/*
 * 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.web.bindery.requestfactory.gwt.client.ui;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.RepeatingCommand;
import com.google.gwt.editor.client.Editor;
import com.google.gwt.editor.client.EditorDelegate;
import com.google.gwt.editor.client.EditorError;
import com.google.gwt.editor.client.HasEditorDelegate;
import com.google.gwt.editor.client.HasEditorErrors;
import com.google.gwt.editor.client.adapters.EditorSource;
import com.google.gwt.editor.client.adapters.ListEditor;
import com.google.gwt.editor.client.adapters.SimpleEditor;
import com.google.web.bindery.requestfactory.gwt.client.HasRequestContext;
import com.google.web.bindery.requestfactory.gwt.client.RequestFactoryEditorDriver;
import com.google.web.bindery.requestfactory.gwt.client.RequestFactoryTestBase;
import com.google.web.bindery.requestfactory.shared.Receiver;
import com.google.web.bindery.requestfactory.shared.Request;
import com.google.web.bindery.requestfactory.shared.RequestContext;
import com.google.web.bindery.requestfactory.shared.SimpleBarProxy;
import com.google.web.bindery.requestfactory.shared.SimpleFooProxy;
import com.google.web.bindery.requestfactory.shared.SimpleFooRequest;
import com.google.web.bindery.requestfactory.shared.Violation;

import java.util.Arrays;
import java.util.List;
import java.util.Set;

/**
 * Integration test of the Editor framework. Only tests for
 * RequestFactory-specific features belong here; all other tests should use the
 * SimpleBeanEditorDriver to make the tests simpler.
 */
public class EditorTest extends RequestFactoryTestBase {
  /*
   * DO NOT USE finishTest(). Instead, call finishTestAndReset();
   */

  static class SimpleBarEditor implements Editor<SimpleBarProxy>,
      HasRequestContext<SimpleBarProxy> {
    protected final SimpleEditor<String> userName = SimpleEditor.of();
    RequestContext ctx;

    public void setRequestContext(RequestContext ctx) {
      this.ctx = ctx;
    }
  }

  static class SimpleFooBarNameOnlyEditor implements Editor<SimpleFooProxy> {
    /**
     * Test nested path access.
     */
    @Path("barField.userName")
    final SimpleEditor<String> barName = SimpleEditor.of();
  }

  interface SimpleFooDriver extends
      RequestFactoryEditorDriver<SimpleFooProxy, SimpleFooEditor> {
  }

  static class SimpleFooEditor implements HasEditorErrors<SimpleFooProxy> {
    /**
     * Test field-based access.
     */
    final SimpleEditor<String> userName = SimpleEditor.of();

    /**
     * Test nested path access.
     */
    @Path("barField.userName")
    final SimpleEditor<String> barName = SimpleEditor.of();

    final ListEditor<SimpleFooProxy, SimpleFooBarNameOnlyEditor> selfOneToManyField = ListEditor.of(new EditorSource<SimpleFooBarNameOnlyEditor>() {
      @Override
      public SimpleFooBarNameOnlyEditor create(int index) {
        return new SimpleFooBarNameOnlyEditor();
      }
    });

    private final SimpleBarEditor barEditor = new SimpleBarEditor();

    List<EditorError> errors;

    public void showErrors(List<EditorError> errors) {
      this.errors = errors;
    }

    /**
     * Test method-based access with path override.
     */
    @Path("barField")
    SimpleBarEditor barEditor() {
      return barEditor;
    }
  }

  static class SimpleFooEditorWithDelegate extends SimpleFooEditor implements
      HasEditorDelegate<SimpleFooProxy> {
    EditorDelegate<SimpleFooProxy> delegate;

    public void setDelegate(EditorDelegate<SimpleFooProxy> delegate) {
      this.delegate = delegate;
    }
  }

  private static final int TEST_TIMEOUT = 5000;

  @Override
  public String getModuleName() {
    return "com.google.web.bindery.requestfactory.gwt.RequestFactorySuite";
  }

  public void test() {
    delayTestFinish(TEST_TIMEOUT);
    final SimpleFooEditor editor = new SimpleFooEditor();

    final SimpleFooDriver driver = GWT.create(SimpleFooDriver.class);
    driver.initialize(req, editor);
    final String[] paths = driver.getPaths();
    assertEquals(Arrays.asList("barField", "selfOneToManyField",
        "selfOneToManyField.barField"), Arrays.asList(paths));

    req.simpleFooRequest().findSimpleFooById(1L).with(paths).fire(
        new Receiver<SimpleFooProxy>() {
          @Override
          public void onSuccess(SimpleFooProxy response) {

