/*
 * Copyright 2010 Google Inc.
 * 
 * Licensed 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 com.google.gwt.requestfactory.server;

import com.google.gwt.requestfactory.server.RequestFactoryInterfaceValidator.ClassLoaderLoader;
import com.google.gwt.requestfactory.shared.EntityProxy;
import com.google.gwt.requestfactory.shared.InstanceRequest;
import com.google.gwt.requestfactory.shared.Locator;
import com.google.gwt.requestfactory.shared.ProxyFor;
import com.google.gwt.requestfactory.shared.ProxyForName;
import com.google.gwt.requestfactory.shared.Request;
import com.google.gwt.requestfactory.shared.RequestContext;
import com.google.gwt.requestfactory.shared.RequestFactory;
import com.google.gwt.requestfactory.shared.Service;
import com.google.gwt.requestfactory.shared.ServiceName;
import com.google.gwt.requestfactory.shared.SimpleRequestFactory;
import com.google.gwt.requestfactory.shared.ValueProxy;
import com.google.gwt.requestfactory.shared.impl.FindRequest;

import junit.framework.TestCase;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * JRE tests for {@link RequestFactoryInterfaceValidator}.
 */
public class RequestFactoryInterfaceValidatorTest extends TestCase {
  static class ClinitEntity {
    static ClinitEntity findClinitEntity(String key) {
      return null;
    }

    static ClinitEntity request() {
      return null;
    }

    Object OBJECT = new Object();

    String getId() {
      return null;
    }

    int getVersion() {
      return 0;
    }
  }

  @ProxyFor(ClinitEntity.class)
  interface ClinitEntityProxy extends EntityProxy {
    Object OBJECT = new Object();
  }

  @Service(ClinitEntity.class)
  interface ClinitRequestContext extends RequestContext {
    Object OBJECT = new Object();

    Request<ClinitEntityProxy> request();
  }

  interface ClinitRequestFactory extends RequestFactory {
    Object OBJECT = new Object();

    ClinitRequestContext context();
  }

  static class Domain {
    static int fooStatic(int a) {
      return 0;
    }

    int foo(int a) {
      return 0;
    }

    java.sql.Date getSqlDate() {
      return null;
    }
  }

  @ProxyFor(Domain.class)
  interface DomainProxy extends EntityProxy {
  }

  interface DomainProxyMissingAnnotation extends EntityProxy {
  }

  static class DomainWithOverloads {
    void foo() {
    }

    void foo(int a) {
    }

    String getId() {
      return null;
    }

    int getVersion() {
      return 0;
    }
  }

  @ProxyFor(DomainWithOverloads.class)
  interface DomainWithOverloadsProxy extends EntityProxy {
    void foo();
  }

  @ProxyFor(Domain.class)
  interface DomainWithSqlDateProxy extends EntityProxy {
    java.sql.Date getSqlDate();
  }

  class Foo {
  }

  @ProxyFor(HasListDomain.class)
  interface HasList extends EntityProxy {
    List<ReachableOnlyThroughReturnedList> getList();

    void setList(List<ReachableOnlyThroughParamaterList> list);
  }

  static class HasListDomain extends Domain {
    public String getId() {
      return null;
    }

    public int getVersion() {
      return 0;
    }

    List<Domain> getList() {
      return null;
    }

    void setList(List<Domain> value) {
    }
  }

  /**
   * An entity type without the usual boilerplate.
   */
  class LocatorEntity {
  }

  class LocatorEntityLocator extends Locator<LocatorEntity, String> {
    @Override
    public LocatorEntity create(Class<? extends LocatorEntity> clazz) {
      return null;
    }

    @Override
    public LocatorEntity find(Class<? extends LocatorEntity> clazz, String id) {
      return null;
    }

    @Override
    public Class<LocatorEntity> getDomainType() {
      return null;
    }

    @Override
    public String getId(LocatorEntity domainObject) {
      return null;
    }

    @Override
    public Class<String> getIdType() {
      return null;
    }

    @Override
    public Object getVersion(LocatorEntity domainObject) {
      return null;
    }
  }

  @ProxyFor(value = LocatorEntity.class, locator = LocatorEntityLocator.class)
  interface LocatorEntityProxy extends EntityProxy {
  }

