from functools import lru_cache
from typing import Literal

from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_prefix="MONITOR_", extra="ignore")

    request_timeout_seconds: float = Field(default=5.0, ge=0.1, le=30.0)
    max_redirects: int = Field(default=5, ge=0, le=10)
    max_monitors: int = Field(default=1000, ge=1, le=100_000)
    log_level: Literal["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"] = "INFO"


@lru_cache
def get_settings() -> Settings:
    return Settings()