/*
  System bundles

  Allows a bundle module to be specified which will be dynamically 
  loaded before trying to load a given module.

  For example:
  SystemJS.bundles['mybundle'] = ['jquery', 'bootstrap/js/bootstrap']

  Will result in a load to "mybundle" whenever a load to "jquery"
  or "bootstrap/js/bootstrap" is made.

  In this way, the bundle becomes the request that provides the module
*/

(function() {
  // bundles support (just like RequireJS)
  // bundle name is module name of bundle itself
  // bundle is array of modules defined by the bundle
  // when a module in the bundle is requested, the bundle is loaded instead
  // of the form SystemJS.bundles['mybundle'] = ['jquery', 'bootstrap/js/bootstrap']
  hookConstructor(function(constructor) {
    return function() {
      constructor.call(this);
      this.bundles = {};
      this._loader.loadedBundles = {};
    };
  });

  // assign bundle metadata for bundle loads
  hook('locate', function(locate) {
    return function(load) {
      var loader = this;
      var matched = false;

      if (!(load.name in loader.defined))
        for (var b in loader.bundles) {
          for (var i = 0; i < loader.bundles[b].length; i++) {
            var curModule = loader.bundles[b][i];

            if (curModule == load.name) {
              matched = true;
              break;
            }

            // wildcard in bundles does not include / boundaries
            if (curModule.indexOf('*') != -1) {
              var parts = curModule.split('*');
              if (parts.length != 2) {
                loader.bundles[b].splice(i--, 1);
                continue;
              }
              
              if (load.name.substring(0, parts[0].length) == parts[0] &&
                  load.name.substr(load.name.length - parts[1].length, parts[1].length) == parts[1] &&
                  load.name.substr(parts[0].length, load.name.length - parts[1].length - parts[0].length).indexOf('/') == -1) {
                matched = true;
                break;
              }
            }
          }

          if (matched)
            return loader['import'](b)
            .then(function() {
              return locate.call(loader, load);
            });
        }

      return locate.call(loader, load);
    };
  });
})();