package com.zy.ai.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.zy.ai.domain.autotune.AutoTuneRuleSnapshotItem;
import com.zy.asrs.entity.BasDevp;
import com.zy.asrs.entity.BasStation;
import com.zy.asrs.entity.WrkMast;
import com.zy.asrs.service.BasDevpService;
import com.zy.asrs.service.BasStationService;
import com.zy.asrs.service.WrkMastService;
import com.zy.core.model.StationObjModel;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.ArgumentCaptor;
import org.springframework.test.util.ReflectionTestUtils;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

class AutoTuneSnapshotServiceImplTest {

    private AutoTuneSnapshotServiceImpl service;

    @BeforeEach
    void setUp() {
        service = new AutoTuneSnapshotServiceImpl();
    }

    @Test
    void buildStationOutTaskLimitMapPreservesNullZeroAndNegativeLimits() {
        Map<String, Integer> result = service.buildStationOutTaskLimitMap(Arrays.asList(
                station(101, null),
                station(102, 0),
                station(103, -1),
                station(104, 5)
        ));

        assertNull(result.get("101"));
        assertEquals(0, result.get("102"));
        assertEquals(-1, result.get("103"));
        assertEquals(5, result.get("104"));
    }

    @Test
    void buildStationOutBufferCapacityMapPreservesConfiguredCapacity() {
        Map<String, Integer> result = service.buildStationOutBufferCapacityMap(Arrays.asList(
                station(101, 1, null),
                station(102, 1, 0),
                station(103, 1, 3)
        ));

        assertNull(result.get("101"));
        assertEquals(0, result.get("102"));
        assertEquals(3, result.get("103"));
    }

    @Test
    void buildRuleSnapshotExposesStepRangeCooldownAndDynamicMaxSource() {
        List<AutoTuneRuleSnapshotItem> result = service.buildRuleSnapshot();

        AutoTuneRuleSnapshotItem stationOutTaskRule = findRule(result, "station", "outTaskLimit");
        assertEquals(0, stationOutTaskRule.getMinValue());
        assertNull(stationOutTaskRule.getMaxValue());
        assertEquals(3, stationOutTaskRule.getMaxStep());
        assertEquals(10, stationOutTaskRule.getCooldownMinutes());
        assertEquals(Boolean.TRUE, stationOutTaskRule.getDynamicMaxValue());
        assertEquals("currentParameterSnapshot.stationOutBufferCapacities[targetId]",
                stationOutTaskRule.getDynamicMaxSource());
        assertEquals("单次调整幅度不能超过 maxStep；增大时不得超过对应站点 outBufferCapacity。",
                stationOutTaskRule.getNote());

        AutoTuneRuleSnapshotItem crnMaxOutRule = findRule(result, "crn", "maxOutTask");
        assertEquals(3, crnMaxOutRule.getMaxStep());
        assertNull(crnMaxOutRule.getDynamicMaxSource());
        assertEquals("单次调整幅度不能超过 maxStep。", crnMaxOutRule.getNote());

        AutoTuneRuleSnapshotItem crnMaxInRule = findRule(result, "crn", "maxInTask");
        assertEquals(3, crnMaxInRule.getMaxStep());

        assertRuleMaxStep(result, "sys_config", "crnOutBatchRunningLimit", 3);
        assertRuleMaxStep(result, "dual_crn", "maxOutTask", 3);
        assertRuleMaxStep(result, "dual_crn", "maxInTask", 3);
    }

    @Test
    void loadActiveTasksIncludesNullWrkStatusInGroupedCondition() {
        WrkMastService wrkMastService = mock(WrkMastService.class);
        when(wrkMastService.list(any(Wrapper.class))).thenReturn(Collections.emptyList());
        ReflectionTestUtils.setField(service, "wrkMastService", wrkMastService);

        ReflectionTestUtils.invokeMethod(service, "loadActiveTasks");

        ArgumentCaptor<Wrapper<WrkMast>> wrapperCaptor = ArgumentCaptor.forClass(Wrapper.class);
        verify(wrkMastService).list(wrapperCaptor.capture());
        String sqlSegment = wrapperCaptor.getValue().getSqlSegment();
        String normalizedSqlSegment = sqlSegment.replaceAll("\\s+", " ");
        assertTrue(normalizedSqlSegment.contains("(wrk_sts NOT IN"));
        assertTrue(normalizedSqlSegment.contains("OR wrk_sts IS NULL"));
    }

