Exemplos de Recursos Mobile Web Go

// Web Go Device Information Examples
// Get device information using system calls and environment variables

package main

import (
	"fmt"
	"os"
	"os/exec"
	"runtime"
	"strings"
)

// 1. Basic Device Information

// DeviceInfo holds basic device information
type DeviceInfo struct {
	OS           string
	Architecture string
	Hostname     string
	CPUCount     int
	GoVersion    string
}

// GetDeviceInfo gets basic device information
func GetDeviceInfo() DeviceInfo {
	hostname, _ := os.Hostname()

	return DeviceInfo{
		OS:           runtime.GOOS,
		Architecture: runtime.GOARCH,
		Hostname:     hostname,
		CPUCount:     runtime.NumCPU(),
		GoVersion:    runtime.Version(),
	}
}

// PrintDeviceInfo prints device information
func PrintDeviceInfo(info DeviceInfo) {
	fmt.Println("=== Device Information ===")
	fmt.Printf("OS: %s\n", info.OS)
	fmt.Printf("Architecture: %s\n", info.Architecture)
	fmt.Printf("Hostname: %s\n", info.Hostname)
	fmt.Printf("CPU Count: %d\n", info.CPUCount)
	fmt.Printf("Go Version: %s\n", info.GoVersion)
}

// 2. OS-Specific Information

// GetOSVersion gets OS version (platform-specific)
func GetOSVersion() string {
	switch runtime.GOOS {
	case "windows":
		return getWindowsVersion()
	case "darwin":
		return getMacOSVersion()
	case "linux":
		return getLinuxVersion()
	default:
		return "Unknown OS"
	}
}

func getWindowsVersion() string {
	cmd := exec.Command("cmd", "ver")
	output, err := cmd.Output()
	if err != nil {
		return "Windows (version unknown)"
	}
	return strings.TrimSpace(string(output))
}

func getMacOSVersion() string {
	cmd := exec.Command("sw_vers", "-productVersion")
	output, err := cmd.Output()
	if err != nil {
		return "macOS (version unknown)"
	}
	return fmt.Sprintf("macOS %s", strings.TrimSpace(string(output)))
}

func getLinuxVersion() string {
	// Try /etc/os-release first
	cmd := exec.Command("sh", "-c", "cat /etc/os-release | grep PRETTY_NAME")
	output, err := cmd.Output()
	if err == nil {
		str := string(output)
		if strings.Contains(str, "PRETTY_NAME=") {
			parts := strings.Split(str, "=")
			if len(parts) > 1 {
				return strings.Trim(parts[1], ""\n")
			}
		}
	}

	// Fallback to uname
	cmd = exec.Command("uname", "-r")
	output, err = cmd.Output()
	if err != nil {
		return "Linux (version unknown)"
	}

	return fmt.Sprintf("Linux %s", strings.TrimSpace(string(output)))
}

// 3. Hardware Information

// MemoryInfo holds memory information
type MemoryInfo struct {
	Total     uint64
	Available uint64
	Used      uint64
	UsedPercent float64
}

// GetMemoryInfo gets memory information (platform-specific)
func GetMemoryInfo() MemoryInfo {
	switch runtime.GOOS {
	case "windows":
		return getWindowsMemoryInfo()
	case "darwin", "linux":
		return getUnixMemoryInfo()
	default:
		return MemoryInfo{}
	}
}

func getWindowsMemoryInfo() MemoryInfo {
	// Use wmic or GetPerformanceInfo
	cmd := exec.Command("wmic", "OS", "get", "TotalVisibleMemorySize,FreePhysicalMemory")
	output, err := cmd.Output()
	if err != nil {
		return MemoryInfo{}
	}

	// Parse output (simplified)
	lines := strings.Split(string(output), "\n")
	if len(lines) < 2 {
		return MemoryInfo{}
	}

	fields := strings.Fields(lines[1])
	if len(fields) < 2 {
		return MemoryInfo{}
	}

	// Values are in KB
	var total, available uint64
	fmt.Sscanf(fields[0], "%d", &total)
	fmt.Sscanf(fields[1], "%d", &available)

	total *= 1024        // Convert to bytes
	available *= 1024
	used := total - available

	return MemoryInfo{
		Total:     total,
		Available: available,
		Used:      used,
		UsedPercent: float64(used) / float64(total) * 100,
	}
}

func getUnixMemoryInfo() MemoryInfo {
	// Read from /proc/meminfo on Linux
	cmd := exec.Command("sh", "-c", "cat /proc/meminfo | grep -E 'MemTotal|MemAvailable'")
	output, err := cmd.Output()
	if err != nil {
		return MemoryInfo{}
	}

	lines := strings.Split(string(output), "\n")
	var total, available uint64

	for _, line := range lines {
		fields := strings.Fields(line)
		if len(fields) >= 2 {
			var value uint64
			fmt.Sscanf(fields[1], "%d", &value)
			value *= 1024 // Convert to bytes

			if strings.Contains(line, "MemTotal") {
				total = value
			} else if strings.Contains(line, "MemAvailable") {
				available = value
			}
		}
	}

	if total == 0 {
		return MemoryInfo{}
	}

	used := total - available

	return MemoryInfo{
		Total:     total,
		Available: available,
		Used:      used,
		UsedPercent: float64(used) / float64(total) * 100,
	}
}

