"""Ephemeral store path must not block backend init unless KINK_FAIL_ON_EPHEMERAL_STORE is set."""
from __future__ import annotations

import os
import sys
from pathlib import Path

import pytest

from backend import Backend


def _ephemeral_db_path(name: str) -> Path:
    root = Path("/tmp") / "kink_cli_ephemeral_tests"
    root.mkdir(parents=True, exist_ok=True)
    return root / name


def _ensure_store_passthrough(target: Path) -> Path:
    resolved = Path(target).resolve()
    assert resolved.is_file(), "fixture must supply a non-empty SQLite file"
    return resolved


@pytest.fixture
def valid_sqlite_under_tmp() -> Path:
    """Real DB under /tmp so _store_path_is_ephemeral is true (Linux HF Spaces default)."""
    p = _ephemeral_db_path(f"ephemeral_guard_{os.getpid()}.db")
    if p.is_file():
        p.unlink()
    Backend(p)
    return p.resolve()


def _fresh_api() -> object:
    sys.modules.pop("api", None)
    return __import__("api", fromlist=["app"])


def test_space_require_full_catalog_ephemeral_store_still_initializes_backend(
    monkeypatch: pytest.MonkeyPatch,
    valid_sqlite_under_tmp: Path,
) -> None:
    """Regression: SPACE_ID + require-full + /tmp used to raise before Backend() (live Space 500s)."""
    monkeypatch.setenv("KINK_STORE_PATH", str(valid_sqlite_under_tmp))
    monkeypatch.setenv("SPACE_ID", "hf-test")
    monkeypatch.setenv("KINK_HF_REQUIRE_FULL_CATALOG", "1")
    monkeypatch.setenv("KINK_SKIP_HEAVY_WARM", "1")

    api_mod = _fresh_api()

    monkeypatch.setattr(api_mod, "ensure_store_db", _ensure_store_passthrough)
    api_mod._backend_impl = None
    b = api_mod._get_backend()
    assert b is not None
    assert api_mod._backend_impl is b


def test_fail_on_ephemeral_store_env_still_aborts(monkeypatch: pytest.MonkeyPatch, valid_sqlite_under_tmp: Path) -> None:
    monkeypatch.setenv("KINK_STORE_PATH", str(valid_sqlite_under_tmp))
    monkeypatch.setenv("SPACE_ID", "hf-test")
    monkeypatch.setenv("KINK_HF_REQUIRE_FULL_CATALOG", "1")
    monkeypatch.setenv("KINK_SKIP_HEAVY_WARM", "1")
    monkeypatch.setenv("KINK_FAIL_ON_EPHEMERAL_STORE", "1")

    api_mod = _fresh_api()

    monkeypatch.setattr(api_mod, "ensure_store_db", _ensure_store_passthrough)
    api_mod._backend_impl = None
    with pytest.raises(RuntimeError, match="ephemeral"):
        api_mod._get_backend()