  @ProxyForName(value = "com.google.gwt.requestfactory.server.RequestFactoryInterfaceValidatorTest.LocatorEntity", locator = "badLocator")
  interface LocatorEntityProxyWithBadLocator extends EntityProxy {
  }

  @ProxyForName(value = "badDomainType", locator = "com.google.gwt.requestfactory.server.RequestFactoryInterfaceValidatorTest.LocatorEntityProxyWithBadServiceName")
  interface LocatorEntityProxyWithBadServiceName extends EntityProxy {
  }

  @ProxyFor(value = Value.class)
  interface MyValueProxy extends ValueProxy {
  }

  @ProxyFor(Domain.class)
  interface ReachableOnlyThroughParamaterList extends EntityProxy {
  }

  @ProxyFor(Domain.class)
  interface ReachableOnlyThroughReturnedList extends EntityProxy {
  }

  interface RequestContextMissingAnnotation extends RequestContext {
  }

  @Service(Domain.class)
  interface ServiceRequestMismatchedArity extends RequestContext {
    InstanceRequest<DomainProxy, Integer> foo(int a, int b);

    Request<Integer> fooStatic(int a, int b);
  }

  @Service(Domain.class)
  interface ServiceRequestMismatchedParam extends RequestContext {
    Request<Integer> foo(long a);
  }
  @Service(Domain.class)
  interface ServiceRequestMismatchedReturn extends RequestContext {
    Request<Long> foo(int a);
  }

  @Service(Domain.class)
  interface ServiceRequestMismatchedStatic extends RequestContext {
    Request<Integer> foo(int a);

    InstanceRequest<DomainProxy, Integer> fooStatic(int a);
  }

  @Service(Domain.class)
  interface ServiceRequestMissingMethod extends RequestContext {
    Request<Integer> doesNotExist(int a);
  }

  @ProxyFor(Domain.class)
  @ProxyForName("Domain")
  @Service(Domain.class)
  @ServiceName("Domain")
  interface TooManyAnnotations extends RequestContext {
  }

  static class UnexpectedIdAndVersionDomain {
    Random getId() {
      return null;
    }

    Random getVersion() {
      return null;
    }
  }

  @ProxyFor(UnexpectedIdAndVersionDomain.class)
  interface UnexpectedIdAndVersionProxy extends EntityProxy {
  }

  static class Value {
  }

  static class VisibleErrorContext extends
      RequestFactoryInterfaceValidator.ErrorContext {
    final List<String> logs;

    public VisibleErrorContext(Logger logger) {
      super(logger);
      logs = new ArrayList<String>();
    }

    public VisibleErrorContext(VisibleErrorContext that) {
      super(that);
      this.logs = that.logs;
    }

    @Override
    public void poison(String msg, Object... args) {
      logs.add(String.format(msg, args));
      super.poison(msg, args);
    }

    @Override
    public void poison(String msg, Throwable t) {
      logs.add(msg);
      super.poison(msg, t);
    }

    @Override
    protected VisibleErrorContext fork() {
      return new VisibleErrorContext(this);
    }
  }

  RequestFactoryInterfaceValidator v;;

  private static final boolean DUMP_PAYLOAD = Boolean.getBoolean("gwt.rpc.dumpPayload");;

  private VisibleErrorContext errors;

  /**
   * Ensure that calling {@link RequestFactoryInterfaceValidator#antidote()}
   * doesn't cause information to be lost.
   */
  public void testAntidote() {
    v.validateRequestContext(RequestContextMissingAnnotation.class.getName());
    assertTrue(v.isPoisoned());
    v.antidote();
    assertFalse(v.isPoisoned());
    v.validateRequestContext(RequestContextMissingAnnotation.class.getName());
    assertTrue(v.isPoisoned());
  }

  public void testBadLocatorName() {
    v.validateEntityProxy(LocatorEntityProxyWithBadLocator.class.getName());
    assertTrue(v.isPoisoned());
    assertTrue(errors.logs.contains("Cannot find locator named badLocator"));
  }

  public void testBadServiceName() {
    v.validateEntityProxy(LocatorEntityProxyWithBadServiceName.class.getName());
    assertTrue(v.isPoisoned());
    assertTrue(errors.logs.contains("Cannot find domain type named badDomainType"));
  }

