class TrailerCategory extends Page {
   
   static $has_many = array('Trailers' => 'Trailer');

   static $singular_name = 'TrailerCategory';
   static $plural_name = 'TrailerCategories';
   
   function getCMSFields() {
      $fields = parent::getCMSFields();
      $trailersTable = new DataObjectManager($this, 'Trailers','Trailer',
         array('getThumbnail' => _t('ProductCategory.PREVIEW'),'Title' => _t('ProductCategory.TITLE')),'getCMSFields_forPopup');

      $trailersTable->setParentClass('TrailerCategory');

      $fields->addFieldToTab('Root.Content.Trailers', $trailersTable);
      $wheelType = new DataObjectManager($this,_t('WheelType.LABEL'),'WheelType');
      $fields->addFieldToTab('Root.Content.WheelType', $wheelType);
      return    $fields;
   }
}

class TrailerCategory_Controller extends Page_Controller {}

class Product extends DataObject {
   static $singular_name = 'Product';
   static $plural_name = 'Products';
   
   static $db = array(
      'Title' => 'Text',
      'Price' => 'Currency',
      'Description' => 'HTMLText',
      'TopProduct' => 'Boolean'
   );

   static $has_one = array(
      'Image' => 'Image'
   );
   
   static $has_many = array(
      'ProductImages' => 'ProductImage'
   );
   
   public function getCMSFields_forPopup()
   {
      $fields = new FieldSet(
         new TextField('Title', 'Product Title'),
         new CurrencyField('Price', 'Price'),
         new SimpleWysiwygField ('Description', 'Product Description'),
         new CheckboxField('TopProduct', 'Top product')
      );
      
      $imageDataObject = new ImageDataObjectManager($this, 'ProductImages','ProductImage', 'Attachment');
      $imageDataObject->setAllowedFileTypes(array('jpg','gif','png'));
      $imageDataObject->setBrowseButtonText('Upload (JPG,GIF,PNG)');
      $imageDataObject->setPluralTitle('Images');
      
      $fields->push($imageDataObject);
      
      return $fields;
   }
   
   function getThumbnail(){
      if($images = DataObject::get_one("ProductImage", "ProductId = {$this->ID}"))
      return ($img = $images->Attachment()) ? $images->Thumbnail() : "no image";
      return "no image";
   }
}

class Product_Controller extends Page_Controller {
}

class Trailer extends Product {
   static $singular_name = 'Trailer';
   static $plural_name = 'Trailers';

   static $has_one = array(   
      'TrailerStuff' => 'TrailerStuff',
      'TrailerCategory' => 'TrailerCategory'
   );

   public function getCMSFields_forPopup()   {
      $fields = parent::getCMSFields_forPopup();
      $trailerStuff = new DataObjectManager($this,'TrailerStuff','TrailerStuff');
      $fields->push($trailerStuff);
      return $fields;
   }
      
}
class Trailer_Controller extends Product_Controller {
}

class TrailerStuff extends DataObject {   
   static $db = array(
      'GrossWeight' => 'Int',
      'TrailerWeight' => 'Int',
      'LoadWeight' => 'Int',
      'Length' => 'Int',
      'Axels' => 'Int',
      'Brake' => 'Boolean',
      'TopProduct' => 'Boolean',
   );
   
   static $has_one = array(
      'Trailer' => 'Trailer',
      'WheelType' => 'WheelType'
   );   

   function getCMSFields() {      
      $wheelType = Dataobject::get("WheelType");
      if ($wheelType) {
         $wheelType = $wheelType->toDropdownMap('ID', 'Type');
      }
      
      $fields = new FieldSet(
         new NumericField('GrossWeight', 'Gross Weight'),
         new NumericField('TrailerWeigh', 'Trailer Weight'),
         new NumericField('LoadWeight', 'Load Weight'),
         new NumericField('Width', 'Width'),
         new NumericField('Length', 'Length'),
         new NumericField('Axels', 'Axels'),
         new CheckboxField('Brake', 'Brake'),         
         new DropdownField(
            'WheelTypeID',
            'Please choose a wheel type',
            $wheelType)
      );
      return $fields;
   }
}

class WheelType extends DataObject {   
   static $db = array(
      'Type' => 'Text',
   );
   
   
   static $has_one = array(
      'TrailerStuff' => 'TrailerStuff'
   );   

   function getCMSFields() {      
      $fields = new FieldSet(
         new TextField('Type', 'Wheel type')         
      );
      return $fields;
   }
}