#!/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, done);
  proc.stdout.pipe(process.stdout);
  proc.stderr.pipe(process.stderr);
}

function replaceDistScriptNames(str, scriptName, version, bumpedVersion) {
  var v = version.split(".");
  var vb = bumpedVersion.split(".");
  var regExp = new RegExp(scriptName + "-" + v[0] + "(\." + v[1] + ")?(\." + v[2] + ")?(\.min)?.js", "g");

  return str.replace(regExp, function (_, minor, patch, min) {
    var r = [scriptName + "-" + vb[0]];
    if (minor) r.push(vb[1]);
    if (patch) r.push(vb[2]);
    if (min) r.push("min");
    r.push("js");
    return r.join(".");
  });
}

function replaceDistScriptNamesInFile(filePath, scriptName, version, bumpedVersion) {
  var str = fs.readFileSync(filePath, "utf8");
  var bumpedStr = replaceDistScriptNames(str, scriptName, version, bumpedVersion);
  fs.writeFileSync(filePath, bumpedStr);
}

try {
  var version = require('../package.json').version;
  var rootDir = path.resolve(__dirname, '..');
  var res = bump(rootDir, process.argv.pop());

  replaceDistScriptNamesInFile("README.md", "lock-passwordless", version, res.version);

  unreleased(res.version, rootDir, 'auth0/lock-passwordless', 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 commit -am "Release: ' + res.version + '"', function (err) {
      if (!err) { return process.exit(0); }

      // restore original status
      console.error(err.message);
      run('git checkout .', function (err) {
        if (err) { console.error(err.message); }
        process.exit(1);
      });
    });
  });

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