"""Environment-backed Fiscal Hub configuration."""

from dataclasses import dataclass
import os
from urllib.parse import quote


def _database_url() -> str:
    configured = os.getenv("DATABASE_URL")
    if configured:
        return configured
    password = quote(os.getenv("POSTGRES_PASSWORD", "gti"), safe="")
    return f"postgresql+psycopg://gti:{password}@postgres:5432/gti_fiscal"


@dataclass(frozen=True)
class Settings:
    database_url: str = _database_url()
    hub_port: int = int(os.getenv("HUB_PORT", "8000"))
    # AGENT_DEV_TOKEN auto-bootstraps an agent from a fixed dev token on every request.
    # Leave unset in any environment other than local development — production Agents
    # must be created via scripts/register_agent.py, whose token is never derived from
    # this setting.
    agent_dev_token: str = os.getenv("AGENT_DEV_TOKEN", "")
    environment: str = os.getenv("APP_ENV", "development")
    log_level: str = os.getenv("LOG_LEVEL", "INFO")
    base_url: str = os.getenv("BASE_URL", "http://localhost:8000")
    # An Agent is considered ONLINE if a heartbeat arrived within this many seconds.
    agent_online_threshold_seconds: int = int(os.getenv("AGENT_ONLINE_THRESHOLD_SECONDS", "120"))
    ncm_dataset_url: str = os.getenv("NCM_DATASET_URL", "https://portalunico.siscomex.gov.br/classif/api/publico/nomenclatura/download/json")
    cest_dataset_url: str = os.getenv("CEST_DATASET_URL", "https://www.confaz.fazenda.gov.br/legislacao/convenios/2018/CV142_18")
    dataset_storage_path: str = os.getenv("DATASET_STORAGE_PATH", "./data/datasets")
    http_timeout_seconds: float = float(os.getenv("HTTP_TIMEOUT_SECONDS", "30"))


settings = Settings()