"""
Configuration module for VNDB Telegram Bot
Handles environment variables and settings
"""
import os
from typing import Optional
from dotenv import load_dotenv

# Load environment variables from .env file
load_dotenv()


class Config:
    """Bot configuration class"""
    
    # Telegram configuration
    TELEGRAM_BOT_TOKEN: str = os.getenv("TELEGRAM_BOT_TOKEN", "")
    
    # VNDB API configuration
    VNDB_TOKEN: Optional[str] = os.getenv("VNDB_TOKEN")
    USE_SANDBOX: bool = os.getenv("USE_SANDBOX", "false").lower() == "true"
    
    # Logging configuration
    LOG_LEVEL: str = os.getenv("LOG_LEVEL", "INFO")
    
    # API limits
    MAX_RESULTS_PER_PAGE: int = 100
    DEFAULT_RESULTS_PER_PAGE: int = 10
    MAX_QUOTES_AT_ONCE: int = 5
    
    # Timeouts (in seconds)
    API_TIMEOUT: int = 10
    BOT_TIMEOUT: int = 30
    
    @classmethod
    def validate(cls) -> bool:
        """Validate that required configuration is present"""
        if not cls.TELEGRAM_BOT_TOKEN:
            raise ValueError("TELEGRAM_BOT_TOKEN environment variable is required")
        return True
    
    @classmethod
    def to_dict(cls) -> dict:
        """Convert config to dictionary"""
        return {
            "TELEGRAM_BOT_TOKEN": "***" if cls.TELEGRAM_BOT_TOKEN else "NOT SET",
            "VNDB_TOKEN": "SET" if cls.VNDB_TOKEN else "NOT SET",
            "USE_SANDBOX": cls.USE_SANDBOX,
            "LOG_LEVEL": cls.LOG_LEVEL,
            "MAX_RESULTS_PER_PAGE": cls.MAX_RESULTS_PER_PAGE,
            "DEFAULT_RESULTS_PER_PAGE": cls.DEFAULT_RESULTS_PER_PAGE,
            "API_TIMEOUT": cls.API_TIMEOUT,
        }