<?php

namespace Ad_Block_Guard;

if (!defined('ABSPATH')) {
    exit; // Exit if accessed directly
}

use Carbon_Fields\Field\Field;
use Carbon_Fields\Datastore\Datastore;

/**
 * Stores serialized values in the database with caching
 */
class Serialized_Theme_Options_Datastore extends Datastore {

    protected $cache_group = 'ad_block_guard_options';

    public function init() {
        // Initialization tasks (if any)
    }

    protected function get_key_for_field(Field $field) {
        return '_' . $field->get_base_name();
    }

    /**
     * Load the field value(s) with caching
     *
     * @param Field $field The field to load value(s) in.
     * @return array
     */
    public function load(Field $field) {
        $cache_key = $this->get_key_for_field($field);
        $cached_value = wp_cache_get($cache_key, $this->cache_group);

        if ($cached_value !== false) {
            return $cached_value;
        }

        $key = $this->get_key_for_field($field);
        $value = get_option($key, null);

        // Cache the retrieved value
        wp_cache_set($cache_key, $value, $this->cache_group);

        return $value;
    }

    /**
     * Save the field value(s) and update cache
     *
     * @param Field $field The field to save.
     */
    public function save(Field $field) {
        if (!empty($field->get_hierarchy())) {
            return; // only applicable to root fields
        }

        $key = $this->get_key_for_field($field);
        $value = $field->get_full_value();

        if (is_a($field, '\\Carbon_Fields\\Field\\Complex_Field')) {
            $value = $field->get_value_tree();
        }

        $this->save_key_value_pair_with_autoload($key, $value, $field->get_autoload());

        // Update cache
        wp_cache_set($key, $value, $this->cache_group);
    }

    /**
     * Delete the field value(s) and remove from cache
     *
     * @param Field $field The field to delete.
     */
    public function delete(Field $field) {
        if (!empty($field->get_hierarchy())) {
            return; // only applicable to root fields
        }

        $key = $this->get_key_for_field($field);
        delete_option($key);

        // Remove from cache
        wp_cache_delete($key, $this->cache_group);
    }

    /**
     * Save a single key-value pair to the database with autoload
     *
     * @param string $key
     * @param string $value
     * @param bool $autoload
     */
    protected function save_key_value_pair_with_autoload($key, $value, $autoload) {
        $notoptions = wp_cache_get('notoptions', 'options');
        $notoptions[$key] = '';
        wp_cache_set('notoptions', $notoptions, 'options');
        $autoload = $autoload ? 'yes' : 'no';

        if (!add_option($key, $value, "", $autoload)) {
            update_option($key, $value, $autoload);
        }
    }
}