def test_config_risk_engine(self):
        # Arrange
        self.msgbus.deregister("RiskEngine.execute", self.risk_engine.execute)

        config = RiskEngineConfig(
            bypass=True,  # <-- bypassing pre-trade risk checks for backtest
            max_order_rate="5/00:00:01",
            max_notional_per_order={"GBP/USD.SIM": 2_000_000},
        )

        # Act
        risk_engine = RiskEngine(
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
            config=config,
        )

        # Assert
        assert risk_engine.max_order_rate() == (5, timedelta(seconds=1))
        assert risk_engine.max_notionals_per_order() == {
            GBPUSD_SIM.id: Decimal("2000000")
        }
        assert risk_engine.max_notional_per_order(GBPUSD_SIM.id) == 2_000_000
class TestRiskEngine:
    def setup(self):
        # Fixture Setup
        self.clock = TestClock()
        self.uuid_factory = UUIDFactory()
        self.logger = Logger(
            clock=self.clock,
            level_stdout=LogLevel.DEBUG,
        )

        self.trader_id = TestIdStubs.trader_id()
        self.account_id = TestIdStubs.account_id()
        self.venue = Venue("SIM")

        self.msgbus = MessageBus(
            trader_id=self.trader_id,
            clock=self.clock,
            logger=self.logger,
        )

        self.cache = TestComponentStubs.cache()

        self.portfolio = Portfolio(
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        config = ExecEngineConfig()
        config.allow_cash_positions = True  # Retain original behaviour for now
        self.exec_engine = ExecutionEngine(
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
            config=config,
        )

        self.risk_engine = RiskEngine(
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        self.exec_client = MockExecutionClient(
            client_id=ClientId(self.venue.value),
            venue=self.venue,
            account_type=AccountType.MARGIN,
            base_currency=USD,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )
        self.portfolio.update_account(TestEventStubs.margin_account_state())
        self.exec_engine.register_client(self.exec_client)

        # Prepare data
        self.cache.add_instrument(AUDUSD_SIM)

    def test_config_risk_engine(self):
        # Arrange
        self.msgbus.deregister("RiskEngine.execute", self.risk_engine.execute)

        config = RiskEngineConfig(
            bypass=True,  # <-- bypassing pre-trade risk checks for backtest
            max_order_rate="5/00:00:01",
            max_notional_per_order={"GBP/USD.SIM": 2_000_000},
        )

        # Act
        risk_engine = RiskEngine(
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
            config=config,
        )

        # Assert
        assert risk_engine.max_order_rate() == (5, timedelta(seconds=1))
        assert risk_engine.max_notionals_per_order() == {GBPUSD_SIM.id: Decimal("2000000")}
        assert risk_engine.max_notional_per_order(GBPUSD_SIM.id) == 2_000_000

    def test_risk_engine_on_stop(self):
        # Arrange, Act
        self.risk_engine.start()
        self.risk_engine.stop()

        # Assert
        assert self.risk_engine.is_stopped

    def test_process_event_then_handles(self):
        # Arrange
        event = Event(
            event_id=self.uuid_factory.generate(),
            ts_event=self.clock.timestamp_ns(),
            ts_init=self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.process(event)

        # Assert
        assert self.risk_engine.event_count == 1

    def test_trading_state_after_instantiation_returns_active(self):
        # Arrange, Act
        result = self.risk_engine.trading_state

        # Assert
        assert result == TradingState.ACTIVE

    def test_set_trading_state_when_no_change_logs_warning(self):
        # Arrange, Act
        self.risk_engine.set_trading_state(TradingState.ACTIVE)

        # Assert
        assert self.risk_engine.trading_state == TradingState.ACTIVE

    def test_set_trading_state_changes_value_and_publishes_event(self):
        # Arrange
        handler = []
        self.msgbus.subscribe(topic="events.risk*", handler=handler.append)

