<?php
class Orange35_Colorpicker_Model_Observer
{

    const COLORPICKER_SECTION = 'colorpicker_section';

    public function onSaveAttribute(Varien_Event_Observer $observer)
    {
        $attribute = $observer->getData('attribute');
        $attributeId = $attribute->getData('attribute_id');
        $options = $attribute->getOption();
        $this->_deleteAttributeImages($options);
        $this->_saveAttribute($attributeId, $attribute->getData('orange35_is_colorpicker'));
        $this->_saveOptions($attributeId, $attribute->getOption());
        return $this;
    }

    public function onDeleteAttribute(Varien_Event_Observer $observer)
    {
        $attribute = $observer->getData('attribute');
        $attributeId = $attribute->getData('attribute_id');
        $items = $this->getColorsOptions($attributeId);
        foreach ($items as $item) {
            Mage::helper('orange35_colorpicker/image')->delete($item['option_id']);
        }
        Mage::helper('orange35_colorpicker/image')->deleteAttributeDirectory($attributeId);
        return $this;
    }

    public function addCustomLayoutConfigHandle(Varien_Event_Observer $observer)
    {
        /** @var $layout  Mage_Core_Model_Layout */
        $event = $observer->getEvent();
        $controllerAction = $event->getAction();
        $layout = $event->getLayout();
        if ($controllerAction && $layout && $controllerAction instanceof Mage_Adminhtml_System_ConfigController) {
            if ($controllerAction->getRequest()->getParam('section') == self::COLORPICKER_SECTION) {

                $layout->getUpdate()->addHandle('adminhtml_system_config_edit_orange35_colorpicker');
            }
        }
        return $this;
    }

    /**
     * Retrieve the product model
     *
     * @return Mage_Catalog_Model_Product $product
     */
    public function getProduct()
    {
        return Mage::registry('product');
    }

    /**
     * @param $attributeId
     * @return mixed
     */
    protected function getColorsOptions($attributeId)
    {
        $modelOption = Mage::getModel('orange35_colorpicker/option')->getCollection();
        $modelOption->addFieldToFilter('attribute_id', $attributeId);
        return $modelOption->getItems();
    }

    /**
     * Shortcut to getRequest
     *
     */
    protected function _getRequest()
    {
        return Mage::app()->getRequest();
    }

    /**
     * @param $attributeId
     * @param $colorPickerValue
     */
    protected function _saveAttribute($attributeId, $colorPickerValue)
    {
        $tagInfoModel = Mage::getModel('orange35_colorpicker/attribute');
        $tagInfoModel->addData(array('attribute_id' => $attributeId, 'is_colorpicker' => $colorPickerValue ? 1 : 0));
        $tagInfoModel->save();
    }

    /**
     * @param $attributeId
     * @param $options
     * @return $this|bool
     */
    protected function _saveOptions($attributeId, $options)
    {
        $modelOption = Mage::getModel('orange35_colorpicker/option');
        if (empty($options['orange35_color'])) {
            return false;
        }
        foreach ($options['orange35_color'] as $id => $option) {
            $item = array(
                'attribute_id' => $attributeId,
                'option_id' => $id,
                'color' => $options['orange35_color'][$id]
            );
            if (!empty($options['orange35_image'][$id])) {
                $item['image'] = $options['orange35_image'][$id];
            }
            $modelOption->addData($item);
            $modelOption->save();
        }
        return $this;
    }

    protected function _deleteAttributeImages($options)
    {
        if (empty($options) || empty($options['delete'])) {
            return $this;
        }
        foreach ($options['delete'] as $optionId => $isDelete) {
            if (!empty($isDelete)) {
                Mage::helper('orange35_colorpicker/image')->delete($optionId);
            }
        }
        return $this;
    }

    /**
     *
     * If product has "Multicolor" as the only Attribute Set
     * and number of all attributes sets for configurable product equals one
     * then change the view of product template view on custom
     * It is updating of xml used
     */
    public function oneAttributeChangeProductViewTemplate($observer)
    {

        $product = Mage::registry('current_product');

        /**
         * Return if it is not product page
         */
        if (!($product instanceof Mage_Catalog_Model_Product)) {
            return;
        }

        if (Mage::getStoreConfig('colorpicker_section/product_view_group/product_module_enable')) {

            $attributeSet = Mage::getModel('eav/entity_attribute_set')->load($product->getAttributeSetId());
            /**
             * Convert attribute set name to alphanumeric + underscore string
             */
            $attributeSetName = str_replace('-', '_', $product->formatUrlKey($attributeSet->getAttributeSetName()));

            // Collect options applicable to this configurable product
            if (!$product->isConfigurable()) {
                return;
            } else {
                $productAttributeOptions = $product->getTypeInstance(true)->getConfigurableAttributesAsArray($product);
                //$attributeOptions = array();
                if (sizeof($productAttributeOptions) == 1 && $productAttributeOptions[0]['attribute_code'] == "multicolor") {

                    /* @var $update Mage_Core_Model_Layout_Update */
                    $update = $observer->getEvent()->getLayout()->getUpdate();
                    $handles = $update->getHandles(); // Store all handles in a variable
                    $update->resetHandles(); // Remove all handles

                    /**
                     * Rearrange layout handles to ensure
                     * handle is added last
                     */
                    foreach ($handles as $handle) {
                        $update->addHandle($handle);
                    }

                    $update->addHandle('multicolor_display_options_template');
                }
            }
        }
    }
}