"""Step definitions for plan_executor_subplan_spawning.feature.

Tests that PlanExecutor correctly wires SubplanService and
SubplanExecutionService into the Execute phase so that subplan_spawn
and subplan_parallel_spawn decisions are realised as actual child plan
executions.
"""

from __future__ import annotations

from unittest.mock import MagicMock

from behave import given, then, when
from behave.runner import Context

from cleveragents.application.services.plan_executor import (
    PlanExecutor,
)
from cleveragents.application.services.subplan_execution_service import (
    SubplanExecutionResult,
    SubplanExecutionService,
)
from cleveragents.application.services.subplan_service import (
    SpawnEntry,
    SpawnResult,
    SubplanService,
)
from cleveragents.domain.models.core.decision import (
    ContextSnapshot,
    Decision,
    DecisionType,
)
from cleveragents.domain.models.core.plan import (
    ExecutionMode,
    NamespacedName,
    Plan,
    PlanIdentity,
    PlanPhase,
    ProcessingState,
    SubplanConfig,
    SubplanStatus,
)

# ---------------------------------------------------------------------------
# Constants
# ---------------------------------------------------------------------------

_PLAN_ID = "01KNFMGJSG67S6RG9TVXV205TQ"
_ROOT_ID = "01KNFMGJSH67S6RG9TVXV205TR"
_DEC_ID = "01KNFMGJSH67S6RG9TVXV205TS"
_SUBPLAN_ID = "01KNFMGJSH67S6RG9TVXV205TT"


# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------


def _make_plan(
    *,
    phase: PlanPhase = PlanPhase.EXECUTE,
    state: ProcessingState = ProcessingState.QUEUED,
    subplan_config: SubplanConfig | None = None,
) -> Plan:
    """Build a minimal Plan domain object for testing."""
    return Plan(
        identity=PlanIdentity(
            plan_id=_PLAN_ID,
            root_plan_id=_ROOT_ID,
        ),
        namespaced_name=NamespacedName(namespace="local", name="test-plan"),
        description="Test plan for subplan spawning",
        action_name="local/test-action",
        phase=phase,
        processing_state=state,
        subplan_config=subplan_config,
    )


def _make_spawn_decision(
    decision_type: DecisionType = DecisionType.SUBPLAN_SPAWN,
) -> Decision:
    """Build a spawn-type Decision."""
    return Decision(
        decision_id=_DEC_ID,
        plan_id=_PLAN_ID,
        decision_type=decision_type,
        sequence_number=0,
        question="Spawn a child plan?",
        chosen_option="local/sub-action",
        context_snapshot=ContextSnapshot(relevant_resources=[]),
    )


def _make_subplan_status(
    status: ProcessingState = ProcessingState.COMPLETE,
    error: str | None = None,
) -> SubplanStatus:
    """Build a SubplanStatus for testing."""
    return SubplanStatus(
        subplan_id=_SUBPLAN_ID,
        action_name="local/sub-action",
        status=status,
        error=error,
    )


def _make_spawn_result(
    execution_mode: str = ExecutionMode.SEQUENTIAL,
    status: ProcessingState = ProcessingState.QUEUED,
) -> SpawnResult:
    """Build a SpawnResult with one subplan status."""
    sub_status = SubplanStatus(
        subplan_id=_SUBPLAN_ID,
        action_name="local/sub-action",
        status=status,
    )
    return SpawnResult(
        spawned_statuses=[sub_status],
        metadata={},
        total_spawned=1,
        execution_mode=execution_mode,
        child_plans=[],
    )


def _make_exec_result(
    all_succeeded: bool = True,
    failed_ids: list[str] | None = None,
) -> SubplanExecutionResult:
    """Build a SubplanExecutionResult."""
    failed = failed_ids or []
    status = ProcessingState.COMPLETE if all_succeeded else ProcessingState.ERRORED
    sub_status = SubplanStatus(
        subplan_id=_SUBPLAN_ID,
        action_name="local/sub-action",
        status=status,
        error=None if all_succeeded else "ChildExecError: timeout",
    )
    return SubplanExecutionResult(
        all_succeeded=all_succeeded,
        statuses=[sub_status],
        merge_result=None,
        total_duration_ms=10,
        failed_subplan_ids=failed,
    )


def _make_lifecycle(plan: Plan) -> MagicMock:
    """Build a mock lifecycle service that returns the given plan."""
    lcs = MagicMock()
    lcs.get_plan.return_value = plan
    lcs.start_execute = MagicMock()
    lcs.complete_execute = MagicMock()
    lcs.fail_execute = MagicMock()
    lcs._commit_plan = MagicMock()
    return lcs


