package com.quantai.trader.replay;

import com.quantai.trader.artifact.TraderArtifactLoader;
import com.quantai.trader.domain.*;
import com.quantai.trader.enums.TraderActionType;
import com.quantai.trader.evidence.EvidenceAppender;
import com.quantai.trader.evidence.TraderEvidenceRepository;
import com.quantai.trader.model.ArtifactTraderModelService;
import com.quantai.trader.outbox.TraderOutboxEvent;
import com.quantai.trader.outbox.TraderOutboxRepository;
import com.quantai.trader.persistence.TraderDecisionTraceWriter;
import com.quantai.trader.position.TraderPositionManager;
import com.quantai.trader.replay.state.P0ReplayStateStore;
import com.quantai.trader.risk.TraderRiskGate;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.io.TempDir;

import java.util.ArrayList;
import java.util.List;
import java.io.IOException;
import java.math.BigDecimal;
import java.nio.file.Path;

import static com.quantai.trader.TestFixtures.*;
import static org.assertj.core.api.Assertions.assertThat;

class TraderP0CycleRunnerTest {
    @TempDir
    Path artifactRoot;

    @Test
    void runsReplayShadowCycleThroughModelPmRiskActionOutboxAndEvidence() throws IOException {
        writeArtifactBundle(artifactRoot);
        RecordingEvidenceRepository evidenceRepository = new RecordingEvidenceRepository();
        EvidenceAppender evidenceAppender = new EvidenceAppender(evidenceRepository);
        RecordingTraceWriter traceWriter = new RecordingTraceWriter();
        RecordingOutboxRepository outboxRepository = new RecordingOutboxRepository();
        var properties = propertiesWithArtifactRoot(artifactRoot);
        TraderP0CycleRunner runner = new TraderP0CycleRunner(
                properties,
                new TraderArtifactLoader(properties, objectMapper()),
                new ArtifactTraderModelService(),
                new TraderPositionManager(),
                new TraderRiskGate(),
                new TraderActionFactory(),
                evidenceAppender,
                traceWriter,
                outboxRepository,
                new P0ReplayStateStore(properties));

        TraderCycleResult result = runner.runCycle(new ReplayMarketEvent(
                "run-1", "BTC-USDT-PERP", T0, new BigDecimal("100"), new BigDecimal("99.5"),
                new BigDecimal("1.2"), new BigDecimal("1000")));

        assertThat(result.action().actionType()).isEqualTo(TraderActionType.OPEN_LONG);
        assertThat(result.action().reduceOnly()).isFalse();
        assertThat(traceWriter.actions()).containsExactly(result.action());
        assertThat(outboxRepository.events()).hasSize(1);
        assertThat(outboxRepository.events().getFirst().destination()).isEqualTo("SHADOW_RECORDER");
        assertThat(evidenceRepository.items()).extracting("stage")
                .containsExactly("MARKET_SNAPSHOT", "MODEL_OUTPUT", "PM_DECISION", "RISK_DECISION");
    }

    @Test
    void recordsWaitActionWhenReplaySnapshotHasNoLiquidity() throws IOException {
        writeArtifactBundle(artifactRoot);
        RecordingEvidenceRepository evidenceRepository = new RecordingEvidenceRepository();
        EvidenceAppender evidenceAppender = new EvidenceAppender(evidenceRepository);
        RecordingTraceWriter traceWriter = new RecordingTraceWriter();
        RecordingOutboxRepository outboxRepository = new RecordingOutboxRepository();
        var properties = propertiesWithArtifactRoot(artifactRoot);
        TraderP0CycleRunner runner = new TraderP0CycleRunner(
                properties,
                new TraderArtifactLoader(properties, objectMapper()),
                new ArtifactTraderModelService(),
                new TraderPositionManager(),
                new TraderRiskGate(),
                new TraderActionFactory(),
                evidenceAppender,
                traceWriter,
                outboxRepository,
                new P0ReplayStateStore(properties));

