#!/usr/bin/env node

'use strict';

var fs = require('fs');
var argv = require('minimist')(process.argv.slice(2), {
  alias: {
    properties: ['p', 'props']
  },
  default: {
    properties: []
  }
});
var stdin = require('get-stdin');
var apartment = require('..');
var ok;

if (typeof argv.properties === 'string') {
  argv.p = argv.props = argv.properties = argv.properties.split(',');
}

if (argv._.length) {
  go(read(argv._[0]));
} else {
  stdin().then(go);
  setTimeout(die, 100);
}

function read (file) {
  return fs.readFileSync(file, { encoding: 'utf8' });
}

function go (data) {
  ok = true;
  var diff = apartment(data, argv);
  process.stdout.write(diff);
  process.exit();
}

function die () {
  if (ok) {
    return;
  }
  console.log([
    'usage:',
    '  apartment <file> [OPTIONS]',
    '    --properties <props>,   a comma-separated list of properties to remove',
    'result:',
    '  <diff>'
  ].join('\n'));
  process.exit();
}