// FormatMemorySize formats memory size in human-readable format
func FormatMemorySize(bytes uint64) string {
	const (
		KB = 1024
		MB = KB * 1024
		GB = MB * 1024
	)

	switch {
	case bytes >= GB:
		return fmt.Sprintf("%.2f GB", float64(bytes)/float64(GB))
	case bytes >= MB:
		return fmt.Sprintf("%.2f MB", float64(bytes)/float64(MB))
	case bytes >= KB:
		return fmt.Sprintf("%.2f KB", float64(bytes)/float64(KB))
	default:
		return fmt.Sprintf("%d B", bytes)
	}
}

// CPUInfo holds CPU information
type CPUInfo struct {
	Model     string
	Cores     int
	Frequency string
}

// GetCPUInfo gets CPU information
func GetCPUInfo() CPUInfo {
	info := CPUInfo{
		Cores: runtime.NumCPU(),
	}

	switch runtime.GOOS {
	case "windows":
		info.Model = getWindowsCPUModel()
	case "darwin":
		info.Model = getMacOSCPUModel()
	case "linux":
		info.Model = getLinuxCPUModel()
	}

	return info
}

func getWindowsCPUModel() string {
	cmd := exec.Command("wmic", "cpu", "get", "name")
	output, err := cmd.Output()
	if err != nil {
		return "Unknown CPU"
	}
	lines := strings.Split(string(output), "\n")
	if len(lines) > 1 {
		return strings.TrimSpace(lines[1])
	}
	return "Unknown CPU"
}

func getMacOSCPUModel() string {
	cmd := exec.Command("sysctl", "-n", "machdep.cpu.brand_string")
	output, err := cmd.Output()
	if err != nil {
		return "Unknown CPU"
	}
	return strings.TrimSpace(string(output))
}

func getLinuxCPUModel() string {
	cmd := exec.Command("sh", "-c", "cat /proc/cpuinfo | grep 'model name' | head -1")
	output, err := cmd.Output()
	if err != nil {
		return "Unknown CPU"
	}

	str := string(output)
	parts := strings.Split(str, ":")
	if len(parts) > 1 {
		return strings.TrimSpace(parts[1])
	}

	return "Unknown CPU"
}

// 4. Screen Information

// ScreenInfo holds screen/display information
type ScreenInfo struct {
	Width       int
	Height      int
	DPI         int
	Orientation string
}

// GetScreenInfo gets screen information
func GetScreenInfo() ScreenInfo {
	// This is platform-dependent and may require external libraries
	// For web applications, you'd use JavaScript's window.screen

	// Simulated values for demonstration
	return ScreenInfo{
		Width:       1920,
		Height:      1080,
		DPI:         96,
		Orientation: "landscape",
	}
}

// 5. Battery Information

// BatteryInfo holds battery information
type BatteryInfo struct {
	Level     int
	Charging  bool
	TimeRemaining string
}

// GetBatteryInfo gets battery information (platform-specific)
func GetBatteryInfo() BatteryInfo {
	switch runtime.GOOS {
	case "darwin":
		return getMacOSBatteryInfo()
	case "linux":
		return getLinuxBatteryInfo()
	default:
		return BatteryInfo{}
	}
}

func getMacOSBatteryInfo() BatteryInfo {
	cmd := exec.Command("pmset", "-g", "batt")
	output, err := cmd.Output()
	if err != nil {
		return BatteryInfo{}
	}

	str := string(output)
	info := BatteryInfo{}

	// Parse battery percentage
	if strings.Contains(str, "%") {
		parts := strings.Fields(str)
		for _, part := range parts {
			if strings.Contains(part, "%") {
				var percent int
				fmt.Sscanf(part, "%d", &percent)
				info.Level = percent
			}
		}
	}

	// Check if charging
	info.Charging = strings.Contains(str, "AC Power")

	return info
}

func getLinuxBatteryInfo() BatteryInfo {
	// Read from /sys/class/power_supply/BAT0/
	cmd := exec.Command("sh", "-c", "cat /sys/class/power_supply/BAT0/capacity")
	output, err := cmd.Output()
	if err != nil {
		return BatteryInfo{}
	}

	var level int
	fmt.Sscanf(strings.TrimSpace(string(output)), "%d", &level)

	cmd = exec.Command("sh", "-c", "cat /sys/class/power_supply/BAT0/status")
	statusOutput, _ := cmd.Output()

	return BatteryInfo{
		Level:    level,
		Charging: strings.Contains(string(statusOutput), "Charging"),
	}
}

// 6. Application Information

// AppInfo holds application information
type AppInfo struct {
	Name      string
	Version   string
	Build     string
	BuildDate string
	Author    string
}

