<?php
namespace Zadex\Dynamic\Tags;

defined('ABSPATH') || exit;

use Zadex\Dynamic\Context;

/** Advanced Custom Fields: `get_field($key, $post_id)`. Image fields return `{url,id,alt}`. */
final class AcfField extends PluginField
{
    public static function required_function(): string
    {
        return 'get_field';
    }

    public function name(): string
    {
        return 'acf';
    }

    public function title(): string
    {
        return __('ACF field', 'zadex');
    }

    protected function field(string $key, Context $ctx)
    {
        return get_field($key, $ctx->post_id > 0 ? $ctx->post_id : false);
    }

    public function options(string $control, string $search, Context $ctx): array
    {
        if ($control !== 'key' || !function_exists('acf_get_field_groups') || !function_exists('acf_get_fields')) {
            return [];
        }
        $out = [];
        foreach ((array) acf_get_field_groups() as $group) {
            foreach ((array) acf_get_fields($group) as $field) {
                if (is_array($field) && isset($field['name']) && is_string($field['name']) && $field['name'] !== '') {
                    $label = is_string($field['label'] ?? null) && $field['label'] !== '' ? $field['label'] : $field['name'];
                    $out[] = ['value' => $field['name'], 'label' => $label];
                }
            }
        }
        return self::filter_options($out, $search);
    }
}