/**
 * 右键菜单管理器
 * 负责管理右键上下文菜单的显示和交互
 */
import { BaseManager } from '../core/base-manager';
import { ManagerRegistry } from '../core/manager-registry';
import { BimRightKey } from '../components/right-key';
import { BimMenu } from '../components/menu';
import { MenuItemConfig } from '../components/menu/item';

/**
 * 右键菜单管理器
 * 支持注册多个上下文处理器，动态生成右键菜单
 */
export class RightKeyManager extends BaseManager {
    /** 容器元素 */
    private container: HTMLElement;
    /** 右键面板实例 */
    private rightKeyPanel: BimRightKey;
    /** 上下文处理器列表 */
    private contextHandlers: Array<(e: MouseEvent) => MenuItemConfig[] | null> = [];

    constructor(container: HTMLElement, registry: ManagerRegistry) {
        super(registry);
        this.container = container;

        this.rightKeyPanel = new BimRightKey({
            zIndex: 9000,
            container: this.container,
            onContext: this.handleContextMenu
        });
        this.rightKeyPanel.init();
    }

    /** 销毁管理器 */
    public destroy(): void {
        this.rightKeyPanel.destroy();
        super.destroy();
    }

    /**
     * 注册上下文处理器
     * @param handler 处理器函数，返回菜单项配置
     */
    public registerHandler(handler: (e: MouseEvent) => MenuItemConfig[] | null): void {
        this.contextHandlers.push(handler);
    }

    /**
     * 显示菜单
     * @param x 横坐标
     * @param y 纵坐标
     * @param items 菜单项配置
     * @param groupOrder 分组顺序
     */
    public showMenu(x: number, y: number, items: MenuItemConfig[], groupOrder?: string[]): void {
        if (!items || items.length === 0) return;

        const menu = new BimMenu({ items, groupOrder });
        menu.init();

        this.rightKeyPanel.mount(menu);
        this.rightKeyPanel.show(x, y);
    }

    /** 隐藏菜单 */
    public hide(): void {
        this.rightKeyPanel.hide();
    }

    /** 处理右键点击事件 */
    private handleContextMenu = (e: MouseEvent): void => {
        let items: MenuItemConfig[] | null = null;
        for (const handler of this.contextHandlers) {
            const result = handler(e);
            if (result && result.length > 0) {
                if (!items) items = [];
                items = items.concat(result);
            }
        }

        if (items && items.length > 0) {
            this.showMenu(e.clientX, e.clientY, items);
        } else {
            this.hide();
        }
    };
}