Service Management

class AppiumService:
    def __init__(self):
        """Initialize Appium service instance."""
    
    def start(self, **kwargs):
        """
        Start Appium server with specified options.
        
        Args:
            **kwargs: Server startup options
                timeout (int): Startup timeout in seconds
                args (list): Additional command line arguments
                env (dict): Environment variables
                stdout (file): Stdout redirection
                stderr (file): Stderr redirection
        
        Raises:
            AppiumServiceError: If service fails to start
        """
    
    def stop(self, timeout: int = None):
        """
        Stop running Appium server.
        
        Args:
            timeout (int, optional): Shutdown timeout in seconds
        
        Raises:
            AppiumServiceError: If service fails to stop cleanly
        """
    
    @property
    def is_running(self) -> bool:
        """
        Check if Appium service is currently running.
        
        Returns:
            bool: True if service is running, False otherwise
        """
    
    @property
    def is_listening(self) -> bool:
        """
        Check if service is listening on configured port.
        
        Returns:
            bool: True if service is accepting connections, False otherwise
        """

def is_service_listening(url: str, timeout: int = None, custom_validator = None) -> bool:
    """
    Check if service is listening at specified URL.
    
    Args:
        url (str): Service URL to check
        timeout (int, optional): Connection timeout in seconds
        custom_validator (callable, optional): Custom validation function
    
    Returns:
        bool: True if service is listening and responsive
    """

def find_executable(executable: str) -> str:
    """
    Find executable in system PATH.
    
    Args:
        executable (str): Executable name to find
    
    Returns:
        str: Full path to executable
    
    Raises:
        FileNotFoundError: If executable not found in PATH
    """

def get_node() -> str:
    """
    Get Node.js executable path.
    
    Returns:
        str: Path to node executable
    
    Raises:
        FileNotFoundError: If Node.js not found
    """

def get_npm() -> str:
    """
    Get NPM executable path.
    
    Returns:
        str: Path to npm executable
    
    Raises:
        FileNotFoundError: If NPM not found
    """

class AppiumServiceError(Exception):
    """General Appium service error."""
    pass

class AppiumStartupError(AppiumServiceError):
    """Exception raised when Appium service fails to start."""
    pass

from appium.webdriver.appium_service import AppiumService
from appium import webdriver
from appium.options.android import UiAutomator2Options
import time

# Create and configure service
service = AppiumService()

try:
    # Start Appium server
    print("Starting Appium service...")
    service.start()
    
    # Wait for service to be ready
    timeout = 30
    start_time = time.time()
    
    while not service.is_listening and (time.time() - start_time) < timeout:
        time.sleep(1)
    
    if service.is_listening:
        print("Appium service is ready")
        
        # Create WebDriver session
        options = UiAutomator2Options()
        options.platform_name = "Android"
        options.device_name = "Android Emulator"
        
        driver = webdriver.Remote("http://localhost:4723", options=options)
        
        # Run tests
        perform_tests(driver)
        
        # Clean up
        driver.quit()
    else:
        print("Service failed to start within timeout")
        
except Exception as e:
    print(f"Error during testing: {e}")
    
finally:
    # Always stop service
    if service.is_running:
        print("Stopping Appium service...")
        service.stop()

def perform_tests(driver):
    """Placeholder for test logic."""
    pass

import subprocess
import os

# Start service with custom configuration
def start_appium_with_config():
    service = AppiumService()
    
    # Custom environment variables
    env = os.environ.copy()
    env['APPIUM_LOG_LEVEL'] = 'debug'
    env['ANDROID_HOME'] = '/path/to/android/sdk'
    
    # Custom command line arguments
    args = [
        '--port', '4724',
        '--session-override',
        '--relaxed-security',
        '--log-timestamp',
        '--log', '/tmp/appium.log'
    ]
    
    # Start with custom configuration
    service.start(
        args=args,
        env=env,
        timeout=60
    )
    
    return service

# Usage
service = start_appium_with_config()

if service.is_listening:
    print("Custom Appium service started successfully")
    # Use service with WebDriver at http://localhost:4724
else:
    print("Failed to start custom service")

from appium.webdriver.appium_service import is_service_listening, find_executable

# Check if Appium server is already running
def check_existing_service():
    urls_to_check = [
        "http://localhost:4723",
        "http://localhost:4724", 
        "http://127.0.0.1:4723"
    ]
    
    for url in urls_to_check:
        if is_service_listening(url, timeout=5):
            print(f"Found running Appium service at {url}")
            return url
    
    print("No running Appium service found")
    return None

# Find required executables
def check_prerequisites():
    """Check if required tools are available."""
    try:
        node_path = find_executable("node")
        print(f"Node.js found at: {node_path}")
        
        npm_path = find_executable("npm")
        print(f"NPM found at: {npm_path}")
        
        appium_path = find_executable("appium")
        print(f"Appium found at: {appium_path}")
        
        return True
    except FileNotFoundError as e:
        print(f"Missing prerequisite: {e}")
        return False

# Custom service validator
def custom_validator(response):
    """Custom validation for service health."""
    if response.status_code == 200:
        data = response.json()
        return data.get('status') == 0  # Appium returns status 0 for success
    return False

# Check service with custom validation
def validate_service_health(url):
    return is_service_listening(
        url, 
        timeout=10, 
        custom_validator=custom_validator
    )

