const async = require('neo-async'),
  git = require('./util/git'),
  semver = require('semver');

module.exports = function(grunt) {
  grunt.registerTask(
    'version',
    'Updates the current release version',
    function() {
      const done = this.async(),
        pkg = grunt.config('pkg'),
        version = grunt.option('ver');

      if (!semver.valid(version)) {
        throw new Error(
          'Must provide a version number (Ex: --ver=1.0.0):\n\t' +
            version +
            '\n\n'
        );
      }

      pkg.version = version;
      grunt.config('pkg', pkg);

      grunt.log.writeln('Updating to version ' + version);

      async.each(
        [
          [
            'lib/handlebars/base.js',
            /const VERSION = ['"](.*)['"];/,
            "const VERSION = '" + version + "';"
          ],
          [
            'components/bower.json',
            /"version":.*/,
            '"version": "' + version + '",'
          ],
          [
            'components/package.json',
            /"version":.*/,
            '"version": "' + version + '",'
          ],
          [
            'components/handlebars.js.nuspec',
            /<version>.*<\/version>/,
            '<version>' + version + '</version>'
          ]
        ],
        function(args, callback) {
          replace.apply(undefined, args);
          grunt.log.writeln('    - ' + args[0]);
          git.add(args[0], callback);
        },
        function() {
          grunt.task.run(['default']);
          done();
        }
      );
    }
  );

  function replace(path, regex, value) {
    let content = grunt.file.read(path);
    content = content.replace(regex, value);
    grunt.file.write(path, content);
  }
};