/**
 * 3D 引擎管理器
 * 负责管理 3D 渲染引擎的初始化、模型加载和测量功能
 */
import { Engine, type EngineOptions, type ModelLoadOptions } from '../components/engine';
import { BaseManager } from '../core/base-manager';
import { RightKeyManager } from './right-key-manager';
import { infoMenuButton } from '../components/menu/buttons/info';
import { homeMenuButton } from '../components/menu/buttons/home';
import type { MeasureMode } from '../types/measure';
import type { SectionBoxRange } from '../components/section-box-panel/types';

/**
 * 3D 引擎管理器
 * 封装底层 3D 引擎，提供模型加载、相机控制、测量等功能
 */
export class EngineManager extends BaseManager {
    /** 容器元素 */
    private container: HTMLElement;
    /** 引擎实例 */
    private engineInstance: Engine | null = null;
    /** 右键菜单管理器 */
    public rightKey: RightKeyManager | null = null;

    constructor(container: HTMLElement) {
        super();
        this.container = container;
    }

    /**
     * 初始化 3D 引擎
     * @param options 引擎配置选项
     * @returns 是否初始化成功
     */
    public initialize(options?: Omit<EngineOptions, 'container'>): boolean {
        if (this.engineInstance && this.engineInstance.isInitialized()) {
            console.warn('[EngineManager] 3D Engine already initialized. Destroying old instance...');
            this.engineInstance.destroy();
            this.engineInstance = null;
        }

        try {
            this.engineInstance = new Engine({
                container: this.container,
                ...options,
            });

            this.engineInstance.init();

            this.rightKey = new RightKeyManager(this.container);

            this.rightKey.registerHandler((_e) => {
                return [
                    infoMenuButton(),
                    homeMenuButton()
                ];
            });

            return this.engineInstance.isInitialized();
        } catch (error) {
            console.error('[EngineManager] Failed to initialize 3D engine:', error);
            this.engineInstance = null;
            return false;
        }
    }

    /**
     * 检查引擎是否已初始化
     * @returns 是否已初始化
     */
    public isInitialized(): boolean {
        return this.engineInstance !== null && this.engineInstance.isInitialized();
    }

    /**
     * 加载模型
     * @param url 模型 URL
     * @param options 加载选项
     */
    public loadModel(url: string, options?: ModelLoadOptions): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.loadModel(url, options);
    }

    /**
     * 获取底层引擎实例
     * @returns 引擎实例
     */
    public getEngine(): any {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return null;
        }
        return this.engineInstance.getEngine();
    }

    /** 相机回到初始位置 */
    public CameraGoHome(): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.CameraGoHome();
    }

    /** 暂停渲染 */
    public pauseRendering(): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.pauseRendering();
    }

    /** 恢复渲染 */
    public resumeRendering(): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.resumeRendering();
    }

    /**
     * 激活测量模式
     * @param mode 测量模式
     */
    public activateMeasure(mode: MeasureMode): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.activateMeasure(mode);
    }

    /** 停用测量模式 */
    public deactivateMeasure(): void {
        if (!this.engineInstance) {
            return;
        }
        this.engineInstance.deactivateMeasure();
    }

    /**
     * 获取当前测量类型
     * @returns 当前测量模式
     */
    public getCurrentMeasureType(): MeasureMode | null {
        if (!this.engineInstance) {
            return null;
        }
        return this.engineInstance.getCurrentMeasureType();
    }

    /** 清除所有测量标注 */
    public clearAllMeasures(): void {
        if (!this.engineInstance) {
            return;
        }
        this.engineInstance.clearAllMeasures();
    }

    /**
     * 激活轴向剖切
     * @param axis 要激活的轴向 ('x' | 'y' | 'z')
     */
    public activateSectionAxis(axis: 'x' | 'y' | 'z'): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.activateSectionAxis(axis);
    }

    /**
     * 停用轴向剖切
     */
    public deactivateSectionAxis(): void {
        if (!this.engineInstance) {
            return;
        }
        this.engineInstance.deactivateSectionAxis();
    }

    /**
     * 获取当前剖切轴向
     * @returns 当前激活的轴向
     */
    public getCurrentSectionAxis(): 'x' | 'y' | 'z' | null {
        if (!this.engineInstance) {
            return null;
        }
        return this.engineInstance.getCurrentSectionAxis();
    }

    /** 激活剖切盒 */
    public activateSectionBox(): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.activateSectionBox();
    }

    /** 停用剖切盒 */
    public deactivateSectionBox(): void {
        if (!this.engineInstance) {
            return;
        }
        this.engineInstance.deactivateSectionBox();
    }

    /** 设置剖切盒范围（百分比 0-100） */
    public setSectionBoxRange(range: SectionBoxRange): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.setSectionBoxRange(range);
    }

    /** 适应剖切盒到模型 */
    public fitSectionBoxToModel(): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.fitSectionBoxToModel();
    }

    /** 重置剖切盒 */
    public resetSectionBox(): void {
        if (!this.engineInstance) {
            return;
        }
        this.engineInstance.resetSectionBox();
    }

    /** 激活框选放大功能 */
    public activateZoomBox(): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.activateZoomBox();
    }

    // ==================== 漫游功能 ====================

    /** 激活第一人称漫游模式 */
    public activateFirstPersonMode(): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.activateFirstPersonMode();
    }

    /** 停用第一人称漫游模式 */
    public deactivateFirstPersonMode(): void {
        if (!this.engineInstance) {
            return;
        }
        this.engineInstance.deactivateFirstPersonMode();
    }

    /**
     * 设置漫游移动速度
     * @param speed 移动速度
     */
    public setWalkSpeed(speed: number): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.setWalkSpeed(speed);
    }

    /**
     * 设置漫游重力开关
     * @param enabled 是否启用重力
     */
    public setWalkGravity(enabled: boolean): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.setWalkGravity(enabled);
    }

    /**
     * 设置漫游碰撞检测开关
     * @param enabled 是否启用碰撞检测
     */
    public setWalkCollision(enabled: boolean): void {
        if (!this.engineInstance) {
            console.warn('[EngineManager] 3D Engine not initialized.');
            return;
        }
        this.engineInstance.setWalkCollision(enabled);
    }

    /**
     * 获取漫游模式是否激活
     * @returns 是否处于漫游模式
     */
    public isFirstPersonModeActive(): boolean {
        if (!this.engineInstance) {
            return false;
        }
        return this.engineInstance.isFirstPersonModeActive();
    }

    // ==================== 结束：漫游功能 ====================

    /** 销毁引擎管理器 */
    public destroy(): void {
        if (this.engineInstance) {
            this.engineInstance.destroy();
            this.engineInstance = null;
        }
        if (this.rightKey) {
            this.rightKey.destroy();
            this.rightKey = null;
        }
        super.destroy();
    }
}