const path = require('path');
const fs = require('fs');
const CSS = require('css');
const { validDomainId } = require('./routes/utils');
const { promisify } = require('util');
const readFile = promisify(fs.readFile);
const readdir = promisify(fs.readdir);
const hasFlag = require('has-flag');

let errored = false;

function report(content, fix) {
  errored = true;
  console.error(content);
  if (fix && hasFlag('--fix')) fix();
}

(async () => {
  const users = await readdir('users');
  await users.forEach(async user => {
    if (!user.endsWith('json')) {
      report(`${user} is not a json file`, () =>
        fs.unlink(path.join('users', user), () => {})
      );
    }
    if (!validDomainId(user.replace('.json', ''))) {
      report(`${user} is not a valid domain id.`);
    }
    try {
      const data = await readFile(path.join('users', user), 'utf8');
      try {
        const u = JSON.parse(data);
        if (!u.locked && !u.copyright) {
          report(`Copyright not specified in ${user}`);
        }
        if (u.version) {
          report(`Version tag found in ${user}`, () => {
            delete u.version;
            const stringified = `${JSON.stringify(u, 0, 2)}\n`;
            fs.writeFile(path.join('users', user), stringified, () => {});
          });
        }
        if (typeof u.gravatar === 'string') {
          report(`Gravatar boolean encoded as string found in ${user}`, () => {
            u.gravatar = u.gravatar === 'true';
            const stringified = `${JSON.stringify(u, 0, 2)}\n`;
            fs.writeFile(path.join('users', user), stringified, () => {});
          });
        }
      } catch ({ message }) {
        report(`Invalid JSON in ${user} (${message})`);
      }
    } catch ({ message }) {
      report(`Unable to read ${user} (${message})`);
    }
  });

  const themes = await readdir('themes');
  await themes.forEach(async theme => {
    if (theme.endsWith('css')) {
      try {
        const data = await readFile(path.join('themes', theme), 'utf8');
        try {
          CSS.parse(data);
        } catch ({ message }) {
          report(`Invalid CSS in ${theme} (${message})`);
        }
      } catch ({ message }) {
        report(`Unable to read ${theme} (${message})`);
      }
    }
  });
  if (errored) process.exit(1);
})();