/*
 * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
 *
 * SPDX-License-Identifier: AGPL-3.0-only
 */

import { RegexOptions } from '../../../../external-types/markdown-it-regex/interface'

const protocolRegex = /(?:http(?:s)?:\/\/)?/
const subdomainRegex = /(?:www.)?/
const pathRegex = /(?:youtube(?:-nocookie)?\.com\/(?:[^\\/]+\/.+\/|(?:v|e(?:mbed)?)\/|.*[?&]v=)|youtu\.be\/)/
const idRegex = /([^"&?\\/\s]{11})/
const tailRegex = /(?:[?&#].*)?/
const youtubeVideoUrlRegex = new RegExp(`(?:${protocolRegex.source}${subdomainRegex.source}${pathRegex.source}${idRegex.source}${tailRegex.source})`)
const linkRegex = new RegExp(`^${youtubeVideoUrlRegex.source}$`, 'i')

export const replaceYouTubeLink: RegexOptions = {
  name: 'youtube-link',
  regex: linkRegex,
  replace: (match) => {
    // ESLint wants to collapse this tag, but then the tag won't be valid html anymore.
    // noinspection CheckTagEmptyBody
    return `<app-youtube id="${match}"></app-youtube>`
  }
}