package main

import (
	"Dynamic_environmental_detection/business"
	"Dynamic_environmental_detection/connect"
	"Dynamic_environmental_detection/logger"
	"encoding/json"
	"flag"
	"log"
	"os"
	"os/signal"
	"strconv"
	"syscall"
	"time"
)

func main() {
	// 解析命令行参数
	debugMode := flag.Bool("debug", false, "Enable debug mode")
	slaveID := flag.String("slave", "2", "Slave address (debug mode only)")
	sensorType := flag.String("type", "1", "Sensor type 1-Temperature/Humidity, 2-Water Leak, 3-Smoke (debug mode only)")
	rawCommand := flag.String("cmd", "", "Raw Modbus command (hexadecimal, debug mode only)")
	flag.Parse()

	// 初始化日志
	if err := logger.InitLogger(); err != nil {
		log.Fatal("Failed to initialize logger:", err)
	}
	defer logger.Close()

	// 调试模式
	if *debugMode {
		runDebugMode(*slaveID, *sensorType, *rawCommand)
		return
	}

	// 正常模式
	runNormalMode()
}

// runDebugMode 运行调试模式
func runDebugMode(slaveID, sensorType, rawCommand string) {
	logger.Logger.Printf("=== Environmental Detection System Debug Mode ===")

	debugHandler := business.NewDebugHandler()

	if rawCommand != "" {
		// 原始命令模式
		if err := debugHandler.TestRawCommand(rawCommand); err != nil {
			logger.Logger.Printf("Debug failed: %v", err)
			os.Exit(1)
		}
	} else {
		// 设备测试模式
		if err := debugHandler.TestDevice(slaveID, sensorType); err != nil {
			logger.Logger.Printf("Debug failed: %v", err)
			os.Exit(1)
		}
	}
}

// setupGracefulShutdown 设置优雅关闭
func setupGracefulShutdown() {
	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)

	go func() {
		sig := <-sigChan
		logger.Logger.Printf("Received signal: %v, starting shutdown", sig)

		// 关闭 WebSocket 连接
		connect.Close()
		logger.Logger.Printf("WebSocket connection closed")

		logger.Logger.Printf("=== System exited ===")
		os.Exit(0)
	}()
}

// runNormalMode 运行正常模式
func runNormalMode() {
	logger.Logger.Printf("=== Environmental Detection System Starting ===")

	// 原有的正常模式代码...
	// 2. 初始化 WebSocket 连接
	logger.Logger.Printf("Initializing WebSocket connection...")
	if err := connect.InitWSChannel(); err != nil {
		log.Fatal("WebSocket connection initialization failed:", err)
	}

	// 3. 解析配置文件
	logger.Logger.Printf("Parsing sensor configuration file...")
	configs, err := business.ParseServiceConfig("/usr/local/etc/service.conf")
	if err != nil {
		log.Fatal("Configuration parsing failed:", err)
	}

	// 4. 验证配置
	if err := business.ValidateConfig(configs); err != nil {
		log.Fatal("Configuration validation failed:", err)
	}

	// 5. 注册服务
	logger.Logger.Printf("Registering service to server...")
	serviceID := connect.GenerateServiceID()
	metaData := map[string]interface{}{
		"version":      "1.0",
		"type":         "environment_detection",
		"sensor_count": len(configs),
		"description":  "Environmental Detection Service",
	}

	if err := connect.RegisterService(serviceID, metaData, "environment-detection-container"); err != nil {
		log.Fatal("Service registration failed:", err)
	}

	// 6. 创建业务管理器
	logger.Logger.Printf("Creating business manager...")
	businessManager, err := business.NewBusinessManager(configs)
	if err != nil {
		log.Fatal("Failed to create business manager:", err)
	}
	defer businessManager.Close()

	// 7. 订阅主题处理服务器消息
	logger.Logger.Printf("Subscribing to device updates topic...")
	if err := connect.SubscribeTopic("device_updates", handleDeviceUpdates); err != nil {
		log.Fatal("Topic subscription failed:", err)
	}
	logger.Logger.Printf("Subscribing to alert topic (/dthjjc/alert) for buzzer...")

	if err := connect.SubscribeTopic("/dthjjc/alert", handleAlertMessage); err != nil {
		logger.Logger.Printf("Failed to subscribe alert topic: %v (continue anyway)", err)
	} else {
		logger.Logger.Printf("Successfully subscribed to /dthjjc/alert → buzzer ready!")
	}

	// 8. 启动数据采集循环
	logger.Logger.Printf("Starting data collection loop...")
	go startDataCollectionLoop(businessManager)

	// 9. 设置优雅关闭
	setupGracefulShutdown()

	logger.Logger.Printf("=== System startup completed, beginning operation ===")

	// 永久运行
	select {}
}

// handleDeviceUpdates 处理设备更新消息
func handleDeviceUpdates(params *connect.PublishParams) {
	logger.Logger.Printf("Received device update message, topic: %s", params.Topic)

	var updateData map[string]interface{}
	if err := json.Unmarshal(params.Data, &updateData); err != nil {
		logger.Logger.Printf("Failed to parse device update message: %v", err)
		return
	}

	logger.Logger.Printf("Device update content: %+v", updateData)
}

// startDataCollectionLoop 启动数据采集循环
func startDataCollectionLoop(businessManager *business.BusinessManager) {

	collectionInterval := 20 * time.Second
	ticker := time.NewTicker(collectionInterval)
	defer ticker.Stop()
	logger.Logger.Printf("Data collection loop started, interval: %v", collectionInterval)

	for {
		select {
		case <-ticker.C:
			if err := businessManager.StartDataCollection(); err != nil {
				logger.Logger.Printf("Data collection failed: %v", err)
			}
		}
	}

}

func handleAlertMessage(params *connect.PublishParams) {
	payload := params.Content
	if len(payload) == 0 {
		payload = params.Data
	}
	if len(payload) == 0 {
		logger.Logger.Printf("平台告警空包 → 强制响 3 秒")
		business.TriggerBuzzer(3)
		return
	}

	raw := string(payload)
	logger.Logger.Printf("收到告警原始内容 → %s", raw)

	type Cmd struct {
		Type           int             `json:"type"`
		BuzzerDuration json.RawMessage `json:"buzzer_duration"` // 万能类型！
	}
	var cmd Cmd

	var outer string
	if json.Unmarshal(payload, &outer) == nil {
		logger.Logger.Printf("检测到外层是字符串 → %s", outer)
		raw = outer
	}

	if err := json.Unmarshal([]byte(raw), &cmd); err != nil {
		logger.Logger.Printf("最终解析失败: %v → 暴力识别", err)
	} else if cmd.Type == 1 {

		dur := 3
		var temp interface{}
		if json.Unmarshal(cmd.BuzzerDuration, &temp) == nil {
			switch v := temp.(type) {
			case string:
				if n, err := strconv.Atoi(v); err == nil {
					dur = n
				}
			case float64:
				dur = int(v)
			case int:
				dur = v
			}
		}
		if dur <= 0 {
			dur = 3
		}

		logger.Logger.Printf("平台告警解析成功 → 蜂鸣器响 %d 秒！！！", dur)
		business.TriggerBuzzer(dur)
		return
	}

	// 终极兜底：只要包含 type 和 1 就响
	//if strings.Contains(raw, "type") && strings.Contains(raw, "1") {
	//	logger.Logger.Printf("暴力识别告警指令 → 强制响 3 秒")
	//	business.TriggerBuzzer(3)
	//}
}