const { DateTime } = require("luxon");

const pluginNavigation = require("@11ty/eleventy-navigation");

module.exports = function(eleventyConfig) {
  eleventyConfig.addPlugin(pluginNavigation);

  eleventyConfig.addPassthroughCopy("css");
  eleventyConfig.addPassthroughCopy("dl");
  eleventyConfig.addPassthroughCopy("images");

  eleventyConfig.addFilter("readableDate", dateObj => {
    return DateTime.fromJSDate(dateObj, {zone: 'utc'}).setLocale("fr").toFormat("dd LLL yyyy");
  });

  // https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#valid-date-string
  eleventyConfig.addFilter('htmlDateString', (dateObj) => {
    return DateTime.fromJSDate(dateObj, {zone: 'utc'}).toFormat('yyyy-LL-dd');
  });

// Get the first `n` elements of a collection.
  eleventyConfig.addFilter("head", (array, n) => {
    if (!Array.isArray(array) || array.length === 0) {
      return [];
    }
    if (n < 0) {
      return array.slice(n);
    }

    return array.slice(0, n);
  });

  eleventyConfig.addFilter("nlToBr", string => string.replaceAll('\n', '<br>'))

  return {
    // Pre-process *.md files with: (default: `liquid`)
    markdownTemplateEngine: "njk",

    // Pre-process *.html files with: (default: `liquid`)
    htmlTemplateEngine: "njk",
  }
}