package com.ruoyi.system.service.impl;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import java.math.BigDecimal;
import java.time.Instant;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.function.Function;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.device.api.DeviceAdapter;
import com.ruoyi.device.api.DeviceAdapterException;
import com.ruoyi.device.model.ChannelIdentity;
import com.ruoyi.device.model.DetectedChannel;
import com.ruoyi.device.model.DeviceWorkStatus;
import com.ruoyi.device.model.RealtimeSnapshot;
import com.ruoyi.device.registry.DeviceAdapterRegistry;
import com.ruoyi.system.domain.TDetectionCabinet;
import com.ruoyi.system.domain.TDetectionChannel;
import com.ruoyi.system.domain.TDeviceAdapter;
import com.ruoyi.system.mapper.TDeviceAdapterMapper;
import com.ruoyi.system.service.DeviceAdapterErrorCodes;

@ExtendWith(MockitoExtension.class)
class DeviceAdapterServiceImplTest
{
    @Mock
    private TDeviceAdapterMapper adapterMapper;

    @Mock
    private DeviceAdapterRegistry registry;

    @Mock
    private DeviceAdapter deviceAdapter;

    private DeviceAdapterServiceImpl service;
    private TDeviceAdapter adapter;

    @BeforeEach
    void setUp()
    {
        service = new DeviceAdapterServiceImpl(adapterMapper, registry);
        adapter = new TDeviceAdapter();
        adapter.setAdapterId(7L);
        adapter.setAdapterCode("lab-bts");
        adapter.setAdapterName("一号 BTS");
        adapter.setAdapterType("BTS");
        adapter.setHost("127.0.0.1");
        adapter.setPort(502);
        adapter.setPollIntervalMs(5000);
        adapter.setTimezoneId("Asia/Hong_Kong");
        adapter.setReadOnly(true);
        adapter.setStatus("0");
    }

    @Test
    void enablingAdapterSynchronizesRuntimeWithoutConstructingVendorClient()
    {
        adapter.setStatus("1");
        when(adapterMapper.selectDeviceAdapterById(7L)).thenReturn(adapter);
        when(adapterMapper.updateDeviceAdapterStatus(7L, "0", "admin")).thenReturn(1);

        int rows = service.changeStatus(7L, true, "admin");

        assertEquals(1, rows);
        verify(registry).synchronize(any());
    }

    @Test
    void repeatedDiscoveryUpsertsStableChannelIdentityWithoutDeletingMissingChannels()
    {
        when(adapterMapper.selectDeviceAdapterById(7L)).thenReturn(adapter);
        when(deviceAdapter.discoverChannels()).thenReturn(List.of(
                new DetectedChannel(new ChannelIdentity("lab-bts", 22, 1, 2, 3), "192.168.1.35", true),
                new DetectedChannel(new ChannelIdentity("lab-bts", 22, 1, 2, 4), "192.168.1.35", false)));
        stubRegistryExecution();
        when(adapterMapper.selectCabinetIdByIdentity(7L, 22, 1)).thenReturn(10L);

        assertEquals(2, service.discover(7L).channelCount());
        assertEquals(2, service.discover(7L).channelCount());

        verify(adapterMapper, times(4)).upsertDetectedChannel(any(TDetectionChannel.class));
        verify(adapterMapper, times(2)).updateDiscoverySuccess(eq(7L), any());
        verify(adapterMapper, times(2)).updateDetectedCabinet(any(TDetectionCabinet.class));
    }

    @Test
    void discoveryPersistsRealtimeWorkStatusForAvailableChannels()
    {
        ChannelIdentity identity = new ChannelIdentity("lab-bts", 22, 1, 2, 3);
        when(adapterMapper.selectDeviceAdapterById(7L)).thenReturn(adapter);
        when(deviceAdapter.discoverChannels()).thenReturn(List.of(
                new DetectedChannel(identity, "192.168.1.35", true)));
        when(deviceAdapter.inquire(Set.of(identity))).thenReturn(Map.of(identity,
                new RealtimeSnapshot(identity, DeviceWorkStatus.WORKING, 1, 2, "cc", null,
                        BigDecimal.ONE, BigDecimal.TEN, null, null, 3L, 2L, null,
                        Instant.parse("2026-08-26T01:02:03Z"), Map.of())));
        when(adapterMapper.selectCabinetIdByIdentity(7L, 22, 1)).thenReturn(10L);
        stubRegistryExecution();

        service.discover(7L);

        var channel = org.mockito.ArgumentCaptor.forClass(TDetectionChannel.class);
        verify(adapterMapper).upsertDetectedChannel(channel.capture());
        assertEquals("WORKING", channel.getValue().getWorkStatus());
    }

    @Test
    void connectionFailureHasStableCodeAndLaterDiscoveryClearsError()
    {
        when(adapterMapper.selectDeviceAdapterById(7L)).thenReturn(adapter);
        when(deviceAdapter.discoverChannels())
                .thenThrow(new DeviceAdapterException("CONNECTION_FAILED", "connection refused", null))
                .thenReturn(List.of());
        stubRegistryExecution();

        ServiceException failure = assertThrows(ServiceException.class, () -> service.discover(7L));
        assertEquals(DeviceAdapterErrorCodes.DISCOVERY_FAILED, failure.getCode());
        verify(adapterMapper).updateDiscoveryFailure(7L, "CONNECTION_FAILED", "connection refused");

        assertEquals(0, service.discover(7L).channelCount());
        verify(adapterMapper).updateDiscoverySuccess(eq(7L), any());
    }

    @SuppressWarnings("unchecked")
    private void stubRegistryExecution()
    {
        when(registry.execute(eq("lab-bts"), any())).thenAnswer(invocation ->
                ((Function<DeviceAdapter, Object>) invocation.getArgument(1)).apply(deviceAdapter));
    }
}