import User from '../models/User.js';
import bcrypt from 'bcrypt';
import TokenService from './TokenService.js';
import UserDto from '../dtos/UserDto.js';
import ApiError from '../controllers/ErrorController.js';

class AuthService {
    async registration({login, password}) {
        const candidate = await User.findOne({login});

        if(candidate) {
            throw ApiError.BadRequest('Пользователь с введенным логином уже существует');
        }

        const hashPassword = await bcrypt.hash(password, 5);
        const createdUser = await User.create({login, password: hashPassword });
        const userDto = new UserDto(createdUser);

        return {user: userDto};
    }

    async login({login, password}) {
        const getUser = await User.findOne({login});

        if(!getUser) {
            throw ApiError.BadRequest('Пользователя с введенным логином не существует');
        }

        const isPasswordValid = bcrypt.compareSync(password, getUser.password);
        if(!isPasswordValid) {
            throw ApiError.BadRequest('Не верный пароль');
        }

        const userDto = new UserDto(getUser);
        const tokens = TokenService.generateTokens({...userDto});
        await TokenService.saveToken(userDto._id, tokens.refreshToken);

        return {...tokens, user: userDto};
    }

    async logout(refreshToken) {
        const token = await TokenService.removeToken(refreshToken);
        return token;
    }

    async refresh(refreshToken) {
        if(!refreshToken) {
            throw ApiError.UnauthorizedError();
        }
        const user = TokenService.validateRefreshToken(refreshToken);
        const getToken = await TokenService.findToken(refreshToken);
        if(!user || !getToken ) {
            throw ApiError.UnauthorizedError();
        }

        const getUser = await User.findById(user._id)
        const userDto = new UserDto(getUser);
        const tokens = TokenService.generateTokens({...userDto});
        await TokenService.saveToken(userDto._id, tokens.refreshToken);

        return {...tokens, user: userDto};
    }
}

export default new AuthService();