"""Helper script for tdd_plan_execute_phase_processing.robot smoke tests.

Each subcommand exercises the **CLI orchestration layer** by replicating the
logic of the ``execute_plan`` CLI handler in ``plan.py``.  The helper uses
a real ``PlanLifecycleService`` (in-memory mode) and ``PlanExecutor`` (with
stub actors) to verify that the orchestration correctly handles plans in
Strategize/QUEUED state.

Bug #967: The ``plan execute`` CLI command originally only called
``service.execute_plan(plan_id)``, which is a state transition only
(Strategize/COMPLETE → Execute/QUEUED).  It did not construct a
``PlanExecutor`` or call ``run_strategize()`` / ``run_execute()``.  The fix
added phase-aware orchestration; these tests verify it works.

This test was written to capture bug #967 per ticket #977.  The bug fix is
already in the codebase, so these tests serve as permanent regression guards.
"""

from __future__ import annotations

import sys
from collections.abc import Callable
from pathlib import Path
from typing import NoReturn

_ROOT: Path = Path(__file__).resolve().parents[1]
_SRC: str = str(_ROOT / "src")
if _SRC not in sys.path:
    sys.path.insert(0, _SRC)

from cleveragents.application.services.plan_executor import PlanExecutor  # noqa: E402
from cleveragents.application.services.plan_lifecycle_service import (  # noqa: E402
    PlanLifecycleService,
)
from cleveragents.config.settings import Settings  # noqa: E402
from cleveragents.domain.models.core.plan import (  # noqa: E402
    Plan,
    PlanPhase,
    ProcessingState,
)


def _fail(msg: str) -> NoReturn:
    """Print an error message to stderr and exit with code 1."""
    print(msg, file=sys.stderr)
    sys.exit(1)


def _create_service_and_queued_plan() -> tuple[PlanLifecycleService, str]:
    """Create a real in-memory PlanLifecycleService and a plan in Strategize/QUEUED."""
    service: PlanLifecycleService = PlanLifecycleService(settings=Settings())
    action = service.create_action(
        name="local/tdd-967-robot-action",
        description="TDD action for bug #967 (Robot)",
        definition_of_done="Complete the test plan",
        strategy_actor="local/stub-strategize",
        execution_actor="local/stub-execute",
    )
    plan: Plan = service.use_action(action_name=str(action.namespaced_name))
    return service, plan.identity.plan_id


def _cli_execute_from_queued() -> None:
    """Test the CLI orchestration path for a plan in Strategize/QUEUED.

    Replicates the ``execute_plan`` CLI handler logic: detect the plan is
    in Strategize/QUEUED, run strategize via ``PlanExecutor``, then
    transition to Execute phase.
    """
    service, plan_id = _create_service_and_queued_plan()
    executor: PlanExecutor = PlanExecutor(lifecycle_service=service)

    # Replicate CLI orchestration: detect phase, run strategize if QUEUED
    plan: Plan = service.get_plan(plan_id)
    if plan.phase == PlanPhase.STRATEGIZE and plan.state == ProcessingState.QUEUED:
        executor.run_strategize(plan_id)
        plan = service.get_plan(plan_id)

    # Transition to Execute if still in Strategize/COMPLETE
    if plan.phase == PlanPhase.STRATEGIZE and plan.state == ProcessingState.COMPLETE:
        plan = service.execute_plan(plan_id)
    elif plan.phase != PlanPhase.EXECUTE:
        _fail(
            f"Bug #967: CLI orchestration failed. Plan in unexpected state "
            f"after strategize: {plan.phase.value}/{plan.state.value}"
        )

    if plan.phase != PlanPhase.EXECUTE:
        _fail(f"Bug #967: Expected Execute phase, got {plan.phase.value}")
    print("tdd-cli-execute-from-queued-ok")


def _cli_full_orchestration() -> None:
    """Test the CLI orchestration runs both strategize and execute phases.

    Replicates the full ``execute_plan`` CLI handler: strategize → transition
    → run_execute.
    """
    service, plan_id = _create_service_and_queued_plan()
    executor: PlanExecutor = PlanExecutor(lifecycle_service=service)

    # Step 1: CLI detects Strategize/QUEUED and runs strategize
    plan: Plan = service.get_plan(plan_id)
    if plan.phase == PlanPhase.STRATEGIZE and plan.state in (
        ProcessingState.QUEUED,
        ProcessingState.PROCESSING,
    ):
        executor.run_strategize(plan_id)
        plan = service.get_plan(plan_id)