// GetAppInfo gets application information
func GetAppInfo() AppInfo {
	// These would typically come from build flags or config
	return AppInfo{
		Name:      "My Go App",
		Version:   "1.0.0",
		Build:     "12345",
		BuildDate: "2025-12-30",
		Author:    "Your Name",
	}
}

// 7. Environment Information

// EnvironmentInfo holds environment information
type EnvironmentInfo struct {
	Variables map[string]string
	Path      string
	Home      string
	Terminal  string
}

// GetEnvironmentInfo gets environment information
func GetEnvironmentInfo() EnvironmentInfo {
	return EnvironmentInfo{
		Variables: getSelectedEnvVars(),
		Path:      os.Getenv("PATH"),
		Home:      os.Getenv("HOME"),
		Terminal:  os.Getenv("TERM"),
	}
}

func getSelectedEnvVars() map[string]string {
	selected := []string{
		"PATH", "HOME", "USER", "SHELL",
		"APPDATA", "PROGRAMFILES", "TEMP",
		"LANG", "LC_ALL",
	}

	result := make(map[string]string)
	for _, key := range selected {
		if value := os.Getenv(key); value != "" {
			result[key] = value
		}
	}

	return result
}

// 8. Device Identification

// DeviceID generates a unique device ID
func GetDeviceID() string {
	hostname, _ := os.Hostname()
	os := runtime.GOOS
	arch := runtime.GOARCH

	// Create a simple ID from available info
	return fmt.Sprintf("%s-%s-%s", hostname, os, arch)
}

// GetFingerprint creates device fingerprint
func GetDeviceFingerprint() string {
	info := GetDeviceInfo()
	cpuInfo := GetCPUInfo()

	return fmt.Sprintf("%s-%s-%d-%s",
		info.OS,
		info.Architecture,
		info.CPUCount,
		cpuInfo.Model,
	)
}

// Usage Examples
func main() {
	fmt.Println("=== Web Go Device Information Examples ===\n")

	// 1. Basic device info
	fmt.Println("--- 1. Basic Device Info ---")
	deviceInfo := GetDeviceInfo()
	PrintDeviceInfo(deviceInfo)

	// 2. OS version
	fmt.Println("\n--- 2. OS Version ---")
	osVersion := GetOSVersion()
	fmt.Printf("OS Version: %s\n", osVersion)

	// 3. CPU info
	fmt.Println("\n--- 3. CPU Information ---")
	cpuInfo := GetCPUInfo()
	fmt.Printf("CPU Model: %s\n", cpuInfo.Model)
	fmt.Printf("CPU Cores: %d\n", cpuInfo.Cores)

	// 4. Memory info
	fmt.Println("\n--- 4. Memory Information ---")
	memInfo := GetMemoryInfo()
	fmt.Printf("Total Memory: %s\n", FormatMemorySize(memInfo.Total))
	fmt.Printf("Available: %s\n", FormatMemorySize(memInfo.Available))
	fmt.Printf("Used: %s (%.1f%%)\n",
		FormatMemorySize(memInfo.Used),
		memInfo.UsedPercent)

	// 5. Screen info
	fmt.Println("\n--- 5. Screen Information ---")
	screenInfo := GetScreenInfo()
	fmt.Printf("Resolution: %dx%d\n", screenInfo.Width, screenInfo.Height)
	fmt.Printf("DPI: %d\n", screenInfo.DPI)
	fmt.Printf("Orientation: %s\n", screenInfo.Orientation)

	// 6. Battery info
	fmt.Println("\n--- 6. Battery Information ---")
	batteryInfo := GetBatteryInfo()
	if batteryInfo.Level > 0 {
		fmt.Printf("Battery Level: %d%%\n", batteryInfo.Level)
		fmt.Printf("Charging: %v\n", batteryInfo.Charging)
	} else {
		fmt.Println("Battery information not available")
	}

	// 7. App info
	fmt.Println("\n--- 7. Application Information ---")
	appInfo := GetAppInfo()
	fmt.Printf("App: %s v%s\n", appInfo.Name, appInfo.Version)
	fmt.Printf("Build: %s (%s)\n", appInfo.Build, appInfo.BuildDate)

	// 8. Device ID
	fmt.Println("\n--- 8. Device Identification ---")
	deviceID := GetDeviceID()
	fmt.Printf("Device ID: %s\n", deviceID)

	fingerprint := GetDeviceFingerprint()
	fmt.Printf("Fingerprint: %s\n", fingerprint)

	// 9. Environment
	fmt.Println("\n--- 9. Environment ---")
	envInfo := GetEnvironmentInfo()
	fmt.Printf("Home: %s\n", envInfo.Home)
	fmt.Printf("Terminal: %s\n", envInfo.Terminal)

	fmt.Println("\n=== All Device Information Examples Completed ===")
}

// Web Go Network Status Examples
// Check network connection status and type

package main

import (
	"fmt"
	"net"
	"os/exec"
	"runtime"
	"strings"
	"time"
)

// 1. Basic Network Status

// NetworkStatus holds network status information
type NetworkStatus struct {
	Connected   bool
	Type        string
	IP          string
	Gateway     string
	DNS         []string
	Latency     time.Duration
}

