<?php
/**
 * @Name
 * @Description
 * @Author 刘学玺
 * @Date 2024/8/15 14:30
 */

namespace App\Http\Services\Backend\Server\System;

use App\Enums\System\MenuType;
use App\Exceptions\ApiException;
use App\Http\Services\Service;
use App\Models\System\Menu;
use Symfony\Component\HttpFoundation\Response;

class MenuService extends Service
{

    /**
     * @throws ApiException
     */
    public function createMenu($data)
    {
        // 校验父菜单存在
        self::validateParentMenu($data['parentId'], null);
        // 校验菜单（自己）
        self::validateMenu($data['parentId'], $data['name'], null);
        // 插入数据库
        $menu = self::toModel($data, Menu::class);
        self::initMenuProperty($menu);
        return Menu::create($menu->getAttributes())->id;
    }

    /**
     * @throws ApiException
     */
    public function updateMenu($params)
    {
        // 校验更新的菜单是否存在
        !self::isExistMenu($params['id']) && self::error('MENU_NOT_EXISTS', Response::HTTP_UNPROCESSABLE_ENTITY);
        // 校验父菜单存在
        self::validateParentMenu($params['parentId'], $params['id']);
        // 校验菜单（自己）
        self::validateMenu($params['parentId'], $params['name'], $params['id']);

        // 更新到数据库
        $menu = self::toModel($params, Menu::class);

        self::initMenuProperty($menu);
        $menu->update($menu->getAttributes());
    }

    /**
     * @throws ApiException
     */
    public function deleteMenu($id)
    {
        // 校验是否还有子菜单
        self::validateChildrenMenu($id);

        // 校验删除的菜单是否存在
        !self::isExistMenu($id) && self::error('MENU_NOT_EXISTS',Response::HTTP_UNPROCESSABLE_ENTITY);

        $menu = self::toModel(['id' => $id], Menu::class);

        // 标记删除
        return $menu->delete();
    }

    public function getMenu($id)
    {
        $menu = Menu::query();
        $select = ['id','name','permission','type','sort','parent_id as parentId','path','icon','component','component_name as componentName','status','visible','keep_alive as keepAlive','always_show as alwaysShow'];
        return $menu->select($select)->find($id)->toArray();
    }
    public function getMenuList($params = []): array
    {
        $menu = Menu::query();
        $select = ['id','name','type','sort','parent_id as parentId','path','icon','component','component_name as componentName','status','visible','keep_alive as keepAlive','always_show as alwaysShow'];
        !empty($params['name']) && $menu->whereLike('name', "%{$params['name']}%");
        !is_null($params['status']) && $menu->where('status', $params['status']);
        return $menu->orderBy('sort')->select($select)->get()->toArray();
    }

    public function getSimpleMenuList(): array
    {
        $menus = $this->getMenuList(['status' => 0]);
        $list = self::filterDisableMenus($menus);
//        list.sort(Comparator . comparing(MenuDO::getSort));
        return $list;
    }

    protected static function isExistMenu(int|array $condition): bool
    {
        $menu = Menu::query();
        is_array($condition) && $menu->where($condition);
        is_numeric($condition) && $menu->where('id', $condition);
        return $menu->exists();
    }

    /**
     * @throws ApiException
     */
    protected static function validateChildrenMenu($parentId): void
    {
        Menu::query()->where('parent_id', $parentId)->count() && self::error('MENU_EXISTS_CHILDREN', Response::HTTP_UNPROCESSABLE_ENTITY);
    }

    /**
     * @throws ApiException
     */
    protected static function validateParentMenu($parentId, $childId): void
    {
        if (!$parentId) return;
        // 不能设置自己为父菜单
        $parentId === $childId && self::error('MENU_PARENT_ERROR',Response::HTTP_UNPROCESSABLE_ENTITY);

        $menu = Menu::query()->select('type')->find($parentId);
        // 父菜单不存在
        !$menu && self::error('MENU_PARENT_NOT_EXISTS', Response::HTTP_UNPROCESSABLE_ENTITY);

        // 父菜单必须是目录或者菜单类型
        $menu->type != MenuType::DIR && $menu->type != MenuType::MENU && self::error('MENU_PARENT_NOT_DIR_OR_MENU', Response::HTTP_UNPROCESSABLE_ENTITY);
    }

    /**
     * @throws ApiException
     */
    protected static function validateMenu($parentId, $name, $id): void
    {
        $where = ['parent_id' => $parentId, 'name' => $name];
        $menu = Menu::query()->where($where)->first();
        if (is_null($menu)) return;

        // 如果 id 为空，说明不用比较是否为相同 id 的菜单
        !$id && self::error('MENU_NAME_DUPLICATE', Response::HTTP_UNPROCESSABLE_ENTITY);
        $menu->id !== $id && self::error('MENU_NAME_DUPLICATE', Response::HTTP_UNPROCESSABLE_ENTITY);
    }

    /**
     * 初始化菜单的通用属性。
     * <p>
     * 例如说，只有目录或者菜单类型的菜单，才设置 icon
     *
     */
    private static function initMenuProperty(&$menu): void
    {
        // 菜单为按钮类型时，无需 component、icon、path 属性，进行置空
        if ($menu->type === MenuType::BUTTON) {
            $menu->component = null;
            $menu->componentName = null;
            $menu->icon = null;
            $menu->path = null;
        }
        (isset($menu->permission) && empty($menu->permission) || !isset($menu->permission)) && ($menu->permission = null);
    }

    private static function filterDisableMenus($menus): array
    {
        if (empty($menus)) return [];
//        $menuMap = convertMap($menus,'id');
//        $menuMap = collect($menus)->mapWithKeys(function ($menu) {
//            return [$menu['id'] => $menu];
//        })->all();

        // 遍历 menu 菜单，查找不是禁用的菜单，添加到 enabledMenus 结果
        $enabledMenus = [];
        $disabledMenuCache = []; // 存下递归搜索过被禁用的菜单，防止重复的搜索

        foreach ($menus as $menu) {
            if($menu['status'] !== 0) continue;
//            if($menu['type'] === 3) continue;
//            if (isMenuDisabled($menu, $menuMap, $disabledMenuCache)) {
//                continue;
//            }
            $enabledMenus[] = ['id' => $menu['id'],'status' => $menu['status'], 'name' => $menu['name'], 'parentId' => $menu['parentId'], 'type' => $menu['type']];
        }

        return $enabledMenus;
    }

}