    # Step 2: Transition to Execute if needed
    if plan.phase == PlanPhase.STRATEGIZE and plan.state == ProcessingState.COMPLETE:
        plan = service.execute_plan(plan_id)
    elif plan.phase != PlanPhase.EXECUTE:
        _fail(
            f"Bug #967: Unexpected state after strategize: "
            f"{plan.phase.value}/{plan.state.value}"
        )

    # Step 3: Run execute phase
    plan = service.get_plan(plan_id)
    if plan.phase == PlanPhase.EXECUTE and plan.state == ProcessingState.QUEUED:
        executor.run_execute(plan_id)
        plan = service.get_plan(plan_id)

    if plan.phase != PlanPhase.EXECUTE:
        _fail(f"Bug #967: Expected Execute phase, got {plan.phase.value}")
    if plan.state not in (ProcessingState.COMPLETE, ProcessingState.QUEUED):
        _fail(f"Bug #967: Expected COMPLETE or QUEUED state, got {plan.state.value}")
    print("tdd-cli-full-orchestration-ok")


def _proper_orchestration() -> None:
    """Positive control: proper service-level orchestration works on a QUEUED plan."""
    service, plan_id = _create_service_and_queued_plan()
    executor: PlanExecutor = PlanExecutor(lifecycle_service=service)

    # Run strategize first (QUEUED → PROCESSING → COMPLETE)
    executor.run_strategize(plan_id)

    # Re-fetch — auto_progress may have moved it to Execute
    plan: Plan = service.get_plan(plan_id)
    if plan.phase == PlanPhase.STRATEGIZE and plan.state == ProcessingState.COMPLETE:
        plan = service.execute_plan(plan_id)
    elif plan.phase != PlanPhase.EXECUTE:
        _fail(
            f"Bug #967: Unexpected state after orchestration: "
            f"{plan.phase.value}/{plan.state.value}"
        )

    plan = service.get_plan(plan_id)
    if plan.phase != PlanPhase.EXECUTE:
        _fail(f"Bug #967: Expected Execute phase, got {plan.phase.value}")
    if plan.state != ProcessingState.QUEUED:
        _fail(f"Bug #967: Expected QUEUED state, got {plan.state.value}")
    print("tdd-proper-orchestration-ok")


def _cli_auto_discovery() -> None:
    """Test the CLI auto-discovery filter includes Strategize/QUEUED plans.

    Replicates the CLI auto-discovery logic from the ``execute_plan`` handler:
    list plans and filter for eligible states including QUEUED.
    """
    service: PlanLifecycleService = PlanLifecycleService(settings=Settings())

    # Create an action
    action = service.create_action(
        name="local/tdd-967-discovery",
        description="TDD action for auto-discovery (Robot)",
        definition_of_done="Test auto-discovery",
        strategy_actor="local/stub-strategize",
        execution_actor="local/stub-execute",
    )
    action_name: str = str(action.namespaced_name)

    # Plan 1: Strategize/QUEUED (fresh from use_action)
    plan_queued: Plan = service.use_action(action_name=action_name)
    queued_id: str = plan_queued.identity.plan_id

    # Apply the PRODUCTION auto-discovery filter (the fixed version):
    # includes both QUEUED and COMPLETE Strategize plans
    plans_strat: list[Plan] = service.list_plans(phase=PlanPhase.STRATEGIZE)
    plans_exec: list[Plan] = service.list_plans(phase=PlanPhase.EXECUTE)
    eligible: list[Plan] = [
        p
        for p in plans_strat
        if p.state in (ProcessingState.QUEUED, ProcessingState.COMPLETE)
    ] + [p for p in plans_exec if p.state == ProcessingState.QUEUED]

    queued_in_eligible: list[Plan] = [
        p for p in eligible if p.identity.plan_id == queued_id
    ]
    if len(queued_in_eligible) == 0:
        _fail(
            "Bug #967: Auto-discovery filter does not find Strategize/QUEUED "
            f"plans. Eligible count: {len(eligible)}, QUEUED plan: {queued_id}"
        )
    print("tdd-cli-auto-discovery-ok")


_COMMANDS: dict[str, Callable[[], None]] = {
    "cli-execute-from-queued": _cli_execute_from_queued,
    "cli-full-orchestration": _cli_full_orchestration,
    "proper-orchestration": _proper_orchestration,
    "cli-auto-discovery": _cli_auto_discovery,
}

if __name__ == "__main__":
    if len(sys.argv) < 2 or sys.argv[1] not in _COMMANDS:
        print(
            f"Usage: {sys.argv[0]} <{'|'.join(_COMMANDS)}>",
            file=sys.stderr,
        )
        sys.exit(1)
    cmd: Callable[[], None] = _COMMANDS[sys.argv[1]]
    cmd()