<?php 

if(!function_exists('revertPromoSetting')){
function revertPromoSetting(array $promoSetting): array
{
    $output = [
        'minimumSpend' => null,
        'minimumQuantity' => null,
        'everyQuantity' => null,
        'itemCategory1' => null,
        'itemCategoryID1' => [],
        'discountAmount' => null,
        'discountType' => null,
        'getNumber' => null,
        'itemCategory2' => null,
        'itemCategoryID2' => [],
        'promoType' => null,
    ];

    // --- MinimumSpend ---
    $min = $promoSetting['MinimumSpend'] ?? [];
    $type = $min['type'] ?? 'none';
    $amountType = $min['amount_type'] ?? '';
    $amount = $min['amount'] ?? 0;

    if ($type !== 'none') {
        $output['itemCategory1'] = $type;
        $output['itemCategoryID1'] = $min['filter'] ?? [];

        if ($amountType === 'amount') {
            $output['minimumSpend'] = $amount;
        } elseif ($amountType === 'quantity') {
            $output['minimumQuantity'] = $amount;
        } elseif ($amountType === 'every_quantity') {
            $output['everyQuantity'] = $amount;
        }
    }

    // --- Promo ---
    $promo = $promoSetting['Promo'] ?? [];
    $promoType = $promo['promo_type'] ?? '';
    $output['promoType'] = $promoType;

    $output['itemCategory2'] = $promo['filter_type'] ?? null;

    if ($promoType === 'free_item') {
        $output['itemCategoryID2'] = $promo['free_item'] ?? [];
        $output['getNumber'] = $promo['amount'] ?? null;

    } else {
        $output['itemCategoryID2'] = $promo['filter'] ?? [];
        $output['discountType'] = $promo['discount_type'] ?? null;

        // Determine amount source
        if ($promo['discount_type'] === 'amount' || $promo['discount_type'] === 'percentage') {
            $output['discountAmount'] = $promo['amount'] ?? null;
        } else {
            $output['getNumber'] = $promo['amount'] ?? null;
        }
    }

    return $output;
}
}

if(!function_exists('calculatePromoPrice')){
    function calculatePromoPrice($price, $amount, $type){
        if ($price < 0 || $amount < 0) {
            return 0;
        }
        if($type == 'amount'){
            return $amount;
        } else if ($type == 'percentage'){
            return $price * $amount / 100;
        } else {
            return 0;
        }
    }
}


?>