"""Application configuration using pydantic-settings"""

from typing import Optional
from pydantic_settings import BaseSettings
from functools import lru_cache


class Settings(BaseSettings):
    """Main application settings"""

    # Bot Configuration
    bot_token: str
    bot_admin_id: int

    # Database Configuration
    database_url: str
    database_echo: bool = False

    # Database Credentials (for Docker)
    db_password: Optional[str] = None
    db_user: Optional[str] = None
    db_name: Optional[str] = None

    # Redis Configuration
    redis_url: str = "redis://localhost:6379/0"

    # Application Configuration
    app_debug: bool = False
    app_env: str = "development"
    log_level: str = "INFO"

    # API Configuration
    api_host: str = "0.0.0.0"
    api_port: int = 8000

    # Timezone
    tz: str = "Europe/Moscow"

    # Security Configuration
    jwt_secret_key: str = "your-secret-key-change-in-production"
    hmac_secret_key: str = "your-hmac-secret-change-in-production"
    require_hmac_verification: bool = False  # Disabled by default in MVP
    access_token_expire_minutes: int = 15
    refresh_token_expire_days: int = 30

    # CORS Configuration
    cors_allowed_origins: list[str] = ["http://localhost:3000", "http://localhost:8081"]
    cors_allow_credentials: bool = True
    cors_allow_methods: list[str] = ["GET", "POST", "PUT", "DELETE", "OPTIONS"]
    cors_allow_headers: list[str] = ["*"]

    # Feature Flags
    feature_telegram_bot_enabled: bool = True
    feature_transaction_approval: bool = True
    feature_event_logging: bool = True

    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"
        case_sensitive = False


@lru_cache()
def get_settings() -> Settings:
    """Get cached settings instance"""
    return Settings()


# Global settings instance for direct imports
settings = get_settings()