const checker = require('license-checker');
const request = require('request-promise-native');
const fs = require('fs');

checker.init({ start: './' }, async (err, packages) => {
  const csv = [];
  const process = Object.entries(packages).map(async ([packageName, info]) => {
    const sp = packageName.split('@');
    const version = sp.pop();
    const name = sp.join('@');
    const licenseFileName = info.licenseFile ? info.licenseFile.split('/').pop() : info.repository;
    let licenseFile = `${info.repository}/blob/master/${licenseFileName}`;
    try {
      await request.get(licenseFile);
    } catch (e) {
      if (![200, 429].includes(e.statusCode)) {
        licenseFile = info.repository;
      }
    }
    csv.push([name, version, info.licenses, licenseFile].join('\t'));
  });
  await Promise.all(process);
  fs.writeFileSync('lisences.csv', csv.join('\n'));
});