#!/usr/bin/env node

// [start-readme]
//
// Run this script to get all broken docs.github.com links in github/github
//
// [end-readme]

import { getContents, getPathsWithMatchingStrings } from './helpers/git-utils.js'
import got from 'got'

if (!process.env.GITHUB_TOKEN) {
  console.error('Error! You must have a GITHUB_TOKEN set in an .env file to run this script.')
  process.exit(1)
}

main()

async function main() {
  const searchStrings = ['https://docs.github.com', 'GitHub help_url', 'GitHub developer_help_url']
  const foundFiles = await getPathsWithMatchingStrings(searchStrings, 'github', 'github')
  const searchFiles = [...foundFiles]
    .filter((file) => endsWithAny(['.rb', '.yml', '.yaml', '.txt', '.pdf', '.erb', '.js'], file))
    .filter(
      (file) =>
        !file.includes('test/') &&
        !file.includes('app/views/') &&
        !file.includes('config.') &&
        !file.includes('app/api/description/')
    )

  const docsLinksFiles = []
  const urlRegEx =
    /https?:\/\/(www\.)?[-a-zA-Z0-9@:%._+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_+.~#?&//=]*)/g

  for (const file of searchFiles) {
    const contents = await getContents('github', 'github', 'master', file)

    if (
      contents.includes('https://docs.github.com') ||
      contents.includes('GitHub.help_url') ||
      contents.includes('GitHub.developer_help_url')
    ) {
      const docsIndices = getIndicesOf('https://docs.github.com', contents)
      const helpIndices = getIndicesOf('GitHub.help_url', contents)
      helpIndices.push(...getIndicesOf('GitHub.developer_help_url', contents))
      if (docsIndices.length > 0) {
        docsIndices.forEach((numIndex) => {
          // Assuming we don't have links close to 500 characters long
          const docsLink = contents.substring(numIndex, numIndex + 500).match(urlRegEx)
          docsLinksFiles.push([docsLink[0].toString().replace(/[^a-zA-Z0-9]*$|\\n$/g, ''), file])
        })
      }

      if (helpIndices.length > 0) {
        helpIndices.forEach((numIndex) => {
          // There are certain links like #{GitHub.help_url}#{learn_more_path} and #{GitHub.developer_help_url}#{learn_more_path} that we should skip
          if (
            (contents.substring(numIndex, numIndex + 11) === 'GitHub.help' &&
              contents.charAt(numIndex + 16) === '#') ||
            (contents.substring(numIndex, numIndex + 16) === 'GitHub.developer' &&
              contents.charAt(numIndex + 26) === '#')
          ) {
            return
          }

          const startSearchIndex = contents.indexOf('/', numIndex)
          // Looking for the closest '/' after GitHub.developer_help_url or GitHub.help_url
          // There are certain links that don't start with `/` so we want to skip those.
          // If there's no `/` within 30 characters of GitHub.help_url/GitHub.developer_help_url, skip
          if (startSearchIndex - numIndex < 30) {
            const linkPath = contents
              .substring(
                startSearchIndex,
                regexIndexOf(
                  contents,
                  /\n|"\)|{@email_tracking_params}|\^http|Ahttps|example|This|TODO"|[{}|"%>