/*
 * Copyright 2012, 2013 Red Hat, Inc.
 *
 * This file is part of Thermostat.
 *
 * Thermostat is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2, or (at your
 * option) any later version.
 *
 * Thermostat is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Thermostat; see the file COPYING.  If not see
 * <http://www.gnu.org/licenses/>.
 *
 * Linking this code with other modules is making a combined work
 * based on this code.  Thus, the terms and conditions of the GNU
 * General Public License cover the whole combination.
 *
 * As a special exception, the copyright holders of this code give
 * you permission to link this code with independent modules to
 * produce an executable, regardless of the license terms of these
 * independent modules, and to copy and distribute the resulting
 * executable under terms of your choice, provided that you also
 * meet, for each linked independent module, the terms and conditions
 * of the license of that module.  An independent module is a module
 * which is not derived from or based on this code.  If you modify
 * this code, you may extend this exception to your version of the
 * library, but you are not obligated to do so.  If you do not wish
 * to do so, delete this exception statement from your version.
 */

package com.redhat.thermostat.vm.heap.analysis.command.internal;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.fail;
import static org.mockito.Matchers.isA;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import java.util.Arrays;
import java.util.Calendar;
import java.util.TimeZone;

import org.apache.commons.cli.Options;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Ignore;
import org.junit.Test;

import com.redhat.thermostat.common.cli.Command;
import com.redhat.thermostat.common.cli.CommandException;
import com.redhat.thermostat.common.cli.SimpleArguments;
import com.redhat.thermostat.storage.core.HostRef;
import com.redhat.thermostat.storage.core.VmRef;
import com.redhat.thermostat.storage.dao.HostInfoDAO;
import com.redhat.thermostat.storage.dao.VmInfoDAO;
import com.redhat.thermostat.test.TestCommandContextFactory;
import com.redhat.thermostat.testutils.StubBundleContext;
import com.redhat.thermostat.vm.heap.analysis.common.HeapDAO;
import com.redhat.thermostat.vm.heap.analysis.common.model.HeapInfo;

public class ListHeapDumpsCommandTest {

    private static TimeZone defaultTimezone;

    @BeforeClass
    public static void setUpClass() {
        defaultTimezone = TimeZone.getDefault();
        TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
    }

    @AfterClass
    public static void tearDownClass() {
        TimeZone.setDefault(defaultTimezone);
    }

    @Test
    public void verifyBasics() {
        StubBundleContext context = new StubBundleContext();
        Command command = new ListHeapDumpsCommand(context);
        assertEquals("list-heap-dumps", command.getName());
        assertNotNull(command.getDescription());
        assertNotNull(command.getUsage());
    }

    @Ignore
    @Test
    public void verifyOptions() {
        StubBundleContext context = new StubBundleContext();
        Command command = new ListHeapDumpsCommand(context);
        Options options = command.getOptions();
        assertNotNull(options);
        assertEquals(2, options.getOptions().size());
    }

    @Test
    public void verifyFailsWithoutHostDao() throws Exception {
        StubBundleContext context = new StubBundleContext();
        Command command = new ListHeapDumpsCommand(context);
        
        TestCommandContextFactory factory = new TestCommandContextFactory();
        try {
            command.run(factory.createContext(new SimpleArguments()));
            fail();
        } catch (CommandException hostDaoNotAvailableException) {
            assertEquals("Unable to access host information (HostInfoDAO unavailable)",
                    hostDaoNotAvailableException.getMessage());
        }
    }

    @Test
    public void verifyWorksWithoutAnyInformation() throws CommandException {
        HostInfoDAO hostInfo = mock(HostInfoDAO.class);
        VmInfoDAO vmInfo = mock(VmInfoDAO.class);
        HeapDAO heapDao = mock(HeapDAO.class);

        StubBundleContext context = new StubBundleContext();
        context.registerService(HostInfoDAO.class, hostInfo, null);
        context.registerService(VmInfoDAO.class, vmInfo, null);
        context.registerService(HeapDAO.class, heapDao, null);

        Command command = new ListHeapDumpsCommand(context);
        TestCommandContextFactory factory = new TestCommandContextFactory();
        command.run(factory.createContext(new SimpleArguments()));
        assertEquals("HOST ID VM ID HEAP ID TIMESTAMP\n", factory.getOutput());
    }

    @Test
    public void verifyWorks() throws CommandException {
        HostRef hostRef = mock(HostRef.class);
        when(hostRef.getStringID()).thenReturn("host-id");
        VmRef vmRef = mock(VmRef.class);
        when(vmRef.getStringID()).thenReturn("1");

        HeapInfo heapInfo = mock(HeapInfo.class);
        Calendar timestamp = Calendar.getInstance();
        timestamp.set(2012, 5, 7, 15, 32, 0);
        when(heapInfo.getTimeStamp()).thenReturn(timestamp.getTimeInMillis());
        when(heapInfo.getHeapId()).thenReturn("0001");

        HeapDAO heapDao = mock(HeapDAO.class);

        VmInfoDAO vmInfo = mock(VmInfoDAO.class);
        when(vmInfo.getVMs(hostRef)).thenReturn(Arrays.asList(vmRef));

        HostInfoDAO hostInfo = mock(HostInfoDAO.class);
        when(hostInfo.getHosts()).thenReturn(Arrays.asList(hostRef));

        when(heapDao.getAllHeapInfo(vmRef)).thenReturn(Arrays.asList(heapInfo));

