import config from "config";
import {Request, Response} from "express";

import Time from "../common/Time.js";
import Controller from "../Controller.js";
import ModelFactory from "../db/ModelFactory.js";
import Validator, {EMAIL_REGEX, InvalidFormatValidationError} from "../db/Validator.js";
import {BadRequestError, ForbiddenHttpError, NotFoundHttpError} from "../HttpError.js";
import MailTemplate from "../mail/MailTemplate.js";
import {ADD_EMAIL_MAIL_TEMPLATE, REMOVE_PASSWORD_MAIL_TEMPLATE} from "../Mails.js";
import {RequireAuthMiddleware} from "./AuthComponent.js";
import AuthMagicLinkActionType from "./magic_link/AuthMagicLinkActionType.js";
import MagicLinkController from "./magic_link/MagicLinkController.js";
import User from "./models/User.js";
import UserEmail from "./models/UserEmail.js";
import UserNameComponent from "./models/UserNameComponent.js";
import UserPasswordComponent from "./password/UserPasswordComponent.js";

export default class AccountController extends Controller {

    public constructor(
        private readonly addEmailMailTemplate: MailTemplate = ADD_EMAIL_MAIL_TEMPLATE,
        private readonly removePasswordMailTemplate: MailTemplate = REMOVE_PASSWORD_MAIL_TEMPLATE,
    ) {
        super();
    }

    public getRoutesPrefix(): string {
        return '/account';
    }

    public routes(): void {
        this.get('/', this.getAccount, 'account', RequireAuthMiddleware);

        if (ModelFactory.get(User).hasComponent(UserNameComponent)) {
            this.post('/change-name', this.postChangeName, 'change-name', RequireAuthMiddleware);
        }

        if (ModelFactory.get(User).hasComponent(UserPasswordComponent)) {
            this.post('/change-password', this.postChangePassword, 'change-password', RequireAuthMiddleware);
            this.post('/remove-password', this.postRemovePassword, 'remove-password', RequireAuthMiddleware);
        }

        this.post('/add-email', this.addEmail, 'add-email', RequireAuthMiddleware);
        this.post('/set-main-email', this.postSetMainEmail, 'set-main-email', RequireAuthMiddleware);
        this.post('/remove-email', this.postRemoveEmail, 'remove-email', RequireAuthMiddleware);
    }

    protected async getAccount(req: Request, res: Response): Promise<void> {
        const user = req.as(RequireAuthMiddleware).getUser();

        const passwordComponent = user.asOptional(UserPasswordComponent);

        const nameComponent = user.asOptional(UserNameComponent);
        const nameChangeWaitPeriod = config.get<number>('auth.name_change_wait_period');
        const nameChangedAt = nameComponent?.getNameChangedAt()?.getTime() || Date.now();
        const nameChangeRemainingTime = new Date(nameChangedAt + nameChangeWaitPeriod);

        res.render('auth/account/account', {
            main_email: await user.mainEmail.get(),
            emails: await user.emails.get(),
            display_email_warning: config.get('app.display_email_warning'),
            has_password_component: !!passwordComponent,
            has_password: passwordComponent?.hasPassword(),
            has_name_component: !!nameComponent,
            name_change_wait_period: Time.humanizeDuration(nameChangeWaitPeriod, false, true),
            can_change_name: nameComponent?.canChangeName(),
            can_change_name_in: Time.humanizeTimeTo(nameChangeRemainingTime),
        });
    }

    protected async postChangeName(req: Request, res: Response): Promise<void> {
        await Validator.validate({
            'name': new Validator().defined(),
        }, req.body);

        const user = req.as(RequireAuthMiddleware).getUser();
        const userNameComponent = user.as(UserNameComponent);

        if (!userNameComponent.setName(req.body.name)) {
            const nameChangedAt = userNameComponent.getNameChangedAt()?.getTime() || Date.now();
            const nameChangeWaitPeriod = config.get<number>('auth.name_change_wait_period');
            req.flash('error', `Your can't change your name until ${new Date(nameChangedAt + nameChangeWaitPeriod)}.`);
            res.redirect(Controller.route('account'));
            return;
        }

