import * as THREE from "../../../libs/three.js/build/three.module.js";
 
import {transitions, easing, lerp} from '../utils/transitions.js'
import math from '../utils/math.js'


let texLoader = new THREE.TextureLoader()
let defaultOpacity =  0.7
let Buttons = Potree.defines.Buttons


//鼠标指示小圆片 
export default class Reticule extends THREE.Mesh{
    constructor(viewer){
        var defaultTex = texLoader.load(Potree.resourcePath+'/textures/whiteCircle.png'/* reticule-256x256.png'  */)  
        super(new THREE.PlaneBufferGeometry(0.11,0.11,1,1),new THREE.MeshBasicMaterial({
            side: THREE.DoubleSide , 
            map: defaultTex,
            transparent:true,
            depthTest: !1,
            opacity: defaultOpacity,
            //depthWrite: !1,
        })) 
        this.name = 'reticule'
        this.defaultTex = defaultTex
        this.crosshairTex = texLoader.load(Potree.resourcePath+'/textures/reticule_cross_hair.png') 
        this.forbitTex = texLoader.load(Potree.resourcePath+'/textures/pic-forbid.png') 
        
        this.defaultTex.anisotropy = 4 
        this.crosshairTex.anisotropy = 4 
        this.forbitTex.anisotropy = 4 
        //this.layers.set(0/* RenderLayers.RETICULE */);
        this.renderOrder = 100
        this.layers.set(Potree.config.renderLayers.marker);
        
        
        this.direction = new THREE.Vector3;
       
        this.mouseLastMoveTime = Date.now();
        this.hoverViewport;
        this.matrixMap = new Map 
        this.matrixAutoUpdate = false 
        

        this.hide(0)

        //viewer.inputHandler.addInputListener(this);
        Potree.settings.intersectWhenHover && viewer.addEventListener('global_mousemove',this.move.bind(this))
        //viewer.addEventListener('global_click',this.move.bind(this))
        viewer.addEventListener('global_mousedown',this.move.bind(this))//主要针对触屏
        
        
        
        
        this.state = {}
        
        let startCrossStyle = ()=>{
            this.state.cross = true
            this.judgeTex()
        }
        let endCrossStyle = ()=>{
            this.state.cross = false
            this.judgeTex()
        }
        
        viewer.addEventListener('measureMovePoint',startCrossStyle) 
        viewer.addEventListener('endMeasureMove',endCrossStyle)
        viewer.addEventListener('start_inserting_tag',startCrossStyle) 
        viewer.addEventListener('endTagMove',endCrossStyle)
        
        viewer.addEventListener('reticule_forbit',(e)=>{
            /* if(this.state.forbit != e.v){
                console.log('change forbit ',e.v)
            } */
            this.state.forbit = e.v
            this.judgeTex() 
        })
        
         
        
        Potree.Utils.setObjectLayers(this,  'sceneObjects' )
    }

    judgeTex(){ 
        if(this.state.forbit){
            this.material.map = this.forbitTex 
        }else if(this.state.cross){
            this.material.map = this.crosshairTex 
        }else{
            this.material.map = this.defaultTex 
        }
        
         
        viewer.mapViewer && viewer.mapViewer.dispatchEvent({type:'content_changed'})
    }




    move(e){ 
        if(e.type == "global_mousemove" && (e.isTouch || e.buttons != Buttons.NONE) && this.state != 'crosshair'){
            return//按下时不更新，除非拖拽测量
        }
           
        this.mouseLastMoveTime = Date.now()
        
        this.updatePosition(e.intersect, e.hoverViewport)
         
    }

    hide(duration = 500){ 
        if(this.hidden)return
        
 
        
        this.hidden = !0 
        transitions.start(lerp.property(this.material , "opacity", 0, ()=>{//progress
            viewer.dispatchEvent('content_changed')
        }), duration,()=>{//done
            this.dispatchEvent({type:'update', visible:false})
        })  
         
        this.dispatchEvent({type:'update', visible:false})
        
        setTimeout(()=>{
            
        },duration)
        
