const pluginRss = require("@11ty/eleventy-plugin-rss");
const markdownIt = require('./11ty/markdown.js');
const customShortcodes = require('./11ty/shortcodes.js');

const {
  getDatetime,
  getMonthDay,
  getYear,
  toFullDate,
} = require("./src/filters/date.js")

module.exports = config => {
  config.watchIgnores.add("/src/scss/components/config/_palette.scss.njk");
  config.watchIgnores.add("/src/scss/components/config/_palette.scss");

  config.setUseGitIgnore(false);
  config.setLibrary('md', markdownIt);

  config.addPlugin(pluginRss);

  config.addFilter("getDatetime", getDatetime)
  config.addFilter("getMonthDay", getMonthDay)
  config.addFilter("getYear", getYear)
  config.addFilter("toFullDate", toFullDate)

  config.addShortcode('fetch', customShortcodes.fetch);
  config.addPairedShortcode('full', customShortcodes.full);

  config.addPassthroughCopy({"./src/_includes/js/" : "/js"});

  config.addLayoutAlias('home', 'layouts/home.html');
  config.addLayoutAlias('post', 'layouts/article.html');
  config.addLayoutAlias('list', 'layouts/list.html');

  config.addCollection('blog', collection => {
    return [...collection.getFilteredByGlob('./src/posts/*.md')].reverse();
  });

  // Return all the tags used in a collection
	config.addFilter("getAllTags", collection => {
		let tagSet = new Set();
		for(let item of collection) {
			(item.data.tags || []).forEach(tag => tagSet.add(tag));
		}
		return Array.from(tagSet);
	});

  return {
    markdownTemplateEngine: 'njk',
    dataTemplateEngine: 'njk',
    htmlTemplateEngine: 'njk',
    dir: {
      input: 'src',
      output: 'dist'
    }
  };
};