Projektarbeit-MYP/backend/config.py

"""
Konfigurationsklassen für die MYP Flask-Anwendung.
Definiert verschiedene Konfigurationen für Development, Production und Testing.
"""

import os
from datetime import timedelta
import secrets

class Config:
    """Basis-Konfigurationsklasse mit gemeinsamen Einstellungen."""
    
    SECRET_KEY = os.environ.get('SECRET_KEY') or secrets.token_hex(32)
    DATABASE = os.environ.get('DATABASE_PATH', 'instance/myp.db')
    
    # Session-Konfiguration
    SESSION_COOKIE_HTTPONLY = True
    SESSION_COOKIE_SAMESITE = 'Lax'
    PERMANENT_SESSION_LIFETIME = timedelta(days=7)
    
    # Job-Konfiguration
    JOB_CHECK_INTERVAL = int(os.environ.get('JOB_CHECK_INTERVAL', '60'))  # Sekunden
    
    # Tapo-Konfiguration
    TAPO_USERNAME = os.environ.get('TAPO_USERNAME')
    TAPO_PASSWORD = os.environ.get('TAPO_PASSWORD')
    
    # Logging-Konfiguration
    LOG_LEVEL = os.environ.get('LOG_LEVEL', 'INFO')
    LOG_MAX_BYTES = int(os.environ.get('LOG_MAX_BYTES', '10485760'))  # 10MB
    LOG_BACKUP_COUNT = int(os.environ.get('LOG_BACKUP_COUNT', '10'))
    
    # Drucker-Konfiguration
    PRINTERS = os.environ.get('PRINTERS', '{}')
    
    # JSON-Konfiguration parsen
    @property 
    def PRINTERS_DICT(self):
        """Parse PRINTERS configuration as JSON"""
        import json
        printers_str = self.PRINTERS
        if isinstance(printers_str, dict):
            return printers_str
        try:
            return json.loads(printers_str) if printers_str else {}
        except (json.JSONDecodeError, TypeError):
            return {}
    
    # API-Konfiguration
    API_KEY = os.environ.get('API_KEY')
    
    # Rate Limiting
    RATE_LIMIT_ENABLED = True
    MAX_REQUESTS_PER_MINUTE = int(os.environ.get('MAX_REQUESTS_PER_MINUTE', '100'))
    RATE_LIMIT_WINDOW_MINUTES = int(os.environ.get('RATE_LIMIT_WINDOW_MINUTES', '15'))
    
    # Security
    SECURITY_ENABLED = True
    MAX_CONTENT_LENGTH = 16 * 1024 * 1024  # 16MB
    
    @staticmethod
    def init_app(app):
        """Initialisierung der Anwendung mit der Konfiguration."""
        pass

class DevelopmentConfig(Config):
    """Konfiguration für die Entwicklungsumgebung."""
    
    DEBUG = True
    TESTING = False
    
    # Session-Cookies in Development weniger strikt
    SESSION_COOKIE_SECURE = False
    
    # Kürzere Job-Check-Intervalle für schnellere Entwicklung
    JOB_CHECK_INTERVAL = int(os.environ.get('JOB_CHECK_INTERVAL', '30'))
    
    # Weniger strikte Sicherheit in Development
    SECURITY_ENABLED = False
    RATE_LIMIT_ENABLED = False
    
    @staticmethod
    def init_app(app):
        Config.init_app(app)
        
        # Development-spezifische Initialisierung
        import logging
        logging.basicConfig(level=logging.DEBUG)

class ProductionConfig(Config):
    """Konfiguration für die Produktionsumgebung."""
    
    DEBUG = False
    TESTING = False
    
    # Sichere Session-Cookies in Production
    SESSION_COOKIE_SECURE = True
    SESSION_COOKIE_HTTPONLY = True
    SESSION_COOKIE_SAMESITE = 'Strict'
    
    # Strengere Sicherheitseinstellungen
    WTF_CSRF_ENABLED = True
    WTF_CSRF_TIME_LIMIT = None
    
    # Längere Job-Check-Intervalle für bessere Performance
    JOB_CHECK_INTERVAL = int(os.environ.get('JOB_CHECK_INTERVAL', '60'))
    
    # Produktions-Sicherheit
    SECURITY_ENABLED = True
    RATE_LIMIT_ENABLED = True
    MAX_REQUESTS_PER_MINUTE = int(os.environ.get('MAX_REQUESTS_PER_MINUTE', '60'))
    
