from __future__ import annotations

import os
from dataclasses import dataclass
from pathlib import Path


def _bool(name: str, default: bool = False) -> bool:
    return os.getenv(name, str(default)).strip().lower() in {"1", "true", "yes", "on"}


def _int(name: str, default: int) -> int:
    try:
        return int(os.getenv(name, str(default)))
    except ValueError:
        return default


@dataclass(frozen=True)
class Settings:
    app_name: str = os.getenv("MAESTER_APP_NAME", "Maester Enterprise")
    environment: str = os.getenv("MAESTER_ENV", "production")
    base_dir: Path = Path(os.getenv("MAESTER_BASE_DIR", Path(__file__).resolve().parents[1]))
    data_dir: Path = Path(os.getenv("MAESTER_DATA_DIR", "/app/data"))
    api_key: str = os.getenv("MAESTER_API_KEY", "")
    cpu_safe_mode: bool = _bool("MAESTER_CPU_SAFE_MODE", False)
    allow_dev_without_api_key: bool = _bool("MAESTER_ALLOW_DEV_NO_API_KEY", False)
    mount_services: bool = _bool("MAESTER_MOUNT_SERVICES", True)
    request_body_limit_bytes: int = _int("MAESTER_REQUEST_BODY_LIMIT_BYTES", 1024 * 1024 * 1024)
    rate_limit_per_minute: int = _int("MAESTER_RATE_LIMIT_PER_MINUTE", 120)
    service_timeout_seconds: int = _int("MAESTER_SERVICE_TIMEOUT_SECONDS", 1800)
    allow_public_docs: bool = _bool("MAESTER_ALLOW_PUBLIC_DOCS", False)
    job_max_attempts: int = _int("MAESTER_JOB_MAX_ATTEMPTS", 3)
    job_worker_enabled: bool = _bool("MAESTER_JOB_WORKER_ENABLED", True)
    provider_timeout_seconds: int = _int("MAESTER_PROVIDER_TIMEOUT_SECONDS", 60)
    max_asset_bytes: int = _int("MAESTER_MAX_ASSET_BYTES", 512 * 1024 * 1024)

    @property
    def services_dir(self) -> Path:
        return self.base_dir / "services"

    @property
    def api_key_required(self) -> bool:
        if self.api_key:
            return True
        return not (self.environment == "development" and self.allow_dev_without_api_key)

    def ensure_runtime_dirs(self) -> None:
        for path in (
            self.data_dir,
            self.data_dir / "uploads",
            self.data_dir / "exports",
            self.data_dir / "jobs",
            self.data_dir / "logs",
            self.data_dir / "models",
            self.data_dir / "temp",
            self.data_dir / "automation",
            self.data_dir / "assets",
        ):
            path.mkdir(parents=True, exist_ok=True)


settings = Settings()