<?php

declare(strict_types=1);

namespace CrocoAI\DataBridge;

/**
 * Read renamed identifiers with a fallback to the pre-1.0.2 `wpi_` names.
 *
 * Option and post-meta keys are copied by IdentifierMigration. Canonical JSON
 * stored in plugin tables is not rewritten, so in-flight releases still carry
 * `_wpi_client_key` and related payload keys.
 */
final class LegacyKeys
{
    public static function canonical(array $canonical, string $name, mixed $default = ''): mixed
    {
        if (array_key_exists('_crocoai_dbridge_' . $name, $canonical)) {
            return $canonical['_crocoai_dbridge_' . $name];
        }
        if (array_key_exists('_wpi_' . $name, $canonical)) {
            return $canonical['_wpi_' . $name];
        }
        return $default;
    }

    public static function hasCanonical(array $canonical, string $name): bool
    {
        return array_key_exists('_crocoai_dbridge_' . $name, $canonical)
            || array_key_exists('_wpi_' . $name, $canonical);
    }

    public static function forgetCanonical(array &$canonical, string $name): void
    {
        unset($canonical['_crocoai_dbridge_' . $name], $canonical['_wpi_' . $name]);
    }

    public static function postMeta(int $postId, string $name): string
    {
        $value = (string) get_post_meta($postId, '_crocoai_dbridge_' . $name, true);
        return $value !== '' ? $value : (string) get_post_meta($postId, '_wpi_' . $name, true);
    }

    public static function productMeta(\WC_Product $product, string $name): mixed
    {
        $value = $product->get_meta('_crocoai_dbridge_' . $name, true, 'edit');
        if (is_array($value)) {
            return $value !== [] ? $value : $product->get_meta('_wpi_' . $name, true, 'edit');
        }
        if ($value !== '' && $value !== false && $value !== null) {
            return $value;
        }
        return $product->get_meta('_wpi_' . $name, true, 'edit');
    }
}