const pluginRss = require("@11ty/eleventy-plugin-rss");

// module import filters
const {
  getDatetime,
  getMonthDay,
  getYear,
  toFullDate,
  renderSass,
  renderSassString,
} = require('./config/filters/index.js');

module.exports = eleventyConfig => {
    eleventyConfig.setUseGitIgnore(false);

    eleventyConfig.addPlugin(pluginRss);

    eleventyConfig.addWatchTarget('./src/assets');

    eleventyConfig.addCollection('posts', collection => {
      return [...collection.getFilteredByGlob('./src/posts/*.md')].reverse();
    });  
  
    eleventyConfig.addFilter("getDatetime", getDatetime)
    eleventyConfig.addFilter("getMonthDay", getMonthDay)
    eleventyConfig.addFilter("getYear", getYear)
    eleventyConfig.addFilter("toFullDate", toFullDate)
    eleventyConfig.addFilter("sass", renderSass)
    eleventyConfig.addFilter("sassInline", renderSassString)
    eleventyConfig.addFilter("getAllTags", collection => {
      let tagSet = new Set();
      for(let item of collection) {
        (item.data.tags || []).forEach(tag => tagSet.add(tag));
      }
      return Array.from(tagSet);
    });
    eleventyConfig.addFilter("limit", function (arr, limit) {
      return arr.slice(0, limit);
    });
   

    eleventyConfig.addLayoutAlias('base', 'base.njk');
    eleventyConfig.addLayoutAlias('home', 'home.njk');
    eleventyConfig.addLayoutAlias('blog', 'blog.njk');
    eleventyConfig.addLayoutAlias('post', 'post.njk');

    eleventyConfig.addShortcode('year', () => `${new Date().getFullYear()}`); // current year, stephanie eckles

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