const Image = require("@11ty/eleventy-img");
const glob = require("glob-promise");

module.exports = function(eleventyConfig) {
  // Output directory: _site

  eleventyConfig.addCollection("galleryProjects", function (collectionApi) {
    return collectionApi.getFilteredByTag("gallery").sort(function (projectA, projectB) {
      // sort projects by weight (highest first)
      return projectB.data.weight - projectA.data.weight
    })
  })

  eleventyConfig.addCollection("otherProjects", function (collectionApi) {
    return collectionApi.getFilteredByTag("other").sort(function (projectA, projectB) {
      // sort projects by weight (highest first)
      return projectB.data.weight - projectA.data.weight
    })
  })

  // Copy `images/` to `_site/images`
  eleventyConfig.addPassthroughCopy("src/images");

  // Copy `css/fonts/` to `_site/css/fonts`
  // Keeps the same directory structure.
  eleventyConfig.addPassthroughCopy("src/fonts");
  
  // Copy css files to `_site/css`
  eleventyConfig.addPassthroughCopy("src/*.css");

  // Copy js files to `_site/scripts`
  eleventyConfig.addPassthroughCopy("src/scripts/*.js");

  // Copy website button to root
  eleventyConfig.addPassthroughCopy("src/paupowpow-button.png");
  

  eleventyConfig.addCollection('projectImages', async collectionApi => {
    let files = await glob('./src/images/projects/*/*.{png,jpeg,jpg}');
    
    let collection = files.map(imagePath => {
      return {
        path: imagePath.replace('./src',''),
        id: imagePath.replace('./src/images/projects/', '')  // * didn't work
      }
    });

    let collectionByFolder = {}

    // takes the entire list of image paths and splits it up by project
    for (let element of collection) {
      const segments = element.path.split('/')
      // get the /*/ part of projects/*/*.png
      const imageFolder = segments[segments.length - 2]
      // if no array exists, make one
      collectionByFolder[imageFolder] = collectionByFolder[imageFolder] || []
      collectionByFolder[imageFolder].push(element) 
    }

    return collectionByFolder;
  });
};