// MQTT工具包 - 兼容H5、App、微信小程序
// 参考：https://blogs.seecsdn.cn/online/2025-09-27/0ecf1401e23b25be5f8c7e4377d8b5dd.html

let mqtturl;

// #ifdef H5
mqtturl = "ws://122.51.194.184:8083/mqtt";
import * as mqtt from "mqtt/dist/mqtt.min.js";
// #endif

// #ifdef APP-PLUS || MP-WEIXIN
mqtturl = "wx://122.51.194.184:8083/mqtt";
import * as mqtt from "mqtt/dist/mqtt.min.js";
//#endif

// #ifdef MP-ALIPAY
mqtturl = "alis://122.51.194.184:8083/mqtt";
import * as mqtt from "@/utils/mqtt.min.js";
//#endif

function messageid2() {
	// 2位随机数
	return Math.floor(Math.random() * (99 - 10)) + 10;
}

var client;

// 创建MQTT连接
const createMqtt = () => {
	let options = {
		keepalive: 30,
		clientId: `mobile-inspection-system-${messageid2()}`, // 客户端ID
		protocolId: 'MQTT',
		username: "dmbroker",
		password: "qwer1234",
		protocolVersion: 4,
		clean: true,
		reconnectPeriod: 1000, // reconnectPeriod为1000毫秒，这意味着在连接丢失之后，客户端将在1秒后尝试重新连接。
		connectTimeout: 5000, // 5s超时时间 意味着mqtt-reconnect函数5秒钟触发一次
		topic: "HDYDCJ_01_DOWN",
		rejectUnauthorized: false,
		// #ifdef MP-ALIPAY
		my: my,//注意这里的my
		//#endif
	}

	try {
		if (!client) {
			console.log('🔧 开始创建MQTT连接...');
			console.log('🔧 MQTT URL:', mqtturl);
			console.log('🔧 连接选项:', options);
			
			client = mqtt.connect(mqtturl, options);
			initEventHandleMqtt(options.topic);
		}
	} catch (e) {
		console.error('❌ MQTT连接创建失败:', e);
	}
};

//建立连接  
const initEventHandleMqtt = (topicUrl) => {
    // 当连接成功时触发
	client.on("connect", function() {
		uni.hideLoading();
		console.log("✅ MQTT连接成功");
		//订阅主题
		client.subscribe(topicUrl, function(err) {
			if (err) {
				console.error("❌ MQTT订阅主题失败:", err);
			} else {
				console.log("✅ MQTT订阅主题成功:", topicUrl);
			}
		});
	});

	//如果mqttws订阅主题成功，那么这里就是当接收到自己订阅主题的处理逻辑
	client.on("message", function(topic, message) {
		try {
			console.log('📨 收到MQTT消息:');
			console.log('主题:', topic);
			console.log('消息内容:', message.toString());
			
			// 获取信息
			const mqttData = JSON.parse(message.toString());
			console.log('📋 解析后的数据:', mqttData);
			
			// 传递信息
			uni.$emit("mqttData", mqttData);
		} catch (error) {
			console.error('❌ 处理MQTT消息失败:', error);
			console.error('原始消息:', message.toString());
		}
	});

	// 当断开连接后，经过重连间隔时间重新自动连接到 Broker 时触发
	client.on('reconnect', function() {
		console.log('🔄 MQTT重新连接中...');
		uni.showLoading({
			title: "重新连接"
		});
	});

	// 当客户端无法成功连接时或发生解析错误时触发，参数 error 为错误信息
	client.on("error", function(err) {
		console.error('❌ MQTT连接错误:', err);
		uni.showToast({
			title: 'MQTT连接错误',
			icon: 'error',
			duration: 3000
		});
	});

	// 在收到 Broker 发送过来的断开连接的报文时触发
	client.on('disconnect', function() {
		console.log('⚠️ MQTT连接断开');
	});

	// 在断开连接以后触发
	client.on("close", function() {
		console.log('🔌 MQTT连接关闭');
	});

	// 当客户端下线时触发
	client.on("offline", function() {
		console.log('📴 MQTT客户端离线');
	});
};

//强制断开Mqtt
const closeMqtt = () => {
	if (client) {
		console.log('🔌 强制断开MQTT连接');
		client.end();
		client = null;
	}
};

// 使用pingResp心跳判断客户端和服务端是否还在连接着
const judgeBeat = () => {
	if (client && client.pingResp === false) {
		console.log('💔 MQTT心跳停止，准备重连');
		uni.showLoading({
			title: "心跳停止，等待重连..."
		});
		closeMqtt();
		createMqtt();
	}
};

// 获取连接状态
const getConnectionStatus = () => {
	return client && client.connected;
};

export {
	createMqtt,
	closeMqtt,
	judgeBeat,
	getConnectionStatus,
	client,
}