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app/config.py

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+import os
+from pathlib import Path
+
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+
+class Config:
+    ENV_NAME = os.getenv('FLASK_ENV', 'development')
+    SECRET_KEY = os.getenv('SECRET_KEY', 'dev-secret-key')
+    SQLALCHEMY_DATABASE_URI = os.getenv('DATABASE_URL', f"sqlite:///{BASE_DIR / 'instance' / 'expense_monitor.db'}")
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
+    APP_HOST = os.getenv('APP_HOST', '127.0.0.1')
+    APP_PORT = int(os.getenv('APP_PORT', '5000'))
+    DEFAULT_MAX_UPLOAD_MB = int(os.getenv('MAX_CONTENT_LENGTH_MB', '10'))
+    MAX_CONTENT_LENGTH = DEFAULT_MAX_UPLOAD_MB * 1024 * 1024
+    REGISTRATION_ENABLED = os.getenv('REGISTRATION_ENABLED', 'false').lower() == 'true'
+    MAIL_SERVER = os.getenv('MAIL_SERVER', '')
+    MAIL_PORT = int(os.getenv('MAIL_PORT', '465'))
+    MAIL_USE_TLS = os.getenv('MAIL_USE_TLS', 'false').lower() == 'true'
+    MAIL_USE_SSL = os.getenv('MAIL_USE_SSL', 'true').lower() == 'true'
+    MAIL_USERNAME = os.getenv('MAIL_USERNAME', '')
+    MAIL_PASSWORD = os.getenv('MAIL_PASSWORD', '')
+    MAIL_DEFAULT_SENDER = os.getenv('MAIL_DEFAULT_SENDER', 'no-reply@example.com')
+    REMEMBER_COOKIE_HTTPONLY = True
+    REMEMBER_COOKIE_SAMESITE = 'Lax'
+    SESSION_COOKIE_HTTPONLY = True
+    SESSION_COOKIE_SAMESITE = 'Lax'
+    SESSION_COOKIE_SECURE = os.getenv('FLASK_ENV', 'development') != 'development'
+    PREFERRED_URL_SCHEME = 'https' if SESSION_COOKIE_SECURE else 'http'
+    LANGUAGES = ['pl', 'en']
+    DEFAULT_LANGUAGE = 'pl'
+    UPLOAD_EXTENSIONS = {'png', 'jpg', 'jpeg', 'heic', 'pdf'}
+
+
+class TestConfig(Config):
+    TESTING = True
+    WTF_CSRF_ENABLED = False
+    SQLALCHEMY_DATABASE_URI = 'sqlite:///:memory:'
+    SESSION_COOKIE_SECURE = False
+    LOGIN_DISABLED = False