        TraderCycleResult result = runner.runCycle(new ReplayMarketEvent(
                "run-1", "BTC-USDT-PERP", T0.plusSeconds(60), new BigDecimal("100"), new BigDecimal("99.5"),
                new BigDecimal("1.2"), BigDecimal.ZERO));

        assertThat(result.action().actionType()).isEqualTo(TraderActionType.WAIT);
        assertThat(result.action().pricePlanId()).isNull();
        assertThat(traceWriter.actions()).containsExactly(result.action());
        assertThat(outboxRepository.events()).hasSize(1);
        assertThat(evidenceRepository.items()).hasSize(4);
    }

    @Test
    void laterCycleUsesPositionStateFromEarlierOpen() throws IOException {
        writeArtifactBundle(artifactRoot);
        RecordingEvidenceRepository evidenceRepository = new RecordingEvidenceRepository();
        EvidenceAppender evidenceAppender = new EvidenceAppender(evidenceRepository);
        RecordingTraceWriter traceWriter = new RecordingTraceWriter();
        RecordingOutboxRepository outboxRepository = new RecordingOutboxRepository();
        var properties = propertiesWithArtifactRoot(artifactRoot);
        TraderP0CycleRunner runner = new TraderP0CycleRunner(
                properties,
                new TraderArtifactLoader(properties, objectMapper()),
                new ArtifactTraderModelService(),
                new TraderPositionManager(),
                new TraderRiskGate(),
                new TraderActionFactory(),
                evidenceAppender,
                traceWriter,
                outboxRepository,
                new P0ReplayStateStore(properties));

        TraderCycleResult first = runner.runCycle(new ReplayMarketEvent(
                "run-state-1", "BTC-USDT-PERP", T0, new BigDecimal("100"), new BigDecimal("99.5"),
                new BigDecimal("1.2"), new BigDecimal("1000")));
        TraderCycleResult second = runner.runCycle(new ReplayMarketEvent(
                "run-state-1", "BTC-USDT-PERP", T0.plusSeconds(60), new BigDecimal("101"), new BigDecimal("100.5"),
                new BigDecimal("1.2"), new BigDecimal("1000")));

        assertThat(first.action().actionType()).isEqualTo(TraderActionType.OPEN_LONG);
        assertThat(second.action().actionType()).isEqualTo(TraderActionType.ADD_LONG);
        assertThat(traceWriter.positionStates()).extracting("side").containsExactly(
                com.quantai.trader.enums.PositionSide.NONE,
                com.quantai.trader.enums.PositionSide.LONG);
    }

    private static final class RecordingEvidenceRepository implements TraderEvidenceRepository {
        private final List<TraderEvidence> items = new ArrayList<>();

        @Override
        public void insert(TraderEvidence evidence) {
            items.add(evidence);
        }

        List<TraderEvidence> items() {
            return items;
        }
    }

    private static final class RecordingOutboxRepository implements TraderOutboxRepository {
        private final List<TraderOutboxEvent> events = new ArrayList<>();

        @Override
        public void insert(TraderOutboxEvent event) {
            events.add(event);
        }

        List<TraderOutboxEvent> events() {
            return events;
        }
    }

    private static final class RecordingTraceWriter implements TraderDecisionTraceWriter {
        private final List<TraderAction> actions = new ArrayList<>();
        private final List<TraderPositionState> positionStates = new ArrayList<>();

        @Override
        public void persistCycleTrace(TraderDecisionCycle cycle, TraderMarketSnapshot snapshot, TraderModelOutput modelOutput,
                                      TraderPositionState positionState, TraderPositionManagerDecision pmDecision,
                                      TraderRiskDecision riskDecision, TraderAction action) {
            actions.add(action);
            positionStates.add(positionState);
        }

        List<TraderAction> actions() {
            return actions;
        }

        List<TraderPositionState> positionStates() {
            return positionStates;
        }
    }
}