"""
Configuration module for Discord Rare Monitor Bot.
Centralizes environment variable handling and configuration constants.
"""

import os
from typing import Optional


class Config:
    """Configuration class for Discord Rare Monitor Bot."""
    
    # Discord Configuration
    DISCORD_TOKEN: str = os.getenv('DISCORD_RARE_BOT_TOKEN', '')
    COMMON_RARE_CHANNEL_ID: int = int(os.getenv('COMMON_RARE_CHANNEL_ID', '1355328792184226014'))
    GREAT_RARE_CHANNEL_ID: int = int(os.getenv('GREAT_RARE_CHANNEL_ID', '1353676584334131211'))
    
    # WebSocket Configuration
    WEBSOCKET_URL: str = os.getenv('DERETH_TRACKER_WS_URL', 'ws://dereth-tracker:8765/ws/position')
    
    # Logging Configuration
    LOG_LEVEL: str = os.getenv('LOG_LEVEL', 'INFO').upper()
    
    # Rare Classification Configuration
    COMMON_RARE_KEYWORDS: list = ["Crystal", "Jewel", "Pearl", "Elixir", "Kit"]
    
    # WebSocket Retry Configuration
    INITIAL_RETRY_DELAY: int = 5  # seconds
    MAX_RETRY_DELAY: int = 300  # 5 minutes
    
    @classmethod
    def validate(cls) -> list:
        """Validate configuration and return list of errors."""
        errors = []
        
        if not cls.DISCORD_TOKEN:
            errors.append("DISCORD_RARE_BOT_TOKEN environment variable is required")
        
        if not cls.WEBSOCKET_URL:
            errors.append("DERETH_TRACKER_WS_URL environment variable is required")
        
        try:
            cls.COMMON_RARE_CHANNEL_ID = int(cls.COMMON_RARE_CHANNEL_ID)
        except (ValueError, TypeError):
            errors.append("COMMON_RARE_CHANNEL_ID must be a valid integer")
        
        try:
            cls.GREAT_RARE_CHANNEL_ID = int(cls.GREAT_RARE_CHANNEL_ID)
        except (ValueError, TypeError):
            errors.append("GREAT_RARE_CHANNEL_ID must be a valid integer")
        
        return errors
    
    @classmethod
    def log_config(cls, logger):
        """Log current configuration (excluding sensitive data)."""
        logger.info("🔧 Discord Rare Monitor Configuration:")
        logger.info(f"   WebSocket URL: {cls.WEBSOCKET_URL}")
        logger.info(f"   Common Rare Channel ID: {cls.COMMON_RARE_CHANNEL_ID}")
        logger.info(f"   Great Rare Channel ID: {cls.GREAT_RARE_CHANNEL_ID}")
        logger.info(f"   Log Level: {cls.LOG_LEVEL}")
        logger.info(f"   Common Keywords: {cls.COMMON_RARE_KEYWORDS}")
        logger.info(f"   Discord Token: {'✅ Set' if cls.DISCORD_TOKEN else '❌ Not Set'}")


# Global config instance
config = Config()