"""Tests for async task execution."""

import pytest
from unittest.mock import AsyncMock, MagicMock, patch

from crewai.agent import Agent
from crewai.task import Task
from crewai.tasks.task_output import TaskOutput
from crewai.tasks.output_format import OutputFormat


@pytest.fixture
def test_agent() -> Agent:
    """Create a test agent."""
    return Agent(
        role="Test Agent",
        goal="Test goal",
        backstory="Test backstory",
        llm="gpt-4o-mini",
        verbose=False,
    )


class TestAsyncTaskExecution:
    """Tests for async task execution methods."""

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_aexecute_sync_basic(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test basic async task execution."""
        mock_execute.return_value = "Async task result"
        task = Task(
            description="Test task description",
            expected_output="Test expected output",
            agent=test_agent,
        )

        result = await task.aexecute_sync()

        assert result is not None
        assert isinstance(result, TaskOutput)
        assert result.raw == "Async task result"
        assert result.agent == "Test Agent"
        mock_execute.assert_called_once()

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_aexecute_sync_with_context(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test async task execution with context."""
        mock_execute.return_value = "Async result"
        task = Task(
            description="Test task description",
            expected_output="Test expected output",
            agent=test_agent,
        )

        context = "Additional context for the task"
        result = await task.aexecute_sync(context=context)

        assert result is not None
        assert task.prompt_context == context
        mock_execute.assert_called_once()
        call_kwargs = mock_execute.call_args[1]
        assert call_kwargs["context"] == context

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_aexecute_sync_with_tools(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test async task execution with custom tools."""
        mock_execute.return_value = "Async result"
        task = Task(
            description="Test task description",
            expected_output="Test expected output",
            agent=test_agent,
        )

        mock_tool = MagicMock()
        mock_tool.name = "test_tool"

        result = await task.aexecute_sync(tools=[mock_tool])

        assert result is not None
        mock_execute.assert_called_once()
        call_kwargs = mock_execute.call_args[1]
        assert mock_tool in call_kwargs["tools"]

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_aexecute_sync_sets_start_and_end_time(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test that async execution sets start and end times."""
        mock_execute.return_value = "Async result"
        task = Task(
            description="Test task description",
            expected_output="Test expected output",
            agent=test_agent,
        )

        assert task.start_time is None
        assert task.end_time is None

        await task.aexecute_sync()

        assert task.start_time is not None
        assert task.end_time is not None
        assert task.end_time >= task.start_time

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_aexecute_sync_stores_output(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test that async execution stores the output."""
        mock_execute.return_value = "Async task result"
        task = Task(
            description="Test task description",
            expected_output="Test expected output",
            agent=test_agent,
        )

        assert task.output is None

        await task.aexecute_sync()

        assert task.output is not None
        assert task.output.raw == "Async task result"

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_aexecute_sync_adds_agent_to_processed_by(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test that async execution adds agent to processed_by_agents."""
        mock_execute.return_value = "Async result"
        task = Task(
            description="Test task description",
            expected_output="Test expected output",
            agent=test_agent,
        )

        assert len(task.processed_by_agents) == 0

        await task.aexecute_sync()

        assert "Test Agent" in task.processed_by_agents

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_aexecute_sync_calls_callback(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test that async execution calls the callback."""
        mock_execute.return_value = "Async result"
        callback = MagicMock()
        task = Task(
            description="Test task description",
            expected_output="Test expected output",
            agent=test_agent,
            callback=callback,
        )

        await task.aexecute_sync()

        callback.assert_called_once()
        assert isinstance(callback.call_args[0][0], TaskOutput)

    @pytest.mark.asyncio
    async def test_aexecute_sync_without_agent_raises(self) -> None:
        """Test that async execution without agent raises exception."""
        task = Task(
            description="Test task",
            expected_output="Test output",
        )

        with pytest.raises(Exception) as exc_info:
            await task.aexecute_sync()

        assert "has no agent assigned" in str(exc_info.value)

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_aexecute_sync_with_different_agent(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test async execution with a different agent than assigned."""
        mock_execute.return_value = "Other agent result"
        task = Task(
            description="Test task description",
            expected_output="Test expected output",
            agent=test_agent,
        )

        other_agent = Agent(
            role="Other Agent",
            goal="Other goal",
            backstory="Other backstory",
            llm="gpt-4o-mini",
            verbose=False,
        )

        result = await task.aexecute_sync(agent=other_agent)

        assert result.raw == "Other agent result"
        assert result.agent == "Other Agent"
        mock_execute.assert_called_once()

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_aexecute_sync_handles_exception(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test that async execution handles exceptions properly."""
        mock_execute.side_effect = RuntimeError("Test error")
        task = Task(
            description="Test task description",
            expected_output="Test expected output",
            agent=test_agent,
        )

        with pytest.raises(RuntimeError) as exc_info:
            await task.aexecute_sync()

        assert "Test error" in str(exc_info.value)
        assert task.end_time is not None


class TestAsyncGuardrails:
    """Tests for async guardrail invocation."""

