'use strict';

const { EleventyRenderPlugin } = require('@11ty/eleventy');
const syntaxHighlight = require('@11ty/eleventy-plugin-syntaxhighlight');
const { formatDistanceToNow, format } = require('date-fns');
const yaml = require('js-yaml');
const { LoremIpsum } = require('lorem-ipsum');
const markdown = require('markdown-it');
const markdownItAttrs = require('markdown-it-attrs');
const markdownDefList = require('markdown-it-deflist');
const typogrify = require('typogr');
const truncate = require('truncate-html');

/** @param {import('@11ty/eleventy').UserConfig} eleventyConfig */
module.exports = (eleventyConfig) => {
  eleventyConfig.addPassthroughCopy('source/assets/dist');
  eleventyConfig.addPassthroughCopy('source/assets/img');
  eleventyConfig.addPassthroughCopy('source/favicon.ico');

  eleventyConfig.setLiquidOptions({
    jsTruthy: true,
  });
  eleventyConfig.setUseGitIgnore(false);
  eleventyConfig.watchIgnores.add('source/_data/versionCache.json');

  const mdown = markdown({
    html: true,
    typographer: true,
  })
    .use(markdownDefList)
    .use(markdownItAttrs);

  eleventyConfig.setLibrary('md', mdown);
  eleventyConfig.addDataExtension('yml, yaml', (contents) =>
    yaml.load(contents),
  );

  // Shortcodes...
  const lorem = new LoremIpsum();
  eleventyConfig.addLiquidShortcode('lorem', (type, number = 1) => {
    switch (type) {
      case 'sentence':
      case 'sentences':
        return lorem.generateSentences(number);
      case 'paragraph':
      case 'paragraphs':
        return lorem.generateParagraphs(number);
      case 'word':
      case 'words':
        return lorem.generateWords(number);
    }
    return '';
  });

  // Paired shortcodes...
  eleventyConfig.addPairedLiquidShortcode('markdown', (content) =>
    mdown.render(content),
  );

  eleventyConfig.addPairedLiquidShortcode('markdownInline', (content) =>
    mdown.renderInline(content),
  );

  eleventyConfig.addPairedLiquidShortcode('typogr', (content) =>
    typogrify.typogrify(content),
  );

  // Filters...
eleventyConfig.addLiquidFilter('truncatePost', (post) => {
  return truncate(post, 250, { byWords: true });
})

  eleventyConfig.addLiquidFilter('formatBlogDate', (date) => {
    return format(new Date(date),'d MMMM yyyy');
  })

  eleventyConfig.addLiquidFilter('formatDistanceToNow', (date) => {
    return formatDistanceToNow(new Date(date));
  });

  eleventyConfig.addLiquidFilter('markdown', (content) =>
    mdown.render(content),
  );

  eleventyConfig.addLiquidFilter('markdownInline', (content) =>
    mdown.renderInline(content),
  );

  eleventyConfig.addLiquidFilter('typogr', (content) =>
    typogrify.typogrify(content),
  );

  eleventyConfig.addLiquidFilter('isTypedoc', (page) =>
    page.url.startsWith('/documentation/js-api/'),
  );

  eleventyConfig.addPlugin(EleventyRenderPlugin);
  eleventyConfig.addPlugin(syntaxHighlight);

  // settings
  return {
    dir: {
      input: 'source',
      includes: '_includes',
      layouts: '_layouts',
    },
  };
};