import * as DataEvent from '../../src/com/events/DataEvent';
import StringUtils from '../../src/com/utils/StringUtils';
import fs from 'fs-extra';
import sanitize from 'sanitize-html';
const config = require('../../site/settings.json');
const tags_list = require('../../site/tags.json');
const pug = require('pug');
const md = require('markdown-it')('commonmark');
const _ = require('lodash');
const moment = require('moment');

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

	/**
	 * Renders all pages from markdown to html
	 * @parameter pages: payload for site pages
	 * @parameter theme: current theme being used as defined in settings
	 */
	publishAll(pages, theme) {
		return new Promise((resolve, reject) => {
			let response = [];
			let count = _.filter(pages, page => {
				return page.metadata.deleted === false;
			}).length;
			let rendered = 0;
			for (let index = 0; index < pages.length; index++) {
				const page = pages[index];
				if (page.metadata.deleted === false) {
					let writeFile, template;
					let path =
						'public/' +
						moment(page.metadata.created).format('YYYY') +
						'/' +
						moment(page.metadata.created).format('MM') +
						'/';
					if (page.metadata.layout === 'index') {
						template = 'content/themes/' + theme + '/index.pug';
						writeFile = 'public/index.html';
					} else {
						writeFile = path + page.metadata.slug + '.html';
						template = 'content/themes/' + theme + '/page.pug';
					}

					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(template, {
						title: page.metadata.title,
						default_bg: page.metadata.feature,
						content: html,
						tags: page.metadata.tags,
						menu: config.menu
					});

					fs.ensureDir(path).then(() => {
						fs.writeFile(writeFile, 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
						});
					});
					rendered = ++rendered;
					if (rendered === count) {
						response = {
							type: DataEvent.PAGES_RENDERED,
							message: 'All Pages Rendered. Sweet.'
						};
						resolve(response);
					}
				} else {
					//don't render delete pages
				}
			}
		});
	}
	publishTags(pages) {
		return new Promise((resolve, reject) => {
			let tags = tags_list.tags;
			let renderList = [];
			for (let index = 0; index < tags.length; index++) {
				let tag = tags[index];
				//console.log('**TAG**', tag.tag_name);
				var pageList = [];
				for (let i = 0; i < pages.length; i++) {
					let page = pages[i];

					if (_.includes(page.metadata.tags, tag.tag_name)) {
						pageList.push({ title: page.metadata.title, slug: page.metadata.slug });
					}
				}
				renderList.push({ tag: tag.tag_name, tag_list: pageList, slug: tag.slug });
			}
			let response = [];
			for (let index = 0; index < renderList.length; index++) {
				let item = renderList[index];
				let file = pug.renderFile('content/themes/' + config.global.theme + '/tags.pug', {
					title: item.tag,
					default_bg: config.global.background,
					content_tags: 'THESE ARE TAGS',
					tag_list: item.tag_list
				});

				fs.writeFile('public/tags/' + item.slug + '.html', file, err => {
					// throws an error, you could also catch it here
					if (err) {
						response = { type: DataEvent.TAG_PAGES_NOT_RENDERED, message: err };
						reject(response);
					}
					// success case, the file was saved
					response = {
						type: DataEvent.TAG_PAGES_RENDERED,
						message: 'Tag Pages ready to go. Good job.'
					};
					resolve(response);
				});
			}
		});
	}

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