacheService.GetUserCacheAsync(username);
            if (userinfo != null) return _mapper.Map<UserInfoDto>(userinfo);
            var user = await _context.Users.FirstOrDefaultAsync(x => x.Username == username);
            if (user == null)
            {
                throw new BaseException(CodeDefine.USER_NOT_FOUND);
            }
            await _cacheService.SetUserCacheAsync(user);
            return _mapper.Map<UserInfoDto>(user);
        }
        #endregion
        #region 重置用户密码
        public async Task<bool> ResetPasswordAsync(int userId, string oldPassword, string password)
        {
            var user = await _context.Users.FirstOrDefaultAsync(x => x.Id == userId);
            if (user is null) throw new BaseException(CodeDefine.USER_NOT_FOUND);
            //验证原密码
            if (user.Password != oldPassword) throw new BaseException(CodeDefine.PASSWORD_ERROR);
            user.Password = password;
            await _context.SaveChangesAsync();
            return true;
        }
        #endregion
        #region 更新用户在线状态
        public async Task<bool> UpdateOlineStatusAsync(int userId,UserOnlineStatus onlineStatus)
        {
            var user = await _context.Users.FirstOrDefaultAsync(x => x.Id == userId);
            if (user is null) throw new BaseException(CodeDefine.USER_NOT_FOUND);
            user.OnlineStatusEnum = onlineStatus;
            await _context.SaveChangesAsync();
            return true;
        }
        #endregion
        #region 更新用户信息
        public async Task<UserInfoDto> UpdateUserAsync(int userId,UpdateUserDto dto)
        {
            var user = await _context.Users.FirstOrDefaultAsync(x => x.Id == userId);
            if (user is null) throw new BaseException(CodeDefine.USER_NOT_FOUND);
            _mapper.Map(dto,user);
            await _context.SaveChangesAsync();
            await _cacheService.SetUserCacheAsync(user);
            return _mapper.Map<UserInfoDto>(user);
        }
        #endregion
    }
}