import * as THREE from "../../../../../libs/three.js/build/three.module.js";
 
import TilePrioritizer from './TilePrioritizer.js'
import TileUtils from './TileUtils.js' 
 
 
import {settings, config} from '../../../settings.js' 
import {
    http
} from '../../../utils/request.js' 

let {TileDownloaderEvents, DownloadStatus} = Potree.defines


window.downloaded = {}
window.startdownloads = [];




class TileDownloader extends THREE.EventDispatcher{
    constructor( ) {
        super()
        this.panos = null;
        this.retryMinimumTime = 1e4;
        this.panoLoadCallbacks = {};
        this.downloadDescriptors = {};
        this.priorityQueue = [];
        this.forceQueue = [];
        this.activeDownloads = [];
        this.tilePrioritizer = null;
        this.refreshInterval = null;
        this.processPriorityQueue = !1;
        this.concurrentDownloads = 6;//e.concurrentDownloads || 1;
        this.downloadTestResults = {};

        this.freeze = Object.freeze({
            Testing: 1,
            Success: 2,
            Fail: 3
        });
        
                                                                                  
         
        viewer.addEventListener('pageVisible', (e)=>{//不可见时不refreshUpdateInterval 
            //console.log('visibilitychange:', state)
            viewer.updateVisible(this,  'pageVisible', e.v) 
            this.judgeStart() 
        }) 
        
        this.visible = true //add   借用viewer.updateVisible来判断是否start
        if(Potree.settings.useDepthTex){
            this.judgeStart()  //开始下载depthTex
        }else{ 
            viewer.updateVisible(this,'showPanos', false ) //默认visible = false
        }
        
    }

    setPanoData(e, t /* , i */) {
        this.panos = e,
        this.imagePanos = t 
          //  this.panoGroupId = i
    }
  
    start() { 
        this.downloadCubeTex = true 
        if(!Potree.settings.useDepthTex){
            viewer.updateVisible(this,'showPanos', true )
            this.judgeStart()            
        }else{
            this.refreshInterval || this.judgeStart()
        }
    }

    stop() {
        this.downloadCubeTex = false
        if(!Potree.settings.useDepthTex){
            viewer.updateVisible(this,'showPanos', false )
            this.judgeStart()
        } 
    }

    judgeStart(){//add
        if(this.visible){
            //console.log('judgeStart true')
            this.started = true 
            this.refreshUpdateInterval(0)
        }else{
            //console.log('judgeStart false')
            this.started = false
            window.clearTimeout(this.refreshInterval)
        }
        
    }

    refreshUpdateInterval(e) {
        e || (e = 0),
            this.refreshInterval = window.setTimeout(function() {
                    var e = this.update();
                    e ? this.refreshUpdateInterval(TileDownloader.ACTIVE_REFRESH_DELAY) : this.refreshUpdateInterval(TileDownloader.IDLE_REFRESH_DELAY)
                }
                .bind(this), e)
    }

    update() { 
        if(this.downloadCubeTex){ //可以下载贴图
            var e = this.forceQueue.length > 0;
            this.processQueueForDownloading(this.forceQueue);
            if (this.processPriorityQueue) {
                this.queuePrioritizedTilesForPanos(this.panos);
                this.priorityQueue.length > 0 && (e = !0);
                this.processQueueForDownloading(this.priorityQueue);
            }
            return e 
        }else{//仅下载depthTex
            this.tilePrioritizer.filterDepthTex(this.panos)
        }
        
