config.py

"""
Configuration module for Facebook FAQ Bot
"""
import os
from dotenv import load_dotenv

# Load environment variables from .env file
load_dotenv()


class Config:
    """Configuration class for bot settings"""
    
    # Facebook credentials
    FACEBOOK_PAGE_ACCESS_TOKEN = os.getenv('FACEBOOK_PAGE_ACCESS_TOKEN')
    FACEBOOK_VERIFY_TOKEN = os.getenv('FACEBOOK_VERIFY_TOKEN')
    APP_SECRET = os.getenv('APP_SECRET')
    
    # Matching threshold for FAQ responses (0.0 to 1.0)
    MATCH_THRESHOLD = float(os.getenv('MATCH_THRESHOLD', '0.3'))
    
    # Flask settings
    DEBUG = os.getenv('DEBUG', 'False').lower() == 'true'
    PORT = int(os.getenv('PORT', '5000'))
    HOST = os.getenv('HOST', '0.0.0.0')
    
    @classmethod
    def validate(cls):
        """Validate that all required configuration is present"""
        missing = []
        
        if not cls.FACEBOOK_PAGE_ACCESS_TOKEN:
            missing.append('FACEBOOK_PAGE_ACCESS_TOKEN')
        if not cls.FACEBOOK_VERIFY_TOKEN:
            missing.append('FACEBOOK_VERIFY_TOKEN')
        if not cls.APP_SECRET:
            missing.append('APP_SECRET')
        
        if missing:
            raise ValueError(
                f"Missing required environment variables: {', '.join(missing)}\n"
                "Please check your .env file or environment configuration."
            )
        
        return True