package info.frostfs.sdk.services;

import frostfs.apemanager.APEManagerServiceGrpc;
import frostfs.apemanager.Service;
import info.frostfs.sdk.FileUtils;
import info.frostfs.sdk.dto.chain.Chain;
import info.frostfs.sdk.dto.chain.ChainTarget;
import info.frostfs.sdk.enums.TargetType;
import info.frostfs.sdk.exceptions.ValidationFrostFSException;
import info.frostfs.sdk.jdo.ClientEnvironment;
import info.frostfs.sdk.services.impl.ApeManagerClientImpl;
import info.frostfs.sdk.testgenerator.ApeManagerGenerator;
import info.frostfs.sdk.tools.RequestConstructor;
import info.frostfs.sdk.tools.RequestSigner;
import info.frostfs.sdk.tools.Verifier;
import io.grpc.Channel;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.junit.platform.commons.util.ReflectionUtils;
import org.mockito.ArgumentCaptor;
import org.mockito.Mock;
import org.mockito.MockedStatic;
import org.mockito.Mockito;
import org.mockito.junit.jupiter.MockitoExtension;

import java.lang.reflect.Field;
import java.util.stream.Collectors;

import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.Mockito.*;

@ExtendWith(MockitoExtension.class)
class ApeManagerClientTest {
    private ApeManagerClientImpl apeManagerClient;

    @Mock
    private APEManagerServiceGrpc.APEManagerServiceBlockingStub apeManagerServiceClient;
    @Mock
    private ClientEnvironment clientEnvironment;
    @Mock
    private Channel channel;

    private MockedStatic<Verifier> verifierMock;
    private MockedStatic<RequestConstructor> requestConstructorMock;
    private MockedStatic<RequestSigner> requestSignerMock;

    @BeforeEach
    void setUp() throws IllegalAccessException {
        when(clientEnvironment.getChannel()).thenReturn(channel);
        apeManagerClient = new ApeManagerClientImpl(clientEnvironment);

        Field field = ReflectionUtils.findFields(ApeManagerClientImpl.class,
                        f -> f.getName().equals("apeManagerServiceClient"),
                        ReflectionUtils.HierarchyTraversalMode.TOP_DOWN)
                .get(0);

        field.setAccessible(true);
        field.set(apeManagerClient, apeManagerServiceClient);

        verifierMock = Mockito.mockStatic(Verifier.class);
        requestConstructorMock = Mockito.mockStatic(RequestConstructor.class);
        requestSignerMock = Mockito.mockStatic(RequestSigner.class);
    }

    @AfterEach
    void cleanUp() {
        verifierMock.close();
        requestConstructorMock.close();
        requestSignerMock.close();
    }

    @Test
    void addChain_success() {
        //Given
        Chain chain = generateChain();
        ChainTarget chainTarget = generateChainTarget();

        var response = ApeManagerGenerator.generateAddChainResponse();

        var captor = ArgumentCaptor.forClass(Service.AddChainRequest.class);

        when(apeManagerServiceClient.addChain(captor.capture())).thenReturn(response);

        //When
        var result = apeManagerClient.addChain(chain, chainTarget);

        //Then
        requestConstructorMock.verify(
                () -> RequestConstructor.addMetaHeader(any(Service.AddChainRequest.Builder.class), eq(null)),
                times(1)
        );
        requestSignerMock.verify(
                () -> RequestSigner.sign(any(Service.AddChainRequest.Builder.class), eq(null)),
                times(1)
        );
        verifierMock.verify(() -> Verifier.checkResponse(response), times(1));

        assertThat(result).containsOnly(response.getBody().getChainId().toByteArray());

        var request = captor.getValue();
        assertThat(request.getBody().getChain().getRaw().toByteArray()).containsOnly(chain.getRaw());
        assertEquals(chainTarget.getName(), request.getBody().getTarget().getName());
        assertEquals(chainTarget.getType().value, request.getBody().getTarget().getType().getNumber());
    }

