var MathLight = {};
MathLight.RADIANS_PER_DEGREE = Math.PI / 180;
MathLight.DEGREES_PER_RADIAN = 180 / Math.PI;

var filterAll = function filterAll(e, t) {
    return e.filter(function(e) {
        return t.every(function(t) {
            return t(e);
        });
    });
}
var sortByScore = function(list, request, rank) {
    var i = filterAll(list, request);
    return 0 === i.length ? null : i = i.map(function(e) {
        return {
            item: e,
            score: rank.reduce(function(t, i) {
                return t + i(e);
            }, 0)
        };
    }).sort(function(e, t) {
        return t.score - e.score;
    });
};
/* var cameraLight = {
    clampVFOV: function(fov, t, i, n) {
        var r = cameraLight.getHFOVFromVFOV(fov, i, n);
        return r > t ? cameraLight.getVFOVFromHFOV(t, i, n) : fov
    },
    getHFOVForCamera: function(e, t, i) {
        return cameraLight.getHFOVFromVFOV(e.fov, t, i)
    },
    getHFOVFromVFOV: function(fov, t, i) {
        var n = t
            , o = i
            , a = 2 * Math.atan(Math.tan(fov * MathLight.RADIANS_PER_DEGREE / 2) * (n / o)) * MathLight.DEGREES_PER_RADIAN;
        return a
    },
    getVFOVFromHFOV: function(e, t, i) {
        var n = t
            , o = i
            , a = 2 * Math.atan(Math.tan(e * MathLight.RADIANS_PER_DEGREE / 2) * (o / n)) * MathLight.DEGREES_PER_RADIAN;
        return a
    }
};
  */

var initOverlay = function(THREE) {
    var _planeGeometry = new THREE.PlaneGeometry(settings.overlay.width,settings.overlay.height,1,1)
    var _boxGeometry = new THREE.BoxBufferGeometry(settings.overlay.width,settings.overlay.height,settings.overlay.depth)
    //ie的mesh 加了polygonOffset也是会重叠。所以去掉前面的face：  （但是突然ie又播放不了videoTexture）
    var newIndex = [..._boxGeometry.index.array]
    newIndex.splice(4 * 6, 6)
    _boxGeometry.setIndex(new THREE.BufferAttribute(new Uint16Array(newIndex),1))

    var _boxMat = new THREE.MeshBasicMaterial({
        //MeshStandardMaterial
        color: "#eeeeee",
        transparent: !0,
        opacity: 0.8
    })

    var overlayGroup = new THREE.Object3D;
    player.model.add(overlayGroup);
    overlayGroup.name = "overlayGroup"
    player.overlayGroup = overlayGroup;

    var Overlay = function(info) {
        THREE.Object3D.call(this);
        this.sid = info.sid;
        if (info.media)
            this.preDeal(info)
        this.build(info);
        this.name = "overlay_" + this.sid;
    }
    Overlay.prototype = Object.create(THREE.Object3D.prototype);

    Overlay.prototype.build = function(info) {

        var plane = new THREE.Mesh(_planeGeometry,new THREE.MeshBasicMaterial({
            //MeshStandardMaterial
            color: "#00c8af",
            opacity: 0.4,
            transparent: !0,
            polygonOffset: true,
            //是否开启多边形偏移		//ie不开启时blank也不会闪烁
            polygonOffsetFactor: -0.9,
            //多边形偏移因子
            polygonOffsetUnits: -4.0,
            //多边形偏移单位  
        }))
        plane.renderOrder = 3
        this.add(plane);
        this.plane = plane;
        if (info.hasBox) {
            this.addBox(true)
        }
        overlayGroup.add(this);

        if (info.media) {
            if (info.media.includes('video')) {
                var video = $('<video controls="controls" loop autoplay x5-playsinline="" webkit-playsinline="true" playsinline="true" controlslist="nodownload"></video>')[0]
                video.setAttribute("crossOrigin", 'Anonymous')
                //要在src设置好前解决跨域
                $(video).on('contextmenu', function() {
                    return false;
                });
                //禁止右键点击出

                video.src = manage.dealURL(info.file);
                info.media = video;
                info.type = "video"

                video.addEventListener('loadeddata', ()=>{
                    console.log(this.sid + " loaded!!!")
                }
                )
                video.volume = 0
                video.muted = true
                plane.material.opacity = 1;
            } else if (info.media.includes('photo')) {
                /* var img = new Image();
                 
                img.src = manage.dealURL(info.file) //"https://4dkk.4dage.com/images/images"+Config.projectNum+"/overlay"+this.sid+".jpg?m="+new Date().getTime()
                info.media = img
                 */

                info.type = "photo"
                plane.material.opacity = 0.1;
            }

            plane.material.color = new THREE.Color(1,1,1)
        }
        if (info.width == void 0)
            info.width = settings.overlay.width;
        if (info.height == void 0)
            info.height = settings.overlay.height;
        this.setFromInfo(info)
        this.fileSrc = info.file

