from datetime import datetime, timezone
from unittest.mock import AsyncMock, MagicMock
from uuid import UUID, uuid4

import pytest

from core.auth.models import CurrentUser
from models.todos import Todo, TodoStatus
from v1.todo.schemas import TodoUpdate
from v1.todo.service import TodoService


def _create_mock_todo() -> Todo:
    todo = MagicMock(spec=Todo)
    todo.id = uuid4()
    todo.owner_id = UUID("00000000-0000-0000-0000-000000000001")
    todo.title = "Test Todo"
    todo.description = None
    todo.priority = 1
    todo.order = 0
    todo.status = TodoStatus.PENDING
    todo.completed_at = None
    now = datetime(2026, 3, 20, 8, 0, 0, tzinfo=timezone.utc)
    todo.created_at = now
    todo.updated_at = now
    return todo


@pytest.mark.asyncio
async def test_update_refreshes_todo_before_building_response() -> None:
    user_id = UUID("00000000-0000-0000-0000-000000000001")
    todo = _create_mock_todo()

    repository = AsyncMock()
    repository.get_by_id.return_value = todo
    repository.update.return_value = todo
    repository.get_schedule_items.return_value = []

    schedule_item_repository = AsyncMock()

    session = AsyncMock()
    service = TodoService(
        repository=repository,
        schedule_item_repository=schedule_item_repository,
        session=session,
        current_user=CurrentUser(id=user_id),
    )

    await service.update(
        todo.id,
        TodoUpdate(
            title="Updated",
            description=None,
            priority=None,
            order=None,
            status=None,
            schedule_item_ids=None,
        ),
    )

    session.commit.assert_awaited_once()
    session.refresh.assert_awaited_once_with(todo)