/*
 * 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
 * under the License.
 */
package org.apache.felix.bundlerepository.impl;

import java.net.URL;
import java.util.Collections;
import java.util.Hashtable;

import junit.framework.TestCase;

import org.apache.felix.bundlerepository.Repository;
import org.apache.felix.bundlerepository.Requirement;
import org.apache.felix.bundlerepository.Resolver;
import org.apache.felix.bundlerepository.Resource;
import org.apache.felix.utils.filter.FilterImpl;
import org.apache.felix.utils.log.Logger;
import org.easymock.Capture;
import org.easymock.EasyMock;
import org.easymock.IAnswer;
import org.easymock.internal.matchers.Captures;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleListener;
import org.osgi.framework.ServiceListener;
import org.osgi.framework.wiring.BundleRevision;
import org.osgi.resource.Capability;

public class ResolverImplTest extends TestCase
{
    public void testReferral1() throws Exception
    {

        URL url = getClass().getResource("/repo_for_resolvertest.xml");
        RepositoryAdminImpl repoAdmin = createRepositoryAdmin();
        RepositoryImpl repo = (RepositoryImpl) repoAdmin.addRepository(url);

        Resolver resolver = repoAdmin.resolver();

        Resource[] discoverResources = repoAdmin.discoverResources("(symbolicname=org.apache.felix.test*)");
        assertNotNull(discoverResources);
        assertEquals(1, discoverResources.length);

        resolver.add(discoverResources[0]);
        assertTrue(resolver.resolve());
    }

    public void testMatchingReq() throws Exception
    {
        RepositoryAdminImpl repoAdmin = createRepositoryAdmin();
        repoAdmin.addRepository(getClass().getResource("/repo_for_resolvertest.xml"));

        Resource[] res = repoAdmin.discoverResources(
            new Requirement[] { repoAdmin.getHelper().requirement(
                "package", "(package=org.apache.felix.test.osgi)") });
        assertNotNull(res);
        assertEquals(1, res.length);
    }

    public void testResolveReq() throws Exception
    {
        RepositoryAdminImpl repoAdmin = createRepositoryAdmin();
        repoAdmin.addRepository(getClass().getResource("/repo_for_resolvertest.xml"));

        Resolver resolver = repoAdmin.resolver();
        resolver.add(repoAdmin.getHelper().requirement("package", "(package=org.apache.felix.test.osgi)"));
        assertTrue(resolver.resolve());
    }

    public void testResolveInterrupt() throws Exception
    {
        RepositoryAdminImpl repoAdmin = createRepositoryAdmin();
        repoAdmin.addRepository(getClass().getResource("/repo_for_resolvertest.xml"));

        Resolver resolver = repoAdmin.resolver();
        resolver.add(repoAdmin.getHelper().requirement("package", "(package=org.apache.felix.test.osgi)"));

        Thread.currentThread().interrupt();
        try
        {
            resolver.resolve();
            fail("An excepiton should have been thrown");
        }
        catch (org.apache.felix.bundlerepository.InterruptedResolutionException e)
        {
            // ok
        }
    }

    public void testOptionalResolution() throws Exception
    {
        RepositoryAdminImpl repoAdmin = createRepositoryAdmin();
        repoAdmin.addRepository(getClass().getResource("/repo_for_optional_resources.xml"));

        Resolver resolver = repoAdmin.resolver();
        resolver.add(repoAdmin.getHelper().requirement("bundle", "(symbolicname=res1)"));

        assertTrue(resolver.resolve());
        assertEquals(1, resolver.getRequiredResources().length);
        assertEquals(2, resolver.getOptionalResources().length);
    }

    public void testMandatoryPackages() throws Exception
    {
        RepositoryAdminImpl repoAdmin = createRepositoryAdmin();
        repoAdmin.addRepository(getClass().getResource("/repo_for_mandatory.xml"));

        Resolver resolver = repoAdmin.resolver();
        resolver.add(repoAdmin.getHelper().requirement("bundle", "(symbolicname=res2)"));
        assertFalse(resolver.resolve());

        resolver = repoAdmin.resolver();
        resolver.add(repoAdmin.getHelper().requirement("bundle", "(symbolicname=res3)"));
        assertTrue(resolver.resolve());

        resolver = repoAdmin.resolver();
        resolver.add(repoAdmin.getHelper().requirement("bundle", "(symbolicname=res4)"));
        assertFalse(resolver.resolve());

    }

    public static void main(String[] args) throws Exception
    {
        new ResolverImplTest().testReferral1();
    }

    private RepositoryAdminImpl createRepositoryAdmin() throws Exception
    {
        BundleContext bundleContext = EasyMock.createMock(BundleContext.class);
        Bundle systemBundle = EasyMock.createMock(Bundle.class);
        BundleRevision systemBundleRevision = EasyMock.createMock(BundleRevision.class);

        Activator.setContext(bundleContext);
        EasyMock.expect(bundleContext.getProperty(RepositoryAdminImpl.REPOSITORY_URL_PROP))
                    .andReturn(getClass().getResource("/referred.xml").toExternalForm());
        EasyMock.expect(bundleContext.getProperty((String) EasyMock.anyObject())).andReturn(null).anyTimes();
        EasyMock.expect(bundleContext.getBundle(0)).andReturn(systemBundle);
        EasyMock.expect(systemBundle.getHeaders()).andReturn(new Hashtable());
        EasyMock.expect(systemBundle.getRegisteredServices()).andReturn(null);
        EasyMock.expect(new Long(systemBundle.getBundleId())).andReturn(new Long(0)).anyTimes();
        EasyMock.expect(systemBundle.getBundleContext()).andReturn(bundleContext);
        EasyMock.expect(systemBundleRevision.getCapabilities(null)).andReturn(Collections.<Capability>emptyList());
        EasyMock.expect(systemBundle.adapt(BundleRevision.class)).andReturn(systemBundleRevision);
        bundleContext.addBundleListener((BundleListener) EasyMock.anyObject());
        bundleContext.addServiceListener((ServiceListener) EasyMock.anyObject());
        EasyMock.expect(bundleContext.getBundles()).andReturn(new Bundle[] { systemBundle });
        final Capture c = new Capture();
        EasyMock.expect(bundleContext.createFilter((String) capture(c))).andAnswer(new IAnswer() {
            public Object answer() throws Throwable {
                return FilterImpl.newInstance((String) c.getValue());
            }
        }).anyTimes();
        EasyMock.replay(new Object[] { bundleContext, systemBundle, systemBundleRevision });

        RepositoryAdminImpl repoAdmin = new RepositoryAdminImpl(bundleContext, new Logger(bundleContext));

        // force initialization && remove all initial repositories
        Repository[] repos = repoAdmin.listRepositories();
        for (int i = 0; repos != null && i < repos.length; i++)
        {
            repoAdmin.removeRepository(repos[i].getURI());
        }

        return repoAdmin;
    }

    static Object capture(Capture capture) {
        EasyMock.reportMatcher(new Captures(capture));
        return null;
    }

}