// GetNetworkStatus gets current network status
func GetNetworkStatus() NetworkStatus {
	status := NetworkStatus{
		Connected: false,
		Type:      "Unknown",
		DNS:       []string{},
	}

	// Check connectivity
	if isNetworkAvailable() {
		status.Connected = true
		status.Type = detectNetworkType()
		status.IP = getLocalIP()
		status.Gateway = getDefaultGateway()
		status.DNS = getDNSServers()
		status.Latency = measureLatency()
	}

	return status
}

// isNetworkAvailable checks if network is available
func isNetworkAvailable() bool {
	// Try to connect to a well-known server
	_, err := net.DialTimeout("tcp", "8.8.8.8:53", 2*time.Second)
	return err == nil
}

// detectNetworkType detects network connection type
func detectNetworkType() string {
	// This is platform-specific
	switch runtime.GOOS {
	case "darwin":
		return detectMacOSNetworkType()
	case "linux":
		return detectLinuxNetworkType()
	case "windows":
		return detectWindowsNetworkType()
	default:
		return "Ethernet"
	}
}

func detectMacOSNetworkType() string {
	cmd := exec.Command("networksetup", "-listallnetworkservices")
	output, _ := cmd.Output()

	str := string(output)
	if strings.Contains(str, "Wi-Fi") || strings.Contains(str, "AirPort") {
		return "Wi-Fi"
	}

	return "Ethernet"
}

func detectLinuxNetworkType() string {
	// Check wireless interfaces
	cmd := exec.Command("ls", "/sys/class/net")
	output, _ := cmd.Output()

	interfaces := strings.Split(string(output), "\n")
	for _, iface := range interfaces {
		if strings.HasPrefix(iface, "w") || strings.HasPrefix(iface, "wlan") {
			return "Wi-Fi"
		}
	}

	return "Ethernet"
}

func detectWindowsNetworkType() string {
	cmd := exec.Command("netsh", "interface", "show", "interface")
	output, _ := cmd.Output()

	str := string(output)
	if strings.Contains(str, "Wi-Fi") || strings.Contains(str, "Wireless") {
		return "Wi-Fi"
	}

	return "Ethernet"
}

// getLocalIP gets local IP address
func getLocalIP() string {
	conn, err := net.Dial("udp", "8.8.8.8:80")
	if err != nil {
		return "Unknown"
	}
	defer conn.Close()

	localAddr := conn.LocalAddr().(*net.UDPAddr)
	return localAddr.IP.String()
}

// getDefaultGateway gets default gateway
func getDefaultGateway() string {
	switch runtime.GOOS {
	case "darwin":
		cmd := exec.Command("netstat", "-nr")
		output, _ := cmd.Output()
		lines := strings.Split(string(output), "\n")
		for _, line := range lines {
			if strings.Contains(line, "default") {
				fields := strings.Fields(line)
				if len(fields) > 1 {
					return fields[1]
				}
			}
		}
	case "linux":
		cmd := exec.Command("ip", "route")
		output, _ := cmd.Output()
		lines := strings.Split(string(output), "\n")
		for _, line := range lines {
			if strings.HasPrefix(line, "default") {
				fields := strings.Fields(line)
				if len(fields) > 2 {
					return fields[2]
				}
			}
		}
	case "windows":
		cmd := exec.Command("route", "print", "0.0.0.0")
		output, _ := cmd.Output()
		lines := strings.Split(string(output), "\n")
		for _, line := range lines {
			if strings.Contains(line, "0.0.0.0") {
				fields := strings.Fields(line)
				if len(fields) > 2 {
					return fields[2]
				}
			}
		}
	}

	return "Unknown"
}

// getDNSServers gets DNS servers
func getDNSServers() []string {
	var dns []string

	switch runtime.GOOS {
	case "darwin":
		cmd := exec.Command("scutil", "--dns")
		output, _ := cmd.Output()
		lines := strings.Split(string(output), "\n")
		for _, line := range lines {
			if strings.Contains(line, "nameserver") {
				fields := strings.Fields(line)
				if len(fields) > 1 {
					dns = append(dns, fields[1])
				}
			}
		}
	case "linux":
		cmd := exec.Command("cat", "/etc/resolv.conf")
		output, _ := cmd.Output()
		lines := strings.Split(string(output), "\n")
		for _, line := range lines {
			if strings.HasPrefix(line, "nameserver") {
				fields := strings.Fields(line)
				if len(fields) > 1 {
					dns = append(dns, fields[1])
				}
			}
		}
	case "windows":
		cmd := exec.Command("nslookup", "localhost")
		output, _ := cmd.Output()
		lines := strings.Split(string(output), "\n")
		for _, line := range lines {
			if strings.Contains(line, "Server:") {
				fields := strings.Fields(line)
				if len(fields) > 1 {
					dns = append(dns, fields[1])
				}
			}
		}
	}

	return dns
}

// measureLatency measures network latency
func measureLatency() time.Duration {
	start := time.Now()

	conn, err := net.DialTimeout("tcp", "8.8.8.8:53", 5*time.Second)
	if err != nil {
		return 0
	}
	defer conn.Close()

	return time.Since(start)
}

// 2. Network Speed Test

// SpeedTestResult holds speed test results
type SpeedTestResult struct {
	DownloadSpeed float64 // Mbps
	UploadSpeed   float64 // Mbps
	Ping          time.Duration
}

