#!/usr/bin/env node

var fs = require('fs');
var path = require('path');
var semver = require('semver');
var request = require('request');
var exec = require('child_process').exec;

var url = 'https://raw.github.com/rogerwang/node-webkit/master/README.md';
var pkgpath = path.join(__dirname, '..', 'package.json');

// Download README file
var readme = request(url);
var data = '';
readme.on('data', function(buf) { data += buf; });
readme.on('end', function() {
  var version = semver.clean(/\[v([^\s]+)\s+release notes\]/i.exec(data)[1]);
  // Version invalid so quit
  if (!semver.valid(version)) {
    console.error('INVALID VERSION: ' + version);
    process.exit();
  }
  var pkg = require(pkgpath);
  var currentversion = pkg.version;
  if (semver.gt(version, pkg.version)) {
    // Write new version to package.json
    pkg.version = version;
    fs.writeFileSync(pkgpath, JSON.stringify(pkg, null, 2));

    console.log('PUBLISHING NEW VERSION ' + version);

    var cmd = [
      'git add package.json',
      'git commit -m "v' + version + '"',
      'git push origin master',
      'npm publish',
    ].join(' && ');
    exec(cmd, { cwd: path.resolve(__dirname, '..') }, function(err, stdout, stderr) {
      if (err || stderr) {
        // Revert package.json change and try again next time
        console.error('FAILED');
        console.error(err || stderr);
        pkg.version = currentversion;
        fs.writeFileSync(pkgpath, JSON.stringify(pkg, null, 2));
        // TODO: Should revert commit here as well
      } else {
        console.log('SUCCESS');
      }
    });
  }
});