"""
Configuration management for the cryptocurrency trading platform.
"""

import os
from typing import Optional

from dotenv import load_dotenv

# Load environment variables from .env file
load_dotenv()


def get_redis_url() -> str:
    """
    Get Redis connection URL from environment variables.
    
    Returns:
        Redis connection URL
    """
    return os.getenv("REDIS_URL", "redis://localhost:6379/0")


def get_timescaledb_url() -> str:
    """
    Get TimescaleDB connection URL from environment variables.
    
    Returns:
        TimescaleDB connection URL
    """
    return os.getenv("TIMESCALEDB_URL", "postgresql://localhost:5432/trading")


def get_supported_exchanges() -> list:
    """
    Get list of supported exchanges from environment variables.
    
    Returns:
        List of supported exchange names
    """
    exchanges = os.getenv("SUPPORTED_EXCHANGES", "binance")
    return [ex.strip() for ex in exchanges.split(",") if ex.strip()]


def get_exchange_config(exchange_name: str) -> dict:
    """
    Get configuration for a specific exchange.
    
    Args:
        exchange_name: Name of the exchange
        
    Returns:
        Exchange configuration dictionary
    """
    config = {
        "binance": {
            "ws_url": "wss://stream.binance.com:9443",
            "api_url": "https://api.binance.com",
            "max_concurrent_connections": 1000,
        },
        "okx": {
            "ws_url": "wss://ws.okx.com:8443",
            "api_url": "https://www.okx.com",
            "max_concurrent_connections": 1000,
        }
    }
    
    return config.get(exchange_name.lower(), {})