using Contracts.DTO;
using Contracts.Mappers;
using Contracts.Repositories;
using Contracts.SearchModels;
using Contracts.Services;
using Contracts.ViewModels;
using Services.Support.Exceptions;

namespace Services.Domain;

public class AuthService : IAuthService
{
    private readonly IUserRepo _userRepo;

    public AuthService(IUserRepo userRepo)
    {
        _userRepo = userRepo;
    }

    public async Task<UserViewModel> Login(UserLoginDto loginData)
    {
        if (loginData == null || string.IsNullOrWhiteSpace(loginData.Name)
            || string.IsNullOrWhiteSpace(loginData.Password))
        {
            throw new ArgumentException("Неверные данные для входа");
        }

        var user = await _userRepo.Get(new UserSearch() { Name = loginData.Name });
        if (user == null)
        {
            throw new UserNotFoundException($"Пользователь {loginData.Name} не найден");
        }

        return user.ToView();
    }

    public async Task<UserViewModel> Register(UserDto user)
    {
        var existingUser = await _userRepo.Get(new UserSearch() { Name = user.Name });
        if (existingUser != null)
        {
            throw new AlreadyExistsException("Такой пользователь уже существует");
        }
        
        var createdUser = await _userRepo.Create(user);
        
        return createdUser.ToView();
    }
}