    }

    

    queuePrioritizedTilesForPanos(e) {
        this.tilePrioritizer && (this.clearQueue(this.priorityQueue),
            this.tilePrioritizer.filterAndPrioritize(this.priorityQueue, e, this),
            this.clearFromQueue(this.priorityQueue, DownloadStatus.None, !0),  //去除state为DownloadStatus.None的（可能是去除已经在下载的）
            this.setStatusOrRemoveForAllDescriptors(this.priorityQueue, DownloadStatus.Queued))
    }

    clearQueue(e) {//停止下载并清空
        this.setStatusForAllDescriptors(e, DownloadStatus.None),
            e.length = 0
    }
    
    clearForceQueue() {
        this.clearQueue(this.forceQueue)
    }
    
    clearFromQueue(e, t, i) {
        for (var n = 0; n < e.length; n++) {
            var r = e[n];
            r && (t === r.status && !i || t !== r.status && i) && (e[n] = null)
        }
    }

    setStatusForAllDescriptors(e, t) {
        for (var i = 0; i < e.length; i++) {
            var n = e[i];
            n && (n.status = t)
        }
    }

    setStatusOrRemoveForAllDescriptors(e, t) {
        for (var i = 0; i < e.length; i++) {
            var n = e[i];
            n && (n.status !== t ? n.status = t : e[i] = null)
        }
    }

    getTileDownloadDescriptors(pano, size) {//获取该pano的该size的全部的tile的descriptor
        var i = this.getAllTileDownloadDescriptorsForPano(pano),
            n = i[size];
        return n || (n = this.buildDownloadDescriptorArray(size),//创建的全部是空的
                i[size] = n,
                this.initTileDownloadDescriptors(n, pano, size)),//绑定到该pano size
            n
    }

    getAllTileDownloadDescriptorsForPano(pano) {//新建空Descriptors
        var t = this.downloadDescriptors[pano.id];
        return t || (t = {},
                this.downloadDescriptors[pano.id] = t),
            t
    }

    processQueueForDownloading(e, t) {//执行下载任务
        this.cleanupActiveDownloads();
        if (this.activeDownloads.length < this.concurrentDownloads || t) {
            var i = t ? e.length : this.concurrentDownloads - this.activeDownloads.length;

            for (var n = 0, r = 0; n < i && e.length > 0; r++) {
                var o = e.shift();
                
                
                if(o){
                    //add 为了防止1024的在512前下载完，这里强行等待512下载完毕再开始下载
                    if(o.panoSize > 512 && !this.isPanoDownloaded(o.pano, 512) ){
                        //console.log('512的还没下载好呢！')
                        e.push(o)
                        break;//一般512的都是连续下载的，所以后面就都不是512了直接中断 
                    } 
                    
                    this.startDownload(o)
                    n++
                }
                
            }
        }
    } 
    
    
    
    
    testDownload(panoSize, tileSize, callback) {
        var n = this.downloadTestResults[panoSize];
        if (n)
            return void(n === this.freeze.Success ? callback(!0) : n === this.freeze.Fail && callback(!1));
        this.downloadTestResults[panoSize] = this.freeze.Testing;
        var r = this.panos[0],
            o = this.getTileUrl({pano:r, panoSize, tileSize, tileIndex:0}   /* r.id, panoSize, tileSize, 0 */),
            a = function(t) {
                this.downloadTestResults[panoSize] = this.freeze.Success,
                    callback(!0)
            }
            .bind(this),
            s = function() {
                this.downloadTestResults[panoSize] = this.freeze.Fail,
                    callback(!1)
            }
            .bind(this);
        this.loadImage(o, 0, a, s)
    }

    startDownload(e) {//开始下载啦
        //console.log('startDownload')
        
        startdownloads.push(e) 
        e.local2SrcFailed = this.local2SrcFailed
        e.status = DownloadStatus.Downloading;
        var t = this.getTileUrl(e/* e.pano.id, e.panoSize, e.tileSize, e.tileIndex, e.pano.alignmentType */);//xzw add alignmentType
        if(!t)return;
        this.activeDownloads.push(e);
        this.loadImage(t, TileDownloader.DOWNLOAD_RETRIES, this.downloadComplete.bind(this, e), this.downloadFailed.bind(this, e))
    }

    downloadFailed(e, t) {
        //add 
        if(Potree.settings.isLocal2 && !e.local2SrcFailed){//为了兼容旧的数据src，如果新src没加载成功，就加载旧的
            e.local2SrcFailed = this.local2SrcFailed = true
            //this.startDownload(e)//重新下载
            var t = this.getTileUrl(e); 
            this.loadImage(t, TileDownloader.DOWNLOAD_RETRIES, this.downloadComplete.bind(this, e), this.downloadFailed.bind(this, e))
 
