// Adapted version of https://github.com/Stremio/stremio-addon-sdk/blob/v1.6.2/src/landingTemplate.js
import { ManifestWithConfig } from './types';
import { envGet } from './utils';

const STYLESHEET = `
* {
  box-sizing: border-box;
}

body,
html {
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 100%;
}

body {
  padding: 2vh;
  font-size: 2.2vh;
}

html {
  background-size: auto 100%;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  box-shadow: inset 0 0 0 2000px rgb(0 0 0 / 60%);
}

body {
  display: flex;
  font-family: 'Open Sans', Arial, sans-serif;
  color: white;
}

h1 {
  font-size: 4.5vh;
  font-weight: 700;
}

h2 {
  font-size: 2.2vh;
  font-weight: normal;
  font-style: italic;
  opacity: 0.8;
}

h3 {
  font-size: 2.2vh;
}

h1,
h2,
h3,
p {
  margin: 0;
  text-shadow: 0 0 1vh rgba(0, 0, 0, 0.15);
}

p {
  font-size: 1.75vh;
}

ul {
  font-size: 1.75vh;
  margin: 0;
  margin-top: 1vh;
  padding-left: 3vh;
}

a {
  color: white
}

a.install-link {
  text-decoration: none
}

button {
  border: 0;
  outline: 0;
  color: white;
  background: #8A5AAB;
  padding: 1.2vh 3.5vh;
  margin: auto;
  text-align: center;
  font-family: 'Open Sans', Arial, sans-serif;
  font-size: 2.2vh;
  font-weight: 600;
  cursor: pointer;
  display: block;
  box-shadow: 0 0.5vh 1vh rgba(0, 0, 0, 0.2);
  transition: box-shadow 0.1s ease-in-out;
}

button:hover {
  box-shadow: none;
}

button:active {
  box-shadow: 0 0 0 0.5vh white inset;
}

#addon {
  width: 40vh;
  margin: auto;
}

.logo {
  height: 14vh;
  width: 14vh;
  margin: auto;
  margin-bottom: 3vh;
}

.logo img {
  width: 100%;
}

.name, .version {
  display: inline-block;
  vertical-align: top;
}

.name {
  line-height: 5vh;
  margin: 0;
}

.version {
  position: relative;
  line-height: 5vh;
  opacity: 0.8;
  margin-bottom: 2vh;
}

.contact {
  position: absolute;
  left: 0;
  bottom: 4vh;
  width: 100%;
  text-align: center;
}

.contact a {
  font-size: 1.4vh;
  font-style: italic;
}

.separator {
  margin-bottom: 4vh;
}

.form-element {
  margin-bottom: 2vh;
}

.label-to-top {
  margin-bottom: 2vh;
}

.label-to-right {
  margin-left: 1vh !important;
}

.full-width {
  width: 100%;
}
`;

export function landingTemplate(manifest: ManifestWithConfig) {
  const background = manifest.background || 'https://dl.strem.io/addon-background.jpg';
  const logo = manifest.logo || 'https://dl.strem.io/addon-logo.png';
  const contactHTML = manifest.contactEmail
    ? `<div class="contact">
      <p>Contact ${manifest.name} creator:</p>
      <a href="mailto:${manifest.contactEmail}">${manifest.contactEmail}</a>
    </div>`
    : '';

  const stylizedTypes = manifest.types
    .map(types => types.charAt(0).toUpperCase() + types.slice(1) + (types !== 'series' ? 's' : ''));

  let formHTML = '';
  let script = '';

  if ((manifest.config || []).length) {
    let options = '';
    manifest.config.forEach((elem) => {
      const key = elem.key;
      if (['text', 'number', 'password'].includes(elem.type)) {
        const isRequired = elem.required ? ' required' : '';
        const defaultHTML = elem.default ? ` value="${elem.default}"` : '';
        const inputType = elem.type;
        options += `
        <div class="form-element">
          <div class="label-to-top">${elem.title}</div>
          <input type="${inputType}" id="${key}" name="${key}" class="full-width"${defaultHTML}${isRequired}/>
        </div>
        `;
      } else if (elem.type === 'checkbox') {
        const isChecked = elem.default === 'checked' ? ' checked' : '';
        options += `
        <div class="form-element">
          <label for="${key}">
            <input type="checkbox" id="${key}" name="${key}"${isChecked}> <span class="label-to-right">${elem.title}</span>
          </label>
        </div>
        `;
      } else if (elem.type === 'select') {
        const defaultValue = elem.default || (elem.options || [])[0];
        options += `<div class="form-element">
        <div class="label-to-top">${elem.title}</div>
        <select id="${key}" name="${key}" class="full-width">
        `;
        const selections = elem.options || [];
        selections.forEach((el) => {
          const isSelected = el === defaultValue ? ' selected' : '';
          options += `<option value="${el}"${isSelected}>${el}</option>`;
        });
        options += `</select>
               </div>
               `;
      }
    });
    if (options.length) {
      formHTML = `
      <form class="pure-form" id="mainForm">
        ${options}
      </form>

      <div class="separator"></div>
      `;
      script += `
      installLink.onclick = () => {
        return mainForm.reportValidity()
      }
      const updateLink = () => {
        const config = Object.fromEntries(new FormData(mainForm))
        installLink.href = 'stremio://' + window.location.host + '/' + encodeURIComponent(JSON.stringify(config)) + '/manifest.json'
      }
      mainForm.onchange = updateLink
      `;
    }
  }

  return `
  <!DOCTYPE html>
  <html style="background-image: url(${background});" lang="en">

  <head>
    <meta charset="utf-8">
    <title>${manifest.name} - Stremio Addon</title>
    <style>${STYLESHEET}</style>
    <link rel="shortcut icon" href="${logo}" type="image/x-icon">
    <link href="https://fonts.googleapis.com/css?family=Open+Sans:400,600,700&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/purecss@2.1.0/build/pure-min.css" integrity="sha384-yHIFVG6ClnONEA5yB5DJXfW2/KC173DIQrYoZMEtBvGzmf0PKiGyNEqe9N6BNDBH" crossorigin="anonymous">
  </head>

  <body>
    <div id="addon">
      <div class="logo">
      <img src="${logo}" alt="logo">
      </div>
      <h1 class="name">${manifest.name}</h1>
      <h2 class="version">v${manifest.version || '0.0.0'}</h2>
      <h2 class="description">${manifest.description || ''}</h2>

      <div class="separator"></div>

      <p>
        The source code can be found on <a href="https://github.com/webstreamr/webstreamr" target="_blank">GitHub</a>.
      </p>

      <div class="separator"></div>

      ${envGet('CONFIGURATION_DESCRIPTION') || ''}

      <div class="separator"></div>

      <h3 class="gives">This addon has more :</h3>
      <ul>
      ${stylizedTypes.map(t => `<li>${t}</li>`).join('')}
      </ul>

      <div class="separator"></div>

      ${formHTML}

      <a id="installLink" class="install-link" href="#">
      <button name="Install">INSTALL</button>
      </a>
      ${contactHTML}
    </div>
    <script>
      ${script}

      if (typeof updateLink === 'function')
      updateLink()
      else
      installLink.href = 'stremio://' + window.location.host + '/manifest.json'
    </script>
  </body>

  </html>`;
}