  /**
   * Test that subclasses of {@code java.util.Date} are not transportable.
   */
  public void testDateSubclass() {
    v.validateEntityProxy(DomainWithSqlDateProxy.class.getName());
    assertTrue(v.isPoisoned());
  }

  /**
   * Test the {@link FindRequest} context used to implement find().
   */
  public void testFindRequestContext() {
    v.validateRequestContext(FindRequest.class.getName());
  }

  /**
   * Make sure that proxy types referenced through type parameters of method
   * return types and paramaters types are examined.
   */
  public void testFollowingTypeParameters() {
    v.validateEntityProxy(HasList.class.getName());
    assertNotNull(v.getEntityProxyTypeName(HasListDomain.class.getName(),
        HasList.class.getName()));
    assertNotNull(v.getEntityProxyTypeName(Domain.class.getName(),
        ReachableOnlyThroughParamaterList.class.getName()));
    assertNotNull(v.getEntityProxyTypeName(Domain.class.getName(),
        ReachableOnlyThroughReturnedList.class.getName()));
  }

  /**
   * Ensure that the &lt;clinit> methods don't interfere with validation.
   */
  public void testIntecfacesWithClinits() {
    v.validateRequestFactory(ClinitRequestFactory.class.getName());
    assertFalse(v.isPoisoned());
  }

  public void testLocatorProxy() {
    v.validateEntityProxy(LocatorEntityProxy.class.getName());
    assertFalse(v.isPoisoned());
  }

  public void testMismatchedArity() {
    v.validateRequestContext(ServiceRequestMismatchedArity.class.getName());
    assertTrue(v.isPoisoned());
  }

  public void testMismatchedParamType() {
    v.validateRequestContext(ServiceRequestMismatchedParam.class.getName());
    assertTrue(v.isPoisoned());
  }

  public void testMismatchedReturnType() {
    v.validateRequestContext(ServiceRequestMismatchedReturn.class.getName());
    assertTrue(v.isPoisoned());
  }

  public void testMismatchedStatic() {
    v.validateRequestContext(ServiceRequestMismatchedStatic.class.getName());
    assertTrue(v.isPoisoned());
  }

  public void testMissingDomainAnnotations() {
    v.validateEntityProxy(DomainProxyMissingAnnotation.class.getName());
    assertTrue(v.isPoisoned());
  }

  public void testMissingIdAndVersion() {
    v.validateEntityProxy(DomainProxy.class.getName());
    assertTrue(v.isPoisoned());
  }

  public void testMissingMethod() {
    v.validateRequestContext(ServiceRequestMissingMethod.class.getName());
    assertTrue(v.isPoisoned());
  }

  public void testMissingServiceAnnotations() {
    v.validateRequestContext(RequestContextMissingAnnotation.class.getName());
    assertTrue(v.isPoisoned());
  }

  public void testOverloadedMethod() {
    v.validateEntityProxy(DomainWithOverloadsProxy.class.getName());
    assertTrue(v.isPoisoned());
  }

  /**
   * Perform a full test of the RequestFactory used for most tests.
   */
  public void testTestCodeFactories() {
    v.validateRequestFactory(SimpleRequestFactory.class.getName());
    assertFalse(v.isPoisoned());
  }

  public void testTooManyAnnotations() {
    v.validateRequestContext(TooManyAnnotations.class.getName());
    assertTrue(v.isPoisoned());
  }

  public void testUnexpectedIdAndVersion() {
    v.validateEntityProxy(UnexpectedIdAndVersionProxy.class.getName());
    assertTrue(v.isPoisoned());
  }

  public void testValueType() {
    v.validateValueProxy(MyValueProxy.class.getName());
    assertFalse(v.isPoisoned());
  }

  @Override
  protected void setUp() throws Exception {
    Logger logger = Logger.getLogger("");
    logger.setLevel(DUMP_PAYLOAD ? Level.ALL : Level.OFF);
    errors = new VisibleErrorContext(logger);
    v = new RequestFactoryInterfaceValidator(errors, new ClassLoaderLoader(
        Thread.currentThread().getContextClassLoader()));
  }
}