        }
    }

    downloadComplete(e, t) {//下载成功时
        //if (e.panoGroupId === this.panoGroupId) {
            var i = this.getPanoLoadCallbacks(e.pano, e.panoSize);
            e.status = DownloadStatus.Downloaded,
                i && i.onProgress && i.onProgress(e.pano, e.panoSize);
            var n = {
                panoId: e.pano.id,
                image: t,
                tileSize: e.tileSize,
                panoSize: e.panoSize,
                tileIndex: e.tileIndex,
                faceTileIndex: e.faceTileIndex,
                totalTiles: e.totalTiles,
                face: e.face,
                tileX: e.tileX,
                tileY: e.tileY,
                direction: e.direction
            };
            
            downloaded[e.pano.id] || (downloaded[e.pano.id]={512:[],1024:[],2048:[]})
            downloaded[e.pano.id][e.panoSize] || (downloaded[e.pano.id][e.panoSize] = [])
            downloaded[e.pano.id][e.panoSize].push(e)
            if(e.panoSize != 512 && downloaded[e.pano.id][512].length<6){
                console.warn('没下完')
            }
            
            
            
            e.image = t,
            this.dispatchEvent({type:TileDownloaderEvents.TileDownloadSuccess, desc:n} ) 
            this.isPanoDownloaded(e.pano, e.panoSize) && (n = {
                    panoId: e.pano.id,
                    tileSize: e.tileSize,
                    panoSize: e.panoSize
                },
                this.dispatchEvent({type:TileDownloaderEvents.PanoDownloadComplete, desc:n}),
                i && i.onLoad && i.onLoad(e.pano, e.panoSize))
        //}
    }


    isPanoDownloaded(e, t) {
        var i = this.getTileDownloadDescriptors(e, t);
        if (i.length <= 0)
            return !1;
        for (var n = 0; n < i.length; n++) {
            var r = i[n];
            if (r.status !== DownloadStatus.Downloaded)
                return !1
        }
        return !0
    }

    setPanoLoadCallbacks(e, t, i, n, r) {
        var o = e.id + ":" + this.qualityManager.getPanoSize(t);
        this.panoLoadCallbacks[o] = {
            onLoad: i,
            onFail: n,
            onProgress: r
        }
    }

    getPanoLoadCallbacks(e, t) {
        var i = e.id + ":" + t;
        return this.panoLoadCallbacks[i]
    }

    buildDownloadDescriptorArray(e) {
        for (var t = TileUtils.getTileCountForSize(e), i = [], n = 0; n < t; n++) {
            var r = this.buildDownloadDescriptor();
            i.push(r)
        }
        return i
    }

    buildDownloadDescriptor() {//Descriptor!
        var e = {
            panoGroupId: null,
            pano: null,
            panoSize: -1,
            tileSize: -1,
            tileIndex: -1,
            totalTiles: -1,
            faceTileIndex: -1,
            status: DownloadStatus.None,
            url: null,
            image: null,
            direction: new THREE.Vector3, //该tile在cube中的方向
            face: -1,
            cubeFace: -1,
            tileX: -1,
            tileY: -1
        };
        return e
    }

    initTileDownloadDescriptors(e, t, i) {
        for (var n = 0; n < e.length; n++) {
            var r = e[n];
            this.initTileDownloadDescriptor(r, t, i, n)
        }
    }

