/**
 * Render github corner
 * @param  {Object} data URL for the View Source on Github link
 * @param {String} cornerExternalLinkTarge value of the target attribute of the link
 * @return {String} SVG element as string
 */
export function corner(data, cornerExternalLinkTarge) {
  if (!data) {
    return '';
  }

  if (!/\/\//.test(data)) {
    data = 'https://github.com/' + data;
  }

  data = data.replace(/^git\+/, '');
  // Double check
  cornerExternalLinkTarge = cornerExternalLinkTarge || '_blank';

  return (
    `<a href="${data}" target="${cornerExternalLinkTarge}" class="github-corner" aria-label="View source on Github">` +
    '<svg viewBox="0 0 250 250" aria-hidden="true">' +
    '<path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path>' +
    '<path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path>' +
    '<path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path>' +
    '</svg>' +
    '</a>'
  );
}

/**
 * Renders main content
 * @param {Object} config Configuration object
 * @returns {String} HTML of the main content
 */
export function main(config) {
  const name = config.name ? config.name : '';

  const aside =
    '<button class="sidebar-toggle" aria-label="Menu">' +
    '<div class="sidebar-toggle-button">' +
    '<span></span><span></span><span></span>' +
    '</div>' +
    '</button>' +
    '<aside class="sidebar">' +
    (config.name
      ? `<h1 class="app-name"><a class="app-name-link" data-nosearch>${
          config.logo ? `<img alt="${name}" src=${config.logo}>` : name
        }</a></h1>`
      : '') +
    '<div class="sidebar-nav"><!--sidebar--></div>' +
    '</aside>';
  return (
    `<main>${aside}` +
    '<section class="content">' +
    '<article class="markdown-section" id="main"><!--main--></article>' +
    '</section>' +
    '</main>'
  );
}

/**
 * Cover Page
 * @returns {String} Cover page
 */
export function cover() {
  const SL = ', 100%, 85%';
  const bgc =
    'linear-gradient(to left bottom, ' +
    `hsl(${Math.floor(Math.random() * 255) + SL}) 0%,` +
    `hsl(${Math.floor(Math.random() * 255) + SL}) 100%)`;

  return (
    `<section class="cover show" style="background: ${bgc}">` +
    '<div class="mask"></div>' +
    '<div class="cover-main"><!--cover--></div>' +
    '</section>'
  );
}

/**
 * Render tree
 * @param  {Array} toc Array of TOC section links
 * @param  {String} tpl TPL list
 * @return {String} Rendered tree
 */
export function tree(toc, tpl = '<ul class="app-sub-sidebar">{inner}</ul>') {
  if (!toc || !toc.length) {
    return '';
  }

  let innerHTML = '';
  toc.forEach(node => {
    const title = node.title.replace(/(<([^>]+)>)/g, '');
    innerHTML += `<li><a class="section-link" href="${node.slug}" title="${title}">${node.title}</a></li>`;
    if (node.children) {
      innerHTML += tree(node.children, tpl);
    }
  });
  return tpl.replace('{inner}', innerHTML);
}

export function helper(className, content) {
  return `<p class="${className}">${content.slice(5).trim()}</p>`;
}

export function theme(color) {
  return `<style>:root{--theme-color: ${color};}</style>`;
}
