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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
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// specific language governing permissions and limitations
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package com.cloud.vm;

import java.util.List;

import org.apache.cloudstack.api.ServerApiException;
import org.apache.cloudstack.api.command.user.vm.RestoreVMCmd;
import org.apache.log4j.Logger;
import org.junit.Test;
import org.junit.Before;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.mockito.Spy;

import com.cloud.exception.ConcurrentOperationException;
import com.cloud.exception.InsufficientCapacityException;
import com.cloud.exception.InvalidParameterValueException;
import com.cloud.exception.ResourceAllocationException;
import com.cloud.exception.ResourceUnavailableException;
import com.cloud.storage.StorageManager;
import com.cloud.storage.VMTemplateVO;
import com.cloud.storage.VolumeManager;
import com.cloud.storage.VolumeVO;
import com.cloud.storage.dao.VMTemplateDao;
import com.cloud.storage.dao.VolumeDao;
import com.cloud.user.Account;
import com.cloud.user.AccountManager;
import com.cloud.user.AccountVO;
import com.cloud.user.UserVO;
import com.cloud.user.dao.AccountDao;
import com.cloud.user.dao.UserDao;
import com.cloud.utils.exception.CloudRuntimeException;
import com.cloud.vm.dao.UserVmDao;

import static org.mockito.Mockito.*;

public class UserVmManagerTest {

    @Spy UserVmManagerImpl _userVmMgr = new UserVmManagerImpl();
    @Mock VirtualMachineManager _itMgr;
    @Mock VolumeManager _storageMgr;
    @Mock Account _account;
    @Mock AccountManager _accountMgr;
    @Mock AccountDao _accountDao;
    @Mock UserDao _userDao;
    @Mock UserVmDao _vmDao;
    @Mock VMTemplateDao _templateDao;
    @Mock VolumeDao _volsDao;
    @Mock RestoreVMCmd _restoreVMCmd;
    @Mock AccountVO _accountMock;
    @Mock UserVO _userMock;
    @Mock UserVmVO _vmMock;
    @Mock VMTemplateVO _templateMock;
    @Mock VolumeVO _volumeMock;
    @Mock List<VolumeVO> _rootVols;
    @Before
    public void setup(){
        MockitoAnnotations.initMocks(this);

        _userVmMgr._vmDao = _vmDao;
        _userVmMgr._templateDao = _templateDao;
        _userVmMgr._volsDao = _volsDao;
        _userVmMgr._itMgr = _itMgr;
        _userVmMgr.volumeMgr = _storageMgr;
        _userVmMgr._accountDao = _accountDao;
        _userVmMgr._userDao = _userDao;
        _userVmMgr._accountMgr = _accountMgr;

        doReturn(3L).when(_account).getId();
        doReturn(8L).when(_vmMock).getAccountId();
        when(_accountDao.findById(anyLong())).thenReturn(_accountMock);
        when(_userDao.findById(anyLong())).thenReturn(_userMock);
        doReturn(Account.State.enabled).when(_account).getState();
        when(_vmMock.getId()).thenReturn(314L);

    }

    // Test restoreVm when VM state not in running/stopped case
    @Test(expected=CloudRuntimeException.class)
    public void testRestoreVMF1() throws ResourceAllocationException {

        when(_vmDao.findById(anyLong())).thenReturn(_vmMock);
        when(_templateDao.findById(anyLong())).thenReturn(_templateMock);
        doReturn(VirtualMachine.State.Error).when(_vmMock).getState();
        _userVmMgr.restoreVMInternal(_account, _vmMock, null);
    }

    // Test restoreVm when VM is in stopped state
    @Test
    public void testRestoreVMF2()  throws ResourceUnavailableException, InsufficientCapacityException, ServerApiException,
        ConcurrentOperationException, ResourceAllocationException {

        doReturn(VirtualMachine.State.Stopped).when(_vmMock).getState();
        when(_vmDao.findById(anyLong())).thenReturn(_vmMock);
        when(_volsDao.findByInstance(anyLong())).thenReturn(_rootVols);
        doReturn(false).when(_rootVols).isEmpty();
        when(_rootVols.get(eq(0))).thenReturn(_volumeMock);
        doReturn(3L).when(_volumeMock).getTemplateId();
        when(_templateDao.findById(anyLong())).thenReturn(_templateMock);
        when(_storageMgr.allocateDuplicateVolume(_volumeMock, null)).thenReturn(_volumeMock);
        doNothing().when(_volsDao).attachVolume(anyLong(), anyLong(), anyLong());
        when(_volumeMock.getId()).thenReturn(3L);
        doNothing().when(_volsDao).detachVolume(anyLong());
      
        when(_templateMock.getUuid()).thenReturn("e0552266-7060-11e2-bbaa-d55f5db67735");