        await user.save();

        req.flash('success', `Your name was successfully changed to ${req.body.name}.`);
        res.redirect(Controller.route('account'));
    }

    protected async postChangePassword(req: Request, res: Response): Promise<void> {
        const validationMap = {
            'new_password': new Validator().defined(),
            'new_password_confirmation': new Validator().sameAs('new_password', req.body.new_password),
        };
        await Validator.validate(validationMap, req.body);
        const user = req.as(RequireAuthMiddleware).getUser();
        const passwordComponent = user.as(UserPasswordComponent);
        if (passwordComponent.hasPassword() && !await passwordComponent.verifyPassword(req.body.current_password)) {
            req.flash('error', 'Invalid current password.');
            res.redirect(Controller.route('account'));
            return;
        }

        await passwordComponent.setPassword(req.body.new_password, 'new_password');
        await user.save();

        req.flash('success', 'Password changed successfully.');
        res.redirect(Controller.route('account'));
    }

    protected async postRemovePassword(req: Request, res: Response): Promise<void> {
        const user = req.as(RequireAuthMiddleware).getUser();
        const mainEmail = await user.mainEmail.get();
        if (!mainEmail || !mainEmail.email) {
            req.flash('error', 'You can\'t remove your password without adding an email address first.');
            res.redirect(Controller.route('account'));

            return;
        }

        await MagicLinkController.sendMagicLink(
            this.getApp(),
            req.getSession().id,
            AuthMagicLinkActionType.REMOVE_PASSWORD,
            Controller.route('account'),
            mainEmail.email,
            this.removePasswordMailTemplate,
            {},
        );

        res.redirect(Controller.route('magic_link_lobby', undefined, {
            redirect_uri: Controller.route('account'),
        }));
    }


    protected async addEmail(req: Request, res: Response): Promise<void> {
        await Validator.validate({
            email: new Validator().defined().regexp(EMAIL_REGEX),
        }, req.body);

        const email = req.body.email;

        // Existing email
        if (await UserEmail.select().where('email', email).first()) {
            const error = new InvalidFormatValidationError('You already have this email.');
            error.thingName = 'email';
            throw error;
        }

        await MagicLinkController.sendMagicLink(
            this.getApp(),
            req.getSession().id,
            AuthMagicLinkActionType.ADD_EMAIL,
            Controller.route('account'),
            email,
            this.addEmailMailTemplate,
            {
                email: email,
            },
        );

        res.redirect(Controller.route('magic_link_lobby', undefined, {
            redirect_uri: Controller.route('account'),
        }));
    }

    protected async postSetMainEmail(req: Request, res: Response): Promise<void> {
        if (!req.body.id)
            throw new BadRequestError('Missing id field', 'Check form parameters.', req.url);

        const user = req.as(RequireAuthMiddleware).getUser();

        const userEmail = await UserEmail.getById(req.body.id);
        if (!userEmail)
            throw new NotFoundHttpError('email', req.url);
        if (userEmail.user_id !== user.id)
            throw new ForbiddenHttpError('email', req.url);
        if (userEmail.id === user.main_email_id)
            throw new BadRequestError('This address is already your main address',
                'Try refreshing the account page.', req.url);

        user.main_email_id = userEmail.id;
        await user.save();

        req.flash('success', 'This email was successfully set as your main address.');
        res.redirect(Controller.route('account'));
    }

    protected async postRemoveEmail(req: Request, res: Response): Promise<void> {
        if (!req.body.id)
            throw new BadRequestError('Missing id field', 'Check form parameters.', req.url);

        const user = req.as(RequireAuthMiddleware).getUser();

        const userEmail = await UserEmail.getById(req.body.id);
        if (!userEmail)
            throw new NotFoundHttpError('email', req.url);
        if (userEmail.user_id !== user.id)
            throw new ForbiddenHttpError('email', req.url);
        if (userEmail.id === user.main_email_id)
            throw new BadRequestError('Cannot remove main email address', 'Try refreshing the account page.', req.url);

        await userEmail.delete();

        req.flash('success', 'This email was successfully removed from your account.');
        res.redirect(Controller.route('account'));
    }
}