    @Test
    void loadOutStationListOnlyQueriesBasDevpOutStations() {
        BasStationService basStationService = mock(BasStationService.class);
        BasDevpService basDevpService = mock(BasDevpService.class);
        ReflectionTestUtils.setField(service, "basStationService", basStationService);
        ReflectionTestUtils.setField(service, "basDevpService", basDevpService);
        when(basDevpService.list(any(Wrapper.class))).thenReturn(Arrays.asList(
                basDevp(1, 101, 102),
                basDevp(2, 102)
        ));
        when(basStationService.list(any(Wrapper.class))).thenReturn(Arrays.asList(
                station(101, 2),
                station(102, 3)
        ));

        java.util.List<BasStation> result = ReflectionTestUtils.invokeMethod(service, "loadOutStationList");

        assertEquals(2, result.size());
        assertEquals(101, result.get(0).getStationId());
        assertEquals(102, result.get(1).getStationId());

        ArgumentCaptor<Wrapper<BasDevp>> basDevpWrapperCaptor = ArgumentCaptor.forClass(Wrapper.class);
        verify(basDevpService).list(basDevpWrapperCaptor.capture());
        assertTrue(basDevpWrapperCaptor.getValue().getSqlSegment().contains("status ="));

        ArgumentCaptor<Wrapper<BasStation>> stationWrapperCaptor = ArgumentCaptor.forClass(Wrapper.class);
        verify(basStationService).list(stationWrapperCaptor.capture());
        assertTrue(stationWrapperCaptor.getValue().getSqlSegment().contains("station_id IN"));
    }

    @Test
    void loadOutStationListDoesNotQueryStationsWhenBasDevpOutStationsAreEmpty() {
        BasStationService basStationService = mock(BasStationService.class);
        BasDevpService basDevpService = mock(BasDevpService.class);
        ReflectionTestUtils.setField(service, "basStationService", basStationService);
        ReflectionTestUtils.setField(service, "basDevpService", basDevpService);
        when(basDevpService.list(any(Wrapper.class))).thenReturn(Collections.singletonList(basDevp(1)));

        java.util.List<BasStation> result = ReflectionTestUtils.invokeMethod(service, "loadOutStationList");

        assertTrue(result.isEmpty());
        verify(basStationService, never()).list(any(Wrapper.class));
    }

    private BasStation station(Integer stationId, Integer outTaskLimit) {
        return station(stationId, outTaskLimit, null);
    }

    private BasStation station(Integer stationId, Integer outTaskLimit, Integer outBufferCapacity) {
        BasStation station = new BasStation();
        station.setStationId(stationId);
        station.setOutTaskLimit(outTaskLimit);
        station.setOutBufferCapacity(outBufferCapacity);
        return station;
    }

    private BasDevp basDevp(Integer devpNo, Integer... stationIds) {
        BasDevp basDevp = new BasDevp();
        basDevp.setDevpNo(devpNo);
        basDevp.setStatus(1);
        if (stationIds == null || stationIds.length == 0) {
            return basDevp;
        }
        basDevp.setOutStationList(JSON.toJSONString(Arrays.stream(stationIds)
                .map(this::stationObjModel)
                .toList()));
        return basDevp;
    }

    private StationObjModel stationObjModel(Integer stationId) {
        StationObjModel stationObjModel = new StationObjModel();
        stationObjModel.setStationId(stationId);
        return stationObjModel;
    }

    private AutoTuneRuleSnapshotItem findRule(List<AutoTuneRuleSnapshotItem> rules,
                                              String targetType,
                                              String targetKey) {
        for (AutoTuneRuleSnapshotItem rule : rules) {
            if (targetType.equals(rule.getTargetType()) && targetKey.equals(rule.getTargetKey())) {
                return rule;
            }
        }
        throw new AssertionError("rule not found: " + targetType + "/" + targetKey);
    }

    private void assertRuleMaxStep(List<AutoTuneRuleSnapshotItem> rules,
                                   String targetType,
                                   String targetKey,
                                   int expectedMaxStep) {
        AutoTuneRuleSnapshotItem rule = findRule(rules, targetType, targetKey);
        assertEquals(expectedMaxStep, rule.getMaxStep());
    }
}