const Handlebars = require('handlebars');
const { mediaKind, safeJsonForScript, getPlayerPageTemplate, getPlayerClientNameScript, getPlayerPageOfflineScript, getPlayerPagePlaylistScript, getPlayerPageCommandsScript, getPlayerPageRenderingScript, getPlayerPagePlaybackScript, getPlayerPageScript, getPlayerRegionScripts, getPlayerOnboardingLandingScript, getPlayerOnboardingFormScript } = require('./render-helpers');
const { createThumbnailPreviewBootstrapScript } = require('./thumbnail-preview');
const { createPageAuthBundle, createPageFetchAuthScript } = require('../request-auth');

function renderPage(template, options) {
  return template({
    TITLE: options.title,
    BODY_CLASS: options.bodyClass || '',
    BODY: new Handlebars.SafeString(options.body || ''),
    SCRIPT_BLOCK: new Handlebars.SafeString(options.script || '')
  });
}

function getPlayerServiceWorkerRegistrationScript() {
  return [
    '<script>',
    '  if ("serviceWorker" in navigator) {',
    '    window.addEventListener("load", function () {',
    '      navigator.serviceWorker.register("/sw.js").catch(function () {',
    '        return null;',
    '      });',
    '    });',
    '  }',
    '</script>'
  ].join('');
}

function renderOnboardingLandingBody() {
  return [
    '<main class="onboarding-shell">',
    '  <section class="onboarding-card onboarding-card--landing">',
    '    <p class="onboarding-kicker">Pulse Signage</p>',
    '    <h1>Onboard this player</h1>',
    '    <p class="onboarding-copy">Choose an existing screen, name the client, and either scan the QR code or finish right here with a keyboard and mouse.</p>',
    '    <div class="onboarding-layout">',
    '      <div class="onboarding-qr-pane">',
    '        <div class="onboarding-qr-frame">',
    '          <img id="onboarding-qr" alt="Onboarding QR code" />',
    '        </div>',
    '        <div id="onboarding-status" class="onboarding-status">Preparing onboarding link...</div>',
    '      </div>',
    '      <form id="onboarding-local-form" class="onboarding-form onboarding-form--local">',
    '        <label>',
    '          <span>Client name</span>',
    '          <input name="clientName" type="text" maxlength="255" required placeholder="Lobby player" autocomplete="off" />',
    '        </label>',
    '        <label>',
    '          <span>Screen</span>',
    '          <select name="screenSlug" id="onboarding-screen-select" required>',
    '            <option value="">Loading screens...</option>',
    '          </select>',
    '        </label>',
    '        <button type="submit">Save client</button>',
    '        <div id="onboarding-message" class="onboarding-status"></div>',
    '      </form>',
    '    </div>',
    '  </section>',
    '</main>'
  ].join('');
}

function renderOnboardingFormBody(deviceId) {
  return [
    '<main class="onboarding-shell">',
    '  <section class="onboarding-card onboarding-card--form">',
    '    <p class="onboarding-kicker">Pulse Signage</p>',
    '    <h1>Name this client</h1>',
    '    <p class="onboarding-copy">Pick an existing screen and give this player a friendly name that will persist after refreshes.</p>',
    '    <form id="onboarding-form" class="onboarding-form">',
    '      <label>',
    '        <span>Client name</span>',
    '        <input name="clientName" type="text" maxlength="255" required placeholder="Lobby player" />',
    '      </label>',
    '      <label>',
    '        <span>Screen</span>',
    '        <select name="screenSlug" id="onboarding-screen-select" required>',
    '          <option value="">Loading screens...</option>',
    '        </select>',
    '      </label>',
    '      <input type="hidden" name="deviceId" value="' + Handlebars.escapeExpression(deviceId || '') + '" />',
    '      <button type="submit">Save client</button>',
    '      <div id="onboarding-message" class="onboarding-status"></div>',
    '    </form>',
    '  </section>',
    '</main>'
  ].join('');
}


function renderOnboardingLandingScript() {
  return getPlayerOnboardingLandingScript()();
}

function renderOnboardingFormScript(deviceId) {
  return getPlayerOnboardingFormScript()({
    DEVICE_ID_JSON: new Handlebars.SafeString(JSON.stringify(deviceId || ''))
  });
}

function renderPlayerPage(slug, initialData) {
  const onboardingScript = getPlayerClientNameScript()();
  const offlineScript = getPlayerPageOfflineScript()();
  const playlistScript = getPlayerPagePlaylistScript()();
  const commandScript = getPlayerPageCommandsScript()();
  const renderingScript = getPlayerPageRenderingScript()();
  const playbackScript = getPlayerPagePlaybackScript()();
  const serviceWorkerScript = getPlayerServiceWorkerRegistrationScript();
  const template = getPlayerPageTemplate();
  const hlsScriptTag = '<script src="/assets/vendor/hls.min.js"></script>';
  const pageAuthToken = createPageAuthBundle({ scope: 'player', slug: String(slug || '').trim() });
  const script = getPlayerPageScript()({
    SLUG_JSON: new Handlebars.SafeString(JSON.stringify(slug)),
    INITIAL_DATA_JSON: new Handlebars.SafeString(safeJsonForScript(initialData || null)),
    REGION_SCRIPTS: new Handlebars.SafeString(getPlayerRegionScripts())
  });

  return renderPage(template, {
    title: 'Screen ' + slug,
    body: '<div id="app"><div class="empty">Loading screen...</div></div>',
    script: createPageFetchAuthScript(pageAuthToken) + hlsScriptTag + serviceWorkerScript + createThumbnailPreviewBootstrapScript(initialData) + '<script>' + offlineScript + '</script>' + '<script>' + playlistScript + '</script>' + '<script>' + commandScript + '</script>' + '<script>' + renderingScript + '</script>' + '<script>' + playbackScript + '</script>' + onboardingScript + script
  });
}

function renderPlayerOnboardingLandingPage() {
  const pageAuthToken = createPageAuthBundle({ scope: 'onboarding' });
  return renderPage(getPlayerPageTemplate(), {
    title: 'Onboard player',
    bodyClass: 'onboarding-page',
    body: renderOnboardingLandingBody(),
    script: createPageFetchAuthScript(pageAuthToken) + getPlayerServiceWorkerRegistrationScript() + renderOnboardingLandingScript()
  });
}

function renderPlayerOnboardingFormPage(deviceId) {
  const pageAuthToken = createPageAuthBundle({ scope: 'onboarding', deviceId: String(deviceId || '').trim() });
  return renderPage(getPlayerPageTemplate(), {
    title: 'Onboard screen',
    bodyClass: 'onboarding-page',
    body: renderOnboardingFormBody(deviceId),
    script: createPageFetchAuthScript(pageAuthToken) + getPlayerServiceWorkerRegistrationScript() + renderOnboardingFormScript(deviceId)
  });
}

module.exports = {
  mediaKind,
  renderPlayerPage,
  renderPlayerOnboardingLandingPage,
  renderPlayerOnboardingFormPage
};