#!/usr/bin/env node
var path = require('path');
var bump = require('bump-version');
var unreleased = require('unreleased');
var fs = require('fs');

function run(cmd, done) {
  var exec = require('child_process').exec;
  var proc = exec(cmd, function (err) {
    if (err) {
      run('git checkout .', function () {
        process.exit(1);
      });
    }
    done();
  });
  proc.stdout.pipe(process.stdout);
  proc.stderr.pipe(process.stderr);
}

try {
  var rootDir = path.resolve(__dirname, '..');
  var res = bump(rootDir, process.argv.pop());

  var versionFile = 'module.exports = { str: "' + res.version + '" };\n';
  fs.writeFileSync(__dirname + '/../version.js', versionFile);

  unreleased(res.version, rootDir, 'auth0/auth0.js', function (err, changelog) {
    if (err) { return process.exit(1); }

    changelog = new Buffer(changelog + '\n\n');
    var file = path.join(rootDir, 'CHANGELOG.md');

    var data = fs.readFileSync(file); //read existing contents into data
    var fd = fs.openSync(file, 'w+');
    fs.writeSync(fd, changelog, 0, changelog.length); //write new data
    fs.writeSync(fd, data, 0, data.length); //append old data
    fs.close(fd);

    run('git add -A', function () {
      run('git commit -am "release: ' + res.version + '"', function () {
        process.exit(0);
      });
    });

  });

} catch (err) {
  console.error(err.message);
  process.exit(1);
}