// RunSpeedTest runs network speed test
func RunSpeedTest() SpeedTestResult {
	// Ping test
	ping := measureLatency()

	// Download speed (simplified - just measures time to download small file)
	downloadSpeed := measureDownloadSpeed()

	// Upload speed (simplified)
	uploadSpeed := measureUploadSpeed()

	return SpeedTestResult{
		DownloadSpeed: downloadSpeed,
		UploadSpeed:   uploadSpeed,
		Ping:          ping,
	}
}

func measureDownloadSpeed() float64 {
	// Simplified download speed test
	start := time.Now()

	// Download small test file
	// In real implementation, you'd download a larger file
	conn, err := net.DialTimeout("tcp", "example.com:80", 5*time.Second)
	if err != nil {
		return 0
	}
	defer conn.Close()

	elapsed := time.Since(start).Seconds()
	if elapsed == 0 {
		return 0
	}

	// Rough estimate (assuming ~1MB transfer)
	sizeMB := 1.0
	return sizeMB / elapsed
}

func measureUploadSpeed() float64 {
	// Simplified upload speed test
	start := time.Now()

	conn, err := net.DialTimeout("tcp", "example.com:80", 5*time.Second)
	if err != nil {
		return 0
	}
	defer conn.Close()

	// Write some data
	data := make([]byte, 1024*1024) // 1MB
	conn.Write(data)

	elapsed := time.Since(start).Seconds()
	if elapsed == 0 {
		return 0
	}

	sizeMB := 1.0
	return sizeMB / elapsed
}

// 3. Network Interface Information

// NetworkInterface holds interface information
type NetworkInterface struct {
	Name      string
	IP        string
	Netmask   string
	MAC       string
	Up        bool
	Type      string
}

// GetNetworkInterfaces gets all network interfaces
func GetNetworkInterfaces() []NetworkInterface {
	var interfaces []NetworkInterface

	ifaces, _ := net.Interfaces()

	for _, iface := range ifaces {
		addrs, _ := iface.Addrs()
		var ip string

		for _, addr := range addrs {
			if ipnet, ok := addr.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
				if ipnet.IP.To4() != nil {
					ip = ipnet.IP.String()
					break
				}
			}
		}

		ni := NetworkInterface{
			Name:    iface.Name,
			IP:      ip,
			MAC:     iface.HardwareAddr.String(),
			Up:      iface.Flags&net.FlagUp != 0,
		}

		// Detect interface type
		if strings.Contains(iface.Name, "w") || strings.Contains(iface.Name, "Wi-Fi") {
			ni.Type = "Wi-Fi"
		} else if strings.Contains(iface.Name, "eth") || strings.Contains(iface.Name, "en") {
			ni.Type = "Ethernet"
		} else {
			ni.Type = "Other"
		}

		interfaces = append(interfaces, ni)
	}

	return interfaces
}

// 4. Network Monitoring

// NetworkMonitor monitors network changes
type NetworkMonitor struct {
	callback func(NetworkStatus)
	stopChan chan bool
}

// NewNetworkMonitor creates network monitor
func NewNetworkMonitor(callback func(NetworkStatus)) *NetworkMonitor {
	return &NetworkMonitor{
		callback: callback,
		stopChan: make(chan bool),
	}
}

// Start starts monitoring network changes
func (nm *NetworkMonitor) Start(interval time.Duration) {
	ticker := time.NewTicker(interval)
	lastStatus := GetNetworkStatus()

	go func() {
		for {
			select {
			case <-ticker.C:
				currentStatus := GetNetworkStatus()

				// Check for changes
				if currentStatus.Connected != lastStatus.Connected ||
					currentStatus.Type != lastStatus.Type {
					nm.callback(currentStatus)
					lastStatus = currentStatus
				}
			case <-nm.stopChan:
				ticker.Stop()
				return
			}
		}
	}()
}

// Stop stops monitoring
func (nm *NetworkMonitor) Stop() {
	nm.stopChan <- true
}

// 5. Connectivity Check

// CheckConnectivity checks connectivity to specific host
func CheckConnectivity(host string, port int, timeout time.Duration) bool {
	address := fmt.Sprintf("%s:%d", host, port)
	conn, err := net.DialTimeout("tcp", address, timeout)
	if err != nil {
		return false
	}
	conn.Close()
	return true
}

// CheckMultipleHosts checks connectivity to multiple hosts
func CheckMultipleHosts(hosts []string, timeout time.Duration) map[string]bool {
	results := make(map[string]bool)

	for _, host := range hosts {
		results[host] = CheckConnectivity(host, 80, timeout)
	}

	return results
}

// 6. Network Statistics

// NetworkStats holds network statistics
type NetworkStats struct {
	BytesSent     uint64
	BytesReceived uint64
	PacketsSent     uint64
	PacketsReceived uint64
}

