// Copyright (C) 2013 The Android Open Source Project
//
// 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.googlesource.gerrit.plugins.hooks.workflow;

import static org.easymock.EasyMock.expect;
import static org.easymock.EasyMock.expectLastCall;

import com.google.common.collect.Sets;
import com.google.gerrit.server.config.FactoryModule;
import com.google.inject.Guice;
import com.google.inject.Injector;

import com.googlesource.gerrit.plugins.hooks.its.ItsFacade;
import com.googlesource.gerrit.plugins.hooks.testutil.LoggingMockingTestCase;
import com.googlesource.gerrit.plugins.hooks.workflow.action.AddComment;
import com.googlesource.gerrit.plugins.hooks.workflow.action.AddStandardComment;
import com.googlesource.gerrit.plugins.hooks.workflow.action.AddVelocityComment;
import com.googlesource.gerrit.plugins.hooks.workflow.action.LogEvent;

import java.io.IOException;
import java.util.Collections;
import java.util.Set;

public class ActionExecutorTest extends LoggingMockingTestCase {
  private Injector injector;

  private ItsFacade its;
  private AddComment.Factory addCommentFactory;
  private AddStandardComment.Factory addStandardCommentFactory;
  private AddVelocityComment.Factory addVelocityCommentFactory;
  private LogEvent.Factory logEventFactory;

  public void testExecuteItem() throws IOException {
    ActionRequest actionRequest = createMock(ActionRequest.class);
    expect(actionRequest.getName()).andReturn("unparsed");
    expect(actionRequest.getUnparsed()).andReturn("unparsed action 1");

    Set<Property> properties = Collections.emptySet();

    its.performAction("4711", "unparsed action 1");

    replayMocks();

    ActionExecutor actionExecutor = createActionExecutor();
    actionExecutor.execute("4711", actionRequest, properties);
  }

  public void testExecuteItemException() throws IOException {
    ActionRequest actionRequest = createMock(ActionRequest.class);
    expect(actionRequest.getName()).andReturn("unparsed");
    expect(actionRequest.getUnparsed()).andReturn("unparsed action 1");

    Set<Property> properties = Collections.emptySet();

    its.performAction("4711", "unparsed action 1");
    expectLastCall().andThrow(new IOException("injected exception 1"));

    replayMocks();

    ActionExecutor actionExecutor = createActionExecutor();
    actionExecutor.execute("4711", actionRequest, properties);

    assertLogThrowableMessageContains("injected exception 1");
  }

  public void testExecuteIterable() throws IOException {
    ActionRequest actionRequest1 = createMock(ActionRequest.class);
    expect(actionRequest1.getName()).andReturn("unparsed");
    expect(actionRequest1.getUnparsed()).andReturn("unparsed action 1");

    ActionRequest actionRequest2 = createMock(ActionRequest.class);
    expect(actionRequest2.getName()).andReturn("unparsed");
    expect(actionRequest2.getUnparsed()).andReturn("unparsed action 2");

    Set<Property> properties = Collections.emptySet();

    its.performAction("4711", "unparsed action 1");
    its.performAction("4711", "unparsed action 2");

    replayMocks();

    ActionExecutor actionExecutor = createActionExecutor();
    actionExecutor.execute("4711", Sets.newHashSet(
        actionRequest1, actionRequest2), properties);
  }

  public void testExecuteIterableExceptions() throws IOException {
    ActionRequest actionRequest1 = createMock(ActionRequest.class);
    expect(actionRequest1.getName()).andReturn("unparsed");
    expect(actionRequest1.getUnparsed()).andReturn("unparsed action 1");

    ActionRequest actionRequest2 = createMock(ActionRequest.class);
    expect(actionRequest2.getName()).andReturn("unparsed");
    expect(actionRequest2.getUnparsed()).andReturn("unparsed action 2");

    ActionRequest actionRequest3 = createMock(ActionRequest.class);
    expect(actionRequest3.getName()).andReturn("unparsed");
    expect(actionRequest3.getUnparsed()).andReturn("unparsed action 3");

