namespace qtc_api.Services.RoomService
{
    public class RoomService : IRoomService
    {
        private readonly DataContext _dataContext;

        private long idMax = 900000000000000000;

        public RoomService(DataContext dataContext)
        {
            _dataContext = dataContext;
        }

        public async Task<ServiceResponse<Room>> AddRoom(string userId, RoomDto room)
        {
            var serviceResponse = new ServiceResponse<Room>();
            var roomList = await _dataContext.Rooms.ToListAsync();

            var roomToAdd = new Room();
            Random rnd = new Random();

            roomToAdd.Id = LongRandom(1, idMax, rnd).ToString();
            roomToAdd.Name = room.Name;
            roomToAdd.CreatorId = userId;
            roomToAdd.CreatedAt = DateTime.UtcNow;

            var cRoom = await _dataContext.Rooms.FirstOrDefaultAsync(x => x.Name == roomToAdd.Name);

            if (cRoom == null)
            {
                await _dataContext.Rooms.AddAsync(roomToAdd);
                await _dataContext.SaveChangesAsync();

                serviceResponse.Success = true;
                serviceResponse.Data = roomToAdd;
            }
            else
            {
                serviceResponse.Success = false;
                serviceResponse.Message = "Room already exists.";
            }

            return serviceResponse;
        }

        public async Task<ServiceResponse<Room>> DeleteRoom(string id)
        {
            var serviceResponse = new ServiceResponse<Room>();
            var room = await _dataContext.Rooms.FirstOrDefaultAsync(x => x.Id == id);

            if (room != null)
            {
                _dataContext.Rooms.Remove(room);
                await _dataContext.SaveChangesAsync();

                serviceResponse.Success = true;
                serviceResponse.Data = room;
            }
            else
            {
                serviceResponse.Success = false;
                serviceResponse.Message = "Room not found.";
            }

            return serviceResponse;
        }

        public async Task<ServiceResponse<List<Room>>> GetAllRooms()
        {
            var serviceResponse = new ServiceResponse<List<Room>>();
            var rooms = await _dataContext.Rooms.ToListAsync();

            serviceResponse.Success = true;
            serviceResponse.Data = rooms;
            return serviceResponse;
        }

        public async Task<ServiceResponse<Room>> GetRoom(string id)
        {
            var serviceResponse = new ServiceResponse<Room>();
            var room = await _dataContext.Rooms.FirstOrDefaultAsync(x => x.Id == id);

            if (room != null)
            {
                serviceResponse.Success = true;
                serviceResponse.Data = room;
            }
            else
            {
                serviceResponse.Success = false;
                serviceResponse.Message = "Room not found.";
            }

            return serviceResponse;
        }

        public Task<ServiceResponse<Room>> UpdateRoom(Room room)
        {
            throw new NotImplementedException();
        }

        private long LongRandom(long min, long max, Random rnd)
        {
            long result = rnd.Next((int)(min >> 32), (int)(max >> 32));
            result = result << 32;
            result = result | (long)rnd.Next((int)min, (int)max);
            return result;
        }
    }
}