module.exports = function(eleventyConfig) {
  eleventyConfig.addPassthroughCopy("src/css"); // Copy css to site folder
  eleventyConfig.setServerOptions({
    host: "0.0.0.0",
    port: 80 
  });
  eleventyConfig.addWatchTarget("byTag"), (collection, tag) => {
    return collection.filter(item => item.data.tags && item.data.tags.includes(tag));
  };
  eleventyConfig.addFilter("filterTags", (tags) => {
    return (tags || []).filter(tag => !["recipe", "all", "nav"].includes(tag));
  });

  eleventyConfig.addCollection("recipesByTag", function(collectionApi) {
    const recipes = collectionApi.getFilteredByTag("recipe");
    const tagMap = {};

    recipes.forEach(recipe => {
      const customTags = (recipe.data.tags || []).filter(t => !["recipe", "all", "nav"].includes(t));
      const tagsToUse = customTags.length > 0 ? customTags : ["other"];
      
      tagsToUse.forEach(tag => {
        if (!tagMap[tag]) {
          tagMap[tag] = [];
        }
        tagMap[tag].push(recipe);
      });
    });

    return Object.keys(tagMap).sort().map(tag => ({
      tagName: tag,
      recipes: tagMap[tag].sort((a, b) => (a.data.title || "").localeCompare(b.data.title || ""))
    }));
  });

  eleventyConfig.addCollection("recipesByAuthor", function(collectionApi) {
    const recipes = collectionApi.getFilteredByTag("recipe");
    const authorMap = {};

    recipes.forEach(recipe => {
      const author = (recipe.data.author || "Unknown Cook").trim();
      if (!authorMap[author]) {
        authorMap[author] = [];
      }
      authorMap[author].push(recipe);
    });

    return Object.keys(authorMap).sort().map(author => ({
      authorName: author,
      recipes: authorMap[author].sort((a, b) => (a.data.title || "").localeCompare(b.data.title || ""))
    }));
  });

  return {
    dir: {
      input: "src",          // Where your markdown files live
      output: "_site",       // Where the built HTML goes
      layouts: "_layouts"    // Where your HTML templates live
    }
  };
};