// HTML minification
const htmlmin = require("html-minifier");

// CSS minification
const CleanCSS = require("clean-css");

// JS minification
const { minify } = require("terser");

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

// Start Eleventy Configuration
module.exports = function (eleventyConfig) {
  eleventyConfig.addTransform("htmlmin", function (content, outputPath) {
    if (outputPath && outputPath.endsWith(".html")) {
      let minified = htmlmin.minify(content, {
        useShortDoctype: true,
        removeComments: true,
        collapseWhitespace: true,
      });
      return minified;
    }

    return content;
  });

  eleventyConfig.addFilter("cssmin", function (code) {
    return new CleanCSS({}).minify(code).styles;
  });

  eleventyConfig.addNunjucksAsyncFilter(
    "jsmin",
    async function (code, callback) {
      try {
        const minified = await minify(code);
        callback(null, minified.code);
      } catch (err) {
        console.error("Terser error: ", err);
        // Fail gracefully.
        callback(null, code);
      }
    },
  );

  eleventyConfig.addPlugin(eleventyNavigationPlugin);

  eleventyConfig.addPassthroughCopy("src/img");
  eleventyConfig.addPassthroughCopy("src/apple");
  eleventyConfig.addPassthroughCopy("src/favicon.ico");
  eleventyConfig.addPassthroughCopy("src/robots.txt");
  eleventyConfig.addPassthroughCopy("static");
  eleventyConfig.addPassthroughCopy({
    "static/ads.txt": "./ads.txt",
  });

  return {
    dir: {
      input: "src",
      output: "_site",
      data: "_data",
    },
    templateFormats: ["html", "njk", "md", "11ty.js"],
    markdownTemplateEngine: "njk",
    htmlTemplateEngine: "njk",
    dataTemplateEngine: false,
  };
};