<?php
    /**
     * Get additional products from a brand in associated categories
     * @param $brand_id
     * @param $product_id
     * @param $category_ids
     * @return $collection
     */
    public function getMoreFromBrand($brand_id, $product_id, $category_ids=0, $platform='desktop') {

        // Determine platform for product list limit
        if ($platform == 'desktop') $limit = Mage::getStoreConfig('brand/brand_extended_config/desktop_qty');
        elseif ($platform == 'mobile') $limit = Mage::getStoreConfig('brand/brand_extended_config/mobile_qty');

        // Get product model, return products except $product_id
        $collection = Mage::getModel('brand/product')->getCollection()
            ->AddFieldToFilter('main_table.brand_id', $brand_id)
            ->AddFieldToFilter('main_table.product_id', array('nin' => $product_id));

        // Join the category table
        $collection->join(array('category_product' => 'catalog/category_product'), 'main_table.product_id = category_product.product_id','category_product.category_id');
        $collection->getSelect()->join(array('product_status' => 'catalog_product_entity_int'), 'main_table.product_id = product_status.entity_id', array('product_status.value'));
        $collection->getSelect()->join(array('product_entity' => 'catalog_product_entity'), 'product_entity.entity_id = product_status.entity_id', array('product_status.value'));
        $collection->AddFieldToFilter('product_status.attribute_id', array('eq' => array('96')));
        $collection->AddFieldToFilter('product_status.value', array('eq' => array('1')));

        // A product will contain an array of categories it lives in, use that array to get associated products by the brand
        if (count($category_ids) > 0) $collection->AddFieldToFilter('category_product.category_id', array('in' => array($category_ids)));

        $collection->getSelect()->group('main_table.product_id');
        $collection->getSelect()->order('RAND()');
        $collection->getSelect()->limit($limit);

        echo '<pre>';
        echo $collection->getSelect();
        print_r($collection->getData());
        exit;

        //die($collection->getSelect());
        return $collection;
    }