var fs = require('fs');
var path = require('path');

var {
  uniqueBy,
  sortBy
} = require('min-dash');


function TranslationReporter() {
  process.env.TRANSLATIONS = 'enabled';

  var translationsFile = path.join(__dirname, '../../docs/translations.json');

  var translations = [];


  this.onBrowserLog = function(browser, log, type) {

    if (log === undefined || typeof log !== 'string') {
      return;
    }

    if (log.substring(0, 1) === '\'') {
      log = log.substring(1, log.length - 1);
    }

    try {
      var obj = JSON.parse(log);

      if (obj.type === 'translations') {
        translations.push(obj.msg);
      }
    } catch (e) {
      return;
    }
  };


  this.onRunComplete = function() {
    translations = uniqueBy(function(e) { return e; }, translations);
    translations = sortBy(translations, function(e) { return e; });

    fs.writeFileSync(translationsFile, JSON.stringify(translations, null, 2));
  };
}

module.exports = {
  'reporter:translation-reporter' : [ 'type', TranslationReporter ]
};