    Set<Property> properties = Collections.emptySet();

    its.performAction("4711", "unparsed action 1");
    expectLastCall().andThrow(new IOException("injected exception 1"));
    its.performAction("4711", "unparsed action 2");
    its.performAction("4711", "unparsed action 3");
    expectLastCall().andThrow(new IOException("injected exception 3"));

    replayMocks();

    ActionExecutor actionExecutor = createActionExecutor();
    actionExecutor.execute("4711", Sets.newHashSet(
        actionRequest1, actionRequest2, actionRequest3), properties);

    assertLogThrowableMessageContains("injected exception 1");
    assertLogThrowableMessageContains("injected exception 3");
  }

  public void testAddCommentDelegation() throws IOException {
    ActionRequest actionRequest = createMock(ActionRequest.class);
    expect(actionRequest.getName()).andReturn("add-comment");

    Set<Property> properties = Collections.emptySet();

    AddComment addComment = createMock(AddComment.class);
    expect(addCommentFactory.create()).andReturn(addComment);

    addComment.execute("4711", actionRequest, properties);

    replayMocks();

    ActionExecutor actionExecutor = createActionExecutor();
    actionExecutor.execute("4711", actionRequest, properties);
  }

  public void testAddStandardCommentDelegation() throws IOException {
    ActionRequest actionRequest = createMock(ActionRequest.class);
    expect(actionRequest.getName()).andReturn("add-standard-comment");

    Set<Property> properties = Collections.emptySet();

    AddStandardComment addStandardComment =
        createMock(AddStandardComment.class);
    expect(addStandardCommentFactory.create()).andReturn(addStandardComment);

    addStandardComment.execute("4711", actionRequest, properties);

    replayMocks();

    ActionExecutor actionExecutor = createActionExecutor();
    actionExecutor.execute("4711", actionRequest, properties);
  }

  public void testAddVelocityCommentDelegation() throws IOException {
    ActionRequest actionRequest = createMock(ActionRequest.class);
    expect(actionRequest.getName()).andReturn("add-velocity-comment");

    Set<Property> properties = Collections.emptySet();

    AddVelocityComment addVelocityComment =
        createMock(AddVelocityComment.class);
    expect(addVelocityCommentFactory.create()).andReturn(addVelocityComment);

    addVelocityComment.execute("4711", actionRequest, properties);

    replayMocks();

    ActionExecutor actionExecutor = createActionExecutor();
    actionExecutor.execute("4711", actionRequest, properties);
  }

  public void testLogEventDelegation() throws IOException {
    ActionRequest actionRequest = createMock(ActionRequest.class);
    expect(actionRequest.getName()).andReturn("log-event");

    Set<Property> properties = Collections.emptySet();

    LogEvent logEvent = createMock(LogEvent.class);
    expect(logEventFactory.create()).andReturn(logEvent);

    logEvent.execute("4711", actionRequest, properties);

    replayMocks();

    ActionExecutor actionExecutor = createActionExecutor();
    actionExecutor.execute("4711", actionRequest, properties);
  }

  private ActionExecutor createActionExecutor() {
    return injector.getInstance(ActionExecutor.class);
  }

  @Override
  public void setUp() throws Exception {
    super.setUp();
    injector = Guice.createInjector(new TestModule());
  }

  private class TestModule extends FactoryModule {
    @Override
    protected void configure() {
      its = createMock(ItsFacade.class);
      bind(ItsFacade.class).toInstance(its);

      addCommentFactory = createMock(AddComment.Factory.class);
      bind(AddComment.Factory.class).toInstance(addCommentFactory);

      addStandardCommentFactory = createMock(AddStandardComment.Factory.class);
      bind(AddStandardComment.Factory.class).toInstance(
          addStandardCommentFactory);

      addVelocityCommentFactory = createMock(AddVelocityComment.Factory.class);
      bind(AddVelocityComment.Factory.class).toInstance(
          addVelocityCommentFactory);

      logEventFactory = createMock(LogEvent.Factory.class);
      bind(LogEvent.Factory.class).toInstance(logEventFactory);
    }
  }
}