    }

    show(duration = 300){
         
        if(!Potree.Utils.getObjVisiByReason(this, 'force'))return
        //console.log("show Reticule")
        this.hidden = !1
        
        if(this.material.opacity <= 0){
            transitions.start(lerp.property(this.material, "opacity", defaultOpacity, ()=>{//progress
                viewer.dispatchEvent('content_changed')
            }), duration,()=>{//done
                this.dispatchEvent({type:'update', visible:false})
            }) 
        
            this.dispatchEvent({type:'update', visible:true})
            
            
                
        }
        
        
        
    }

    //鼠标静止一段时间它就会消失
    updateVisible(){
        Date.now() - this.mouseLastMoveTime > 1500 && !this.hidden && this.hide()
    }
    
    
    updateScale(viewport){
        let s, camera = viewport.camera
        if(camera.type == "OrthographicCamera"){
            
            var sizeInfo = this.state.cross ? {width2d:500} : {minSize : 100,  maxSize : 400,   nearBound : 100 , farBound :  700}
            s = math.getScaleForConstantSize($.extend(   sizeInfo ,  
            {position:this.position, camera, resolution:viewport.resolution/* 2 */} ))
            
        }else{
            
            let n = camera.position.distanceTo(this.position)
            s = 1 + .1 * n;
            n < 1 && (s -= 1 - n)
        }
        this.scale.set(s, s, s);
        
    }

    updateAtViewports(viewport){//当多个viewports时更新。更新大小等
    
        if(viewport.name == 'magnifier' )return
    
        if(this.orthoPos && this.hoverViewport && this.hoverViewport.name == 'mapViewport' && viewport != this.hoverViewport){
            //若是在地图上更新，在其他viewport要隐藏。因为在地图上无法得知高度。     
            Potree.Utils.updateVisible(this, 'hoverMap', false) 
            return; 
        } 
        Potree.Utils.updateVisible(this, 'hoverMap', true)
        
        if(viewport.name == 'mapViewport'){
            Potree.Utils.setObjectLayers(this,  "bothMapAndScene")
        }else{//通常地图不显示reticule，只有在特殊编辑时才显示
            Potree.Utils.setObjectLayers(this,  'sceneObjects') 
        }
        
        
        var matrix = this.matrixMap.get(viewport)
        if(!matrix){ 
            this.updateScale(viewport)
            this.updateMatrix(); 
            //this.updateMatrixWorld()
            this.matrixMap.set(viewport, this.matrix.clone())
        }else{
            this.matrix.copy(matrix) 
            //this.updateMatrixWorld()
        }
        
    }
   
    
    

    

    updatePosition(intersect, viewport ){ //在地图(当地图融合到viewer时)和场景里都显示且完全相同（大小可能不同）
         
        if (Potree.Utils.getObjVisiByReason(this, 'force')) {//没有被强制隐藏，如进入某个页面后强制不显示
            if (!intersect /* || !intersect.point.normal */){ 
                 return //this.hide();   
            }
                
 
            let location = intersect.location //|| intersect.orthoIntersect.clone()
            let normal  
 
            
            if(!location)return
            this.show( 300); 
         
            normal = intersect.normal 
            if(normal){
                let ratio = /* Potree.settings.useDepthTex ? 1 : */ 0.2;   
                this.direction = this.direction.multiplyScalar(1-ratio); 
                this.direction.add(normal.clone().multiplyScalar(ratio)); 
            }
         
             
            
            
            this.position.copy(location)/* .add(normal.clone().multiplyScalar(.01));  */
            this.updateMatrix();  //lookAt之前要保证得到matrix
            this.lookAt(this.position.clone().add(this.direction));
            
            
            this.hoverViewport = viewport //记录下最近一次hover过的viewport  
            this.updateScale(viewport)
            
            
            {//存储matrix，节省计算
                this.updateMatrix(); 
                //this.updateMatrixWorld()
                this.matrixMap.clear();//重新计算
                this.matrixMap.set(viewport, this.matrix.clone())
                //别处会updateMatrixWorld
            }
            
            this.dispatchEvent({type:'update'})
            
            //为什么navvis在校准数据集时每个viewport里reticule的朝向都刚好垂直于屏幕，似乎限定在了一定范围内，还是在pick时就只pick范围内的点？
            
            
        }
    }
    
    //navvis在地图等地方看reticule是有厚度的
    
    /* updateMatrixWorld(force){
        console.log('updateMatrixWorld', force)
        super.updateMatrixWorld(force) 
    } */
}