    initTileDownloadDescriptor(desc, pano, size, index) {
        var r = size >= TileUtils.TILE_SIZE ? TileUtils.TILE_SIZE : size;
        desc.face = TileUtils.getFaceForTile(size, index);//根据顺序得到的face的index
        desc.cubeFace = TileUtils.mapFaceToCubemapFace(desc.face);//为了贴图而转化的face index
        //desc.panoGroupId = this.panoGroupId;//就是场景号
        desc.pano = pano;
        desc.panoSize = size;
        desc.tileSize = r;      //瓦片图size 512
        desc.tileIndex = index;
        desc.totalTiles = TileUtils.getTileCountForSize(size);
        desc.status = DownloadStatus.None;
        desc.image = null;
        TileUtils.getTileLocation(desc.panoSize, desc.tileIndex, desc);//得到该tile在这个face中的具体位置（tileX等）
        TileUtils.getTileVector(desc.panoSize, desc.tileSize, desc.cubeFace, desc.tileX, desc.tileY, TileUtils.LocationOnTile.Center, 0, desc.direction);
    }

    

    getTiles(d, sceneNum, useV4url){
        if(Potree.settings.isLocal2 && !this.local2SrcFailed || useV4url){//新的地址  scene_view_data/场景码/images/tiles
            return `${Potree.settings.urls.prefix3}/scene_view_data/${sceneNum}/images/${d}`    
        }
        
        return `${Potree.settings.urls.prefix3}/images/images${sceneNum}/${d}`    
    }

    loadImage(e, t, i, n) {
        //自己修改了ajax，把getImage改成了loadImg
        http.loadImage(e, t).then(function(e) {
            i(e)
        }).fail(n)
    }
}
TileDownloader.prototype.forceQueueTilesForPano = function() {//根据条件开始加载tile
    var e = [],
        t = [];
    return function(pano, size, dir, hFov, vFov, download) { 
        e.length = 0;
        for (var u = this.getTileDownloadDescriptors(pano, size), d = 0; d < u.length; d++) {
            var p = u[d];
            p.status !== DownloadStatus.None && p.status !== DownloadStatus.Queued || e.push(p)
        }
        if (dir && e.length > 0) {
            TilePrioritizer.sortPanoTiles(e, pano, dir) //按最佳方向排序e
            t.length = 0 
            TileUtils.matchingTilesInDirection(pano, size, dir, hFov, vFov, t);//得到在符合视野标准的集合t
            
            
            
            for (var f = 0, g = function(e) {
                return e.face === m.face && e.faceTileIndex === m.faceTileIndex
            }; f < e.length;) {  //过滤掉不符合角度要求的
                var m = e[f],
                    v = t.findIndex(g);
                v < 0 ? e.splice(f, 1) : f++
            }
        }
        for (var A = 0; A < e.length; A++){
            this.forceQueue.push(e[A]);         //装载
        }
        /* if(e.length){
            console.log(e)
        } */
        
        this.setStatusForAllDescriptors(this.forceQueue, DownloadStatus.ForceQueued);
        this.clearFromQueue(this.priorityQueue, DownloadStatus.ForceQueued, !1);
        download && this.processQueueForDownloading(this.forceQueue, !0);
    }
}()

TileDownloader.prototype.cleanupActiveDownloads = function() {
    var e = [];
    return function() {
        e.length = 0;
        for (var t = 0; t < this.activeDownloads.length; t++) {
            var i = this.activeDownloads[t];
            i.status !== DownloadStatus.Downloaded && i.status !== DownloadStatus.Failed && e.push(i)
        }
        this.activeDownloads.length = 0,
        this.activeDownloads.push.apply(this.activeDownloads, e)
    }
}()

