import express, {RequestHandler} from 'express';
import sequelize from './../dbobject';

import Article, {articleI} from './../models/article';
import Tag from './../models/tag';

import {authorize} from './../auth';

/* eslint-disable */
const router = express.Router();
/* eslint-enable */

/* eslint-disable */
declare global {
	namespace Express {
		interface Request {
			article: articleI;
		}
	}
}
/* eslint-enable */

router.delete('/signout', async (_req, res) => {
	res.cookie('accessToken', '', {expires: new Date()});
	res.sendStatus(204);
});

router.get('/articletable', authorize, async (_req, res) => {
	const articles = await Article.findAll({
		attributes: [
			'id',
			'title',
			'createdAt',
		],
	});
	res.send(articles);
});

router.get('/new', authorize, (_req, res) => {
	res.render('admin/new', {article: Article.build(), tags: []});
});

router.get('/edit/:id', authorize, async (req, res) => {
	const article = await Article.findByPk(req.params.id,
		{rejectOnEmpty: true});
	const tags = await Tag.findAll({
		where: {articleId: article.id},
		attributes: [
			'name',
		],
	});
	res.render('admin/edit', {article, tags});
});

router.post('/', authorize, async (req, _res, next) => {
	req.article = Article.build();
	next();
}, saveArticleAndRedirect('new'));

router.put('/:id', authorize, async (req, _res, next) => {
	req.article = await Article.findByPk(req.params.id, {rejectOnEmpty: true});
	next();
}, saveArticleAndRedirect('edit'));

router.delete('/:id', authorize, async (req, _res) => {
	await Article.destroy({where: {id: req.params.id}, cascade: true});
});

/**
 * @param {string} path Path of redirection
 * @return {RequestHandler} middleware
 */
function saveArticleAndRedirect(path: string): RequestHandler {
	return async (req, res) => {
		let article: any = req.article;
		article.title = req.body.title;
		article.description = req.body.description;
		article.markdown = req.body.markdown;
		try {
			await sequelize.transaction(async (t) => {
				let tagCount = 0;
				while (req.body.articletags[tagCount] != '') {
					tagCount++;
				}
				Tag.destroy({where: {articleId: article.id},
					transaction: t});
				article = await article.save();
				for (let i = 0; i < tagCount; i++) {
					await article.createTag({
						articleId: article.id,
						main: (i == 0) ? true : false,
						name: req.body.articletags[i],
					});
				}
			});
			res.redirect(`/blog/post/${article.slug}`);
		} catch (e) {
			console.log(e);
			req.flash('error', 'The operation has failed, please try again');
			res.render(`admin/${path}`, {article: article});
		}
	};
}

export default router;