"""Slot transition event emission tests (REQ-021 + REQ-023 + REQ-018 hook)."""
from __future__ import annotations

import threading
import time
from trex_core.adapters.broker.paper import PaperBroker
from trex_core.adapters.ledger.in_memory import InMemoryLedger
from trex_core.adapters.messaging import topology
from trex_core.adapters.messaging.in_memory import InMemoryTransport
from trex_core.adapters.persistence.in_memory_intent_store import InMemoryIntentStore
from trex_core.application.execution import ExecutionService
from trex_core.application.intents import BuyIntent, IntentService
from trex_core.application.ledger_outbox import InMemoryLedgerOutbox, LedgerWriter
from trex_core.application.messaging_handlers import slot_transition_event_payload
from trex_core.domain.slot import SlotService, SlotState
from trex_core.domain.slot.in_memory_repository import InMemorySlotRepository



def _wire(transport):
    repo = InMemorySlotRepository()
    svc = SlotService(repo)
    intents = IntentService(svc, repo, InMemoryIntentStore(),
                            resolve_symbol=lambda pid: "005930")
    outbox = InMemoryLedgerOutbox()
    ledger = InMemoryLedger()
    writer = LedgerWriter(outbox, ledger)
    repo.reconcile_universe("default", {"PF-1": "SYM"})

    def emitter(event_type: str, slot) -> None:
        rk = topology.event_routing_key(event_type, slot.strategy_id or "_", slot.symbol or "_")
        payload = slot_transition_event_payload(slot, event_type=event_type)
        try:
            transport.publish_event(rk, payload)
        except Exception:  # noqa: BLE001
            pass

    execution = ExecutionService(svc, repo, PaperBroker(fill_after_polls=0),
                                 ledger_outbox=outbox, event_emitter=emitter)
    return repo, svc, intents, execution, writer


def test_fill_emits_slot_filled_event_with_routing_key_and_state():
    transport = InMemoryTransport()
    received: list[tuple[str, dict]] = []
    stop = threading.Event()
    th = threading.Thread(
        target=transport.consume_events_forever,
        args=("trex.events.strategy.A", topology.strategy_event_binding_pattern("A"),
              lambda rk, p: received.append((rk, p)), stop),
        daemon=True,
    )
    th.start()
    time.sleep(0.05)

    repo, _, intents, execution, _ = _wire(transport)
    intents.submit_buy(BuyIntent(
        intent_id="b1", qty=10, strategy_id="A", portfolio_id="PF-1",
    ))
    execution.run_once()
    time.sleep(0.05)
    stop.set()
    th.join(timeout=1.0)

    assert len(received) == 1
    rk, payload = received[0]
    assert rk == "slot_filled_buy.A.005930"
    # payload carries current state + monotonic sequence (REQ-023 AC-5)
    assert payload["event_type"] == "slot_filled_buy"
    assert payload["status"] == SlotState.HOLDING.value
    assert payload["strategy_id"] == "A"
    assert payload["symbol"] == "005930"
    assert "sequence_at" in payload  # last-wins ordering token


def test_event_for_strategy_a_does_not_reach_strategy_b_queue():
    """REQ-021 AC-4: per-strategy routing key binding filters at the broker."""
    transport = InMemoryTransport()
    received_a: list[tuple[str, dict]] = []
    received_b: list[tuple[str, dict]] = []
    stop = threading.Event()
    th_a = threading.Thread(
        target=transport.consume_events_forever,
        args=("q.A", topology.strategy_event_binding_pattern("A"),
              lambda rk, p: received_a.append((rk, p)), stop),
        daemon=True,
    )
    th_b = threading.Thread(
        target=transport.consume_events_forever,
        args=("q.B", topology.strategy_event_binding_pattern("B"),
              lambda rk, p: received_b.append((rk, p)), stop),
        daemon=True,
    )
    th_a.start()
    th_b.start()
    time.sleep(0.05)

    _, _, intents, execution, _ = _wire(transport)
    intents.submit_buy(BuyIntent(
        intent_id="b1", qty=10, strategy_id="A", portfolio_id="PF-1",
    ))
    execution.run_once()
    time.sleep(0.05)
    stop.set()
    th_a.join(timeout=1.0)
    th_b.join(timeout=1.0)

    assert any(rk == "slot_filled_buy.A.005930" for rk, _ in received_a)
    assert received_b == []


def test_publish_failure_does_not_break_execution_loop():
    """Publish errors must NOT roll back slot transitions or ledger enqueue."""
    transport = InMemoryTransport()
    transport.set_available(False)  # all publishes will raise TransportUnavailableError

    repo, _, intents, execution, _ = _wire(transport)
    intents.submit_buy(BuyIntent(
        intent_id="b1", qty=10, strategy_id="A", portfolio_id="PF-1",
    ))
    r = execution.run_once()
    # Slot still transitioned; ledger still enqueued.
    assert r.filled == 1
    assert r.ledger_enqueued == 1
    pending = [s for s in repo.list_slots("default") if s.status is SlotState.HOLDING]
    assert len(pending) == 1