const fs = require('fs/promises');
const path = require('path');
const { createDocument, $ } = require(path.join(__dirname, 'bits', 'psuedoframework'));
const fescriptpath = path.join(__dirname, 'bits', 'frontend.js');

const stylesheet = `
html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
}
*, *::before, *::after {
  box-sizing: border-box;
}
body {
  background-color: #000922;
  font-family: sans;
  color: white;
}
.wrapper, .wrapper table {
  width: 100%;
  border-collapse: collapse;
}
table tr:nth-child(odd) {
  background-color: #030a38;
}
tr {
  cursor: pointer;
}
.meta .file {
  font-weight: bold;
}
.meta .title, .meta .artist {
  font-size: .6rem;
}
input[type=checkbox] {
  width: 1.2rem;
  height: 1.2rem;
  border-radius: 8px;
}
button {
  font-size: 2rem;
  padding: 1.6rem 6rem;
  margin: 1rem;
  background-color: #1DB954;
  text-transform: uppercase;
  color: white;
  font-weight: bold;
  border: none;
  border-radius: 4rem;
  cursor: pointer;
  transition: background-color .15s linear;
}
button:hover {
  background-color: #25df67;
}
`;

async function getPreviousSelection() {
  let selection;
  try {
    selection = JSON.parse(await fs.readFile(path.join(__dirname, 'track-selection.json')));
  } catch (e) {
    selection = [];
  }
  return selection;
}

const checkCache = [];
function selectionContainsURI(list, uri) {
  if (list.length === 0) {
    return false;
  }

  // Only check a single one with the same spotify uri
  if (checkCache.includes(uri)) {
    return false;
  }

  const result = list.some((item) => item[1] === uri);
  if (result) {
    checkCache.push(uri);
  }

  return result;
}

async function generate() {
  const fescript = await fs.readFile(fescriptpath);
  const selection = await getPreviousSelection();
  const wrapper = $('div', null, ['wrapper']);
  const table = $('table');
  const header = $('thead', `
    <thead>
      <tr>
        <th>Choose</th>
        <th>Original File</th>
        <th>Type</th>
        <th>Album</th>
        <th>Title</th>
        <th>Artist</th>
        <th>Preview</th>
        <th>Meta</th>
      </tr>
    </thead>
  `);
  const tbody = $('tbody');
  const spotify = JSON.parse(await fs.readFile('spotify.json'));
  let rows = [];
  for (const entry of spotify) {
    let row = [];
    for (const sfItem of entry.spotify) {
      row.push([
        '<input type="checkbox" ' +
          `data-spotify="${sfItem.uri}" ` +
          `data-file="${entry.file}" ` +
          (selectionContainsURI(selection, sfItem.uri) ? 'checked' : '') +
        '>',
        '',
        sfItem.album.album_type,
        sfItem.album.name,
        sfItem.name,
        sfItem.artists.map((item) => item.name).join(', '),
        sfItem.preview_url ? `<audio preload="none" controls src="${sfItem.preview_url}"></audio>` : '',
        `<a href="${sfItem.uri}" target="_blank">` +
        `<img src="${sfItem.album.images[sfItem.album.images.length - 1].url}">` +
        '</a>'
      ]);
    }

    row[0][1] = $('div',
      $('span', path.basename(entry.file), ['file']) +
      '<br>' +
      $('span', `Title: ${entry.title}`, ['title']) +
      `<br>` +
      $('span', `Artist: ${entry.artist}`, ['artist']),
      ['meta']
    );

    rows.push(
      row.map(
        (rowItem) => $('tr',
          rowItem.map(
            (colItem) => $('td', colItem)
          ).join(''))
        ).join('')
    );
  }

  rows.forEach((item) => tbody.append(item));
  wrapper.append(table.append(header).append(tbody))
    .append(`<button id="export">Export selection</button>`)
    .append(`<script defer>${fescript}</script>`);
  await fs.writeFile('search-results.html', createDocument(stylesheet, wrapper));
}

generate().catch(console.error);