"""
Configuration settings for the API client
"""

import os
from typing import Optional

# Default configuration
DEFAULT_BASE_URL = "https://airsltd-ocngx.hf.space"
DEFAULT_USERNAME = "admin"
DEFAULT_PASSWORD = "admin123"
DEFAULT_TIMEOUT = 30

# Environment variable names
ENV_BASE_URL = "API_BASE_URL"
ENV_USERNAME = "API_USERNAME"
ENV_PASSWORD = "API_PASSWORD"
ENV_TIMEOUT = "API_TIMEOUT"
ENV_LOG_LEVEL = "API_LOG_LEVEL"

# HTTP status codes
HTTP_OK = 200
HTTP_UNAUTHORIZED = 401
HTTP_BAD_REQUEST = 400
HTTP_INTERNAL_ERROR = 500

# Content types
CONTENT_TYPE_JSON = "application/json"
CONTENT_TYPE_HTML = "text/html"
CONTENT_TYPE_TEXT = "text/plain"

# Retry configuration
DEFAULT_MAX_RETRIES = 3
DEFAULT_RETRY_BACKOFF = 1.0


class Config:
    """Configuration class for API client settings"""
    
    def __init__(self):
        self.base_url = os.getenv(ENV_BASE_URL, DEFAULT_BASE_URL)
        self.username = os.getenv(ENV_USERNAME, DEFAULT_USERNAME)
        self.password = os.getenv(ENV_PASSWORD, DEFAULT_PASSWORD)
        self.timeout = int(os.getenv(ENV_TIMEOUT, DEFAULT_TIMEOUT))
        self.log_level = os.getenv(ENV_LOG_LEVEL, "INFO")
    
    def __repr__(self):
        return (f"Config(base_url='{self.base_url}', "
                f"username='{self.username}', "
                f"timeout={self.timeout})")


def get_config() -> Config:
    """Get configuration instance"""
    return Config()


def get_connection_params(
    base_url: Optional[str] = None,
    username: Optional[str] = None,
    password: Optional[str] = None,
    timeout: Optional[int] = None
) -> dict:
    """
    Get connection parameters with fallback to environment variables and defaults.
    
    Args:
        base_url: Override base URL
        username: Override username
        password: Override password
        timeout: Override timeout
        
    Returns:
        Dictionary with connection parameters
    """
    config = get_config()
    
    return {
        'base_url': base_url or config.base_url,
        'username': username or config.username,
        'password': password or config.password,
        'timeout': timeout or config.timeout
    }