// GetNetworkStats gets network statistics (platform-specific)
func GetNetworkStats() NetworkStats {
	// Platform-specific implementation
	// This would typically read from /proc/net/dev on Linux
	// or use performance counters on Windows

	return NetworkStats{}
}

// Usage Examples
func main() {
	fmt.Println("=== Web Go Network Status Examples ===\n")

	// 1. Network status
	fmt.Println("--- 1. Network Status ---")
	status := GetNetworkStatus()
	fmt.Printf("Connected: %v\n", status.Connected)
	fmt.Printf("Type: %s\n", status.Type)
	fmt.Printf("IP: %s\n", status.IP)
	fmt.Printf("Gateway: %s\n", status.Gateway)
	fmt.Printf("DNS: %v\n", status.DNS)
	fmt.Printf("Latency: %v\n", status.Latency)

	// 2. Network interfaces
	fmt.Println("\n--- 2. Network Interfaces ---")
	interfaces := GetNetworkInterfaces()
	for _, iface := range interfaces {
		if iface.Up && iface.IP != "" {
			fmt.Printf("Interface: %s (%s)\n", iface.Name, iface.Type)
			fmt.Printf("  IP: %s\n", iface.IP)
			fmt.Printf("  MAC: %s\n", iface.MAC)
		}
	}

	// 3. Speed test
	fmt.Println("\n--- 3. Speed Test ---")
	speedTest := RunSpeedTest()
	fmt.Printf("Download: %.2f Mbps\n", speedTest.DownloadSpeed)
	fmt.Printf("Upload: %.2f Mbps\n", speedTest.UploadSpeed)
	fmt.Printf("Ping: %v\n", speedTest.Ping)

	// 4. Connectivity check
	fmt.Println("\n--- 4. Connectivity Check ---")
	hosts := []string{"google.com", "github.com", "example.com"}
	results := CheckMultipleHosts(hosts, 2*time.Second)
	for host, connected := range results {
		status := "✓"
		if !connected {
			status = "✗"
		}
		fmt.Printf("%s %s: %v\n", status, host, connected)
	}

	// 5. Network monitoring
	fmt.Println("\n--- 5. Network Monitoring ---")
	monitor := NewNetworkMonitor(func(status NetworkStatus) {
		fmt.Printf("Network changed: Connected=%v, Type=%s\n",
			status.Connected, status.Type)
	})

	fmt.Println("Monitoring network for 10 seconds...")
	monitor.Start(2 * time.Second)
	time.Sleep(10 * time.Second)
	monitor.Stop()

	fmt.Println("\n=== All Network Status Examples Completed ===")
}

// Web Go Vibration Examples
// Control device vibration (platform-specific, limited support)

package main

import (
	"fmt"
	"os/exec"
	"runtime"
	"time"
)

// 1. Basic Vibration

// Vibrate vibrates the device for specified duration
func Vibrate(duration time.Duration) error {
	switch runtime.GOOS {
	case "darwin":
		return vibrateMacOS(duration)
	case "linux":
		return vibrateLinux(duration)
	case "windows":
		return vibrateWindows(duration)
	case "android":
		return vibrateAndroid(duration)
	default:
		return fmt.Errorf("vibration not supported on %s", runtime.GOOS)
	}
}

// vibrateMacOS vibrates on macOS (limited support)
func vibrateMacOS(duration time.Duration) error {
	// macOS has limited vibration support
	// Can use haptic feedback on trackpads or external devices
	cmd := exec.Command("osascript", "-e",
		`beep 1`)
	return cmd.Run()
}

// vibrateLinux vibrates on Linux
func vibrateLinux(duration time.Duration) error {
	// Check if vibration is available
	if !hasVibrationSupport() {
		return fmt.Errorf("vibration not available")
	}

	// Try using systemd-inhibit or other tools
	// This is highly distribution-specific
	cmd := exec.Command("notify-send", "-t",
		fmt.Sprintf("%d", duration.Milliseconds()),
		"Vibration", "Device vibrating")
	return cmd.Run()
}

// vibrateWindows vibrates on Windows
func vibrateWindows(duration time.Duration) error {
	// Windows doesn't have native vibration support
	// Could use Xbox controller vibration or external APIs
	return fmt.Errorf("vibration not supported on Windows")
}

// vibrateAndroid vibrates on Android
func vibrateAndroid(duration time.Duration) error {
	// Would use JNI to call Android Vibrator API
	// This requires Go Mobile or gomobile bindings
	cmd := exec.Command("sh", "-c",
		fmt.Sprintf("echo vibrate %d > /sys/class/timed_output/vibrator/enable",
			duration.Milliseconds()))
	return cmd.Run()
}

// hasVibrationSupport checks if vibration is available
func hasVibrationSupport() bool {
	// Check for vibration device
	_, err := exec.Command("ls", "/sys/class/timed_output/vibrator").Output()
	return err == nil
}