        # Act
        self.risk_engine.set_trading_state(TradingState.HALTED)

        # Assert
        assert type(handler[0]) == TradingStateChanged
        assert self.risk_engine.trading_state == TradingState.HALTED

    def test_max_order_rate_when_no_risk_config_returns_100_per_second(self):
        # Arrange, Act
        result = self.risk_engine.max_order_rate()

        assert result == (100, timedelta(seconds=1))

    def test_max_notionals_per_order_when_no_risk_config_returns_empty_dict(self):
        # Arrange, Act
        result = self.risk_engine.max_notionals_per_order()

        assert result == {}

    def test_max_notional_per_order_when_no_risk_config_returns_none(self):
        # Arrange, Act
        result = self.risk_engine.max_notional_per_order(AUDUSD_SIM.id)

        assert result is None

    def test_set_max_notional_per_order_changes_setting(self):
        # Arrange, Act
        self.risk_engine.set_max_notional_per_order(AUDUSD_SIM.id, 1_000_000)

        max_notionals = self.risk_engine.max_notionals_per_order()
        max_notional = self.risk_engine.max_notional_per_order(AUDUSD_SIM.id)

        # Assert
        assert max_notionals == {AUDUSD_SIM.id: Decimal("1000000")}
        assert max_notional == Decimal(1_000_000)

    def test_given_random_command_then_logs_and_continues(self):
        # Arrange
        random = TradingCommand(
            client_id=None,
            trader_id=self.trader_id,
            strategy_id=StrategyId("SCALPER-001"),
            instrument_id=AUDUSD_SIM.id,
            command_id=self.uuid_factory.generate(),
            ts_init=self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(random)

    def test_given_random_event_then_logs_and_continues(self):
        # Arrange
        random = Event(
            event_id=self.uuid_factory.generate(),
            ts_event=self.clock.timestamp_ns(),
            ts_init=self.clock.timestamp_ns(),
        )

        self.risk_engine.process(random)

    # -- SUBMIT ORDER TESTS ------------------------------------------------------------------------

    def test_submit_order_with_default_settings_then_sends_to_client(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        submit_order = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.exec_engine.command_count == 1
        assert self.exec_client.calls == ["_start", "submit_order"]

    def test_submit_order_when_duplicate_id_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        submit_order = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit_order)

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.exec_engine.command_count == 1
        assert self.exec_client.calls == ["_start", "submit_order"]

    def test_submit_order_when_risk_bypassed_sends_to_execution_engine(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        submit_order = SubmitOrder(
            trader_id=self.trader_id,
            strategy_id=strategy.id,
            position_id=None,
            order=order,
            command_id=self.uuid_factory.generate(),
            ts_init=self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.exec_engine.command_count == 1  # <-- initial account event
        assert self.exec_client.calls == ["_start", "submit_order"]

    def test_submit_order_when_position_already_closed_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order1 = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        order2 = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.SELL,
            Quantity.from_int(100000),
        )

        order3 = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        submit_order1 = SubmitOrder(
            trader_id=self.trader_id,
            strategy_id=strategy.id,
            position_id=None,
            order=order1,
            command_id=self.uuid_factory.generate(),
            ts_init=self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit_order1)
        self.exec_engine.process(TestEventStubs.order_submitted(order1))
        self.exec_engine.process(TestEventStubs.order_accepted(order1))
        self.exec_engine.process(TestEventStubs.order_filled(order1, AUDUSD_SIM))

        submit_order2 = SubmitOrder(
            trader_id=self.trader_id,
            strategy_id=strategy.id,
            position_id=PositionId("P-19700101-000000-000-000-1"),
            order=order2,
            command_id=self.uuid_factory.generate(),
            ts_init=self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit_order2)
        self.exec_engine.process(TestEventStubs.order_submitted(order2))
        self.exec_engine.process(TestEventStubs.order_accepted(order2))
        self.exec_engine.process(TestEventStubs.order_filled(order2, AUDUSD_SIM))

        submit_order3 = SubmitOrder(
            trader_id=self.trader_id,
            strategy_id=strategy.id,
            position_id=PositionId("P-19700101-000000-000-000-1"),
            order=order3,
            command_id=self.uuid_factory.generate(),
            ts_init=self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_order3)

