import importlib
import unittest
from fastapi.testclient import TestClient

from db import connect, create
import main
import tests.test_data as test_data


def reload_test_data():
    global test_data
    test_data = importlib.reload(test_data)


class TestShoppingAPI(unittest.IsolatedAsyncioTestCase):
    async def asyncSetUp(self):
        self.conn = await connect(":memory:")
        await create(self.conn)
        await test_data.create_test_data(self.conn)
        reload_test_data()

        async def override_get_db():
            try:
                yield self.conn
            finally:
                pass

        main.app.dependency_overrides[main.get_db] = override_get_db
        self.client = TestClient(main.app)
        return await super().asyncSetUp()

    async def asyncTearDown(self) -> None:
        await self.conn.close()
        main.app.dependency_overrides.clear()
        return await super().asyncTearDown()

    def test_purchase_unauthorized_without_cookie(self):
        # Do NOT override cookie_person; no cookie provided => 401
        body = {"storeName": "woolworths", "items": []}
        resp = self.client.post("/api/v1/shopping", json=body)
        assert resp.status_code == 401
        assert "application/problem+json" in resp.headers.get("content-type", "")
        prob = resp.json()
        assert prob.get("status") == 401
        assert prob.get("title")

    def test_purchase_validation_error_returns_problem(self):
        # Override cookie_person to simulate authenticated user
        async def override_cookie_person():
            return test_data.Persons.jacob

        main.app.dependency_overrides[main.cookie_person] = override_cookie_person

        # Empty items triggers domain validation error => 400 with Problem Details
        body = {"storeName": "woolworths", "items": []}
        resp = self.client.post("/api/v1/shopping", json=body)
        assert resp.status_code == 400
        assert "application/problem+json" in resp.headers.get("content-type", "")
        prob = resp.json()
        assert prob.get("status") == 400
        assert "items" in prob.get("title", "").lower() or prob.get("title")