<?php

namespace rnadvanceemailingwc\Managers\ConditionManager\Comparators;

use Automattic\WooCommerce\Admin\Overrides\Order;
use rnadvanceemailingwc\DTO\ConditionLineOptionsDTO;
use rnadvanceemailingwc\Fields\Core\OrderRetriever;
use rnadvanceemailingwc\Managers\ConditionManager\Comparators\Core\ComparatorBase;
use rnadvanceemailingwc\Utilities\Sanitizer;

class StandardComparator extends ComparatorBase
{

    /**
     * @param $retriever OrderRetriever
     * @param $conditionLine ConditionLineOptionsDTO
     * @return bool
     */
    public function Compare($retriever, $conditionLine)
    {
        $field=$retriever->GetFieldById($conditionLine->FieldId);
        if($field==null)
            return true;

        $text=$field->ToText();
        $value=Sanitizer::SanitizeString($conditionLine->Value,'');
        $result = $this->CompareText($text, $value, $conditionLine->Comparison);

        // For ProductName fields, also check against the parent product name if this is a variation
        if($conditionLine->FieldId == 'ProductName')
        {
            $parentName = $this->GetParentProductName($retriever);
            if($parentName !== null)
            {
                $parentResult = $this->CompareText($parentName, $value, $conditionLine->Comparison);

                // For positive comparisons: pass if either variation or parent matches
                if(!$result && in_array($conditionLine->Comparison, ['Equal', 'Contains']))
                    return $parentResult;

                // For negative comparisons: fail if parent matches the value
                if($result && in_array($conditionLine->Comparison, ['NotEqual', 'NotContains']))
                    return $parentResult;
            }
        }

        return $result;
    }

    /**
     * Gets the parent product name if the current order line item is a variation.
     * @param $retriever OrderRetriever
     * @return string|null
     */
    private function GetParentProductName($retriever)
    {
        $lineItem = $retriever->GetCurrentOrderLine();
        if($lineItem == null)
            return null;

        $product = $lineItem->GetProduct();
        if($product == null)
            return null;

        if($product->is_type('variation'))
        {
            $parentId = $product->get_parent_id();
            if($parentId > 0)
            {
                $parentProduct = wc_get_product($parentId);
                if($parentProduct != null)
                    return $parentProduct->get_name();
            }
        }

        return null;
    }

    private function CompareText($text, $value, $comparison)
    {
        switch ($comparison)
        {
            case 'Equal':
                return $text==$value;
            case "NotEqual":
                return $text!=$value;
            case "IsEmpty":
                return $text=='';
            case "IsNotEmpty":
                return $text!='';
            case "Contains":
                return strpos($text,$value)!==false;
            case "NotContains":
                return strpos($text,$value)===false;
        }
        return true;
    }
}