        _userVmMgr.restoreVMInternal(_account, _vmMock, null);

    }

    // Test restoreVM when VM is in running state
    @Test
    public void testRestoreVMF3()  throws ResourceUnavailableException, InsufficientCapacityException, ServerApiException,
        ConcurrentOperationException, ResourceAllocationException {

        doReturn(VirtualMachine.State.Running).when(_vmMock).getState();
        when(_vmDao.findById(anyLong())).thenReturn(_vmMock);
        when(_volsDao.findByInstance(anyLong())).thenReturn(_rootVols);
        doReturn(false).when(_rootVols).isEmpty();
        when(_rootVols.get(eq(0))).thenReturn(_volumeMock);
        doReturn(3L).when(_volumeMock).getTemplateId();
        when(_templateDao.findById(anyLong())).thenReturn(_templateMock);
        when(_itMgr.stop(_vmMock, _userMock, _account)).thenReturn(true);
        when(_itMgr.start(_vmMock, null, _userMock, _account)).thenReturn(_vmMock);
        when(_storageMgr.allocateDuplicateVolume(_volumeMock, null)).thenReturn(_volumeMock);
        doNothing().when(_volsDao).attachVolume(anyLong(), anyLong(), anyLong());
        when(_volumeMock.getId()).thenReturn(3L);
        doNothing().when(_volsDao).detachVolume(anyLong());
     
        when(_templateMock.getUuid()).thenReturn("e0552266-7060-11e2-bbaa-d55f5db67735");

        _userVmMgr.restoreVMInternal(_account, _vmMock, null);

    }

    // Test restoreVM on providing new template Id, when VM is in running state
    @Test
    public void testRestoreVMF4()  throws ResourceUnavailableException, InsufficientCapacityException, ServerApiException,
            ConcurrentOperationException, ResourceAllocationException {
        doReturn(VirtualMachine.State.Running).when(_vmMock).getState();
        when(_vmDao.findById(anyLong())).thenReturn(_vmMock);
        when(_volsDao.findByInstance(anyLong())).thenReturn(_rootVols);
        doReturn(false).when(_rootVols).isEmpty();
        when(_rootVols.get(eq(0))).thenReturn(_volumeMock);
        doReturn(3L).when(_volumeMock).getTemplateId();
        when(_templateDao.findById(anyLong())).thenReturn(_templateMock);
        doNothing().when(_accountMgr).checkAccess(_account, null, true, _templateMock);
        when(_itMgr.stop(_vmMock, _userMock, _account)).thenReturn(true);
        when(_storageMgr.allocateDuplicateVolume(_volumeMock, 14L)).thenReturn(_volumeMock);
        when(_templateMock.getGuestOSId()).thenReturn(5L);
        doNothing().when(_vmMock).setGuestOSId(anyLong());
        doNothing().when(_vmMock).setTemplateId(3L);
        when(_vmDao.update(314L, _vmMock)).thenReturn(true);
        when(_itMgr.start(_vmMock, null, _userMock, _account)).thenReturn(_vmMock);
        when(_storageMgr.allocateDuplicateVolume(_volumeMock, null)).thenReturn(_volumeMock);
        doNothing().when(_volsDao).attachVolume(anyLong(), anyLong(), anyLong());
        when(_volumeMock.getId()).thenReturn(3L);
        doNothing().when(_volsDao).detachVolume(anyLong());
      
        when(_templateMock.getUuid()).thenReturn("b1a3626e-72e0-4697-8c7c-a110940cc55d");

        _userVmMgr.restoreVMInternal(_account, _vmMock, 14L);

    }

}