        # Assert
        assert self.exec_engine.command_count == 2
        assert self.exec_client.calls == ["_start", "submit_order", "submit_order"]

    def test_submit_order_when_position_id_not_in_cache_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        submit_order = SubmitOrder(
            self.trader_id,
            strategy.id,
            PositionId("009"),  # <-- not in the cache
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.exec_engine.command_count == 0

    def test_submit_order_when_instrument_not_in_cache_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.market(
            GBPUSD_SIM.id,  # <-- not in the cache
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        submit_order = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.exec_engine.command_count == 0  # <-- command never reaches engine

    def test_submit_order_when_invalid_price_precision_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.limit(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("0.9999999999999999"),  # <- invalid price
        )

        submit_order = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.exec_engine.command_count == 0  # <-- command never reaches engine

    def test_submit_order_when_invalid_negative_price_and_not_option_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.limit(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("-1.0"),  # <- invalid price
        )

        submit_order = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.exec_engine.command_count == 0  # <-- command never reaches engine

    def test_submit_order_when_invalid_trigger_price_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.stop_limit(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("1.00000"),
            Price.from_str("0.999999999999999"),  # <- invalid trigger
        )

        submit_order = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.exec_engine.command_count == 0  # <-- command never reaches engine

    def test_submit_order_when_invalid_quantity_precision_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.limit(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_str("1.111111111111111111"),  # <- invalid quantity
            Price.from_str("1.00000"),
        )

        submit_order = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.exec_engine.command_count == 0  # <-- command never reaches engine

    def test_submit_order_when_invalid_quantity_exceeds_maximum_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.limit(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(1_000_000_000),  # <- invalid quantity fat finger!
            Price.from_str("1.00000"),
        )

        submit_order = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.exec_engine.command_count == 0  # <-- command never reaches engine

    def test_submit_order_when_invalid_quantity_less_than_minimum_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.limit(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(1),  # <- invalid quantity
            Price.from_str("1.00000"),
        )

        submit_order = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.exec_engine.command_count == 0  # <-- command never reaches engine

    def test_submit_order_when_market_order_and_no_market_then_logs_warning(self):
        # Arrange
        self.risk_engine.set_max_notional_per_order(AUDUSD_SIM.id, 1_000_000)

        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(10000000),
        )

        submit_order = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.exec_engine.command_count == 1  # <-- command reaches engine with warning

    def test_submit_order_when_market_order_and_over_max_notional_then_denies(self):
        # Arrange
        self.risk_engine.set_max_notional_per_order(AUDUSD_SIM.id, 1_000_000)

        # Initialize market
        quote = TestDataStubs.quote_tick_5decimal(AUDUSD_SIM.id)
        self.cache.add_quote_tick(quote)

        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(10000000),
        )

        submit_order = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.exec_engine.command_count == 0  # <-- command never reaches engine

    def test_submit_order_when_reducing_and_buy_order_adds_then_denies(self):
        # Arrange
        self.risk_engine.set_max_notional_per_order(AUDUSD_SIM.id, 1_000_000)

        # Initialize market
        quote = TestDataStubs.quote_tick_5decimal(AUDUSD_SIM.id)
        self.cache.add_quote_tick(quote)

        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order1 = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        submit_order1 = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order1,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit_order1)
        self.risk_engine.set_trading_state(TradingState.REDUCING)  # <-- allow reducing orders only

        order2 = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        submit_order2 = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order2,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.exec_engine.process(TestEventStubs.order_submitted(order1))
        self.exec_engine.process(TestEventStubs.order_accepted(order1))
        self.exec_engine.process(TestEventStubs.order_filled(order1, AUDUSD_SIM))

