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config.py

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+"""Configuration module for loading environment variables."""
+import os
+from typing import Optional
+from dotenv import load_dotenv
+
+# Load environment variables from .env file
+load_dotenv()
+
+
+class Config:
+    """Application configuration."""
+    
+    # Telegram Bot Token
+    BOT_TOKEN: Optional[str] = os.getenv("BOT_TOKEN")
+    if not BOT_TOKEN:
+        raise ValueError("BOT_TOKEN environment variable is required")
+    
+    # Database configuration
+    DATABASE_URL: Optional[str] = os.getenv("DATABASE_URL")
+    if not DATABASE_URL:
+        raise ValueError("DATABASE_URL environment variable is required")
+    
+    # Notification settings
+    NOTIFICATION_TIME: str = os.getenv("NOTIFICATION_TIME", "09:00") or "09:00"
+    TIMEZONE: str = os.getenv("TIMEZONE", "UTC") or "UTC"
+    
+    @classmethod
+    def validate(cls) -> None:
+        """Validate that all required configuration is present."""
+        if not cls.BOT_TOKEN:
+            raise ValueError("BOT_TOKEN is required")
+        if not cls.DATABASE_URL:
+            raise ValueError("DATABASE_URL is required")