    }

    Overlay.prototype.setFromInfo = function(info) {
        //1 恢复到编辑之前 2 初始加载 
        var plane = this.plane;
        this.transformAtPanos = info.transformAtPanos || {}
        //在每个漫游点独立设置的position。  
        var curPanoTransform = player.currentPano && this.transformAtPanos[player.currentPano.id] || {}

        info.depth && this.scale.setZ(info.depth / settings.overlay.depth)

        this.posCustom = info.pos ? info.pos.clone() : this.position.clone();
        //没有单独设置position的漫游点使用的position
        this.position.copy(curPanoTransform.pos || this.posCustom)

        this.quaCustom = info.qua ? info.qua.clone() : this.quaternion.clone()
        this.quaternion.copy(curPanoTransform.qua || this.quaCustom);

        this.widthCustom = info.width
        this.heightCustom = info.height
        this.width = curPanoTransform.width || this.widthCustom
        this.height = curPanoTransform.height || this.heightCustom
        var a = this.getScaleBySize(this.width, this.height)
        this.scale.setX(a.x)
        this.scale.setY(a.y)

        if (info.type) {
            if (!plane.material.map) {
                if (info.type == "video") {
                    plane.material.map = new THREE.VideoTexture(info.media);
                    this.hasRequestLoad = true

                    plane.material.map.wrapS = plane.material.map.wrapT = THREE.ClampToEdgeWrapping;
                    plane.material.map.minFilter = THREE.LinearFilter;
                    plane.material.map.magFilter = THREE.LinearFilter;
                    plane.material.map.generateMipmaps = true;

                } else {
                    this._loadDones = []
                    /* plane.material.map = Texture.load(info.file,()=>{
                        if(this._loadDones){
                            this._loadDones.forEach(e=>e())
                            this._loadDones = null
                        }
                    })  */
                }
                /* plane.material.map.wrapS = plane.material.map.wrapT = THREE.ClampToEdgeWrapping;
                plane.material.map.minFilter = THREE.LinearFilter;
                plane.material.map.magFilter = THREE.LinearFilter;
                plane.material.map.generateMipmaps = true;  */
            } else
                plane.material.map.image = info.media;
            this.file = info.file;
        }
        this.overlayType = info.type;

        if (!!this.hasBox != !!info.hasBox) {
            this.addBox(!this.hasBox);
        }

        this.updateMatrixWorld()
        this.getVisiblePanos()

    }

    Overlay.prototype.addBox = function(state) {
        if (state == !!this.hasBox) {
            return;
        }
        if (state) {
            var box = new THREE.Mesh(_boxGeometry,_boxMat)
            box.position.set(0, 0, settings.overlay.depth / 2);
            box.renderOrder = 3
            this.plane.position.set(0, 0, settings.overlay.depth);
            this.add(box);
            this.box = box;

        } else {
            this.plane.position.set(0, 0, 0);
            this.remove(this.box);
            this.box = null;
        }
        this.hasBox = state
    }

    Overlay.prototype.getSizeByScale = function() {
        return {
            width: settings.overlay.width * this.scale.x,
            height: settings.overlay.height * this.scale.y
        }
    }
    Overlay.prototype.getScaleBySize = function(width, height) {
        return {
            x: width / settings.overlay.width,
            y: height / settings.overlay.height,
        }
    }

    Overlay.prototype.preDeal = function(info) {
        info.pos = new THREE.Vector3().fromArray(info.pos)
        info.qua = new THREE.Quaternion().fromArray(info.qua)
        info.width = parseFloat(info.width)
        info.height = parseFloat(info.height)
        info.depth = parseFloat(info.depth)
        info.hasBox = parseInt(info.hasBox)
        info.pos.x = parseFloat(info.pos.x)
        info.pos.y = parseFloat(info.pos.y)
        info.pos.z = parseFloat(info.pos.z)
        info.qua.x = parseFloat(info.qua.x)
        info.qua.y = parseFloat(info.qua.y)
        info.qua.z = parseFloat(info.qua.z)
        info.qua.w = parseFloat(info.qua.w)

        if (!info.transformAtPanos)
            info.transformAtPanos = {}

        for (let i in info.transformAtPanos) {
            info.transformAtPanos[i].pos = new THREE.Vector3().fromArray(info.transformAtPanos[i].pos)
            info.transformAtPanos[i].qua = new THREE.Quaternion().fromArray(info.transformAtPanos[i].qua)

        }

    }

    Overlay.prototype.getVisiblePanos = function() {
        this.visiblePanos = getVisiblePano(this.plane.getWorldPosition(), {
            model: null
        });