TileDownloader.prototype.getTileUrl = function() {
    var e = {
            256: "256",
            512: "512",
            1024: "1k",
            2048: "2k",
            4096: "4k"
        },
        t = {
            face: -1,
            faceTileIndex: -1,
            tileX: -1,
            tileY: -1
        };
    
    return function(o={}  ) {  
        var id = o.pano.originID, ////////
            panoSize = o.panoSize,
            tileSize = o.tileSize,
            tileIndex = o.tileIndex,
            sceneCode = o.pano.pointcloud.sceneCode,
            useV4url = Potree.settings.testV4url /* && o.pano.pointcloud.useV4url */     //v4的全景图等路径不一样  
        var metadata = {sceneScheme:10}  
        
        
        TileUtils.getTileLocation(panoSize, tileIndex, t);
        var s = Math.floor(panoSize / tileSize),
            l = s * s,
            h = Math.floor(tileIndex / l),
            u = "",
            d = '',  g = '';
        
        
        
        if(Potree.settings.isLocal){//原始规则
            //1 === config.tiling.customCompression && (u = "_" + config.tiling["q" + e[panoSize]]);
            //1 === o.tiling.customCompression && (u = "_" + o.tiling["q" + e[n]]);
            d = "tiles/" + id + "/" + e[panoSize] + u + "_face" + h + "_" + t.tileX + "_" + t.tileY + ".jpg" 
            d =  this.getTiles(d, sceneCode, useV4url);
            g = "?"  
          
        }else{//阿里云oss的规则   if (metadata.sceneScheme == 10) 
            
            d = 'tiles/4k/' + id + '_skybox' + h + '.jpg?x-oss-process=';
            if (e[panoSize] == '512') {
                d += 'image/resize,h_512';
            } else {
                //4k的图，移动端是1k，pc端是2k，放大才是4k
                if (e[panoSize] == '1k' || e[panoSize] == '2k') {  //https://4dkk.4dage.com/images/imagesx4iqYDG3/tiles/4k/122_skybox0.jpg?x-oss-process=image/resize,m_lfit,w_1024/crop,w_512,h_512,x_511,y_0
                    d += 'image/resize,m_lfit,w_' + panoSize + '/crop,w_512,h_512,';
                } else {
                    d = 'tiles/4k/' + id + '_skybox' + h + '.jpg?x-oss-process=image/crop,w_512,h_512,';
                }
                //起始位置
                if (t.tileX == 0) {
                    d += 'x_0,';
                } else {
                    d += 'x_' + (512 * t.tileX - 1) + ',';
                }

                if (t.tileY == 0) {
                    d += 'y_0';
                } else {
                    d += 'y_' + (512 * t.tileY - 1);
                } 
            }
            
            d = this.getTiles(d, sceneCode, useV4url);
            g = "&" 
        } 
        
        d += g + 'time='+o.pano.pointcloud.timeStamp  //加后缀
         
        return d;
    }
}();

TileDownloader.tilegen = true;
TileDownloader.IDLE_REFRESH_DELAY = 500;
TileDownloader.ACTIVE_REFRESH_DELAY = 16;
TileDownloader.DOWNLOAD_RETRIES = 4;




/* 
源：https://4dkk.4dage.com/images/imagesSS-t-ZZR7oKnlIl
目标：https://4dkk.4dage.com/scene_view_data/SS-t-ZZR7oKnlIl/images

源：https://4dkk.4dage.com/data/dataSS-t-ZZR7oKnlIl
目标：https://4dkk.4dage.com/scene_view_data/SS-t-ZZR7oKnlIl/data

源：https://4dkk.4dage.com/video/videoSS-t-ZZR7oKnlIl
目标：https://4dkk.4dage.com/scene_view_data/SS-t-ZZR7oKnlIl/video
 */


// var tileconc = TileDownloader.tilegen ? 6 : 2;
// publicObjectSet.tileDownloader = new TileDownloader({
//     concurrentDownloads: tileconc
// });

// export default new  TileDownloader({
//     concurrentDownloads: TileDownloader.tilegen ? 6 : 2
// })


/* export default new TileDownloader({
    concurrentDownloads: TileDownloader.tilegen ? 6 : 2
}) */

export default TileDownloader