import DownloadMgr from "./DownloadMgr";

class LoadMgr{
    constructor() {
        console.log('LoadMgr初始化');
        this.bNeedRestart = true;
        this.downloadProgress = 0;
        this.manifestUrl = null;
    }

    setManifest(manifest){
        this.manifestUrl = manifest;
    }

    startLoading(){
        if(!cc.sys.isNative){ //非app模式
            this.bNeedRestart = false;
        }else{
            //开始检测热更新
            let savePath = "storagePath_0";
            DownloadMgr.createDownLoad(this.manifestUrl, savePath, this.updateCb.bind(this));
        }
    }

    updateCb(event){
        let needRestart = false;
        let failed = false;
        switch (event.getEventCode()) {
            case jsb.EventAssetsManager.ERROR_NO_LOCAL_MANIFEST:
                //this.panel.info.string = 'No local manifest file found, hot update skipped.';
                failed = true;
                break;
            case jsb.EventAssetsManager.UPDATE_PROGRESSION:
                //this.panel.byteProgress.progress = event.getPercent();
                //this.panel.fileProgress.progress = event.getPercentByFile();

                //this.panel.fileLabel.string = event.getDownloadedFiles() + ' / ' + event.getTotalFiles();
                //this.panel.byteLabel.string = event.getDownloadedBytes() + ' / ' + event.getTotalBytes();

                if (isNaN(event.getPercentByFile())) {
                    this.downloadProgress = 0;
                } else {
                    this.downloadProgress = event.getPercentByFile();
                }

                var msg = event.getMessage();
                if (msg) {
                    //this.panel.info.string = 'Updated file: ' + msg;
                    // cc.log(event.getPercent()/100 + '% : ' + msg);
                }
                break;
            case jsb.EventAssetsManager.ERROR_DOWNLOAD_MANIFEST:
            case jsb.EventAssetsManager.ERROR_PARSE_MANIFEST:
                //this.panel.info.string = 'Fail to download manifest file, hot update skipped.';
                failed = true;
                break;
            case jsb.EventAssetsManager.ALREADY_UP_TO_DATE:
                //this.panel.info.string = 'Already up to date with the latest remote version.';
                failed = true;
                break;
            case jsb.EventAssetsManager.UPDATE_FINISHED:
                //this.panel.info.string = 'Update finished. ' + event.getMessage();
                needRestart = true;
                break;
            case jsb.EventAssetsManager.UPDATE_FAILED:
                //this.panel.info.string = 'Update failed. ' + event.getMessage();
                //this.panel.retryBtn.active = true;
                //this._updating = false;
                //this._canRetry = true;
                if (DownloadMgr.iFailDownCount >= 10) {
                    failed = true;
                }
                break;
            case jsb.EventAssetsManager.ERROR_UPDATING:
                //this.panel.info.string = 'Asset update error: ' + event.getAssetId() + ', ' + event.getMessage();
                break;
            case jsb.EventAssetsManager.ERROR_DECOMPRESS:
                //this.panel.info.string = event.getMessage();
                break;
            default:
                break;
        }

        if (failed) {
            this.bNeedRestart = false;
        }

        if (needRestart) {
            //this._am.setEventCallback(null);
            //this._updateListener = null;
            // Prepend the manifest's search path
            var searchPaths = jsb.fileUtils.getSearchPaths();
            //var newPaths = this._am.getLocalManifest().getSearchPaths();
            var newPaths = DownloadMgr.getSearchPaths();
            console.log(JSON.stringify(newPaths));
            Array.prototype.unshift.apply(searchPaths, newPaths);
            // This value will be retrieved and appended to the default search path during game startup,
            // please refer to samples/js-tests/main.js for detailed usage.
            // !!! Re-add the search paths in main.js is very important, otherwise, new scripts won't take effect.
            cc.sys.localStorage.setItem('HotUpdateSearchPaths', JSON.stringify(searchPaths));
            jsb.fileUtils.setSearchPaths(searchPaths);

            // cc.audioEngine.stopAll();
            setTimeout(() => {
                console.log("更新完成，重启游戏");
                cc.game.restart();
            }, 100);

        }
    }

}

let instance = null;
LoadMgr.getInstance = function(){
    if(!instance){
        instance = new LoadMgr();
    }
    return instance;
}

export default LoadMgr.getInstance();