import bcrypt from 'bcrypt';
import { v4 as uuidv4 } from 'uuid';
import User from '../models/community/user.js';
import UserParam from '../models/community/user_param.js';
import UserParamType from '../models/type/user_param.js';
import { sendAccountActivationEmail, sendPasswordResetEmail } from './emailService.js';

const saltRounds = 10;

export const registerUser = async ({ email, username, password, language }) => {
    const hashedPassword = await bcrypt.hash(password, saltRounds);
    const resetToken = uuidv4();
    const user = await User.create({
        email,
        username,
        password: hashedPassword,
        resetToken: resetToken,
        active: false,
        registration_date: new Date()
    });

    const languageType = await UserParamType.findOne({ where: { description: 'language' } });
    if (!languageType) {
        throw new Error('Language type not found');
    }

    await UserParam.create({
        userId: user.id,
        paramTypeId: languageType.id,
        value: language
    });

    const activationLink = `${process.env.FRONTEND_URL}/activate?token=${resetToken}`;
    await sendAccountActivationEmail(email, activationLink, username, resetToken, language);

    return { id: user.hashedId, username: user.username, active: user.active };
};

export const loginUser = async ({ username, password }) => {
    console.log('check login');
    const user = await User.findOne({ where: { username } });
    if (!user) {
        throw new Error('credentialsinvalid');
    }
    const match = await bcrypt.compare(password, user.password);
    if (!match) {
        throw new Error('credentialsinvalid');
    }
    return { id: user.hashedId, username: user.username, active: user.active };
};

export const handleForgotPassword = async ({ email }) => {
    const user = await User.findOne({ where: { email } });
    if (!user) {
        throw new Error('Email not found');
    }

    const resetToken = uuidv4();
    const resetLink = `${process.env.FRONTEND_URL}/reset-password?token=${resetToken}`;
    await user.update({ reset_token: resetToken });

    const languageParam = await UserParam.findOne({ where: { user_id: user.id, param_type_id: languageType.id } });
    const userLanguage = languageParam ? languageParam.value : 'en';

    await sendPasswordResetEmail(email, resetLink, userLanguage);

    return { message: 'Password reset email sent' };
};

export const activateUserAccount = async ({ token }) => {
    const user = await User.findOne({ where: { reset_token: token } });
    if (!user) {
        throw new Error('Invalid token');
    }

    await user.update({ active: true, reset_token: null });
    return { message: 'Account activated' };
};