/// <reference types="mdast" />
import { h } from 'hastscript'

/**
 * Creates a GitHub Card component.
 *
 * @param {Object} properties - The properties of the component.
 * @param {string} properties.repo - The GitHub repository in the format "owner/repo".
 * @param {import('mdast').RootContent[]} children - The children elements of the component.
 * @returns {import('mdast').Parent} The created GitHub Card component.
 */
export function GithubCardComponent(properties, children) {
 if (Array.isArray(children) && children.length !== 0)
  return h("div",
    { class: 'hidden' },
    ['Invalid directive. ("github" directive must be leaf type "::github{repo="owner/repo"}")']
  );

 if (!properties.repo || !properties.repo.includes("/"))
  return h("div",
    { class: 'hidden' },
    'Invalid repository. ("repo" attributte must be in the format "owner/repo")'
  );

  const repo = properties.repo;
  const cardUuid = `GC${Math.random().toString(36).slice(-6)}` // Collisions are not important

  const nAvatar = h(
    `div#${cardUuid}-avatar`,
    { class: "gc-avatar"},
  )
  const nLanguage = h(
    `span#${cardUuid}-language`,
    { class: "gc-language" },
    "Waiting..."
  )

  const nTitle = h(
    `div`,
    { class: "gc-titlebar" },
    [
      h("div", { class: "gc-titlebar-left"}, [
        h("div", { class: "gc-owner" }, [
            nAvatar,
            h("div", { class: "gc-user" }, repo.split("/")[0] ),
        ]),
        h("div", { class: "gc-divider" }, "/" ),
        h("div", { class: "gc-repo" }, repo.split("/")[1] )
      ]),
      h("div", { class: "github-logo"})
    ]
  )

  const nDescription = h(
    `div#${cardUuid}-description`,
    { class: "gc-description" },
    "Waiting for api.github.com..."
  )

  const nStars = h(
    `div#${cardUuid}-stars`,
    { class: "gc-stars" },
    "00K"
  )
  const nForks = h(
    `div#${cardUuid}-forks`,
    { class: "gc-forks" },
    "0K"
  )
  const nLicense = h(
    `div#${cardUuid}-license`,
    { class: "gc-license" },
    "0K"
  )

  const nScript = h(
    `script#${cardUuid}-script`,
    { type: "text/javascript", defer: true },
    `
      fetch('https://api.github.com/repos/${repo}', { referrerPolicy: "no-referrer" }).then(response => response.json()).then(data => {
        document.getElementById('${cardUuid}-description').innerText = data.description.replace(/:[a-zA-Z0-9_]+:/g, '');
        document.getElementById('${cardUuid}-language').innerText = data.language;
        document.getElementById('${cardUuid}-forks').innerText = Intl.NumberFormat('en-us', { notation: "compact", maximumFractionDigits: 1 }).format(data.forks).replaceAll("\u202f", '');
        document.getElementById('${cardUuid}-stars').innerText = Intl.NumberFormat('en-us', { notation: "compact", maximumFractionDigits: 1 }).format(data.stargazers_count).replaceAll("\u202f", '');
        const avatarEl = document.getElementById('${cardUuid}-avatar');
        avatarEl.style.backgroundImage = 'url(' + data.owner.avatar_url + ')';
        avatarEl.style.backgroundColor = 'transparent';
        if (data.license?.spdx_id) {
          document.getElementById('${cardUuid}-license').innerText = data.license?.spdx_id
        } else {
          document.getElementById('${cardUuid}-license').classList.add = "no-license"
        };
          document.getElementById('${cardUuid}-card').classList.remove("fetch-waiting");
          console.log("[GITHUB-CARD] Loaded card for ${repo} | ${cardUuid}.")
      }).catch(err => {
        const c = document.getElementById('${cardUuid}-card');
        c.classList.add("fetch-error");
         console.warn("[GITHUB-CARD] (Error) Loading card for ${repo} | ${cardUuid}.")
      })
    `
  )

  return h(`a#${cardUuid}-card`,
    { class: "card-github fetch-waiting no-styling",
      href: `https://github.com/${repo}`,
      target: '_blank',
      repo },
    [
      nTitle,
      nDescription,
      h("div",
        { class: "gc-infobar" },
        [nStars, nForks, nLicense, nLanguage]
      ),
      nScript
    ]
  );
}