/**
 * Check the integrity of `map.json` file.
 * - Error if `map.json` reference a markdown file that does not exist
 * - Error if a markdown file exists without reference in `map.json`
 */
import * as chalk from 'chalk';
import { readJsonSync } from 'fs-extra';
import * as glob from 'glob';

console.log(`${chalk.blue('i')} Documentation Map Check`);

const basePath = 'docs';
const sharedFilesPattern = 'shared/cli';

const readmePathList: string[] = glob
  .sync(`${basePath}/**/*.md`)
  .map((path: string) => path.split(basePath)[1])
  .map((path: string) => path.slice(1, -3)) // Removing first `/` and `.md`
  .filter((path: string) => !path.startsWith(sharedFilesPattern));

function filePathExtractor(file: any): string[] {
  const paths: string[] = [];

  function recur(curr): void {
    if (curr.isExternal) return; // Removing external links
    if (curr.itemList) {
      curr.itemList.forEach((ii) => {
        recur(ii);
      });
    } else {
      paths.push(curr.file);
    }
  }
  recur(file);
  return paths;
}

const mapPathList: string[] = readJsonSync(`${basePath}/map.json`, {
  encoding: 'utf8',
})
  .map((file: any) => filePathExtractor(file))
  .flat()
  .filter((item: string) => item.split('/').length > 1); // Removing "category" paths (not linked to a file)
const readmeMissList = readmePathList.filter((x) => !mapPathList.includes(x));
const mapMissList = mapPathList.filter((x) => !readmePathList.includes(x));

let scriptError = false;

if (!!readmeMissList.length) {
  console.error(
    chalk.red(
      "\n⚠️  Documentation files and 'map.json' file are out of sync!\n"
    )
  );
  console.log(readmeMissList.map((x) => x.concat('.md')).join('\n'));
  console.error(
    chalk.red(
      `\nSome documentation files exist without any reference in \'map.json\', make sure to add an entry.`
    )
  );
  scriptError = true;
} else {
  console.log(
    `${chalk.green('✓')} Markdown files are in sync with ${chalk.grey(
      'docs/maps.json'
    )}.`
  );
}

if (!!mapMissList.length) {
  console.log(
    `\n${chalk.red(
      'ERROR'
    )} The 'map.json' file and the documentation files are out of sync!\n`
  );
  console.log(mapMissList.map((x) => x.concat('.md')).join('\n'));
  console.log(
    `\n${chalk.red(
      'ERROR'
    )} The \'map.json\' file is linking documentation files that do not exist.`
  );
  scriptError = true;
} else {
  console.log(
    `${chalk.green(
      '✓'
    )} The 'map.json' file and the documentation files are in sync.`
  );
}

if (scriptError) {
  process.exit(1);
}