import { ViewManager } from "db://assets/Scripts/Main/Manager/ViewManager";

/**
 * 导航管理器
 * 
 * 负责管理游戏中的页面导航和路由，将导航逻辑从业务逻辑中分离出来
 * 
 * @author AI Chat System  
 * @version 1.0.0
 */
export class NavigationManager {
    private static _instance: NavigationManager;

    /**
     * 获取NavigationManager的单例实例
     * 
     * @returns {NavigationManager} 导航管理器实例
     * @static
     */
    public static get Instance(): NavigationManager {
        if (!this._instance) {
            this._instance = new NavigationManager();
        }
        return this._instance;
    }

    private constructor() {}

    /**
     * 进入角色列表页面
     * 
     * @param {number} themeId - 主题ID，用于筛选角色
     * 
     * @example
     * ```typescript
     * NavigationManager.Instance.navigateToGirlList(1);
     * ```
     */
    public navigateToGirlList(themeId: number): void {
        if (themeId == null || themeId < 0) {
            console.warn("Invalid theme ID for girl list navigation:", themeId);
            return;
        }

        console.log(`Navigating to girl list with theme ID: ${themeId}`);
        ViewManager.I.openBundlesView("GirlListPanel", themeId);
    }

    /**
     * 进入聊天页面
     * 
     * @param {number} roleId - 角色ID
     * 
     * @example
     * ```typescript  
     * NavigationManager.Instance.navigateToChat(10001);
     * ```
     */
    public navigateToChat(roleId: number): void {
        if (roleId == null || roleId <= 0) {
            console.warn("Invalid role ID for chat navigation:", roleId);
            return;
        }

        console.log(`Navigating to chat with role ID: ${roleId}`);
        ViewManager.I.openBundlesView("ChatPanel", roleId);
    }

    /**
     * 进入角色详情页面
     * 
     * @param {number} roleId - 角色ID
     * 
     * @example
     * ```typescript
     * NavigationManager.Instance.navigateToGirlDetail(10001);
     * ```
     */
    public navigateToGirlDetail(roleId: number): void {
        if (roleId == null || roleId <= 0) {
            console.warn("Invalid role ID for detail navigation:", roleId);
            return;
        }

        console.log(`Navigating to girl detail with role ID: ${roleId}`);
        ViewManager.I.openBundlesView("GirlDetailPanel", roleId);
    }

    /**
     * 返回主界面
     * 
     * @example
     * ```typescript
     * NavigationManager.Instance.navigateToMainMenu();
     * ```
     */
    public navigateToMainMenu(): void {
        console.log("Navigating to main menu");
        // TODO: 实现返回主界面的逻辑
        // ViewManager.I.openBundlesView("MainMenu");
    }

    /**
     * 检查是否可以导航到指定页面
     * 
     * @param {string} pageName - 页面名称
     * @returns {boolean} 是否可以导航
     */
    public canNavigateTo(pageName: string): boolean {
        const allowedPages = ["GirlListPanel", "ChatPanel", "GirlDetailPanel"];
        return allowedPages.indexOf(pageName)>=0;
    }

    /**
     * 获取当前页面的导航历史（预留功能）
     * 
     * @returns {string[]} 导航历史数组
     */
    public getNavigationHistory(): string[] {
        // TODO: 实现导航历史记录功能
        console.log("Navigation history feature not implemented yet");
        return [];
    }

    /**
     * 返回上一页（预留功能）
     */
    public goBack(): void {
        // TODO: 实现返回上一页功能
        console.log("Go back feature not implemented yet");
    }
}