import { Request, Response, Router } from "express";
import { route } from "@fosscord/api";
import bcrypt from "bcrypt";
import { Config, User, generateToken, adjustEmail, FieldErrors } from "@fosscord/util";
import crypto from "crypto";

const router: Router = Router();
export default router;

export interface LoginSchema {
	login: string;
	password: string;
	undelete?: boolean;
	captcha_key?: string;
	login_source?: string;
	gift_code_sku_id?: string;
}

router.post("/", route({ body: "LoginSchema" }), async (req: Request, res: Response) => {
	const { login, password, captcha_key, undelete } = req.body as LoginSchema;
	const email = adjustEmail(login);

	const config = Config.get();

	if (config.login.requireCaptcha && config.security.captcha.enabled) {
		if (!captcha_key) {
			const { sitekey, service } = config.security.captcha;
			return res.status(400).json({
				captcha_key: ["captcha-required"],
				captcha_sitekey: sitekey,
				captcha_service: service
			});
		}

		// TODO: check captcha
	}

	const user = await User.findOneOrFail({
		where: [{ phone: login }, { email: login }],
		select: ["data", "id", "disabled", "deleted", "settings", "totp_secret", "mfa_enabled"]
	}).catch((e) => {
		throw FieldErrors({ login: { message: req.t("auth:login.INVALID_LOGIN"), code: "INVALID_LOGIN" } });
	});

	if (undelete) {
		// undelete refers to un'disable' here
		if (user.disabled) await User.update({ id: user.id }, { disabled: false });
		if (user.deleted) await User.update({ id: user.id }, { deleted: false });
	} else {
		if (user.deleted) return res.status(400).json({ message: "This account is scheduled for deletion.", code: 20011 });
		if (user.disabled) return res.status(400).json({ message: req.t("auth:login.ACCOUNT_DISABLED"), code: 20013 });
	}

	// the salt is saved in the password refer to bcrypt docs
	const same_password = await bcrypt.compare(password, user.data.hash || "");
	if (!same_password) {
		throw FieldErrors({ password: { message: req.t("auth:login.INVALID_PASSWORD"), code: "INVALID_PASSWORD" } });
	}

	if (user.mfa_enabled) {
		// TODO: This is not a discord.com ticket. I'm not sure what it is but I'm lazy
		const ticket = crypto.randomBytes(40).toString("hex");

		await User.update({ id: user.id }, { totp_last_ticket: ticket });

		return res.json({
			ticket: ticket,
			mfa: true,
			sms: false,	// TODO
			token: null,
		})
	}

	const token = await generateToken(user.id);

	// Notice this will have a different token structure, than discord
	// Discord header is just the user id as string, which is not possible with npm-jsonwebtoken package
	// https://user-images.githubusercontent.com/6506416/81051916-dd8c9900-8ec2-11ea-8794-daf12d6f31f0.png

	res.json({ token, settings: user.settings });
});

/**
 * POST /auth/login
 * @argument { login: "email@gmail.com", password: "cleartextpassword", undelete: false, captcha_key: null, login_source: null, gift_code_sku_id: null, }

 * MFA required:
 * @returns {"token": null, "mfa": true, "sms": true, "ticket": "SOME TICKET JWT TOKEN"}

 * Captcha required:
 * @returns {"captcha_key": ["captcha-required"], "captcha_sitekey": null, "captcha_service": "recaptcha"}

 * Sucess:
 * @returns {"token": "USERTOKEN", "settings": {"locale": "en", "theme": "dark"}}

 */