from pydantic import ValidationError

from v1.todo.schemas import TodoCreate, TodoReorderRequest, TodoResponse, TodoUpdate


def test_todo_create_accepts_zero_based_order() -> None:
    request = TodoCreate.model_validate({"title": "Test", "priority": 1, "order": 0})

    assert request.order == 0


def test_todo_create_rejects_due_at_field() -> None:
    try:
        TodoCreate.model_validate(
            {
                "title": "Test",
                "priority": 1,
                "order": 0,
                "due_at": "2026-01-01T00:00:00Z",
            }
        )
    except ValidationError:
        return

    raise AssertionError("TodoCreate should reject due_at")


def test_todo_update_rejects_negative_order() -> None:
    try:
        TodoUpdate.model_validate({"order": -1})
    except ValidationError:
        return

    raise AssertionError("TodoUpdate should reject negative order")


def test_todo_response_contains_order_without_due_at() -> None:
    payload = {
        "id": "9d72aa0f-e2d5-4de3-9b2d-4609f53376c0",
        "owner_id": "2f5b38fb-cb6f-44ef-8824-e7978f644bc2",
        "title": "Test",
        "description": None,
        "priority": 1,
        "order": 0,
        "status": "pending",
        "completed_at": None,
        "created_at": "2026-03-20T00:00:00Z",
        "updated_at": "2026-03-20T00:00:00Z",
        "schedule_items": [],
    }

    response = TodoResponse.model_validate(payload)
    dumped = response.model_dump()

    assert dumped["order"] == 0
    assert "due_at" not in dumped


def test_todo_reorder_request_requires_non_empty_items() -> None:
    try:
        TodoReorderRequest(items=[])
    except ValidationError:
        return

    raise AssertionError("TodoReorderRequest should reject empty items")