    }
    
    
    Overlay.prototype.updateVisibles = function(panos) {
        this.visible = !!panos.find(pano=>this.visiblePanos.includes(pano))
        if (!this.visible && this.overlayType == 'video')
            this.plane.material.map.image.pause()
    }
    
    
    Overlay.updateVisibles = function(panos) {
        if (panos === true) {
            player.overlayGroup.children.forEach(e=>e.visible = true)
        } else {
            player.overlayGroup.children.forEach(e=>e.updateVisibles(panos))
        }
    }

    Overlay.prototype.addToLoadQueue = function() {
        if (this.overlayType == 'photo') {
            Overlay.loadQueue.includes(this) || Overlay.loadQueue.push(this)

        }
    }
    
    
    Overlay.prototype.requestDownload = function() {
        if (this.hasRequestLoad || this.overlayType != 'photo')
            return

        console.log('overlay beginDownload : ' + this.sid)
        var plane = this.plane;

        plane.material.map = Texture.load(this.file, ()=>{
            plane.material.needsUpdate = true
            if (this._loadDones) {
                this._loadDones.forEach(e=>e())
                this._loadDones = null
            }
            setTimeout(Overlay.loadNext, 50)
            plane.material.opacity = 1;
            console.log('overlay loaded: ' + this.sid)
        })
        plane.material.map.wrapS = plane.material.map.wrapT = THREE.ClampToEdgeWrapping;
        plane.material.map.minFilter = THREE.LinearFilter;
        plane.material.map.magFilter = THREE.LinearFilter;
        plane.material.map.generateMipmaps = true;

        this.hasRequestLoad = true
    }

    Overlay.loadQueue = [];

    Overlay.getNeedLoad = function() {
        if (!player || !player.domElement || !player.mode)
            return;

        if (player.mode != 'panorama') {
            if (!Overlay.loadWhenOutside)
                return; 

            if (Overlay.loadQueue.length == 0) {
                Overlay.loadQueue = player.overlayGroup.children.filter(e=>!e.hasRequestLoad).slice(0, 5);
            }

            return;
        }
        Overlay.loadWhenOutside = true
        var overlays = player.overlayGroup.children.filter(e=>!e.hasRequestLoad && e.visiblePanos.includes(player.currentPano))
        //var maxAngle = THREE.Math.degToRad( cameraLight.getHFOVFromVFOV(70, player.domElement.clientWidth, app.player.domElement.clientHeight) / 2);
        var cameraDir = player.getDirection()

        /* var maxCount = 5; 
        if(overlays.length>maxCount){
            for(var i=0;i<overlays.length;i++){ 
                //角度为可见范围 
                var v1 = cameraDir.clone().setY(0);
                var v2 = overlays[i].plane.getWorldPosition().sub(player.position).setY(0)
                if(v1.angleTo(v2) <= maxAngle){
                    Overlay.loadQueue.push(overlays[i])
                    if(Overlay.loadQueue.length>=10) break;
                }  
            } 
            if(Overlay.loadQueue.length<Overlay.maxLoadingCount){
                Overlay.loadQueue.push()
            }
        }else{ */
        Overlay.loadQueue = overlays
        //} 

        var request = [(overlay)=>{
            return true
        }
        ];
        var rank = [(overlay)=>{
            var dis = overlay.plane.getWorldPosition().distanceTo(player.position);
            return -dis
        }
        , (overlay)=>{
            var tagDir = overlay.plane.getWorldPosition().sub(player.position)
            var angle = tagDir.angleTo(cameraDir)
            return -angle * 20
        }
        ]
        var result = sortByScore(Overlay.loadQueue, request, rank);
        Overlay.loadQueue = result ? result.slice(0, 5).map(e=>e.item) : player.overlayGroup.children.filter(e=>!e.hasRequestLoad).slice(0, 2);

    }

    Overlay.maxLoadingCount = 3;
    Overlay.loadNext = ()=>{

        var loadings = player.overlayGroup.children.filter(e=>e.hasRequestLoad && e._loadDones)//开始下载了但是没加载好的
        
        Overlay.loadQueue.slice(0, Overlay.maxLoadingCount - loadings.length).forEach(e=>e.requestDownload())
        Overlay.loadQueue.splice(0, Overlay.maxLoadingCount - loadings.length)
    }

    Overlay.load = ()=>{
        Overlay.getNeedLoad() 
        Overlay.loadNext()
        var unloads = player.overlayGroup.children.filter(e=>!e.hasRequestLoad)
        if (unloads.length) {
            setTimeout(Overlay.load, 200)
        } else {
            Overlay.allRequestLoad = true
            console.log('allRequestLoad')
        }
    }

    window.Overlay = Overlay;

}