package connect

import (
	"FireLeave_tool/logger"
	"encoding/json"
	"fmt"
	"os"
	"path/filepath"
	"strings"
)

// Modified device data storage path
var (
	devicesBaseDir = "/data/devices"
	deviceDataList []DeviceData
)

// InitializeDevicesFromServiceConfig Initialize device data from service configuration
func InitializeDevicesFromServiceConfig() ([]DeviceData, error) {
	deviceDataMutex.Lock()
	defer deviceDataMutex.Unlock()

	logger.Logger.Printf("Initializing device data from service configuration...")

	// Ensure device directory exists
	if err := os.MkdirAll(devicesBaseDir, 0755); err != nil {
		logger.Logger.Printf("Failed to create device directory: %v", err)
		return nil, err
	}
	logger.Logger.Printf("Device directory confirmed: %s", devicesBaseDir)

	// Load from service configuration
	configs, err := LoadServiceConfig()
	if err != nil {
		logger.Logger.Printf("Failed to load from service configuration: %v", err)
		return nil, err
	}

	logger.Logger.Printf("Loaded %d devices from service configuration", len(configs))

	// Clear existing device data
	deviceDataList = []DeviceData{}

	// Process each device and save to individual files
	for i, config := range configs {
		processedData := ProcessDeviceDataForInference(config)
		deviceDataList = append(deviceDataList, processedData)

		// Save to individual device file
		if err := saveDeviceToFile(processedData); err != nil {
			logger.Logger.Printf("Failed to save the device file [%s]: %v", processedData.DeviceUUID, err)
			continue
		}
		logger.Logger.Printf("Processed device [%d]: UUID=%s", i, processedData.DeviceUUID)
	}

	logger.Logger.Printf("Device data initialization completed, %d devices", len(deviceDataList))
	return deviceDataList, nil
}

// saveDeviceToFile Save individual device data to separate file
func saveDeviceToFile(deviceData DeviceData) error {
	filePath := filepath.Join(devicesBaseDir, fmt.Sprintf("device_%s.json", deviceData.DeviceUUID))

	// Clean device data to ensure no invalid characters
	cleanedData := cleanDeviceData(deviceData)

	data, err := json.MarshalIndent(cleanedData, "", "  ")
	if err != nil {
		logger.Logger.Printf("Device data serialization failed: %v, Device data: %+v", err, cleanedData)
		return fmt.Errorf("Device data serialization failed: %v", err)
	}

	// Write directly to file
	if err := os.WriteFile(filePath, data, 0644); err != nil {
		return fmt.Errorf("Failed to write device file: %v", err)
	}

	logger.Logger.Printf("Device data saved successfully: %s", filePath)
	return nil
}

// cleanDeviceData Clean device data, remove possible invalid characters
func cleanDeviceData(data DeviceData) DeviceData {
	cleaned := data

	// Clean string fields
	cleaned.DeviceUUID = cleanString(data.DeviceUUID)
	cleaned.TaskID = cleanString(data.TaskID)
	cleaned.CameraRTSP = cleanString(data.CameraRTSP)
	cleaned.CameraIP = cleanString(data.CameraIP)
	cleaned.UploadURL = cleanString(data.UploadURL)
	cleaned.DetectAreaStr = cleanString(data.DetectAreaStr)

	// Ensure numeric fields are valid
	if cleaned.Confidence < 0 || cleaned.Confidence > 100 {
		cleaned.Confidence = 70 // Default value
	}
	if cleaned.CameraChannel < 0 {
		cleaned.CameraChannel = 0
	}
	if cleaned.PersonCount < 0 {
		cleaned.PersonCount = 0
	}
	if cleaned.Temperature < 0 {
		cleaned.Temperature = 0
	}
	if cleaned.TemperatureThreshold <= 0 {
		cleaned.TemperatureThreshold = 45.0 // Default value
	}

	return cleaned
}

func cleanString(s string) string {
	// Remove control characters and invalid Unicode characters
	return strings.Map(func(r rune) rune {
		if r == 0xFFFD { // Unicode replacement character
			return -1
		}
		if r < 32 && r != 9 && r != 10 && r != 13 { // Keep tab, newline, carriage return
			return -1
		}
		return r
	}, s)
}

// GetDeviceDataList Get device data list
func GetDeviceDataList() []DeviceData {
	deviceDataMutex.Lock()
	defer deviceDataMutex.Unlock()

	// If no data in memory, try to load from device files
	if len(deviceDataList) == 0 {
		logger.Logger.Printf("No device data in memory, loading from device files...")
		if err := loadDevicesFromFiles(); err != nil {
			logger.Logger.Printf("Failed to load from device files: %v", err)
			return []DeviceData{}
		}
	}

	// Return copy
	result := make([]DeviceData, len(deviceDataList))
	copy(result, deviceDataList)
	return result
}

// loadDevicesFromFiles Load data from device files
func loadDevicesFromFiles() error {
	// Clear existing data
	deviceDataList = []DeviceData{}

	// Read all files in device directory
	files, err := filepath.Glob(filepath.Join(devicesBaseDir, "device_*.json"))
	if err != nil {
		return fmt.Errorf("Failed to find device files: %v", err)
	}

	logger.Logger.Printf("Found %d device files", len(files))

	for _, file := range files {
		data, err := os.ReadFile(file)
		if err != nil {
			logger.Logger.Printf("Failed to read device file %s: %v", file, err)
			continue
		}

		var deviceData DeviceData
		if err := json.Unmarshal(data, &deviceData); err != nil {
			logger.Logger.Printf("Failed to parse device file %s: %v", file, err)
			continue
		}

		deviceDataList = append(deviceDataList, deviceData)
		logger.Logger.Printf("Loaded device from file: UUID=%s", deviceData.DeviceUUID)
	}

	logger.Logger.Printf("Loaded %d devices from device files", len(deviceDataList))
	return nil
}

// UpdateDeviceData Update device data
func UpdateDeviceData(data DeviceData) error {
	deviceDataMutex.Lock()
	defer deviceDataMutex.Unlock()

	//logger.Logger.Printf("Updating device data [%s]", data.DeviceUUID)

	// Clean input data
	cleanedData := cleanDeviceData(data)

	// Find if device with same DeviceUUID already exists
	found := false
	for i, existing := range deviceDataList {
		if existing.DeviceUUID == cleanedData.DeviceUUID {
			deviceDataList[i] = cleanedData
			found = true
			//logger.Logger.Printf("Updated existing device: DeviceUUID=%s", cleanedData.DeviceUUID)
			break
		}
	}

	// If not exists, add to list
	if !found {
		logger.Logger.Printf("Adding new device to list: DeviceUUID=%s", cleanedData.DeviceUUID)
		deviceDataList = append(deviceDataList, cleanedData)
	}

	// Save to individual file
	if err := saveDeviceToFile(cleanedData); err != nil {
		logger.Logger.Printf("Failed to save device file: %v", err)
		return err
	}

	logger.Logger.Printf("Device data update completed: DeviceUUID=%s", cleanedData.DeviceUUID)
	return nil
}