import { en } from './src/translations/en';
import { eo } from './src/translations/eo';
import { es } from './src/translations/es';
import { de } from './src/translations/de';
import { zh } from './src/translations/zh';
import { fr } from './src/translations/fr';
import { sv } from './src/translations/sv';
import { ru } from './src/translations/ru';
import { nl } from './src/translations/nl';
import { it } from './src/translations/it';
import fs from 'fs';

let readmePath = '../README.md';

let open = '<!-- translations -->';
let close = '<!-- translationsstop -->';

let readmeTxt = fs.readFileSync(readmePath, { encoding: 'utf8' });

let before = readmeTxt.split(open)[0];
let after = readmeTxt.split(close)[1];

let report = buildReport();

let alteredReadmeTxt = `${before}${open}\n\n${report}\n${close}${after}`;

fs.writeFileSync(readmePath, alteredReadmeTxt);

function buildReport(): string {
  let files = [
    { t: de, n: 'de' },
    { t: eo, n: 'eo' },
    { t: es, n: 'es' },
    { t: fr, n: 'fr' },
    { t: it, n: 'it' },
    { t: nl, n: 'nl' },
    { t: ru, n: 'ru' },
    { t: sv, n: 'sv' },
    { t: zh, n: 'zh' },
  ];
  let masterKeys = Object.keys(en.translation);

  let report = 'lang | done | missing\n';
  report += '--- | --- | ---\n';

  for (let file of files) {
    let keys = Object.keys(file.t.translation);
    let pct: number = (keys.length / masterKeys.length) * 100;
    let missing = difference(masterKeys, keys);
    report += `${file.n} | ${pct.toFixed(0)}% | ${missing} \n`;
  }

  return report;
}

function difference(a: Array<string>, b: Array<string>): Array<string> {
  return a.filter(x => !b.includes(x));
}