import os
from dotenv import load_dotenv

load_dotenv()


class Config:
    """Application configuration loaded from environment variables."""

    # Discord configuration
    DISCORD_TOKEN = os.getenv('DISCORD_TOKEN')
    CHANNEL_ID = os.getenv('CHANNEL_ID')
    COMMAND_PREFIX = os.getenv('COMMAND_PREFIX', '!')

    # Stock configuration
    PRIMARY_TICKER = os.getenv('PRIMARY_TICKER', 'PYPL')
    STOCK_API_PROVIDER = os.getenv('STOCK_API_PROVIDER', 'finnhub')  # 'yahoo' or 'finnhub'
    FINNHUB_API_KEY = os.getenv('FINNHUB_API_KEY')

    # Scheduling configuration
    UPDATE_INTERVAL_HOURS = int(os.getenv('UPDATE_INTERVAL_HOURS', '1'))

    @classmethod
    def validate(cls) -> bool:
        """
        Validate that required configuration values are present.

        Returns:
            True if configuration is valid, False otherwise
        """
        if not cls.DISCORD_TOKEN:
            print("ERROR: DISCORD_TOKEN not set in environment")
            return False

        if not cls.CHANNEL_ID:
            print("ERROR: CHANNEL_ID not set in environment")
            return False

        try:
            int(cls.CHANNEL_ID)
        except ValueError:
            print("ERROR: CHANNEL_ID must be a numeric Discord channel ID")
            return False

        if cls.STOCK_API_PROVIDER == 'finnhub' and not cls.FINNHUB_API_KEY:
            print("ERROR: FINNHUB_API_KEY not set in environment (required when STOCK_API_PROVIDER=finnhub)")
            return False

        return True