    @Test
    void addChain_wrongParams() {
        //Given
        Chain chain = generateChain();
        ChainTarget chainTarget = generateChainTarget();

        //When + Then
        assertThrows(ValidationFrostFSException.class, () -> apeManagerClient.addChain(null, chainTarget));
        assertThrows(ValidationFrostFSException.class, () -> apeManagerClient.addChain(chain, null));
        assertThrows(ValidationFrostFSException.class, () -> apeManagerClient.addChain(null, null));
    }

    @Test
    void removeChain_success() {
        //Given
        Chain chain = generateChain();
        ChainTarget chainTarget = generateChainTarget();

        var response = ApeManagerGenerator.generateRemoveChainResponse();

        var captor = ArgumentCaptor.forClass(Service.RemoveChainRequest.class);

        when(apeManagerServiceClient.removeChain(captor.capture())).thenReturn(response);

        //When
        apeManagerClient.removeChain(chain, chainTarget);

        //Then
        requestConstructorMock.verify(
                () -> RequestConstructor.addMetaHeader(any(Service.RemoveChainRequest.Builder.class), eq(null)),
                times(1)
        );
        requestSignerMock.verify(
                () -> RequestSigner.sign(any(Service.RemoveChainRequest.Builder.class), eq(null)),
                times(1)
        );
        verifierMock.verify(() -> Verifier.checkResponse(response), times(1));

        var request = captor.getValue();
        assertThat(request.getBody().getChainId().toByteArray()).containsOnly(chain.getRaw());
        assertEquals(chainTarget.getName(), request.getBody().getTarget().getName());
        assertEquals(chainTarget.getType().value, request.getBody().getTarget().getType().getNumber());
    }

    @Test
    void removeChain_wrongParams() {
        //Given
        Chain chain = generateChain();
        ChainTarget chainTarget = generateChainTarget();

        //When + Then
        assertThrows(ValidationFrostFSException.class, () -> apeManagerClient.removeChain(null, chainTarget));
        assertThrows(ValidationFrostFSException.class, () -> apeManagerClient.removeChain(chain, null));
        assertThrows(ValidationFrostFSException.class, () -> apeManagerClient.removeChain(null, null));
    }

    @Test
    void listChain_success() {
        //Given
        ChainTarget chainTarget = generateChainTarget();

        var response = ApeManagerGenerator.generateListChainsResponse();

        var captor = ArgumentCaptor.forClass(Service.ListChainsRequest.class);

        when(apeManagerServiceClient.listChains(captor.capture())).thenReturn(response);

        //When
        var result = apeManagerClient.listChains(chainTarget);

        //Then
        requestConstructorMock.verify(
                () -> RequestConstructor.addMetaHeader(any(Service.ListChainsRequest.Builder.class), eq(null)),
                times(1)
        );
        requestSignerMock.verify(
                () -> RequestSigner.sign(any(Service.ListChainsRequest.Builder.class), eq(null)),
                times(1)
        );
        verifierMock.verify(() -> Verifier.checkResponse(response), times(1));

        var actual = result.stream().map(Chain::getRaw).collect(Collectors.toList());
        var expected = response.getBody().getChainsList().stream()
                .map(chain -> chain.getRaw().toByteArray())
                .collect(Collectors.toList());
        assertThat(actual).hasSize(10).containsAll(expected);

        var request = captor.getValue();
        assertEquals(chainTarget.getName(), request.getBody().getTarget().getName());
        assertEquals(chainTarget.getType().value, request.getBody().getTarget().getType().getNumber());
    }

    @Test
    void listChain_wrongParams() {
        //When + Then
        assertThrows(ValidationFrostFSException.class, () -> apeManagerClient.listChains(null));
    }

    private Chain generateChain() {
        byte[] chainRaw = FileUtils.resourceToBytes("test_chain_raw.json");
        return new Chain(chainRaw);
    }

    private ChainTarget generateChainTarget() {
        return new ChainTarget("BzQw5HH3feoxFDD5tCT87Y1726qzgLfxEE7wgtoRzB3R", TargetType.NAMESPACE);
    }
}