import {css, html, LitElement} from 'lit';
import {map} from 'lit/directives/map.js';
import {unsafeHTML} from 'lit/directives/unsafe-html.js';

import {msg} from '../../../common/i18n';
import credits from '../../credits.json5';
import i18nCredits from '../../i18n-credits.json5';
import {DIALOG_STYLES} from '../../shared/dialog-styles';
import {SHARED_STYLES} from '../../shared/shared-styles';

export class CreditsDialog extends LitElement {
  static get styles() {
    return [
      SHARED_STYLES,
      DIALOG_STYLES,
      css`
        dialog {
          max-height: 430px;
          width: 400px;
        }

        dialog[open] {
          display: flex;
          flex-direction: column;
        }

        .content_area h4 {
          margin-bottom: 0;
        }

        .entry {
          position: relative;
        }

        .entry a.homepage {
          position: absolute;
          inset-inline-end: 16px;
          font-size: 14px;
        }

        p,
        span {
          font-size: 14px;
        }

        p.author {
          margin-top: 7px;
        }

        #translators .name {
          font-weight: bold;
        }

        .createdby {
          font-style: italic;
        }
      `,
    ];
  }

  constructor() {
    super();
    this.addEventListener('show-credits-dialog', this.showDialog);
  }

  render() {
    let translators = map(i18nCredits, contributor => {
      let languagesArray =
          contributor?.languages?.map?.(lang => lang?.name ?? 'undefined');
      let languages =
          languagesArray.length > 0 ? ': ' + languagesArray.join(', ') : '';
      return html`
        <li>
          <span class="name">${contributor?.name}</span>${languages}
        </li>
      `;
    });

    let homepageMsg = msg('options_credits_homepage');
    let creditsByMsg = msg('options_credits_by');

    let otherCredits = map(credits, c => {
      let url = c.url ? html`
            <a href=${c?.url} target="_blank" class="homepage">
              ${homepageMsg}
            </a>` :
                        undefined;
      let license = c.license ? ' - ' + c.license : '';
      let author = c.author ? html`
        <p class="author">
          ${creditsByMsg} ${c.author}${license}
        </p>
      ` :
                              undefined;

      return html`
        <div class="entry">
          ${url}
          <h4>${c?.name}</h4>
          ${author}
        </div>
      `;
    });

    return html`
      <dialog>
        <div class="scrollable">
          <h3>${msg('options_credits')}</h3>
          <div class="entry createdby">
            <div>${unsafeHTML(msg('options_credits_createdby'))}</div>
          </div>
          <div class="entry">
            <a href="https://gtranslate.avm99963.com/" class="homepage" target="_blank">
              ${msg('options_credits_homepage')}
            </a>
            <h4>${msg('options_credits_translations')}</h4>
            <div>${msg('options_credits_translations_paragraph')}</div>
            <ul id="translators">
              ${translators}
            </ul>
          </div>
          <div class="content_area">
            ${otherCredits}
          </div>
        </div>
        <div class="action_buttons">
          <button id="credits_ok" @click="${this.closeDialog}">
            ${msg('options_ok')}
          </button>
        </div>
      </dialog>
    `;
  }

  showDialog() {
    let dialog = this.renderRoot.querySelector('dialog');
    dialog.showModal();
    dialog.querySelector('.scrollable').scrollTo(0, 0);
    dialog.querySelector('#credits_ok').focus();
  }

  closeDialog() {
    this.renderRoot.querySelector('dialog').close();
  }
}
customElements.define('credits-dialog', CreditsDialog);