import * as DataEvent from '../../src/com/events/DataEvent';
import sanitize from 'sanitize-html';
import StringUtils from '../../src/com/utils/StringUtils';
import fs from 'fs-extra';
const pug = require('pug');
const md = require('markdown-it')('commonmark');

export default class Render {
	//--------------------------
	// constructor
	//--------------------------
	constructor() {}
	//--------------------------
	// methods
	//--------------------------
	start() {}

	/**
	 * Renders all pages from markdown to html
	 * @parameter theme: current theme being used as defined in settings
	 */
	publishAll(theme) {
		return new Promise((resolve, reject) => {
			this.getPage()
				.then(pages => {
					let response = [];
					for (let index = 0; index < pages.length; index++) {
						const page = pages[index];
						if (page.metadata.layout === 'index') {
							let buffed = sanitize(page.content, {
								allowedTags: ['del', 'a', 'iframe', 'img'],
								allowedAttributes: {
									a: ['href', 'name', 'target'],
									img: ['src'],
									iframe: [
										'height',
										'width',
										'src',
										'frameborder',
										'allow',
										'allowfullscreen'
									]
								}
							});

							buffed = new StringUtils().decodeHTML(buffed);
							let html = md.render(buffed, { html: true, xhtmlOut: true });
							let file = pug.renderFile('content/themes/' + theme + '/index.pug', {
								title: page.metadata.title,
								default_bg: page.metadata.feature,
								content_index: html
							});

							fs.writeFile('public/index.html', file, err => {
								// throws an error, you could also catch it here

								if (err) {
									response = { type: DataEvent.PAGES_NOT_RENDERED, message: err };
									reject(response);
								}

								// success case, the file was saved
								response = {
									type: DataEvent.PAGES_RENDERED,
									message: 'All Pages Rendered. Sweet.'
								};
								resolve(response);
							});
						}
					}
				})
				.catch(err => {
					reject(err);
				});
		});
	}

	//--------------------------
	// event handlers
	//--------------------------
}