// 2. Vibration Patterns

// VibrationPattern defines a vibration pattern
type VibrationPattern struct {
	Durations []time.Duration
}

// NewVibrationPattern creates new vibration pattern
func NewVibrationPattern(durations ...time.Duration) VibrationPattern {
	return VibrationPattern{
		Durations: durations,
	}
}

// Play plays the vibration pattern
func (vp VibrationPattern) Play() error {
	for _, duration := range vp.Durations {
		if err := Vibrate(duration); err != nil {
			return err
		}
		time.Sleep(duration)
	}
	return nil
}

// Common vibration patterns
var (
	// PatternTap short tap vibration
	PatternTap = VibrationPattern{
		Durations: []time.Duration{50 * time.Millisecond},
	}

	// PatternDoubleTap double tap vibration
	PatternDoubleTap = VibrationPattern{
		Durations: []time.Duration{
			50 * time.Millisecond,
			100 * time.Millisecond,
			50 * time.Millisecond,
		},
	}

	// PatternSuccess success notification pattern
	PatternSuccess = VibrationPattern{
		Durations: []time.Duration{
			100 * time.Millisecond,
			50 * time.Millisecond,
			100 * time.Millisecond,
		},
	}

	// PatternError error notification pattern
	PatternError = VibrationPattern{
		Durations: []time.Duration{
			200 * time.Millisecond,
			100 * time.Millisecond,
			200 * time.Millisecond,
			100 * time.Millisecond,
			200 * time.Millisecond,
		},
	}

	// PatternNotification notification pattern
	PatternNotification = VibrationPattern{
		Durations: []time.Duration{
			100 * time.Millisecond,
			50 * time.Millisecond,
			100 * time.Millisecond,
			50 * time.Millisecond,
			100 * time.Millisecond,
		},
	}
)

// 3. Haptic Feedback

// HapticType defines type of haptic feedback
type HapticType int

const (
	HapticImpactLight HapticType = iota
	HapticImpactMedium
	HapticImpactHeavy
	HapticNotificationSuccess
	HapticNotificationWarning
	HapticNotificationError
	HapticSelection
)

// HapticFeedback performs haptic feedback
func HapticFeedback(feedbackType HapticType) error {
	switch feedbackType {
	case HapticImpactLight:
		return Vibrate(10 * time.Millisecond)
	case HapticImpactMedium:
		return Vibrate(25 * time.Millisecond)
	case HapticImpactHeavy:
		return Vibrate(50 * time.Millisecond)
	case HapticNotificationSuccess:
		return PatternSuccess.Play()
	case HapticNotificationWarning:
		return Vibrate(100 * time.Millisecond)
	case HapticNotificationError:
		return PatternError.Play()
	case HapticSelection:
		return Vibrate(15 * time.Millisecond)
	default:
		return fmt.Errorf("unknown haptic type")
	}
}

// 4. Vibration Manager

// VibrationManager manages vibration operations
type VibrationManager struct {
	enabled   bool
	intensity float64 // 0.0 to 1.0
	current   time.Duration
}

// NewVibrationManager creates vibration manager
func NewVibrationManager() *VibrationManager {
	return &VibrationManager{
		enabled:   true,
		intensity: 1.0,
	}
}

// SetEnabled enables or disables vibration
func (vm *VibrationManager) SetEnabled(enabled bool) {
	vm.enabled = enabled
}

// SetIntensity sets vibration intensity
func (vm *VibrationManager) SetIntensity(intensity float64) {
	vm.intensity = intensity
}

// Vibrate vibrates with manager settings
func (vm *VibrationManager) Vibrate(duration time.Duration) error {
	if !vm.enabled {
		return nil
	}

	// Adjust duration by intensity
	adjusted := time.Duration(float64(duration) * vm.intensity)
	return Vibrate(adjusted)
}

// VibratePattern vibrates pattern with manager settings
func (vm *VibrationManager) VibratePattern(pattern VibrationPattern) error {
	for _, duration := range pattern.Durations {
		if err := vm.Vibrate(duration); err != nil {
			return err
		}
		time.Sleep(duration)
	}
	return nil
}

// IsEnabled returns if vibration is enabled
func (vm *VibrationManager) IsEnabled() bool {
	return vm.enabled
}

// GetIntensity returns current intensity
func (vm *VibrationManager) GetIntensity() float64 {
	return vm.intensity
}

// 5. Vibration with Fallback

// VibrateWithFallback vibrates with visual fallback
func VibrateWithFallback(duration time.Duration, fallback func()) {
	if err := Vibrate(duration); err != nil {
		// Fallback to visual feedback
		if fallback != nil {
			fallback()
		}
	}
}

// 6. Feedback Combinations

// FeedbackType defines type of feedback
type FeedbackType int

const (
	VisualFeedback FeedbackType = iota
	HapticOnlyFeedback
	AudioFeedback
	CombinedFeedback
)