        StubBundleContext context = new StubBundleContext();
        context.registerService(HostInfoDAO.class, hostInfo, null);
        context.registerService(VmInfoDAO.class, vmInfo, null);
        context.registerService(HeapDAO.class, heapDao, null);

        Command command = new ListHeapDumpsCommand(context);
        TestCommandContextFactory factory = new TestCommandContextFactory();
        command.run(factory.createContext(new SimpleArguments()));

        String expected = "HOST ID VM ID HEAP ID TIMESTAMP\n" +
                          "host-id 1     0001    Thu Jun 07 15:32:00 UTC 2012\n";

        assertEquals(expected, factory.getOutput());
    }

    @Test
    public void verifyWorksWithFilterOnHost() throws CommandException {
        HostRef hostRef1 = mock(HostRef.class);
        when(hostRef1.getStringID()).thenReturn("host1");
        VmRef vmRef1 = mock(VmRef.class);
        when(vmRef1.getStringID()).thenReturn("1");

        HostRef hostRef2 = mock(HostRef.class);
        when(hostRef2.getStringID()).thenReturn("host2");
        VmRef vmRef2 = mock(VmRef.class);
        when(vmRef2.getStringID()).thenReturn("2");

        HeapInfo heapInfo = mock(HeapInfo.class);
        Calendar timestamp = Calendar.getInstance();
        timestamp.set(2012, 5, 7, 15, 32, 0);
        when(heapInfo.getTimeStamp()).thenReturn(timestamp.getTimeInMillis());
        when(heapInfo.getHeapId()).thenReturn("0001");

        HeapDAO heapDao = mock(HeapDAO.class);

        VmInfoDAO vmInfo = mock(VmInfoDAO.class);
        when(vmInfo.getVMs(isA(HostRef.class))).thenReturn(Arrays.asList(vmRef1)).thenReturn(Arrays.asList(vmRef2));

        HostInfoDAO hostInfo = mock(HostInfoDAO.class);
        when(hostInfo.getHosts()).thenReturn(Arrays.asList(hostRef1, hostRef2));

        when(heapDao.getAllHeapInfo(vmRef1)).thenReturn(Arrays.asList(heapInfo));
        when(heapDao.getAllHeapInfo(vmRef2)).thenReturn(Arrays.asList(heapInfo));

        StubBundleContext context = new StubBundleContext();
        context.registerService(HostInfoDAO.class, hostInfo, null);
        context.registerService(VmInfoDAO.class, vmInfo, null);
        context.registerService(HeapDAO.class, heapDao, null);

        Command command = new ListHeapDumpsCommand(context);
        TestCommandContextFactory factory = new TestCommandContextFactory();

        SimpleArguments args = new SimpleArguments();
        args.addArgument("hostId", "host1");

        command.run(factory.createContext(args));

        String expected = "HOST ID VM ID HEAP ID TIMESTAMP\n" +
                          "host1   1     0001    Thu Jun 07 15:32:00 UTC 2012\n";

        assertEquals(expected, factory.getOutput());
    }

    @Test
    public void verifyWorksWithFilterOnHostAndVM() throws CommandException {
        HostRef hostRef1 = mock(HostRef.class);
        when(hostRef1.getStringID()).thenReturn("host1");
        when(hostRef1.getAgentId()).thenReturn("host1");
        VmRef vmRef1 = mock(VmRef.class);
        when(vmRef1.getStringID()).thenReturn("1");

        HostRef hostRef2 = mock(HostRef.class);
        when(hostRef2.getStringID()).thenReturn("host2");
        VmRef vmRef2 = mock(VmRef.class);
        when(vmRef2.getStringID()).thenReturn("2");

        HeapInfo heapInfo = mock(HeapInfo.class);
        Calendar timestamp = Calendar.getInstance();
        timestamp.set(2012, 5, 7, 15, 32, 0);
        when(heapInfo.getTimeStamp()).thenReturn(timestamp.getTimeInMillis());
        when(heapInfo.getHeapDumpId()).thenReturn("0001");

        HeapDAO heapDao = mock(HeapDAO.class);

        VmInfoDAO vmInfo = mock(VmInfoDAO.class);
        when(vmInfo.getVMs(isA(HostRef.class))).thenReturn(Arrays.asList(vmRef1)).thenReturn(Arrays.asList(vmRef2));

        HostInfoDAO hostInfo = mock(HostInfoDAO.class);
        when(hostInfo.getHosts()).thenReturn(Arrays.asList(hostRef1, hostRef2));

        when(heapDao.getAllHeapInfo(vmRef1)).thenReturn(Arrays.asList(heapInfo));
        when(heapDao.getAllHeapInfo(vmRef2)).thenReturn(Arrays.asList(heapInfo));

        StubBundleContext context = new StubBundleContext();
        context.registerService(HostInfoDAO.class, hostInfo, null);
        context.registerService(VmInfoDAO.class, vmInfo, null);
        context.registerService(HeapDAO.class, heapDao, null);

        Command command = new ListHeapDumpsCommand(context);
        TestCommandContextFactory factory = new TestCommandContextFactory();

        SimpleArguments args = new SimpleArguments();
        args.addArgument("hostId", "host1");
        args.addArgument("vmId", "1"); // vm id must be an int for the arg parser to work

        command.run(factory.createContext(args));

        String expected = "HOST ID VM ID HEAP ID TIMESTAMP\n";

        assertEquals(expected, factory.getOutput());
    }
}