import { _decorator, BoxCollider2D, Button, Camera, CircleCollider2D, Color, Component, debug, DebugView, director, EventTouch, find, geometry, Input, input, Node, NodeEventType, PhysicsSystem, RenderTexture, Tween, tween, v3, Vec3, view } from 'cc';
import { EventDispatcher } from '../../core_tgx/easy_ui_framework/EventDispatcher';
import { GameEvent } from './Enum/GameEvent';
import { LineDrawer } from './LineDrawer';
import { EnemyComponent } from './Components/EnemyComponent';

const { ccclass, property } = _decorator;

enum ERaycastType {
    ALL,
    CLOSEST
}
@ccclass('LevelAction')
export class LevelAction extends Component {

    @property(Camera)
    public camera: Camera = null!;

    private _renderTex: RenderTexture | null = null;
    private _cameraOriginalPos: Vec3 = v3();
    private _touchStartPos: Vec3 = v3();
    private _isDragging = false;
    public targetNode: Node = null!;

    // 添加旋转限制属性
    @property({type: Number})
    public minXRotation: number = -30;  // X轴最小旋转角度(上下)
    @property({type: Number}) 
    public maxXRotation: number = 30;   // X轴最大旋转角度(上下)
    @property({type: Number})
    public minYRotation: number = -70;  // Y轴最小旋转角度(左右)
    @property({type: Number})
    public maxYRotation: number = 70;   // Y轴最大旋转角度(左右)
    private _originalRotation: Vec3 = v3();

    //镜头拉近属性
    private _zoomDuration: number = 0.5; // 拉近持续时间(秒)

    private _raycastType: ERaycastType = ERaycastType.ALL;

    onLoad(): void {
        this._cameraOriginalPos = this.camera.node.position.clone();
        this._originalRotation = this.camera.node.eulerAngles.clone();
        this.registerEvent();
    }

    start() {

    }

    private registerEvent(){
        // 触摸事件监听
        input.on(Input.EventType.TOUCH_START, this._onTouchStart, this);
        input.on(Input.EventType.TOUCH_MOVE, this._onTouchMove, this);
        input.on(Input.EventType.TOUCH_END, this._onTouchEnd, this);
        input.on(Input.EventType.TOUCH_CANCEL, this._onTouchEnd, this);

        //事件监听
        EventDispatcher.instance.on(GameEvent.EVENT_CAMERA_AIM,this.onAimTarget,this);
        EventDispatcher.instance.on(GameEvent.EVENT_CAMERA_RESET_AIM,this.onResetAimTarget,this);
        EventDispatcher.instance.on(GameEvent.EVENT_CAMERA_SHOOT,this.onShoot,this);
    }

    private unRegisterEvent(){
        // 触摸事件监听
        input.off(Input.EventType.TOUCH_START, this._onTouchStart, this);
        input.off(Input.EventType.TOUCH_MOVE, this._onTouchMove, this); 
        input.off(Input.EventType.TOUCH_END, this._onTouchEnd, this);
        input.off(Input.EventType.TOUCH_CANCEL, this._onTouchEnd, this);

        //事件监听
        EventDispatcher.instance.off(GameEvent.EVENT_CAMERA_AIM,this.onAimTarget,this);
        EventDispatcher.instance.off(GameEvent.EVENT_CAMERA_RESET_AIM,this.onResetAimTarget,this);
        EventDispatcher.instance.off(GameEvent.EVENT_CAMERA_SHOOT,this.onShoot,this);
    }

    private onAimTarget(){
        this.moveCameraAlongForward(-30); // 负值表示拉近
    }

    private onResetAimTarget(){
        this.moveCameraAlongForward(30); // 正值表示拉远
    }

    private onShoot(){
       // 获取正确的屏幕中心坐标
       const screenCenter = view.getVisibleSize();
       const screenX = screenCenter.width * 0.5 * view.getScaleX();
       const screenY = screenCenter.height * 0.5 * view.getScaleY();

       // 从屏幕中心发射射线
       const ray = new geometry.Ray();
       this.camera.screenPointToRay(screenX, screenY, ray);
        
        // 射线检测参数
        const mask = 0xffffffff;
        const maxDistance = 1000;
        const queryTrigger = true;
        
        // 执行射线检测
        const hasHit = PhysicsSystem.instance.raycast(ray, mask, maxDistance, queryTrigger);
        
        if (hasHit) {
            const results = PhysicsSystem.instance.raycastResults;
            for (let i = 0; i < results.length; i++) {
                const item = results[i];
                const hitNode = item.collider.node;
                console.log(`碰撞物体${i}: ${hitNode.name} 距离: ${item.distance.toFixed(2)}`);

                if(hitNode.getComponent(EnemyComponent)){
                    EventDispatcher.instance.emit(GameEvent.EVENT_CAMERA_SHOOT_TEXT);
                    EventDispatcher.instance.emit(GameEvent.EVENT_CAMERA_SHOOT_ENEMY,hitNode);
                }
            }
        }
    }
    
    private moveCameraAlongForward(distance: number) {
        const currentPos = this.camera.node.position.clone();
        const forward = this.camera.node.forward.negative();
        const targetPos = currentPos.add(forward.multiplyScalar(distance));
        
        tween(this.camera.node.position)
            .to(this._zoomDuration, targetPos, {
                easing: 'smooth',
                onUpdate: (target: Vec3) => {
                    this.camera.node.position = target;
                    // 根据距离动态调整旋转限制范围
                    const zoomFactor = Math.abs(distance) / 30;
                    this.minYRotation = -70 * zoomFactor;
                    this.maxYRotation = 70 * zoomFactor;
                }
            })
            .start();
    }

    /***************************触摸事件**********************************/
    private _onTouchStart(event: EventTouch) {
        const touchPos = event.getLocation();
        this._touchStartPos = v3(touchPos.x, touchPos.y, 0);
        this._isDragging = true;
        // 记录初始旋转角度
        this._originalRotation = this.camera.node.eulerAngles.clone();
    }
    
    private _onTouchMove(event: EventTouch) {
        if (!this._isDragging) return;
        
        const currentPos = event.getLocation();
        const deltaX = currentPos.x - this._touchStartPos.x;
        const deltaY = currentPos.y - this._touchStartPos.y;
        
        // 根据当前相机距离调整旋转灵敏度
        const distanceFactor = Math.max(0.5, this.camera.node.position.length() / 30);
        const sensitivity = 0.1 * distanceFactor;
        
        const rotationDelta = v3(
            deltaY * sensitivity,
            -deltaX * sensitivity,
            0
        );
        
        // 计算新旋转角度
        const newRotation = this._originalRotation.clone().add(rotationDelta);
        
        // 添加旋转限制
        newRotation.x = Math.max(this.minXRotation, Math.min(this.maxXRotation, newRotation.x));
        newRotation.y = Math.max(this.minYRotation, Math.min(this.maxYRotation, newRotation.y));
        
        this.camera.node.setRotationFromEuler(newRotation);
    }
    
    private _onTouchEnd() {
        this._isDragging = false;
        // 不再需要重置_cameraOriginalPos，保持当前相机位置
    }

 /***************************触摸事件end**********************************/

    onDestroy () {
        Tween.stopAllByTarget(this.node);
        this.unRegisterEvent();
        if (this._renderTex) {
            this._renderTex.destroy();
            this._renderTex = null;
        }
    }
}