package com.baiyue.warehouse.service;

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baiyue.common.core.exception.BizException;
import com.baiyue.warehouse.dto.LocationRequests;
import com.baiyue.warehouse.dto.PalletRequests;
import com.baiyue.warehouse.entity.WarehouseLocationEntity;
import com.baiyue.warehouse.entity.WarehousePalletEntity;
import com.baiyue.warehouse.dto.SharedWarehouseReference;
import com.baiyue.warehouse.repository.WarehouseResourceRepository;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.ArgumentCaptor;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;
import org.springframework.test.util.ReflectionTestUtils;

import java.math.BigDecimal;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

@ExtendWith(MockitoExtension.class)
class WarehouseResourceServiceTest {
    private static final long TENANT = 10001L;
    private static final long WAREHOUSE = 20001L;

    @Mock
    private WarehouseResourceRepository repository;
    @Mock
    private DomesticWarehouseDirectory warehouseDirectory;

    private WarehouseResourceService service;

    @BeforeEach
    void setUp() {
        service = new WarehouseResourceService();
        ReflectionTestUtils.setField(service, "repository", repository);
        ReflectionTestUtils.setField(service, "warehouseDirectory", warehouseDirectory);
        org.mockito.Mockito.lenient().when(warehouseDirectory.required(WAREHOUSE))
            .thenReturn(warehouse());
    }

    @Test
    void resourceIdsUseMybatisSnowflakeAssignment() throws NoSuchFieldException {
        assertThat(WarehouseLocationEntity.class.getDeclaredField("id").getAnnotation(TableId.class).type())
            .isEqualTo(IdType.ASSIGN_ID);
        assertThat(WarehousePalletEntity.class.getDeclaredField("id").getAnnotation(TableId.class).type())
            .isEqualTo(IdType.ASSIGN_ID);
    }

    @Test
    void resolvesOnlyPublicLocationInsideBoundWarehouse() {
        WarehouseLocationEntity location = new WarehouseLocationEntity(); location.setId(30001L);
        location.setWarehouseId(WAREHOUSE); location.setCustomerId(0L); location.setLocationCode("A-01");
        location.setLocationType("STORAGE"); location.setMaxLoadKg(new BigDecimal("1000")); location.setStatus("IDLE");
        when(repository.findLocationByCode(0L, WAREHOUSE, "A-01")).thenReturn(location);

        var result = service.resolvePublicLocation(WAREHOUSE, " A-01 ");

        assertThat(result.locationId()).isEqualTo(30001L);
        assertThat(result.locationCode()).isEqualTo("A-01");
    }

    @Test
    void createsLocationWithSnowflakeAssignedByMapper() {
        doAnswer(invocation -> {
            ((WarehouseLocationEntity) invocation.getArgument(0)).setId(2089000000000000001L);
            return null;
        }).when(repository).insertLocation(org.mockito.ArgumentMatchers.any());

        Long id = service.createLocation(TENANT, WAREHOUSE, locationRequest("A-01"));

        assertThat(id).isEqualTo(2089000000000000001L);
        ArgumentCaptor<WarehouseLocationEntity> captor = ArgumentCaptor.forClass(WarehouseLocationEntity.class);
        verify(repository).insertLocation(captor.capture());
        assertThat(captor.getValue().getCustomerId()).isEqualTo(TENANT);
        assertThat(captor.getValue().getWarehouseId()).isEqualTo(WAREHOUSE);
    }

    @Test
    void platformPalletUsesPublicScopeAgainstAnyExistingWarehouse() {
        WarehouseLocationEntity location = new WarehouseLocationEntity();
        location.setId(30001L);
        when(repository.findLocation(0L, WAREHOUSE, 30001L)).thenReturn(location);

        service.createPallet(0L, WAREHOUSE, new PalletRequests.SaveRequest(
            "PLT-PUBLIC", "STANDARD", null, BigDecimal.ONE, "IDLE", 30001L, null));

        ArgumentCaptor<WarehousePalletEntity> captor = ArgumentCaptor.forClass(WarehousePalletEntity.class);
        verify(repository).insertPallet(captor.capture());
        assertThat(captor.getValue().getCustomerId()).isZero();
        assertThat(captor.getValue().getWarehouseId()).isEqualTo(WAREHOUSE);
    }

