"""Application configuration"""
import os
from pydantic_settings import BaseSettings
from functools import lru_cache

class Settings(BaseSettings):
    """Application settings"""
    # База данных
    POSTGRES_USER: str = "postgres"
    POSTGRES_PASSWORD: str = "postgres"
    POSTGRES_HOST: str = "postgres"
    POSTGRES_PORT: str = "5432"
    POSTGRES_DB: str = "app"
    POSTGRES_TEST_DB: str = "test_app"
    DATABASE_URL: str | None = None

    # JWT
    SECRET_KEY: str = "your-secret-key"
    ALGORITHM: str = "HS256"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30

    # Режим тестирования
    TESTING: bool = bool(os.getenv("TESTING"))

    # Redis
    REDIS_HOST: str = "redis"
    REDIS_PORT: int = 6379
    REDIS_DB: int = 0
    REDIS_TEST_DB: int = 1

    def get_database_url(self) -> str:
        """Get database URL"""
        if self.DATABASE_URL:
            return self.DATABASE_URL
            
        if self.TESTING:
            return f"postgresql://{self.POSTGRES_USER}:{self.POSTGRES_PASSWORD}@localhost:5432/{self.POSTGRES_TEST_DB}"
        return f"postgresql://{self.POSTGRES_USER}:{self.POSTGRES_PASSWORD}@{self.POSTGRES_HOST}:{self.POSTGRES_PORT}/{self.POSTGRES_DB}"

    def get_redis_url(self) -> str:
        """Get Redis URL"""
        db = self.REDIS_TEST_DB if self.TESTING else self.REDIS_DB
        host = "localhost" if self.TESTING else self.REDIS_HOST
        return f"redis://{host}:{self.REDIS_PORT}/{db}"

    # Telegram
    TELEGRAM_BOT_TOKEN: str = os.getenv("TELEGRAM_BOT_TOKEN", "")
    TELEGRAM_CHAT_ID: str = os.getenv("TELEGRAM_CHAT_ID", "")

    class Config:
        """Pydantic config"""
        env_file = ".env"
        case_sensitive = True

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

settings = get_settings()