#!/usr/bin/env node (function() {

var fs = require('fs');
var path = require('path');
var parse = require('../parser').parse;
var jsesc = require('jsesc');
var regexes = process.argv.splice(2);
var first = regexes[0];
var data;
var log = console.log;
var flags = '';
var main = function() {
  if (/^(?:-h|--help|undefined)$/.test(first)) {
    log([
      '\nUsage:\n',
      '\tregjsparser [regex ...]',
      '\tregjsparser [-f | --flags] u [regex ...]',
      '\tregjsparser [-v | --version]',
      '\tregjsparser [-h | --help]',
      '\nExamples:\n',
      '\tregjsparser \'^foo.bar$\'',
      '\tregjsparser \'[a-zA-Z0-9]\''
    ].join('\n'));
    return process.exit(1);
  }

  if (/^(?:-v|--version)$/.test(first)) {
    log('v%s', require(path.resolve(__dirname, '../package.json')).version);
    return process.exit(1);
  }

  if (/^(?:-f|--flags)$/.test(first)) {
    flags = regexes[1];
    regexes = regexes.slice(2);
  }

  regexes.forEach(function(snippet) {
    try {
      result = parse(snippet, flags);
      log(jsesc(result, {
        'json': true,
        'compact': false,
        'indent': '\t'
      }));
    } catch(error) {
      log(error.message + '\n');
      log('Error: failed to parse. Make sure the regular expression is valid.');
      log('If you think this is a bug in regjsparser, please report it:');
      log('\thttps://github.com/jviereck/regjsparser/issues/new');
      log('\nStack trace:\n');
      log(error.stack);
      return process.exit(1);
    }
  });
  // Return with exit status 0 outside of the `forEach` loop, in case
  // multiple regular expressions were passed in.
  return process.exit(0);
};

main();

}());