/**
 * Butterfly
 * galleryGroup and gallery
 * {% galleryGroup [name] [descr] [url] [img] %}
 * {% gallery [lazyload],[rowHeight],[limit] %}
 * {% gallery url,[url],[lazyload],[rowHeight],[limit] %}
 */

'use strict'

const urlFor = require('hexo-util').url_for.bind(hexo)

function gallery (args, content) {
  const { data, languages } = hexo.theme.i18n
  args = args.join(' ').split(',')
  let rowHeight, limit, lazyload, type, dataStr

  if (args[0] === 'url') {
    [type, dataStr, lazyload, rowHeight = 220, limit = 10] = args // url,[link],[lazyload],[rowHeight],[limit]
  } else {
    [lazyload, rowHeight = 220, limit = 10] = args // [lazyload],[rowHeight],[limit]
    const regex = /!\[(.*?)\]\(([^\s]*)\s*(?:["'](.*?)["']?)?\s*\)/g
    let m
    const arr = []
    while ((m = regex.exec(content)) !== null) {
      if (m.index === regex.lastIndex) {
        regex.lastIndex++
      }
      arr.push({
        url: m[2],
        alt: m[1],
        title: m[3]
      })
    }

    dataStr = JSON.stringify(arr)
  }

  type = type ? ' url' : ' data'
  const lazyloadClass = lazyload === 'true' ? 'lazyload' : ''

  return `<div class="gallery">
    <div class="fj-gallery ${lazyloadClass + type}" data-rowHeight="${rowHeight}" data-limit="${limit}">
    <span class="gallery-data">${dataStr}</span>
    </div>
    <button class="gallery-load-more"><span>${data[languages[0]].load_more}</span><i class="fa-solid fa-arrow-down"></i></button>
    </div>`
}

function galleryGroup (args) {
  const name = args[0]
  const descr = args[1]
  const url = urlFor(args[2])
  const img = urlFor(args[3])

  return `
  <figure class="gallery-group">
  <img class="gallery-group-img no-lightbox" src='${img}' alt="Group Image Gallery">
  <figcaption>
  <div class="gallery-group-name">${name}</div>
  <p>${descr}</p>
  <a href='${url}'></a>
  </figcaption>
  </figure>
  `
}

hexo.extend.tag.register('gallery', gallery, { ends: true })
hexo.extend.tag.register('galleryGroup', galleryGroup)