<?php
namespace AskTamMCP\Tools;
defined('ABSPATH') || exit;

class MenuTools {

    public static function listMenus(array $args): array {
        $menus = wp_get_nav_menus();
        return ['menus' => array_map(fn($m) => ['id' => $m->term_id, 'name' => $m->name, 'slug' => $m->slug, 'count' => $m->count], $menus)];
    }

    public static function getMenu(array $args): array {
        $items = wp_get_nav_menu_items($args['menu']);
        if ($items === false) throw new \RuntimeException("Menu not found: {$args['menu']}");
        $items = $items ?: [];
        return ['items' => array_map(fn($i) => ['id' => $i->ID, 'title' => $i->title, 'url' => $i->url, 'parent' => (int) $i->menu_item_parent, 'order' => (int) $i->menu_order, 'type' => $i->type, 'object' => $i->object, 'object_id' => (int) $i->object_id], $items)];
    }

    public static function getMenuItems(array $args): array {
        return self::getMenu($args);
    }

    public static function createMenuItem(array $args): array {
        if (empty($args['menu'])) throw new \RuntimeException("menu is required.");
        $data = [
            'menu-item-title'  => $args['title'] ?? '',
            'menu-item-url'    => $args['url'] ?? '#',
            'menu-item-status' => 'publish',
            'menu-item-type'   => $args['type'] ?? 'custom',
        ];
        if (!empty($args['parent']))   $data['menu-item-parent-id'] = (int) $args['parent'];
        if (!empty($args['position'])) $data['menu-item-position']  = (int) $args['position'];
        if (!empty($args['object_id'])) {
            $data['menu-item-object-id'] = (int) $args['object_id'];
            $data['menu-item-object']    = $args['object'] ?? 'page';
            $data['menu-item-type']      = $args['type'] ?? 'post_type';
        }
        $id = wp_update_nav_menu_item($args['menu'], 0, $data);
        if (is_wp_error($id)) throw new \RuntimeException($id->get_error_message());
        return ['item_id' => $id, 'id' => $id, 'menu' => $args['menu']];
    }

    public static function updateMenuItem(array $args): array {
        if (empty($args['menu'])) throw new \RuntimeException("menu is required.");
        $data = [];
        if (isset($args['title']))    $data['menu-item-title']    = $args['title'];
        if (isset($args['url']))      $data['menu-item-url']      = $args['url'];
        if (isset($args['parent']))   $data['menu-item-parent-id']= (int) $args['parent'];
        if (isset($args['position'])) $data['menu-item-position'] = (int) $args['position'];
        if (empty($data))             throw new \RuntimeException("No fields to update.");
        $data['menu-item-status'] = 'publish';
        $item_id = (int) ($args['item_id'] ?? 0);
        $id = wp_update_nav_menu_item($args['menu'], $item_id, $data);
        if (is_wp_error($id)) throw new \RuntimeException($id->get_error_message());
        return ['item_id' => $id, 'id' => $id, 'menu' => (int) $args['menu'], 'updated' => true];
    }

    public static function deleteMenuItem(array $args): array {
        $item_id = (int) ($args['item_id'] ?? 0);
        if (!$item_id) throw new \RuntimeException("item_id is required.");
        $result = wp_delete_post($item_id, true);
        if (!$result) throw new \RuntimeException("Failed to delete menu item: {$item_id}");
        return ['item_id' => $item_id, 'deleted' => true];
    }

    public static function reorderMenuItems(array $args): array {
        $ids = $args['menu_item_ids'] ?? [];
        if (empty($ids)) throw new \RuntimeException("menu_item_ids is required.");
        foreach ($ids as $pos => $id) {
            wp_update_post(['ID' => (int) $id, 'menu_order' => $pos + 1]);
        }
        return ['reordered' => true, 'count' => count($ids)];
    }
}