    @Test
    void rejectsResourceAccessWhenWarehouseDoesNotBelongToTenant() {
        when(warehouseDirectory.required(WAREHOUSE)).thenThrow(new BizException(
            com.baiyue.common.core.api.ResultCode.NOT_FOUND, "仓库不存在"));

        assertThatThrownBy(() -> service.createLocation(TENANT, WAREHOUSE, locationRequest("A-01")))
            .isInstanceOf(BizException.class)
            .hasMessageContaining("仓库不存在");
        verify(repository, never()).insertLocation(org.mockito.ArgumentMatchers.any());
    }

    @Test
    void rejectsDuplicateLocationCodeWithinWarehouse() {
        when(repository.locationCodeExists(TENANT, WAREHOUSE, "A-01", null)).thenReturn(true);

        assertThatThrownBy(() -> service.createLocation(TENANT, WAREHOUSE, locationRequest("A-01")))
            .isInstanceOf(BizException.class)
            .hasMessageContaining("库位编码已存在");
    }

    @Test
    void palletDefaultsToTwoCubicMetresAndBindsOwnedLocation() {
        WarehouseLocationEntity location = new WarehouseLocationEntity();
        location.setId(30001L);
        when(repository.findLocation(TENANT, WAREHOUSE, 30001L)).thenReturn(location);
        doAnswer(invocation -> {
            ((WarehousePalletEntity) invocation.getArgument(0)).setId(2089000000000000002L);
            return null;
        }).when(repository).insertPallet(org.mockito.ArgumentMatchers.any());

        Long id = service.createPallet(TENANT, WAREHOUSE,
            new PalletRequests.SaveRequest("PLT-01", "STANDARD", null,
                new BigDecimal("12.50"), "IDLE", 30001L, null));

        assertThat(id).isEqualTo(2089000000000000002L);
        ArgumentCaptor<WarehousePalletEntity> captor = ArgumentCaptor.forClass(WarehousePalletEntity.class);
        verify(repository).insertPallet(captor.capture());
        assertThat(captor.getValue().getCapacityCbm()).isEqualByComparingTo("2.0000");
        assertThat(captor.getValue().getLocationId()).isEqualTo(30001L);
    }

    @Test
    void rejectsLocationFromAnotherWarehouseWhenBindingPallet() {
        when(repository.findLocation(TENANT, WAREHOUSE, 30002L)).thenReturn(null);

        assertThatThrownBy(() -> service.createPallet(TENANT, WAREHOUSE,
            new PalletRequests.SaveRequest("PLT-01", "STANDARD", null,
                BigDecimal.ONE, "IDLE", 30002L, null)))
            .isInstanceOf(BizException.class)
            .hasMessageContaining("库位不存在");
        verify(repository, never()).insertPallet(org.mockito.ArgumentMatchers.any());
    }

    @Test
    void preventsDeletingLocationThatStillHasPallets() {
        when(repository.findLocation(TENANT, WAREHOUSE, 30001L)).thenReturn(new WarehouseLocationEntity());
        when(repository.locationHasPallets(TENANT, WAREHOUSE, 30001L)).thenReturn(true);

        assertThatThrownBy(() -> service.deleteLocation(TENANT, WAREHOUSE, 30001L))
            .isInstanceOf(BizException.class)
            .hasMessageContaining("仍绑定托盘");
        verify(repository, never()).deleteLocation(30001L);
    }

    @Test
    void preventsDeletingOccupiedPallet() {
        WarehousePalletEntity pallet = new WarehousePalletEntity();
        pallet.setStatus("OCCUPIED");
        when(repository.findPallet(TENANT, WAREHOUSE, 40001L)).thenReturn(pallet);

        assertThatThrownBy(() -> service.deletePallet(TENANT, WAREHOUSE, 40001L))
            .isInstanceOf(BizException.class)
            .hasMessageContaining("占用中的托盘");
        verify(repository, never()).deletePallet(40001L);
    }

