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 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * 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 org.apache.brooklyn.core.mgmt.rebind;

import static org.testng.Assert.assertEquals;

import java.util.Collections;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import org.apache.brooklyn.api.location.LocationSpec;
import org.apache.brooklyn.core.test.entity.TestApplication;
import org.apache.brooklyn.location.byon.FixedListMachineProvisioningLocation;
import org.apache.brooklyn.location.ssh.SshMachineLocation;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;

public class RebindSshMachineLocationTest extends RebindTestFixtureWithApp {

    private static final Logger LOG = LoggerFactory.getLogger(RebindSshMachineLocationTest.class);

    private FixedListMachineProvisioningLocation<SshMachineLocation> origLoc;
    private SshMachineLocation origChildLoc;
    
    @SuppressWarnings("unchecked")
    @BeforeMethod(alwaysRun=true)
    public void setUp() throws Exception {
        super.setUp();
        origChildLoc = origManagementContext.getLocationManager().createLocation(LocationSpec.create(SshMachineLocation.class)
                .configure("address", "localhost"));
        origLoc = origManagementContext.getLocationManager().createLocation(LocationSpec.create(FixedListMachineProvisioningLocation.class)
                .configure("machines", ImmutableList.of(origChildLoc)));
    }

    /** takes a while, ~3s/test due to ssh -- so just doing 10; but note the race described below (also in {@link RebindLocalhostLocationTest}) */
    @Test(groups="Integration", invocationCount=10)
    public void testMachineUsableAfterRebindRepeatedly() throws Exception {
        try {
            testMachineUsableAfterRebind();
        } catch (Exception e) {
            // Ensure exception is reported in log immediately, so can match logging with failed run
            LOG.warn("Test failed", e);
            throw e;
        }
    }
    
    @Test(groups="Integration")
    public void testMachineUsableAfterRebind() throws Exception {
        // TODO With locations not being entities, if you switch the order of these two lines then the test sometimes fails.
        // This is because the 'user' field is set (from the default PROP_USER value) when we first exec something.
        // Until that point, the field will be persisted as null, so will be explicitly set to null when deserializing.
        // There's a race for whether we've set the 'user' field before the loc gets persisted (which happens as a side-effect
        // of persisting the app along with its location tree).
        assertEquals(origChildLoc.execScript(Collections.<String,Object>emptyMap(), "mysummary", ImmutableList.of("true")), 0);
        origApp.start(ImmutableList.of(origLoc));

        newApp = (TestApplication) rebind();
        @SuppressWarnings("unchecked")
        FixedListMachineProvisioningLocation<SshMachineLocation> newLoc = (FixedListMachineProvisioningLocation<SshMachineLocation>) Iterables.getOnlyElement(newApp.getLocations(), 0);
        SshMachineLocation newChildLoc = (SshMachineLocation) Iterables.get(newLoc.getChildren(), 0);
        
        assertEquals(newChildLoc.execScript(Collections.<String,Object>emptyMap(), "mysummary", ImmutableList.of("true")), 0);
    }

    // See https://issues.apache.org/jira/browse/BROOKLYN-215
    @Test(groups="Integration")
    public void testRebindWhenPortNull() throws Exception {
        SshMachineLocation machine = origManagementContext.getLocationManager().createLocation(LocationSpec.create(SshMachineLocation.class)
                .configure("address", "localhost")
                .configure("port", null));
        FixedListMachineProvisioningLocation<?> byon = origManagementContext.getLocationManager().createLocation(LocationSpec.create(FixedListMachineProvisioningLocation.class)
                .configure("machines", ImmutableList.of(machine)));
        origApp.start(ImmutableList.of(byon));
        LOG.info("Before rebind, machine="+machine.toString());

        newApp = (TestApplication) rebind();
        
        FixedListMachineProvisioningLocation<?> newByon = (FixedListMachineProvisioningLocation<?>) Iterables.getOnlyElement(newApp.getLocations(), 0);
        SshMachineLocation newMachine = (SshMachineLocation) Iterables.get(newByon.getChildren(), 0);
        
        LOG.info("After rebind, machine="+newMachine.toString());
    }
}