<?php

namespace classes;

use InvalidArgumentException;

class order_item_reason_policy
{
    public const EXTRAORDINARY_CHEMISTRY_PRODUCT_ID = 27;
    public const AFFECTED_PRODUCT_IDS = [21, 22, 25, 26, 27];

    public static function reasons(): array
    {
        return [
            'customer_approved_extra_work' => [
                'label' => 'Kunde godkendte ekstra arbejde',
                'requires_comment' => true,
                'active' => true,
            ],
            'vehicle_condition_extra_work' => [
                'label' => 'Køretøjets tilstand krævede ekstra tid',
                'requires_comment' => true,
                'active' => true,
            ],
            'quality_rework' => [
                'label' => 'Kvalitetsopfølgning eller omvask',
                'requires_comment' => true,
                'active' => true,
            ],
            'legacy_note_only' => [
                'label' => 'Legacy note only',
                'requires_comment' => true,
                'active' => false,
            ],
        ];
    }

    public static function productRequiresReason(int $productId): bool
    {
        return in_array($productId, self::AFFECTED_PRODUCT_IDS, true);
    }

    public static function validateForProduct(int $productId, array $data): array
    {
        if (!self::productRequiresReason($productId)) {
            return ['reason_code' => null, 'reason_label_snapshot' => null, 'reason_comment' => null];
        }

        $code = trim((string)($data['reason_code'] ?? $data['order_item_reason_code'] ?? ''));
        if ($code === '') {
            throw new InvalidArgumentException('Reason code is required for this product');
        }

        $reasons = self::reasons();
        if (!array_key_exists($code, $reasons)) {
            throw new InvalidArgumentException('Reason code is invalid for this product');
        }

        $reason = $reasons[$code];
        if (!$reason['active']) {
            throw new InvalidArgumentException('Reason code is deprecated for this product');
        }

        $comment = trim((string)($data['reason_comment'] ?? $data['comment'] ?? $data['notes'] ?? ''));
        if ($reason['requires_comment'] && $comment === '') {
            throw new InvalidArgumentException('Reason comment is required for this product');
        }

        $snapshot = $reason['label'];

        return ['reason_code' => $code, 'reason_label_snapshot' => $snapshot, 'reason_comment' => $comment];
    }
}