    @Test
    void preventsDeletingScrappedPalletSoItsIdentityCannotBeReused() {
        WarehousePalletEntity pallet = new WarehousePalletEntity();
        pallet.setStatus("SCRAPPED");
        when(repository.findPallet(TENANT, WAREHOUSE, 40003L)).thenReturn(pallet);

        assertThatThrownBy(() -> service.deletePallet(TENANT, WAREHOUSE, 40003L))
            .isInstanceOf(BizException.class)
            .hasMessageContaining("cannot be reused");
        verify(repository, never()).deletePallet(40003L);
    }

    @Test
    void rejectsUnknownPalletStatus() {

        assertThatThrownBy(() -> service.createPallet(TENANT, WAREHOUSE,
            new PalletRequests.SaveRequest("PLT-01", "STANDARD", null,
                BigDecimal.ONE, "BROKEN", null, null)))
            .isInstanceOf(BizException.class)
            .hasMessageContaining("IDLE、OCCUPIED、SCRAPPED");
    }

    private static LocationRequests.SaveRequest locationRequest(String code) {
        return new LocationRequests.SaveRequest("A", code, "STORAGE",
            new BigDecimal("1000.000"), "ACTIVE", null);
    }

    @Test
    void generatesRestartSafePalletCodeAndUsesDefaultVirtualLocation() {
        WarehouseLocationEntity location = new WarehouseLocationEntity();
        location.setId(30003L);
        location.setLocationType("VIRTUAL");
        location.setStatus("ACTIVE");
        when(repository.findLocationByCode(TENANT, WAREHOUSE, "LOC-US-LAX-01-DEFAULT"))
            .thenReturn(location);
        when(repository.findLocation(TENANT, WAREHOUSE, 30003L)).thenReturn(location);

        service.createPallet(TENANT, WAREHOUSE,
            new PalletRequests.SaveRequest(null, "STANDARD", null, BigDecimal.ONE, "IDLE", null, null));

        ArgumentCaptor<WarehousePalletEntity> captor = ArgumentCaptor.forClass(WarehousePalletEntity.class);
        verify(repository).insertPallet(captor.capture());
        assertThat(captor.getValue().getPalletCode()).matches("PLT-US-LAX-01-[0-9]{8}-[0-9]+");
        assertThat(captor.getValue().getLocationId()).isEqualTo(30003L);
        assertThat(captor.getValue().getId()).isNotNull();
    }

    @Test
    void defaultVirtualLocationIsInsertedIdempotentlyForAnExistingWarehouse() {
        WarehouseLocationEntity resolved = new WarehouseLocationEntity();
        resolved.setId(30004L);
        resolved.setLocationType("VIRTUAL");
        resolved.setStatus("ACTIVE");
        when(repository.findLocationByCode(TENANT, WAREHOUSE, "LOC-US-LAX-01-DEFAULT"))
            .thenReturn(null, resolved);

        WarehouseLocationEntity result = service.ensureDefaultVirtualLocation(TENANT, WAREHOUSE);

        assertThat(result.getId()).isEqualTo(30004L);
        ArgumentCaptor<WarehouseLocationEntity> location = ArgumentCaptor.forClass(WarehouseLocationEntity.class);
        verify(repository).insertDefaultVirtualLocationIgnore(location.capture());
        assertThat(location.getValue().getLocationCode()).isEqualTo("LOC-US-LAX-01-DEFAULT");
        assertThat(location.getValue().getLocationType()).isEqualTo("VIRTUAL");
        assertThat(location.getValue().getStatus()).isEqualTo("ACTIVE");
    }

    @Test
    void rejectsAConflictingDefaultLocationCode() {
        WarehouseLocationEntity conflict = new WarehouseLocationEntity();
        conflict.setLocationType("STORAGE");
        conflict.setStatus("ACTIVE");
        when(repository.findLocationByCode(TENANT, WAREHOUSE, "LOC-US-LAX-01-DEFAULT"))
            .thenReturn(conflict);

        assertThatThrownBy(() -> service.ensureDefaultVirtualLocation(TENANT, WAREHOUSE))
            .isInstanceOf(BizException.class)
            .hasMessageContaining("Default virtual location code");
        verify(repository, never()).insertDefaultVirtualLocationIgnore(org.mockito.ArgumentMatchers.any());
    }