// Feedback provides combined feedback
func Feedback(feedbackType FeedbackType, message string) {
	switch feedbackType {
	case VisualFeedback:
		fmt.Printf("[VISUAL] %s\n", message)
	case HapticOnlyFeedback:
		PatternTap.Play()
	case AudioFeedback:
		// Play sound
		fmt.Printf("[AUDIO] %s\n", message)
	case CombinedFeedback:
		fmt.Printf("[COMBINED] %s\n", message)
		PatternTap.Play()
	}
}

// 7. Context-Aware Vibration

// VibrationContext defines vibration context
type VibrationContext struct {
	IsSilent   bool
	IsImportant bool
	UserPreference string
}

// ContextualVibrate vibrates based on context
func ContextualVibrate(context VibrationContext, pattern VibrationPattern) error {
	// Check if should vibrate
	if context.IsSilent && !context.IsImportant {
		return nil // Don't vibrate in silent mode unless important
	}

	// Respect user preference
	switch context.UserPreference {
	case "always":
		return pattern.Play()
	case "never":
		return nil
	case "important_only":
		if context.IsImportant {
			return pattern.Play()
		}
		return nil
	default:
		return pattern.Play()
	}
}

// 8. Vibration Scheduler

// VibrationScheduler schedules vibrations
type VibrationScheduler struct {
	queues []VibrationTask
}

// VibrationTask represents a scheduled vibration
type VibrationTask struct {
	Pattern VibrationPattern
	Delay   time.Duration
}

// NewVibrationScheduler creates vibration scheduler
func NewVibrationScheduler() *VibrationScheduler {
	return &VibrationScheduler{
		queues: []VibrationTask{},
	}
}

// Schedule schedules a vibration
func (vs *VibrationScheduler) Schedule(pattern VibrationPattern, delay time.Duration) {
	vs.queues = append(vs.queues, VibrationTask{
		Pattern: pattern,
		Delay:   delay,
	})
}

// Run executes scheduled vibrations
func (vs *VibrationScheduler) Run() {
	for _, task := range vs.queues {
		time.Sleep(task.Delay)
		task.Pattern.Play()
	}
	vs.queues = []VibrationTask{}
}

// Usage Examples
func main() {
	fmt.Println("=== Web Go Vibration Examples ===\n")

	// 1. Basic vibration
	fmt.Println("--- 1. Basic Vibration ---")
	err := Vibrate(100 * time.Millisecond)
	if err != nil {
		fmt.Printf("Vibration error: %v\n", err)
		fmt.Println("(Vibration may not be supported on this platform)")
	}

	// 2. Vibration patterns
	fmt.Println("\n--- 2. Vibration Patterns ---")
	fmt.Println("Playing tap pattern...")
	PatternTap.Play()

	time.Sleep(500 * time.Millisecond)

	fmt.Println("Playing double tap pattern...")
	PatternDoubleTap.Play()

	time.Sleep(500 * time.Millisecond)

	fmt.Println("Playing success pattern...")
	PatternSuccess.Play()

	// 3. Haptic feedback
	fmt.Println("\n--- 3. Haptic Feedback ---")
	HapticFeedback(HapticImpactLight)
	time.Sleep(200 * time.Millisecond)
	HapticFeedback(HapticImpactMedium)
	time.Sleep(200 * time.Millisecond)
	HapticFeedback(HapticImpactHeavy)

	// 4. Vibration manager
	fmt.Println("\n--- 4. Vibration Manager ---")
	manager := NewVibrationManager()
	manager.SetIntensity(0.5) // 50% intensity

	fmt.Printf("Vibration enabled: %v\n", manager.IsEnabled())
	fmt.Printf("Intensity: %.0f%%\n", manager.GetIntensity()*100)

	manager.Vibrate(200 * time.Millisecond)

	// 5. Context-aware vibration
	fmt.Println("\n--- 5. Context-Aware Vibration ---")
	context := VibrationContext{
		IsSilent:    false,
		IsImportant: true,
		UserPreference: "always",
	}

	ContextualVibrate(context, PatternNotification)

	// 6. Scheduled vibrations
	fmt.Println("\n--- 6. Scheduled Vibrations ---")
	scheduler := NewVibrationScheduler()
	scheduler.Schedule(PatternTap, 0)
	scheduler.Schedule(PatternDoubleTap, 500*time.Millisecond)
	scheduler.Schedule(PatternSuccess, 1000*time.Millisecond)

	go scheduler.Run()
	time.Sleep(2 * time.Second) // Wait for all vibrations

	// 7. Fallback
	fmt.Println("\n--- 7. Vibration with Fallback ---")
	VibrateWithFallback(100*time.Millisecond, func() {
		fmt.Println("[FALLBACK] Visual feedback instead of vibration")
	})

	// 8. Combined feedback
	fmt.Println("\n--- 8. Combined Feedback ---")
	Feedback(CombinedFeedback, "Operation successful")

	fmt.Println("\n=== All Vibration Examples Completed ===")
	fmt.Println("Note: Vibration support is platform-specific and limited")
	fmt.Println("For mobile development, use Go Mobile (gomobile) or platform-specific APIs")
}