exports.handle = (event, context, callback) => {
	try {
		var response = getResponse(event);
		// 返回正常结果
		callback(null, response);
	} catch(e) {
		// 将异常错误信息返回
 		callback(e, null);
	}
};

// 从请求参数中获取意图和词槽，此处将意图和词槽转换为String
function writeIntentAndSlotsAsString(event) {
	var intentAndSlotsInfo = JSON.parse(event.Payload.intentAndSlotsInfo);
	var slotArr = intentAndSlotsInfo.slots;
	var body = "";

	body = body + "intent:" + intentAndSlotsInfo.intentName;
	slotArr.forEach(function(slot) {
		body = body + "name: " + slot.slotName + ",value: " + slot.slotValue + ";";
	});

	return body;
}

function getResponse(event) {
	var  intentAndSlotsString = writeIntentAndSlotsAsString(event);
	// 生成要返回的指令
	var directives = new Array();
	directives.push(generateSpeakDirective(intentAndSlotsString));
    directives.push(generateTextDirective(intentAndSlotsString));
    
	var response = {
		"logId":event.Payload.logId, // 将传入的logId原样返回，以方便定位问题
		"directives":directives
	};
	return response;
}

function generateSpeakDirective(text) {
	var directive = {
		"header":{
			"namespace":"baidu.abcrobot.directive.voice_output",
			"name":"Speak",
		},
		"payload":{
			"content":text
		}
	}
	return directive;
}

function generateTextDirective(text) {
	var directive = {
		"header":{
			"namespace":"baidu.abcrobot.directive.text_output",
			"name":"Text",
		},
		"payload":{
			"content":text
		}
	}
	return directive;
}