    @Test
    void scrappedPalletCannotBeReactivated() {
        WarehousePalletEntity existing = new WarehousePalletEntity();
        existing.setId(40002L);
        existing.setPalletCode("PLT-OLD");
        existing.setStatus("SCRAPPED");
        existing.setVersion(0);
        when(repository.findPallet(TENANT, WAREHOUSE, 40002L)).thenReturn(existing);

        assertThatThrownBy(() -> service.updatePallet(TENANT, WAREHOUSE, 40002L,
            new PalletRequests.SaveRequest(null, "STANDARD", null, BigDecimal.ONE, "IDLE", null, null, null, 0)))
            .isInstanceOf(BizException.class)
            .hasMessageContaining("cannot be reused");
    }

    @Test
    void updatePalletChangesCodeAndFbaWarehouseCode() {
        WarehousePalletEntity existing = new WarehousePalletEntity();
        existing.setId(40003L);
        existing.setPalletCode("PLT-OLD");
        existing.setStatus("IDLE");
        existing.setVersion(2);
        when(repository.findPallet(TENANT, WAREHOUSE, 40003L)).thenReturn(existing);
        when(repository.updatePallet(org.mockito.ArgumentMatchers.any())).thenReturn(1);

        service.updatePallet(TENANT, WAREHOUSE, 40003L,
            new PalletRequests.SaveRequest("PLT-NEW", "WOOD", new BigDecimal("2.5000"),
                new BigDecimal("25.00"), "IDLE", null, "updated", "ONT8", 2));

        ArgumentCaptor<WarehousePalletEntity> captor = ArgumentCaptor.forClass(WarehousePalletEntity.class);
        verify(repository).palletCodeExists(TENANT, WAREHOUSE, "PLT-NEW", 40003L);
        verify(repository).updatePallet(captor.capture());
        assertThat(captor.getValue().getPalletCode()).isEqualTo("PLT-NEW");
        assertThat(captor.getValue().getFbaWarehouseCode()).isEqualTo("ONT8");
        assertThat(captor.getValue().getVersion()).isEqualTo(2);
    }

    @Test
    void updatePalletRejectsDuplicateCodeInSameWarehouse() {
        WarehousePalletEntity existing = new WarehousePalletEntity();
        existing.setId(40004L);
        existing.setPalletCode("PLT-OLD");
        existing.setStatus("IDLE");
        existing.setVersion(0);
        when(repository.findPallet(TENANT, WAREHOUSE, 40004L)).thenReturn(existing);
        when(repository.palletCodeExists(TENANT, WAREHOUSE, "PLT-DUP", 40004L)).thenReturn(true);

        assertThatThrownBy(() -> service.updatePallet(TENANT, WAREHOUSE, 40004L,
            new PalletRequests.SaveRequest("PLT-DUP", "WOOD", BigDecimal.ONE,
                BigDecimal.ONE, "IDLE", null, null, "ONT8", 0)))
            .isInstanceOf(BizException.class)
            .hasMessageContaining("托盘编码已存在");
        verify(repository, never()).updatePallet(org.mockito.ArgumentMatchers.any());
    }

    @Test
    void updatePalletRejectsStaleVersionBeforeMutation() {
        WarehousePalletEntity existing = new WarehousePalletEntity();
        existing.setId(40005L);
        existing.setPalletCode("PLT-OLD");
        existing.setStatus("IDLE");
        existing.setVersion(3);
        when(repository.findPallet(TENANT, WAREHOUSE, 40005L)).thenReturn(existing);

        assertThatThrownBy(() -> service.updatePallet(TENANT, WAREHOUSE, 40005L,
            new PalletRequests.SaveRequest("PLT-STALE", "WOOD", BigDecimal.ONE,
                BigDecimal.ONE, "IDLE", null, null, "ONT8", 2)))
            .isInstanceOf(BizException.class)
            .hasMessageContaining("版本已变化");
        verify(repository, never()).palletCodeExists(org.mockito.ArgumentMatchers.anyLong(),
            org.mockito.ArgumentMatchers.anyLong(), org.mockito.ArgumentMatchers.anyString(),
            org.mockito.ArgumentMatchers.any());
        verify(repository, never()).updatePallet(org.mockito.ArgumentMatchers.any());
    }

    private static SharedWarehouseReference warehouse() {
        return new SharedWarehouseReference(WAREHOUSE, "US-LAX-01", "Los Angeles", "ACTIVE");
    }
}