import { UserRepository } from "../repositories/UserRepository";
import { encrypt } from "../utils/encryptionUtils";
import { ValidationError, UnauthorizedError } from "../errors/httpErrors";
import { UserDto } from "../dtos/UserDto";
import { UserDtoEntityMapper } from "../mappers/UserDtoEntityMapper";

export class AuthController {
  constructor(
    private userRepository: UserRepository,
    private mapper: UserDtoEntityMapper
  ) {}

  async login(userName: string, password: string): Promise<{ token: string; user: UserDto }> {
    if (!userName || !password) {
      throw new ValidationError("Username and password are required");
    }

    // Find user by userName
    const user = await this.userRepository.findByUserName(userName);
    // Compare password
    const passwordMatches = encrypt.comparepassword(user.password, password);
    if (!passwordMatches || !user ) {
      throw new UnauthorizedError("Invalid username or password");
    }

    // Create JWT
    const token = encrypt.generateToken({
      id: user.id,
      userName: user.userName,
      role: user.role,
    });

    return {
      token,
      user: this.mapper.toDto(user),
    };
  }
}