def _make_subplan_service(
    decisions: list[Decision] | None = None,
    spawn_result: SpawnResult | None = None,
) -> MagicMock:
    """Build a mock SubplanService."""
    svc = MagicMock(spec=SubplanService)
    svc.get_spawn_decisions.return_value = decisions or []
    svc.build_spawn_entries.return_value = [
        SpawnEntry(
            decision=d,
            action_name="local/sub-action",
        )
        for d in (decisions or [])
    ]
    svc.spawn.return_value = spawn_result or _make_spawn_result()
    return svc


def _make_subplan_execution_service(
    exec_result: SubplanExecutionResult | None = None,
) -> MagicMock:
    """Build a mock SubplanExecutionService."""
    svc = MagicMock(spec=SubplanExecutionService)
    svc.execute_all.return_value = exec_result or _make_exec_result()
    return svc


def _make_executor(
    plan: Plan,
    subplan_service: MagicMock | None = None,
    subplan_execution_service: MagicMock | None = None,
    *,
    runtime_mode: bool = False,
) -> tuple[PlanExecutor, MagicMock]:
    """Build a PlanExecutor with mocked dependencies."""
    lcs = _make_lifecycle(plan)

    if runtime_mode:
        # Minimal execution context mock
        exec_ctx = MagicMock()
        exec_ctx.changeset_store = MagicMock()
        exec_ctx.decision_root_id = None
        exec_ctx.sandbox_root = None
        exec_ctx.sandbox_manager = None

        tool_runner = MagicMock()
        tool_runner.discover.return_value = []

        # Mock RuntimeExecuteActor to avoid real LLM calls
        runtime_actor_result = MagicMock()
        runtime_actor_result.changeset_id = "01JSPAWN0000000000000CS0001"
        runtime_actor_result.sandbox_refs = []
        runtime_actor_result.tool_call_count = 0
        runtime_actor_result.decision_ids_processed = []
        runtime_actor_result.execution_duration_ms = 5

        import unittest.mock as _mock

        with _mock.patch(
            "cleveragents.application.services.plan_executor.RuntimeExecuteActor"
        ) as _MockActor:
            _MockActor.return_value.execute.return_value = runtime_actor_result
            executor = PlanExecutor(
                lifecycle_service=lcs,
                tool_runner=tool_runner,
                execution_context=exec_ctx,
                subplan_service=subplan_service,
                subplan_execution_service=subplan_execution_service,
            )
            # Store the mock actor class for later assertions
            executor._mock_runtime_actor_cls = _MockActor
    else:
        # Stub mode: patch ExecuteStubActor.execute to avoid real work
        execute_actor = MagicMock()
        execute_result = MagicMock()
        execute_result.changeset_id = "01JSPAWN0000000000000CS0001"
        execute_result.sandbox_refs = []
        execute_result.tool_calls_count = 0
        execute_actor.execute.return_value = execute_result

        executor = PlanExecutor(
            lifecycle_service=lcs,
            execute_actor=execute_actor,
            subplan_service=subplan_service,
            subplan_execution_service=subplan_execution_service,
        )

    return executor, lcs


# ---------------------------------------------------------------------------
# Given steps
# ---------------------------------------------------------------------------


@given("a PlanExecutor configured with SubplanService and SubplanExecutionService")
def step_given_executor_with_subplan_services(context: Context) -> None:
    """Set up a PlanExecutor with both subplan services mocked."""
    decision = _make_spawn_decision(DecisionType.SUBPLAN_SPAWN)
    spawn_result = _make_spawn_result()
    exec_result = _make_exec_result(all_succeeded=True)

    context.spawn_decision = decision
    context.spawn_result = spawn_result
    context.exec_result = exec_result

    context.mock_subplan_svc = _make_subplan_service(
        decisions=[decision],
        spawn_result=spawn_result,
    )
    context.mock_exec_svc = _make_subplan_execution_service(exec_result=exec_result)

    plan = _make_plan()
    plan.decision_root_id = _ROOT_ID
    context.plan = plan

    executor, lcs = _make_executor(
        plan,
        subplan_service=context.mock_subplan_svc,
        subplan_execution_service=context.mock_exec_svc,
    )
    context.executor = executor
    context.lcs = lcs


