import unittest
from fastapi.testclient import TestClient

import main
from db import connect, create
from scripts.migration_to_households import run_migration


class TestShoppingRequestIngredientDedupeV2(unittest.IsolatedAsyncioTestCase):
    async def asyncSetUp(self):
        self.conn = await connect(":memory:")
        await create(self.conn)
        await run_migration(self.conn)

        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)

        # Register user and create a household
        r = self.client.post(
            "/api/v1/auth/register",
            json={"email": "ing2@test.com", "password": "pw", "displayName": "Ing2"},
        )
        assert r.status_code == 200, r.text
        token = r.json()["accessToken"]
        self.headers = {"Authorization": f"Bearer {token}"}

        r = self.client.post("/api/v1/households", headers=self.headers, json={"name": "H"})
        assert r.status_code == 200, r.text
        self.slug = r.json()["slug"]

        # Resolve household id
        async with self.conn.execute("SELECT id FROM Household WHERE slug = ?", (self.slug,)) as c:
            row = await c.fetchone()
            assert row is not None
            self.hid = int(row[0])

        # Seed one ingredient in household
        await self.conn.execute(
            "INSERT INTO Ingredient (name, line, unit, quantity, recipe_id, meal_id, household_id) VALUES ('Eggs', '12 eggs', 'dozen', 1, NULL, NULL, ?)",
            (self.hid,),
        )
        async with self.conn.execute("SELECT last_insert_rowid()") as c:
            row = await c.fetchone()
            assert row is not None
            self.eggs_id = int(row[0])
        await self.conn.commit()

    async def asyncTearDown(self):
        await self.conn.close()
        main.app.dependency_overrides.clear()

    def test_request_same_ingredient_twice_deduped(self):
        # First request
        r1 = self.client.post(
            f"/api/v1/households/{self.slug}/shopping/current/ingredients",
            headers=self.headers,
            json={"ingredientId": self.eggs_id},
        )
        assert r1.status_code == 200, r1.text
        item1 = r1.json()

        # Second request for same ingredient should not create a duplicate; return same item
        r2 = self.client.post(
            f"/api/v1/households/{self.slug}/shopping/current/ingredients",
            headers=self.headers,
            json={"ingredientId": self.eggs_id},
        )
        assert r2.status_code == 200, r2.text
        item2 = r2.json()

        assert item1["id"] == item2["id"], "Should return existing request item"

        # Outstanding list should contain exactly one instance for the ingredient
        r = self.client.get(
            f"/api/v1/households/{self.slug}/shopping/current", headers=self.headers
        )
        assert r.status_code == 200, r.text
        cur = r.json()
        outstanding = [i for i in cur["outstandingItems"] if i.get("ingredientId") == self.eggs_id]
        assert len(outstanding) == 1, outstanding