//
// Licensed to the Apache Software Foundation (ASF) under one
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// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
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package com.cloud.resourcelimit;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyInt;
import static org.mockito.Mockito.when;
import static org.mockito.MockitoAnnotations.initMocks;

import java.util.ArrayList;
import java.util.List;

import org.apache.cloudstack.context.CallContext;
import org.apache.cloudstack.reservation.ReservationVO;
import org.apache.cloudstack.reservation.dao.ReservationDao;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.stubbing.Answer;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PowerMockIgnore;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import org.springframework.test.util.ReflectionTestUtils;

import com.cloud.configuration.Resource;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.user.Account;
import com.cloud.user.ResourceLimitService;
import com.cloud.utils.db.GlobalLock;
import com.cloud.utils.exception.CloudRuntimeException;

@RunWith(PowerMockRunner.class)
@PrepareForTest({GlobalLock.class, CheckedReservation.class})
@PowerMockIgnore({"javax.xml.*", "org.w3c.dom.*", "org.apache.xerces.*", "org.xml.*"})
public class CheckedReservationTest {

    @Mock
    Account account;
    @Mock
    ReservationDao reservationDao;
    @Mock
    ResourceLimitService resourceLimitService;

    @Mock
    ReservationVO reservation = new ReservationVO(1l, 1l, Resource.ResourceType.user_vm, 1l);

    @Mock
    GlobalLock quotaLimitLock;

    @Before
    public void setup() {
        initMocks(this);
        when(reservation.getId()).thenReturn(1l);
        PowerMockito.mockStatic(GlobalLock.class);
        PowerMockito.when(GlobalLock.getInternLock(Mockito.anyString())).thenReturn(quotaLimitLock);
        when(quotaLimitLock.lock(anyInt())).thenReturn(true);
    }

    @Test
    public void getId() {
        when(reservationDao.persist(any())).thenReturn(reservation);
        when(account.getAccountId()).thenReturn(1l);
        when(account.getDomainId()).thenReturn(4l);
        boolean fail = false;
        try (CheckedReservation cr = new CheckedReservation(account, Resource.ResourceType.user_vm,1l, reservationDao, resourceLimitService); ) {
            List<Long> ids = cr.getIds();
            assertEquals(1, cr.getIds().size());
            long id = ids.get(0);
            assertEquals(1l, id);
        } catch (NullPointerException npe) {
            fail("NPE caught");
        } catch (ResourceAllocationException rae) {
            // this does not work on all plafroms because of the static methods being used in the global lock mechanism
            // normally one would
            // throw new CloudRuntimeException(rae);
            // but we'll ignore this for platforms that can not humour the static bits of the system.
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Test
    public void getNoAmount() {
        when(reservationDao.persist(any())).thenReturn(reservation);
        when(account.getAccountId()).thenReturn(1l);
        boolean fail = false;
        try (CheckedReservation cr = new CheckedReservation(account, Resource.ResourceType.cpu,-11l, reservationDao, resourceLimitService); ) {
            Long amount = cr.getReservedAmount();
            assertEquals(Long.valueOf(-11L), amount);
        } catch (NullPointerException npe) {
            fail("NPE caught");
        } catch (ResourceAllocationException rae) {
            throw new CloudRuntimeException(rae);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Test
    public void testReservationPersistAndCallContextParam() {
        List<String> tags = List.of("abc", "xyz");
        when(account.getAccountId()).thenReturn(1L);
        when(account.getDomainId()).thenReturn(4L);
        Resource.ResourceType type = Resource.ResourceType.cpu;
        String lockName = String.format("CheckedReservation-%s/%d", account.getDomainId(), type.getOrdinal());
        GlobalLock lock = GlobalLock.getInternLock(lockName);
        lock.unlock();
        List<ReservationVO> persistedReservations = new ArrayList<>();
        Mockito.when(reservationDao.persist(Mockito.any(ReservationVO.class))).thenAnswer((Answer<ReservationVO>) invocation -> {
            ReservationVO reservationVO = (ReservationVO)invocation.getArguments()[0];
            ReflectionTestUtils.setField(reservationVO, "id", (long)(persistedReservations.size() + 1));
            persistedReservations.add(reservationVO);
            return reservationVO;
        });
        try (CheckedReservation cr = new CheckedReservation(account, type, tags, 2L, reservationDao, resourceLimitService);) {
            Assert.assertEquals(tags.size() + 1, persistedReservations.size()); // An extra for no tag
            Object obj = CallContext.current().getContextParameter(CheckedReservation.getResourceReservationContextParameterKey(type));
            Assert.assertTrue(obj instanceof List);
            List<Long> list = (List<Long>)obj;
            Assert.assertEquals(tags.size() + 1, list.size()); // An extra for no tag
        } catch (Exception e) {
            Assert.fail("Exception faced: " + e.getMessage());
        }
    }
}