@given(
    "a PlanExecutor configured with SubplanService and SubplanExecutionService "
    "in runtime mode"
)
def step_given_executor_with_subplan_services_runtime(context: Context) -> None:
    """Set up a PlanExecutor in runtime mode with both subplan services mocked."""
    decision = _make_spawn_decision(DecisionType.SUBPLAN_SPAWN)
    spawn_result = _make_spawn_result()
    exec_result = _make_exec_result(all_succeeded=True)

    context.spawn_decision = decision
    context.spawn_result = spawn_result
    context.exec_result = exec_result

    context.mock_subplan_svc = _make_subplan_service(
        decisions=[decision],
        spawn_result=spawn_result,
    )
    context.mock_exec_svc = _make_subplan_execution_service(exec_result=exec_result)

    plan = _make_plan()
    plan.decision_root_id = _ROOT_ID
    context.plan = plan
    context.runtime_mode = True


@given("a parent plan in Execute phase with a subplan_spawn decision")
def step_given_plan_with_spawn_decision(context: Context) -> None:
    """Ensure the plan has a subplan_spawn decision (already set in Given above)."""
    # Plan is already configured in the previous Given step
    assert context.plan is not None
    assert context.plan.phase == PlanPhase.EXECUTE


@given("a parent plan in Execute phase with a subplan_parallel_spawn decision")
def step_given_plan_with_parallel_spawn_decision(context: Context) -> None:
    """Set up a plan with a subplan_parallel_spawn decision."""
    decision = _make_spawn_decision(DecisionType.SUBPLAN_PARALLEL_SPAWN)
    spawn_result = _make_spawn_result(execution_mode=ExecutionMode.PARALLEL)
    exec_result = _make_exec_result(all_succeeded=True)

    context.spawn_decision = decision
    context.spawn_result = spawn_result
    context.exec_result = exec_result

    context.mock_subplan_svc = _make_subplan_service(
        decisions=[decision],
        spawn_result=spawn_result,
    )
    context.mock_exec_svc = _make_subplan_execution_service(exec_result=exec_result)

    plan = _make_plan()
    plan.decision_root_id = _ROOT_ID
    context.plan = plan

    executor, lcs = _make_executor(
        plan,
        subplan_service=context.mock_subplan_svc,
        subplan_execution_service=context.mock_exec_svc,
    )
    context.executor = executor
    context.lcs = lcs


@given("a parent plan in Execute phase with no spawn decisions")
def step_given_plan_with_no_spawn_decisions(context: Context) -> None:
    """Set up a plan with no spawn decisions."""
    context.mock_subplan_svc = _make_subplan_service(decisions=[])
    context.mock_exec_svc = _make_subplan_execution_service()

    plan = _make_plan()
    plan.decision_root_id = _ROOT_ID
    context.plan = plan

    executor, lcs = _make_executor(
        plan,
        subplan_service=context.mock_subplan_svc,
        subplan_execution_service=context.mock_exec_svc,
    )
    context.executor = executor
    context.lcs = lcs


@given("a PlanExecutor with no SubplanService configured")
def step_given_executor_without_subplan_service(context: Context) -> None:
    """Set up a PlanExecutor without SubplanService."""
    plan = _make_plan()
    plan.decision_root_id = _ROOT_ID
    context.plan = plan

    executor, lcs = _make_executor(
        plan,
        subplan_service=None,
        subplan_execution_service=None,
    )
    context.executor = executor
    context.lcs = lcs
    context.mock_subplan_svc = None
    context.mock_exec_svc = None


@given("the SubplanExecutionService will report a failed subplan")
def step_given_exec_svc_reports_failure(context: Context) -> None:
    """Reconfigure the execution service to report a failure."""
    failed_exec_result = _make_exec_result(
        all_succeeded=False,
        failed_ids=[_SUBPLAN_ID],
    )
    context.exec_result = failed_exec_result
    context.mock_exec_svc.execute_all.return_value = failed_exec_result


# ---------------------------------------------------------------------------
# When steps
# ---------------------------------------------------------------------------


@when("I call run_execute on the parent plan")
def step_when_run_execute(context: Context) -> None:
    """Call run_execute on the executor."""
    try:
        context.execute_result = context.executor.run_execute(
            plan_id=_PLAN_ID,
        )
        context.execute_error = None
    except Exception as exc:
        context.execute_result = None
        context.execute_error = exc


@when("I call run_execute on the parent plan in runtime mode")
def step_when_run_execute_runtime(context: Context) -> None:
    """Call run_execute in runtime mode."""
    import unittest.mock as _mock

    plan = context.plan
    lcs = _make_lifecycle(plan)

    exec_ctx = MagicMock()
    exec_ctx.changeset_store = MagicMock()
    exec_ctx.decision_root_id = None
    exec_ctx.sandbox_root = None
    exec_ctx.sandbox_manager = None

    tool_runner = MagicMock()
    tool_runner.discover.return_value = []