        # Act
        self.risk_engine.execute(submit_order2)

        # Assert
        assert self.portfolio.is_net_long(AUDUSD_SIM.id)
        assert self.exec_engine.command_count == 1  # <-- command never reaches engine

    def test_submit_order_when_reducing_and_sell_order_adds_then_denies(self):
        # Arrange
        self.risk_engine.set_max_notional_per_order(AUDUSD_SIM.id, 1_000_000)

        # Initialize market
        quote = TestDataStubs.quote_tick_5decimal(AUDUSD_SIM.id)
        self.cache.add_quote_tick(quote)

        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order1 = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.SELL,
            Quantity.from_int(100000),
        )

        submit_order1 = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order1,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit_order1)
        self.risk_engine.set_trading_state(TradingState.REDUCING)  # <-- allow reducing orders only

        order2 = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.SELL,
            Quantity.from_int(100000),
        )

        submit_order2 = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order2,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.exec_engine.process(TestEventStubs.order_submitted(order1))
        self.exec_engine.process(TestEventStubs.order_accepted(order1))
        self.exec_engine.process(TestEventStubs.order_filled(order1, AUDUSD_SIM))

        # Act
        self.risk_engine.execute(submit_order2)

        # Assert
        assert self.portfolio.is_net_short(AUDUSD_SIM.id)
        assert self.exec_engine.command_count == 1  # <-- command never reaches engine

    def test_submit_order_when_trading_halted_then_denies_order(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        submit_order = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Halt trading
        self.risk_engine.set_trading_state(TradingState.HALTED)

        # Act
        self.risk_engine.execute(submit_order)

        # Assert
        assert self.risk_engine.command_count == 1  # <-- command never reaches engine

    def test_submit_order_list_when_trading_halted_then_denies_orders(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        entry = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        stop_loss = strategy.order_factory.stop_market(  # <-- duplicate
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("1.00000"),
        )

        take_profit = strategy.order_factory.limit(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("1.10000"),
        )

        bracket = OrderList(
            list_id=OrderListId("1"),
            orders=[entry, stop_loss, take_profit],
        )

        submit_bracket = SubmitOrderList(
            self.trader_id,
            strategy.id,
            bracket,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Halt trading
        self.risk_engine.set_trading_state(TradingState.HALTED)

        # Act
        self.risk_engine.execute(submit_bracket)

        # Assert
        assert self.risk_engine.command_count == 1  # <-- command never reaches engine

    # -- SUBMIT BRACKET ORDER TESTS ----------------------------------------------------------------

    def test_submit_bracket_with_default_settings_sends_to_client(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        bracket = strategy.order_factory.bracket_market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            stop_loss=Price.from_str("1.00000"),
            take_profit=Price.from_str("1.00010"),
        )

        submit_bracket = SubmitOrderList(
            self.trader_id,
            strategy.id,
            bracket,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_bracket)

        # Assert
        assert self.exec_engine.command_count == 1
        assert self.exec_client.calls == ["_start", "submit_order_list"]

    def test_submit_bracket_order_with_duplicate_entry_id_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        bracket = strategy.order_factory.bracket_market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            stop_loss=Price.from_str("1.00000"),
            take_profit=Price.from_str("1.00010"),
        )

        submit_bracket = SubmitOrderList(
            self.trader_id,
            strategy.id,
            bracket,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit_bracket)

