window.em_ssoInit && em_ssoInit();
var retryTimes = 0;
function getEm(callback){
    if(window.em){
        callback && callback(em);
        return;
    }
    setTimeout(function(){
        if(window.em){
            callback && callback(em);
        }else{
            if(retryTimes < 10){
                retryTimes++;
                getEm(callback);
            }else{
                alert('em对象不存在，重试次数：' + retryTimes);
            }
        }
    }, 100);
}

function invokeEmApi(name){
	var args = [].slice.call(arguments).slice(1);
    
	em.ready(function(){
		em[name].apply(em, args);
	});
}

function scanQRCode4EM7(callback){
    getEm(function(em){
    	invokeEmApi("scanQRCode", {
            needResult:1,
            scanType: ["qrCode", "barCode"], // 可以指定扫二维码还是一维码，默认二者都有
            success: function (res) {
                callback && callback(res.resultStr);
            }
        });
    });
}

function getLocation4EM7(callback){
    getEm(function(em){
    	invokeEmApi("getLocation", {
            type: 'gcj02', // 默认为wgs84的gps坐标，如果要返回直接给openLocation用的火星坐标，可传入'gcj02'
            success: function (res) {
                callback && callback(","+res.latitude+","+res.longitude+",");
            }
        });
    });
}

function chooseImage4EM7(sourceType, callback){
    getEm(function(em){
    	invokeEmApi("chooseImage", {
            count: 1, // 最大可选照片数，默认9
            sourceType: sourceType, // 可以指定来源是相册还是相机，默认二者都有 ['album', 'camera']
            success: function (res) {
                var localIds = res.localIds; // 返回选定照片的本地ID列表
                top && typeof(top.showLoading) === 'function' && top.showLoading();
                localIds.forEach(function(localId){
                    em.getLocalImgData({
                        localId: localId,
                        success: function(res){
                            top && typeof(top.hideLoading) === 'function' && top.hideLoading();
                            callback && callback("data:image/jpeg;base64," + res.localData);
                        }
                    });
                });
            }
        });
    });
}

function getAudioRecord4EM7(callback){
    getEm(function(em){
    	invokeEmApi("getAudioRecord", {
            success: function(res){
                var localData = res.localData;
                callback && callback(localData);
            }
        });
    });
}

function navigationLBS4EM7(startLat, startLng, endLat, endLng, destAddr){
    getEm(function(em){
    	invokeEmApi("navigationLBS", {
            startLatitude: startLat,
            startLongitude: startLng,
            endLatitude: endLat,
            endLongitude: endLng,
            address: destAddr
        });
    });
}

function downloadImage4EM7(url){
    getEm(function(em){
    	invokeEmApi("downloadImage", {
            url: url,
            isShowProgressTips: 1,
            success: function(){
                top && typeof(top.Dialog) === 'function' && top.Dialog('保存成功');
            }
        });
    });
}

function downloadAttach4EM7(url, title, type){
    getEm(function(em){
    	invokeEmApi("openLink", {
            title: title,
            url: url,
            openType: type || 2 // 打开方式 1:当前窗口 2:新窗口 3:系统默认浏览器
        });
    });
}