    # HTTPS-Enforcement (wenn verfügbar)
    FORCE_HTTPS = os.environ.get('FORCE_HTTPS', 'False').lower() == 'true'
    
    @staticmethod
    def init_app(app):
        Config.init_app(app)
        
        # Production-spezifische Initialisierung
        import logging
        from logging.handlers import RotatingFileHandler, SysLogHandler
        
        # Datei-Logging
        if not os.path.exists('logs'):
            os.mkdir('logs')
        
        # Windows-kompatibles Logging
        import platform
        if platform.system() == 'Windows':
            # Windows: Verwende TimedRotatingFileHandler statt RotatingFileHandler
            from logging.handlers import TimedRotatingFileHandler
            
            file_handler = TimedRotatingFileHandler(
                'logs/myp.log',
                when='midnight',
                interval=1,
                backupCount=Config.LOG_BACKUP_COUNT
            )
            
            error_handler = TimedRotatingFileHandler(
                'logs/myp-errors.log',
                when='midnight',
                interval=1,
                backupCount=Config.LOG_BACKUP_COUNT
            )
            
            security_handler = TimedRotatingFileHandler(
                'logs/security.log',
                when='midnight', 
                interval=1,
                backupCount=Config.LOG_BACKUP_COUNT
            )
        else:
            # Linux/Unix: Verwende RotatingFileHandler
            file_handler = RotatingFileHandler(
                'logs/myp.log',
                maxBytes=Config.LOG_MAX_BYTES,
                backupCount=Config.LOG_BACKUP_COUNT
            )
            
            error_handler = RotatingFileHandler(
                'logs/myp-errors.log',
                maxBytes=Config.LOG_MAX_BYTES,
                backupCount=Config.LOG_BACKUP_COUNT
            )
            
            security_handler = RotatingFileHandler(
                'logs/security.log',
                maxBytes=Config.LOG_MAX_BYTES,
                backupCount=Config.LOG_BACKUP_COUNT
            )
        
        file_handler.setFormatter(logging.Formatter(
            '%(asctime)s %(levelname)s: %(message)s [in %(pathname)s:%(lineno)d]'
        ))
        file_handler.setLevel(logging.INFO)
        app.logger.addHandler(file_handler)
        
        error_handler.setFormatter(logging.Formatter(
            '%(asctime)s %(levelname)s: %(message)s [in %(pathname)s:%(lineno)d]'
        ))
        error_handler.setLevel(logging.ERROR)
        app.logger.addHandler(error_handler)
        
        security_handler.setFormatter(logging.Formatter(
            '%(asctime)s SECURITY %(levelname)s: %(message)s [%(name)s]'
        ))
        security_handler.setLevel(logging.WARNING)
        
        # Security-Logger
        security_logger = logging.getLogger('security')
        security_logger.addHandler(security_handler)
        security_logger.setLevel(logging.WARNING)
        
        app.logger.setLevel(logging.INFO)
        app.logger.info('MYP Backend starting in production mode')
        
        # Sicherheits-Middleware registrieren (optional)
        if app.config.get('SECURITY_ENABLED', True):
            try:
                from security import security_middleware
                security_middleware.init_app(app)
            except ImportError:
                app.logger.warning('Security module not found, skipping security middleware')

class TestingConfig(Config):
    """Konfiguration für die Testumgebung."""
    
    DEBUG = True
    TESTING = True
    
    # In-Memory-Datenbank für Tests
    DATABASE = ':memory:'
    
    # Deaktiviere CSRF für Tests
    WTF_CSRF_ENABLED = False
    
    # Kürzere Session-Lebensdauer für Tests
    PERMANENT_SESSION_LIFETIME = timedelta(minutes=5)
    
    # Kürzere Job-Check-Intervalle für Tests
    JOB_CHECK_INTERVAL = 5
    
    # Deaktiviere Sicherheit für Tests
    SECURITY_ENABLED = False
    RATE_LIMIT_ENABLED = False
    
    @staticmethod
    def init_app(app):
        Config.init_app(app)

# Konfigurationsmapping
config = {
    'development': DevelopmentConfig,
    'production': ProductionConfig,
    'testing': TestingConfig,
    'default': DevelopmentConfig
}