        # Act
        self.risk_engine.execute(submit_bracket)

        # Assert
        assert self.exec_engine.command_count == 1  # <-- command never reaches engine

    def test_submit_bracket_order_with_duplicate_stop_loss_id_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        entry1 = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        stop_loss = strategy.order_factory.stop_market(  # <-- duplicate
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("1.00000"),
        )

        take_profit1 = strategy.order_factory.limit(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("1.10000"),
        )

        entry2 = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        take_profit2 = strategy.order_factory.limit(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("1.10000"),
        )

        bracket1 = OrderList(
            list_id=OrderListId("1"),
            orders=[entry1, stop_loss, take_profit1],
        )

        bracket2 = OrderList(
            list_id=OrderListId("1"),
            orders=[entry2, stop_loss, take_profit2],
        )

        submit_bracket1 = SubmitOrderList(
            self.trader_id,
            strategy.id,
            bracket1,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        submit_bracket2 = SubmitOrderList(
            self.trader_id,
            strategy.id,
            bracket2,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit_bracket1)

        # Act
        self.risk_engine.execute(submit_bracket2)

        # Assert
        assert self.exec_engine.command_count == 1  # <-- command never reaches engine

    def test_submit_bracket_order_with_duplicate_take_profit_id_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        entry1 = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        stop_loss1 = strategy.order_factory.stop_market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("1.00000"),
        )

        take_profit = strategy.order_factory.limit(  # <-- duplicate
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("1.10000"),
        )

        entry2 = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        stop_loss2 = strategy.order_factory.stop_market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("1.00000"),
        )

        bracket1 = OrderList(
            list_id=OrderListId("1"),
            orders=[entry1, stop_loss1, take_profit],
        )

        bracket2 = OrderList(
            list_id=OrderListId("1"),
            orders=[entry2, stop_loss2, take_profit],
        )

        submit_bracket1 = SubmitOrderList(
            self.trader_id,
            strategy.id,
            bracket1,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        submit_bracket2 = SubmitOrderList(
            self.trader_id,
            strategy.id,
            bracket2,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit_bracket1)

        # Act
        self.risk_engine.execute(submit_bracket2)

        # Assert
        assert self.exec_engine.command_count == 1  # <-- command never reaches engine

    def test_submit_bracket_order_when_instrument_not_in_cache_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        bracket = strategy.order_factory.bracket_market(
            GBPUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            stop_loss=Price.from_str("1.00000"),
            take_profit=Price.from_str("1.00010"),
        )

        submit_bracket = SubmitOrderList(
            self.trader_id,
            strategy.id,
            bracket,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(submit_bracket)

        # Assert
        assert self.exec_engine.command_count == 0  # <-- command never reaches engine

    # -- UPDATE ORDER TESTS ------------------------------------------------------------------------

    def test_update_order_when_no_order_found_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        modify = ModifyOrder(
            self.trader_id,
            strategy.id,
            AUDUSD_SIM.id,
            ClientOrderId("invalid"),
            VenueOrderId("1"),
            Quantity.from_int(100000),
            Price.from_str("1.00010"),
            None,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(modify)

        # Assert
        assert self.exec_client.calls == ["_start"]
        assert self.risk_engine.command_count == 1
        assert self.exec_engine.command_count == 0

    def test_update_order_when_already_closed_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.stop_market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("1.00010"),
        )

        submit = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit)

        self.exec_engine.process(TestEventStubs.order_submitted(order))
        self.exec_engine.process(TestEventStubs.order_accepted(order))
        self.exec_engine.process(TestEventStubs.order_filled(order, AUDUSD_SIM))

        modify = ModifyOrder(
            self.trader_id,
            strategy.id,
            order.instrument_id,
            order.client_order_id,
            VenueOrderId("1"),
            order.quantity,
            Price.from_str("1.00010"),
            None,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(modify)

        # Assert
        assert self.exec_client.calls == ["_start", "submit_order"]
        assert self.risk_engine.command_count == 2
        assert self.exec_engine.command_count == 1

    def test_update_order_when_in_flight_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.stop_market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("1.00010"),
        )

        submit = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit)

        self.exec_engine.process(TestEventStubs.order_submitted(order))

        modify = ModifyOrder(
            self.trader_id,
            strategy.id,
            order.instrument_id,
            order.client_order_id,
            VenueOrderId("1"),
            order.quantity,
            Price.from_str("1.00010"),
            None,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(modify)

