"""
Exchange registry for supported exchanges.

This module contains the registry of supported exchanges and their capabilities,
separated to avoid circular import issues.
"""

from utils.logger import get_logger
from .exceptions import ExchangeNotSupportedError

# Initialize logger
logger = get_logger('exchanges')

# Exchange registry for factory pattern
EXCHANGE_REGISTRY = {
    'okx': {
        'collector': 'data.exchanges.okx.collector.OKXCollector',
        'websocket': 'data.exchanges.okx.websocket.OKXWebSocketClient',
        'name': 'OKX',
        'supported_pairs': ['BTC-USDT', 'ETH-USDT', 'SOL-USDT', 'DOGE-USDT', 'TON-USDT'],
        'supported_data_types': ['trade', 'orderbook', 'ticker', 'candles']
    }
}


def get_supported_exchanges() -> list:
    """Get list of supported exchange names."""
    exchanges = list(EXCHANGE_REGISTRY.keys())
    logger.debug(f"Available exchanges: {exchanges}")
    return exchanges


def get_exchange_info(exchange_name: str) -> dict:
    """
    Get information about a specific exchange.
    
    Args:
        exchange_name: Name of the exchange
        
    Returns:
        Dictionary containing exchange information
        
    Raises:
        ExchangeNotSupportedError: If exchange is not found in registry
    """
    exchange_name = exchange_name.lower()
    exchange_info = EXCHANGE_REGISTRY.get(exchange_name)
    
    if not exchange_info:
        error_msg = f"Exchange '{exchange_name}' not found in registry"
        logger.error(error_msg)
        raise ExchangeNotSupportedError(error_msg)
        
    logger.debug(f"Retrieved info for exchange: {exchange_name}")
    return exchange_info