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

namespace IM_API.Services
{
    public class MessageService : IMessageSevice
    {
        private readonly ImContext _context;
        private readonly ILogger<MessageService> _logger;
        private readonly IMapper _mapper;
        public MessageService(ImContext context, ILogger<MessageService> logger, IMapper mapper)
        {
            _context = context;
            _logger = logger;
            _mapper = mapper;
        }

        public Task<List<MessageBaseDto>> GetGroupMessagesAsync(int groupId, int page, int pageSize, bool desc)
        {
            throw new NotImplementedException();
        }

        public Task<List<MessageBaseDto>> GetPrivateMessagesAsync(int userAId, int userBId, int page, int pageSize, bool desc)
        {
            throw new NotImplementedException();
        }

        public Task<int> GetUnreadCountAsync(int userId)
        {
            throw new NotImplementedException();
        }

        public Task<List<MessageBaseDto>> GetUnreadMessagesAsync(int userId)
        {
            throw new NotImplementedException();
        }

        public Task<bool> MarkAsReadAsync(int userId, long messageId)
        {
            throw new NotImplementedException();
        }

        public Task<bool> MarkConversationAsReadAsync(int userId, int? userBId, int? groupId)
        {
            throw new NotImplementedException();
        }

        public Task<bool> RecallMessageAsync(int userId, int messageId)
        {
            throw new NotImplementedException();
        }
        #region 发送群消息
        public async Task<bool> SendGroupMessageAsync(int senderId, int groupId, MessageBaseDto dto)
        {
            //判断群存在
            var isExist = await _context.Groups.AnyAsync(x => x.Id == groupId);
            if (!isExist) throw new BaseException(CodeDefine.GROUP_NOT_FOUND);
            //判断是否是群成员
            var isMember = await _context.GroupMembers.AnyAsync(x => x.GroupId == groupId && x.UserId == senderId);
            if (!isMember) throw new BaseException(CodeDefine.NO_GROUP_PERMISSION);
            var message = _mapper.Map<Message>(dto);
            message.Sender = senderId;
            message.StreamKey = StreamKeyBuilder.Group(groupId);
            _context.Messages.Add(message);
            await _context.SaveChangesAsync();
            return true;

        }
        #endregion
        #region 发送私聊消息
        public async Task<bool> SendPrivateMessageAsync(int senderId, int receiverId, MessageBaseDto dto)
        {
            bool isExist = await _context.Friends.AnyAsync(x => x.FriendId == receiverId);
            if (!isExist) throw new BaseException(CodeDefine.FRIEND_RELATION_NOT_FOUND);
            var message = _mapper.Map<Message>(dto);
            message.Sender = senderId;
            //生成消息流唯一标识符
            message.StreamKey = StreamKeyBuilder.Private(dto.SenderId, dto.ReceiverId);
            _context.Messages.Add(message);
            await _context.SaveChangesAsync();
            return true;
        }
        #endregion
    }
}