import os
from pathlib import Path

import pytest
from fastapi.testclient import TestClient


@pytest.fixture
def tmp_registry(tmp_path: Path):
    """Set REGISTRY_PATH env var to a temp file for test isolation."""
    registry = str(tmp_path / "projects.json")
    os.environ["REGISTRY_PATH"] = registry
    yield registry
    os.environ.pop("REGISTRY_PATH", None)


@pytest.fixture
def client(tmp_registry):
    """Create a test client with isolated registry."""
    from app.main import create_app
    app = create_app()
    return TestClient(app)


@pytest.fixture
def design_dir(tmp_path: Path) -> Path:
    """Create a minimal design directory for testing."""
    d = tmp_path / "design"
    d.mkdir()
    return d