<?php

namespace Lc\ShopBundle\Services ;

use Lc\ShopBundle\Services\Price\ProductPriceUtils;

class ProductFamilyUtils
{
        protected $productPriceUtils ;

        public function __construct(ProductPriceUtils $productPriceUtils)
        {
                $this->productPriceUtils = $productPriceUtils ;
        }

        public function getCheapestProduct($productFamily)
        {
                $productPriceUtils = $this->productPriceUtils ;
                return $this->getCheapestOrMostExpensiveProduct($productFamily, function ($a, $b) use ($productPriceUtils) {
                        return $productPriceUtils->getPriceWithTaxAndReduction($a) > $productPriceUtils->getPriceWithTaxAndReduction($b) ;
                }, true);
        }

        public function getCheapestProductByRefUnit($productFamily)
        {
                $productPriceUtils = $this->productPriceUtils ;
                return $this->getCheapestOrMostExpensiveProduct($productFamily, function ($a, $b) use ($productPriceUtils) {
                        return $productPriceUtils->getPriceByRefUnitWithTaxAndReduction($a) > $productPriceUtils->getPriceByRefUnitWithTaxAndReduction($b) ;
                }, false);
        }

        public function getMostExpensiveProductByRefUnit($productFamily)
        {
                $productPriceUtils = $this->productPriceUtils ;
                return $this->getCheapestOrMostExpensiveProduct($productFamily, function ($a, $b) use ($productPriceUtils) {
                        return $productPriceUtils->getPriceByRefUnitWithTaxAndReduction($a) < $productPriceUtils->getPriceByRefUnitWithTaxAndReduction($b) ;
                }, false);
        }

        private function getCheapestOrMostExpensiveProduct($productFamily, $comparisonFunction, $returnSelfIfNotActiveProducts)
        {
                $products = $productFamily->getProducts()->getValues() ;
                if (count($products) > 0) {
                        usort($products, $comparisonFunction);
                        return $products[0];
                }
                if ($returnSelfIfNotActiveProducts) {
                        return $productFamily;
                }
                else {
                        return false;
                }
        }

}