from functools import lru_cache

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, gt=0, le=30)
    max_redirects: int = Field(default=5, ge=0, le=10)
    max_monitors: int = Field(default=1000, gt=0, le=100_000)
    log_level: str = Field(default="INFO", pattern="^(DEBUG|INFO|WARNING|ERROR|CRITICAL)$")


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