import * as fs from 'fs';
import { Application } from 'express';
import { routesNames } from './configs';
import { I18n4e, SupportedLanguage } from './interfaces';
import { LangObj } from './types';
import supportedLanguagesData from '../config/supportedLanguages.json';

export const clientRoutes = (app: Application, i18n4e: I18n4e) => {
	if (!i18n4e.enableClient) return;

	app.get(routesNames.getLangs.path, (req, res) => {
		let userLang: string = i18n4e.defaultLang;
		if (req.session) {
			if (req.session.lang) {
				userLang = req.session.lang;
			}
		}
		const obj: LangObj = {};
		const data: { suportedLanguages: SupportedLanguage[] } = supportedLanguagesData;

		const i18n4eMainLangName = data.suportedLanguages.find(
			(lang) => lang.code === userLang
		)?.name;
		obj[userLang] = i18n4eMainLangName ? i18n4eMainLangName : userLang;

		Object.keys(i18n4e.langsFilesPath).forEach((code) => {
			if (code == userLang) return;
			const language = data.suportedLanguages.find((lang) => lang.code === code);
			obj[code] = language ? language.name : code;
		});

		res.json(obj);
	});

	if (!i18n4e.useLangSession) return;

	app.post(routesNames.setLang.path, (req, res) => {
		let data = JSON.parse(req.headers.data as string);
		const lang = data.lang;
		req.session.lang = lang;
		res.json({ message: 'ok' });
	});

	app.get(routesNames.unsetLang.path, (req, res) => {
		req.session.lang = undefined;
		res.json({ message: 'ok' });
	});
};