<?php

/**
 * Created by PhpStorm.
 * User: filip
 * Date: 5/16/16
 * Time: 1:13 PM.
 */

namespace Query;

class Price
{
    public static function selectRange($minAlias = 'min', $maxAlias = 'max')
    {
        return self::doSelectRange($minAlias, $maxAlias, 'COALESCE(pv.price, p.price)');
    }

    public static function selectProductRange($minAlias = 'min', $maxAlias = 'max')
    {
        return self::doSelectRange($minAlias, $maxAlias, 'p.price');
    }

    private static function doSelectRange($minAlias, $maxAlias, $priceField)
    {
        return function (QueryBuilder $qb) use ($minAlias, $maxAlias, $priceField) {
            $select = Product::withVatAndDiscount($qb, $priceField);
            $qb->joinVatsOnProducts();

            $qb->andWhere("{$priceField} > 0");

            return sprintf(
                'min(%s) %s, max(%s) %s',
                $select,
                $minAlias,
                $select,
                $maxAlias
            );
        };
    }
}