import datetime

TODAY = datetime.date.today().isoformat()


async def test_get_diary_returns_200(auth_client, diary):
    response = await auth_client.get(f"/api/diary/{TODAY}")
    assert response.status_code == 200


async def test_get_diary_returns_correct_fields(auth_client, diary, user_settings):
    response = await auth_client.get(f"/api/diary/{TODAY}")
    body = response.json()
    assert body["date"] == TODAY
    assert body["protein_goal"] == user_settings.protein_goal
    assert body["calories_goal"] == user_settings.calories_goal
    assert "meals" in body
    assert "id" in body


async def test_get_diary_not_found_returns_404(auth_client):
    response = await auth_client.get("/api/diary/2000-01-01")
    assert response.status_code == 404


async def test_get_diary_without_auth_returns_401(client):
    response = await client.get(f"/api/diary/{TODAY}")
    assert response.status_code == 401


async def test_create_diary_returns_201(auth_client, user_settings):
    response = await auth_client.post("/api/diary", json={"date": "2030-06-01"})
    assert response.status_code == 201


async def test_create_diary_copies_goals_from_user_settings(auth_client, user_settings):
    response = await auth_client.post("/api/diary", json={"date": "2030-06-02"})
    body = response.json()
    assert body["protein_goal"] == user_settings.protein_goal
    assert body["carb_goal"] == user_settings.carb_goal
    assert body["fat_goal"] == user_settings.fat_goal
    assert body["fiber_goal"] == user_settings.fiber_goal
    assert body["calories_goal"] == user_settings.calories_goal


async def test_create_diary_creates_breakfast_meal(auth_client, user_settings):
    response = await auth_client.post("/api/diary", json={"date": "2030-06-03"})
    meals = response.json()["meals"]
    assert len(meals) == 1
    assert meals[0]["name"] == "Breakfast"
    assert meals[0]["order"] == 0


async def test_create_diary_without_settings_returns_404(auth_client):
    response = await auth_client.post("/api/diary", json={"date": "2030-06-04"})
    assert response.status_code == 404


async def test_create_diary_duplicate_date_returns_409(auth_client, user_settings):
    await auth_client.post("/api/diary", json={"date": "2030-06-05"})
    response = await auth_client.post("/api/diary", json={"date": "2030-06-05"})
    assert response.status_code == 409


async def test_create_diary_without_auth_returns_401(client):
    response = await client.post("/api/diary", json={"date": "2030-06-06"})
    assert response.status_code == 401


async def test_update_diary_returns_200(auth_client, diary):
    response = await auth_client.patch(
        f"/api/diary/{TODAY}", json={"protein_goal": 180.0}
    )
    assert response.status_code == 200


async def test_update_diary_partial_update(auth_client, diary, user_settings):
    response = await auth_client.patch(
        f"/api/diary/{TODAY}", json={"protein_goal": 180.0}
    )
    body = response.json()
    assert body["protein_goal"] == 180.0
    assert body["carb_goal"] == user_settings.carb_goal
    assert body["fat_goal"] == user_settings.fat_goal
    assert (
        body["calories_goal"] != user_settings.calories_goal
    )  # recalculated since None


async def test_update_diary_all_goals(auth_client, diary):
    payload = {
        "protein_goal": 120.0,
        "carb_goal": 250.0,
        "fat_goal": 60.0,
        "fiber_goal": 25.0,
        "calories_goal": 1800.0,
    }
    response = await auth_client.patch(f"/api/diary/{TODAY}", json=payload)
    body = response.json()
    assert body["protein_goal"] == 120.0
    assert body["carb_goal"] == 250.0
    assert body["fat_goal"] == 60.0
    assert body["fiber_goal"] == 25.0
    assert body["calories_goal"] == 1800.0


async def test_update_diary_not_found_returns_404(auth_client):
    response = await auth_client.patch(
        "/api/diary/2000-01-01", json={"protein_goal": 180.0}
    )
    assert response.status_code == 404


async def test_update_diary_negative_goal_returns_422(auth_client, diary):
    response = await auth_client.patch(
        f"/api/diary/{TODAY}", json={"protein_goal": -10.0}
    )
    assert response.status_code == 422


async def test_update_diary_without_auth_returns_401(client):
    response = await client.patch(f"/api/diary/{TODAY}", json={"protein_goal": 180.0})
    assert response.status_code == 401