# Usage
if check_prerequisites():
    existing_service = check_existing_service()
    if existing_service:
        if validate_service_health(existing_service):
            print("Service is healthy and ready")
        else:
            print("Service is running but not healthy")

class MultiServiceManager:
    """Manage multiple Appium services for parallel testing."""
    
    def __init__(self):
        self.services = {}
    
    def start_service(self, name, port, **kwargs):
        """Start named service on specific port."""
        service = AppiumService()
        
        args = kwargs.get('args', [])
        args.extend(['--port', str(port)])
        kwargs['args'] = args
        
        try:
            service.start(**kwargs)
            
            # Wait for service to be ready
            service_url = f"http://localhost:{port}"
            if self._wait_for_service(service_url):
                self.services[name] = {
                    'service': service,
                    'port': port,
                    'url': service_url
                }
                print(f"Service '{name}' started on port {port}")
                return True
            else:
                service.stop()
                return False
                
        except Exception as e:
            print(f"Failed to start service '{name}': {e}")
            return False
    
    def stop_service(self, name):
        """Stop named service."""
        if name in self.services:
            service_info = self.services[name]
            service_info['service'].stop()
            del self.services[name]
            print(f"Service '{name}' stopped")
    
    def stop_all(self):
        """Stop all managed services."""
        for name in list(self.services.keys()):
            self.stop_service(name)
    
    def get_service_url(self, name):
        """Get URL for named service."""
        return self.services.get(name, {}).get('url')
    
    def _wait_for_service(self, url, timeout=30):
        """Wait for service to be ready."""
        import time
        start_time = time.time()
        
        while (time.time() - start_time) < timeout:
            if is_service_listening(url, timeout=2):
                return True
            time.sleep(1)
        
        return False

# Usage example
manager = MultiServiceManager()

try:
    # Start services for parallel testing
    manager.start_service("android_service", 4723)
    manager.start_service("ios_service", 4724)
    
    # Run parallel tests
    android_url = manager.get_service_url("android_service")
    ios_url = manager.get_service_url("ios_service")
    
    if android_url and ios_url:
        # Create drivers for both platforms
        android_driver = create_android_driver(android_url)
        ios_driver = create_ios_driver(ios_url)
        
        # Run tests in parallel
        run_parallel_tests(android_driver, ios_driver)
        
        # Clean up drivers
        android_driver.quit()
        ios_driver.quit()

finally:
    # Stop all services
    manager.stop_all()

from appium.webdriver.appium_service import AppiumServiceError, AppiumStartupError
import time

def robust_service_start(max_retries=3, base_port=4723):
    """Start Appium service with retry logic and port selection."""
    
    for attempt in range(max_retries):
        port = base_port + attempt
        service = AppiumService()
        
        try:
            print(f"Attempt {attempt + 1}: Starting service on port {port}")
            
            args = ['--port', str(port), '--session-override']
            service.start(args=args, timeout=60)
            
            # Verify service is responding
            service_url = f"http://localhost:{port}"
            if wait_for_service_ready(service_url, timeout=30):
                print(f"Service successfully started on port {port}")
                return service, service_url
            else:
                print(f"Service started but not responding on port {port}")
                service.stop()
                
        except AppiumStartupError as e:
            print(f"Startup failed on port {port}: {e}")
            try:
                service.stop()
            except:
                pass
                
        except Exception as e:
            print(f"Unexpected error on port {port}: {e}")
            try:
                service.stop()
            except:
                pass
        
        # Wait before next attempt
        if attempt < max_retries - 1:
            time.sleep(5)
    
    raise AppiumServiceError(f"Failed to start service after {max_retries} attempts")

def wait_for_service_ready(url, timeout=30):
    """Wait for service to be ready with health check."""
    start_time = time.time()
    
    while (time.time() - start_time) < timeout:
        try:
            if is_service_listening(url, timeout=5):
                # Additional health check
                response = requests.get(f"{url}/status", timeout=5)
                if response.status_code == 200:
                    return True
        except:
            pass
        
        time.sleep(2)
    
    return False

# Usage with error handling
try:
    service, service_url = robust_service_start()
    
    # Use service for testing
    options = UiAutomator2Options()
    driver = webdriver.Remote(service_url, options=options)
    
    # Run tests
    run_tests(driver)
    
except AppiumServiceError as e:
    print(f"Service management error: {e}")
    # Handle service error (e.g., use remote service)
    
except Exception as e:
    print(f"Test execution error: {e}")
    
finally:
    # Clean up
    if 'driver' in locals():
        driver.quit()
    if 'service' in locals() and service.is_running:
        service.stop()

# Service types
ServiceURL = str  # Format: "http://hostname:port"
Port = int       # Port number (typically 4723)
ExecutablePath = str  # Full path to executable
Timeout = int    # Timeout in seconds

# Service configuration
ServiceArgs = List[str]  # Command line arguments
ServiceEnv = Dict[str, str]  # Environment variables
ServiceOptions = Dict[str, Union[int, List[str], Dict[str, str]]]

# Service state
ServiceStatus = bool  # Running/stopped state
ConnectionStatus = bool  # Listening/not listening

# Exception types
ServiceError = AppiumServiceError
StartupError = AppiumStartupError

# Validator function type
ValidatorFunction = Callable[[Any], bool]