    runtime_actor_result = MagicMock()
    runtime_actor_result.changeset_id = "01JSPAWN0000000000000CS0001"
    runtime_actor_result.sandbox_refs = []
    runtime_actor_result.tool_call_count = 0
    runtime_actor_result.decision_ids_processed = []
    runtime_actor_result.execution_duration_ms = 5

    with _mock.patch(
        "cleveragents.application.services.plan_executor.RuntimeExecuteActor"
    ) as MockActor:
        MockActor.return_value.execute.return_value = runtime_actor_result

        executor = PlanExecutor(
            lifecycle_service=lcs,
            tool_runner=tool_runner,
            execution_context=exec_ctx,
            subplan_service=context.mock_subplan_svc,
            subplan_execution_service=context.mock_exec_svc,
        )
        try:
            context.execute_result = executor.run_execute(plan_id=_PLAN_ID)
            context.execute_error = None
        except Exception as exc:
            context.execute_result = None
            context.execute_error = exc

    context.executor = executor
    context.lcs = lcs


# ---------------------------------------------------------------------------
# Then steps
# ---------------------------------------------------------------------------


@then("SubplanService.get_spawn_decisions should have been called")
def step_then_get_spawn_decisions_called(context: Context) -> None:
    """Verify get_spawn_decisions was called with the plan ID."""
    assert context.execute_error is None, f"run_execute raised: {context.execute_error}"
    context.mock_subplan_svc.get_spawn_decisions.assert_called_once_with(_PLAN_ID)


@then("SubplanService.spawn should have been called with the spawn entries")
def step_then_spawn_called(context: Context) -> None:
    """Verify spawn was called."""
    context.mock_subplan_svc.spawn.assert_called_once()


@then("SubplanExecutionService.execute_all should have been called")
def step_then_execute_all_called(context: Context) -> None:
    """Verify execute_all was called."""
    context.mock_exec_svc.execute_all.assert_called_once()


@then("the parent plan subplan_statuses should be updated")
def step_then_subplan_statuses_updated(context: Context) -> None:
    """Verify the plan's subplan_statuses were updated via _commit_plan."""
    context.lcs._commit_plan.assert_called()


@then("SubplanService.spawn should NOT have been called")
def step_then_spawn_not_called(context: Context) -> None:
    """Verify spawn was NOT called (no-op path)."""
    assert context.execute_error is None, f"run_execute raised: {context.execute_error}"
    context.mock_subplan_svc.spawn.assert_not_called()


@then("SubplanExecutionService.execute_all should NOT have been called")
def step_then_execute_all_not_called(context: Context) -> None:
    """Verify execute_all was NOT called (no-op path)."""
    context.mock_exec_svc.execute_all.assert_not_called()


@then("the execute phase completes without error")
def step_then_execute_completes_without_error(context: Context) -> None:
    """Verify run_execute completed without raising."""
    assert context.execute_error is None, (
        f"Expected no error but got: {context.execute_error}"
    )


@then("no subplan spawning occurs")
def step_then_no_subplan_spawning(context: Context) -> None:
    """Verify no subplan spawning occurred (no SubplanService configured)."""
    # No mock_subplan_svc to assert on — just verify no error
    assert context.execute_error is None, (
        f"Expected no error but got: {context.execute_error}"
    )


@then("the parent plan error_details should contain failed_subplan_ids")
def step_then_error_details_has_failed_ids(context: Context) -> None:
    """Verify error_details contains failed_subplan_ids."""
    assert context.execute_error is None, f"run_execute raised: {context.execute_error}"
    # The _commit_plan call should have been made with a plan that has
    # error_details containing failed_subplan_ids
    commit_calls = context.lcs._commit_plan.call_args_list
    assert commit_calls, "Expected _commit_plan to be called"
    # Find the call where error_details was set with failed_subplan_ids
    found = False
    for c in commit_calls:
        committed_plan = c[0][0]
        details = getattr(committed_plan, "error_details", None) or {}
        if "failed_subplan_ids" in details:
            found = True
            break
    assert found, (
        "Expected error_details to contain 'failed_subplan_ids' in a "
        f"_commit_plan call. Calls: {commit_calls}"
    )


@then("the parent plan error_details should contain subplan_execution_failed true")
def step_then_error_details_has_exec_failed(context: Context) -> None:
    """Verify error_details contains subplan_execution_failed=true."""
    commit_calls = context.lcs._commit_plan.call_args_list
    found = False
    for c in commit_calls:
        committed_plan = c[0][0]
        details = getattr(committed_plan, "error_details", None) or {}
        if details.get("subplan_execution_failed") == "true":
            found = True
            break
    assert found, (
        "Expected error_details to contain 'subplan_execution_failed'='true' "
        f"in a _commit_plan call. Calls: {commit_calls}"
    )