        # Assert
        assert self.exec_client.calls == ["_start", "submit_order"]
        assert self.risk_engine.command_count == 2
        assert self.exec_engine.command_count == 1

    def test_modify_order_with_default_settings_then_sends_to_client(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.stop_market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
            Price.from_str("1.00010"),
        )

        submit = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        modify = ModifyOrder(
            self.trader_id,
            strategy.id,
            order.instrument_id,
            order.client_order_id,
            VenueOrderId("1"),
            order.quantity,
            Price.from_str("1.00010"),
            None,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit)

        # Act
        self.risk_engine.execute(modify)

        # Assert
        assert self.exec_client.calls == ["_start", "submit_order", "modify_order"]
        assert self.risk_engine.command_count == 2
        assert self.exec_engine.command_count == 2

    # -- CANCEL ORDER TESTS ------------------------------------------------------------------------

    def test_cancel_order_when_order_does_not_exist_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        cancel = CancelOrder(
            self.trader_id,
            strategy.id,
            AUDUSD_SIM.id,
            ClientOrderId("1"),
            VenueOrderId("1"),
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(cancel)

        # Assert
        assert self.exec_client.calls == ["_start"]
        assert self.risk_engine.command_count == 1
        assert self.exec_engine.command_count == 0

    def test_cancel_order_when_already_closed_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        submit = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit)
        self.exec_engine.process(TestEventStubs.order_submitted(order))
        self.exec_engine.process(TestEventStubs.order_rejected(order))

        cancel = CancelOrder(
            self.trader_id,
            strategy.id,
            order.instrument_id,
            order.client_order_id,
            VenueOrderId("1"),
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        # Act
        self.risk_engine.execute(cancel)

        # Assert
        assert self.exec_client.calls == ["_start", "submit_order"]
        assert self.risk_engine.command_count == 2
        assert self.exec_engine.command_count == 1

    def test_cancel_order_when_already_pending_cancel_then_denies(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        submit = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        cancel = CancelOrder(
            self.trader_id,
            strategy.id,
            order.instrument_id,
            order.client_order_id,
            VenueOrderId("1"),
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit)
        self.exec_engine.process(TestEventStubs.order_submitted(order))
        self.exec_engine.process(TestEventStubs.order_accepted(order))

        self.risk_engine.execute(cancel)
        self.exec_engine.process(TestEventStubs.order_pending_cancel(order))

        # Act
        self.risk_engine.execute(cancel)

        # Assert
        assert self.exec_client.calls == ["_start", "submit_order", "cancel_order"]
        assert self.risk_engine.command_count == 3
        assert self.exec_engine.command_count == 2

    def test_cancel_order_with_default_settings_then_sends_to_client(self):
        # Arrange
        self.exec_engine.start()

        strategy = TradingStrategy()
        strategy.register(
            trader_id=self.trader_id,
            portfolio=self.portfolio,
            msgbus=self.msgbus,
            cache=self.cache,
            clock=self.clock,
            logger=self.logger,
        )

        order = strategy.order_factory.market(
            AUDUSD_SIM.id,
            OrderSide.BUY,
            Quantity.from_int(100000),
        )

        submit = SubmitOrder(
            self.trader_id,
            strategy.id,
            None,
            order,
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        cancel = CancelOrder(
            self.trader_id,
            strategy.id,
            order.instrument_id,
            order.client_order_id,
            VenueOrderId("1"),
            self.uuid_factory.generate(),
            self.clock.timestamp_ns(),
        )

        self.risk_engine.execute(submit)

        # Act
        self.risk_engine.execute(cancel)

        # Assert
        assert self.exec_client.calls == ["_start", "submit_order", "cancel_order"]
        assert self.risk_engine.command_count == 2
        assert self.exec_engine.command_count == 2