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_ainvoke_guardrail_success(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test async guardrail invocation with successful validation."""
        mock_execute.return_value = "Async task result"

        def guardrail_fn(output: TaskOutput) -> tuple[bool, str]:
            return True, output.raw

        task = Task(
            description="Test task",
            expected_output="Test output",
            agent=test_agent,
            guardrail=guardrail_fn,
        )

        result = await task.aexecute_sync()

        assert result is not None
        assert result.raw == "Async task result"

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_ainvoke_guardrail_failure_then_success(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test async guardrail that fails then succeeds on retry."""
        mock_execute.side_effect = ["First result", "Second result"]
        call_count = 0

        def guardrail_fn(output: TaskOutput) -> tuple[bool, str]:
            nonlocal call_count
            call_count += 1
            if call_count == 1:
                return False, "First attempt failed"
            return True, output.raw

        task = Task(
            description="Test task",
            expected_output="Test output",
            agent=test_agent,
            guardrail=guardrail_fn,
        )

        result = await task.aexecute_sync()

        assert result is not None
        assert call_count == 2

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_ainvoke_guardrail_max_retries_exceeded(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test async guardrail that exceeds max retries."""
        mock_execute.return_value = "Async result"

        def guardrail_fn(output: TaskOutput) -> tuple[bool, str]:
            return False, "Always fails"

        task = Task(
            description="Test task",
            expected_output="Test output",
            agent=test_agent,
            guardrail=guardrail_fn,
            guardrail_max_retries=2,
        )

        with pytest.raises(Exception) as exc_info:
            await task.aexecute_sync()

        assert "validation after" in str(exc_info.value)
        assert "2 retries" in str(exc_info.value)

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_ainvoke_multiple_guardrails(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test async execution with multiple guardrails."""
        mock_execute.return_value = "Async result"
        guardrail1_called = False
        guardrail2_called = False

        def guardrail1(output: TaskOutput) -> tuple[bool, str]:
            nonlocal guardrail1_called
            guardrail1_called = True
            return True, output.raw

        def guardrail2(output: TaskOutput) -> tuple[bool, str]:
            nonlocal guardrail2_called
            guardrail2_called = True
            return True, output.raw

        task = Task(
            description="Test task",
            expected_output="Test output",
            agent=test_agent,
            guardrails=[guardrail1, guardrail2],
        )

        await task.aexecute_sync()

        assert guardrail1_called
        assert guardrail2_called


class TestAsyncTaskOutput:
    """Tests for async task output handling."""

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_aexecute_sync_output_format_raw(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test async execution with raw output format."""
        mock_execute.return_value = '{"key": "value"}'
        task = Task(
            description="Test task",
            expected_output="Test output",
            agent=test_agent,
        )

        result = await task.aexecute_sync()

        assert result.output_format == OutputFormat.RAW

    @pytest.mark.asyncio
    @patch("crewai.Agent.aexecute_task", new_callable=AsyncMock)
    async def test_aexecute_sync_task_output_attributes(
        self, mock_execute: AsyncMock, test_agent: Agent
    ) -> None:
        """Test that task output has correct attributes."""
        mock_execute.return_value = "Test result"
        task = Task(
            description="Test description",
            expected_output="Test expected",
            agent=test_agent,
            name="Test Task Name",
        )

        result = await task.aexecute_sync()

        assert result.name == "Test Task Name"
        assert result.description == "Test description"
        assert result.expected_output == "Test expected"
        assert result.raw == "Test result"
        assert result.agent == "Test Agent"


class TestThreadedAsyncExecution:
    """Tests for threaded async task execution (execute_async with Future)."""

    @patch("crewai.Agent.execute_task")
    def test_execute_async_basic(
        self, mock_execute: MagicMock, test_agent: Agent
    ) -> None:
        """Test basic threaded async task execution."""
        mock_execute.return_value = "Async task result"
        task = Task(
            description="Test task description",
            expected_output="Test expected output",
            agent=test_agent,
        )

        future = task.execute_async()
        result = future.result(timeout=5)

        assert result is not None
        assert isinstance(result, TaskOutput)
        assert result.raw == "Async task result"
        assert result.agent == "Test Agent"
        mock_execute.assert_called_once()

    @patch("crewai.Agent.execute_task")
    def test_execute_async_exception_completes_future(
        self, mock_execute: MagicMock, test_agent: Agent
    ) -> None:
        """Test that execute_async properly completes the Future when an exception occurs.

        This is a regression test for GitHub issue #4072 where an async task that
        errors would keep its thread alive because the Future was never completed.
        """
        mock_execute.side_effect = ValueError("Something happened here")
        task = Task(
            description="Test task description",
            expected_output="Test expected output",
            agent=test_agent,
        )

        future = task.execute_async()

        with pytest.raises(ValueError) as exc_info:
            future.result(timeout=5)

        assert "Something happened here" in str(exc_info.value)

    @patch("crewai.Agent.execute_task")
    def test_execute_async_exception_sets_end_time(
        self, mock_execute: MagicMock, test_agent: Agent
    ) -> None:
        """Test that execute_async sets end_time even when an exception occurs."""
        mock_execute.side_effect = RuntimeError("Test error")
        task = Task(
            description="Test task description",
            expected_output="Test expected output",
            agent=test_agent,
        )

        future = task.execute_async()

        with pytest.raises(RuntimeError):
            future.result(timeout=5)

        assert task.end_time is not None

    @patch("crewai.Agent.execute_task")
    def test_execute_async_exception_does_not_hang(
        self, mock_execute: MagicMock, test_agent: Agent
    ) -> None:
        """Test that execute_async does not hang when an exception occurs.

        This test verifies that the Future is properly completed with an exception,
        allowing future.result() to return immediately instead of blocking forever.
        """
        mock_execute.side_effect = Exception("Task execution failed")
        task = Task(
            description="Test task description",
            expected_output="Test expected output",
            agent=test_agent,
        )

        future = task.execute_async()

        with pytest.raises(Exception) as exc_info:
            future.result(timeout=1)

        assert "Task execution failed" in str(exc_info.value)