#!/usr/bin/env node
var prompt = require('prompt');
var fs = require('fs');
var exec = require('child_process').exec;

var schema = {
  properties: {
    version: {
      description: 'version? (old is '+version()+')',
      pattern: /^[0-9]\.[0-9]+\.[0-9](-.+)?/,
      message: 'Must be a valid semver string i.e. 1.0.2, 2.3.0-beta.1',
      required: true
    }
  }
};

prompt.start();

prompt.get(schema, function(err, result) {
  var rawVersion = result.version;
  var version = 'v'+rawVersion;
  updateJSON('package', rawVersion);
  updateJSON('bower', rawVersion);
  commit(version, function() {
    tag(version, function() {
      publish(version);
    })
  });
});

function commit(version, cb) {
  exec('git commit -am "release '+version+'"', execHandler(cb));
}

function tag(version, cb) {
  exec('git tag '+version, execHandler(cb));
}

function publish(version) {
  exec('git push origin master', execHandler());
  exec('git push origin '+version, execHandler());
  exec('npm publish', execHandler());
}

function execHandler(cb) {
  return function(err, stdout, stderr) {
    if (err) throw new Error(err);
    console.log(stdout);
    console.log(stderr);
    if (cb) cb();
  }
}

function updateJSON(pkg, version) {
  var path = './'+pkg+'.json';
  var json = readJSON(path);
  json.version = version;
  writeJSON(path, json);
}

function version() {
  try {
    return readJSON('./package.json').version;
  } catch(e) {
    console.log('Could not read package.json version');
  }
}

function readJSON(path) {
  try {
    return JSON.parse(fs.readFileSync(path).toString());
  } catch(e) {
    console.log('Could not read package.json version');
  }
}

function writeJSON(path, data) {
  fs.writeFileSync(path, JSON.stringify(data, null, 2));
}