            SimpleFooRequest context = req.simpleFooRequest();
            driver.edit(response, context);
            assertSame(context, editor.barEditor().ctx);
            context.persistAndReturnSelf().using(response).with(paths).to(
                new Receiver<SimpleFooProxy>() {
                  @Override
                  public void onSuccess(SimpleFooProxy response) {
                    assertEquals("EditorFooTest", response.getUserName());
                    assertEquals("EditorBarTest",
                        response.getBarField().getUserName());
                    finishTestAndReset();
                  }
                });
            assertEquals("GWT", editor.userName.getValue());
            assertEquals("FOO", editor.barEditor().userName.getValue());
            assertEquals("FOO", editor.barName.getValue());
            editor.userName.setValue("EditorFooTest");
            // When there are duplicate paths, last declared editor wins
            editor.barEditor().userName.setValue("EditorBarTest");
            editor.barName.setValue("ignored 1");
            editor.selfOneToManyField.getEditors().get(0).barName.setValue(
                "ignored 2");
            driver.flush().fire();
          }
        });
  }

  public void testNoSubscription() {
    final SimpleFooEditorWithDelegate editor = new SimpleFooEditorWithDelegate();

    final SimpleFooDriver driver = GWT.create(SimpleFooDriver.class);
    driver.initialize(req, editor);

    /*
     * Confirm that it's always safe to call subscribe. The editor's delegate
     * isn't set until edit is called, so edit nothing.
     */
    driver.edit(null, null);
    assertNull(editor.delegate.subscribe());
  }

  /**
   * Tests the editor can be re-used while the initial context is locked and
   * therefore its attached proxies are frozen..
   * 
   * @see http://code.google.com/p/google-web-toolkit/issues/detail?id=5752
   */
  public void testReuse() {
    delayTestFinish(TEST_TIMEOUT);
    final SimpleFooEditor editor = new SimpleFooEditor();

    final SimpleFooDriver driver = GWT.create(SimpleFooDriver.class);
    driver.initialize(req, editor);

    req.simpleFooRequest().findSimpleFooById(1L).with(driver.getPaths()).fire(
        new Receiver<SimpleFooProxy>() {
          @Override
          public void onSuccess(SimpleFooProxy response) {

            SimpleFooRequest context = req.simpleFooRequest();
            driver.edit(response, context);
            editor.userName.setValue("One");
            context.persistAndReturnSelf().using(response).with(
                driver.getPaths()).to(new Receiver<SimpleFooProxy>() {
              @Override
              public void onSuccess(SimpleFooProxy response) {
                assertEquals("One", response.getUserName());
                // just testing that it doesn't throw (see issue 5752)
                driver.edit(response, req.simpleFooRequest());
                editor.userName.setValue("Two");
                driver.flush();
                finishTestAndReset();
              }
            });
            // The fire() will freeze the proxies and lock the context
            driver.flush().fire();
          }
        });
  }

  public void testSubscription() {
    delayTestFinish(TEST_TIMEOUT);
    final SimpleFooEditorWithDelegate editor = new SimpleFooEditorWithDelegate();

    final SimpleFooDriver driver = GWT.create(SimpleFooDriver.class);
    driver.initialize(req, editor);

    String[] paths = driver.getPaths();
    assertEquals(Arrays.asList("barField", "selfOneToManyField",
        "selfOneToManyField.barField"), Arrays.asList(paths));

    req.simpleFooRequest().findSimpleFooById(1L).with(paths).fire(
        new Receiver<SimpleFooProxy>() {
          @Override
          public void onSuccess(SimpleFooProxy response) {
            // Set up driver in read-only mode
            driver.edit(response, null);
            assertNotNull(editor.delegate.subscribe());

            // Simulate edits occurring elsewhere in the module
            SimpleFooRequest context = req.simpleFooRequest();
            Request<SimpleFooProxy> request = context.persistAndReturnSelf().using(
                response);
            SimpleBarProxy newBar = context.create(SimpleBarProxy.class);
            newBar = context.edit(newBar);
            newBar.setUserName("newBar");
            response = context.edit(response);
            response.setBarField(newBar);
            response.setUserName("updated");

            request.fire(new Receiver<SimpleFooProxy>() {
              @Override
              public void onSuccess(SimpleFooProxy response) {
                // EventBus notifications occur after the onSuccess()
                Scheduler.get().scheduleFixedDelay(new RepeatingCommand() {
                  public boolean execute() {
                    if ("updated".equals(editor.userName.getValue())) {
                      assertEquals("updated", editor.userName.getValue());
                      assertEquals("newBar",
                          editor.barEditor().userName.getValue());
                      finishTestAndReset();
                      return false;
                    }
                    return true;
                  }
                }, 50);
              }
            });
          }
        });
  }

  public void testViolations() {
    delayTestFinish(TEST_TIMEOUT);
    final SimpleFooEditor editor = new SimpleFooEditor();

    final SimpleFooDriver driver = GWT.create(SimpleFooDriver.class);
    driver.initialize(req, editor);

    req.simpleFooRequest().findSimpleFooById(1L).with(driver.getPaths()).fire(
        new Receiver<SimpleFooProxy>() {
          @Override
          public void onSuccess(SimpleFooProxy response) {

            SimpleFooRequest context = req.simpleFooRequest();
            driver.edit(response, context);
            context.persistAndReturnSelf().using(response).with(
                driver.getPaths()).to(new Receiver<SimpleFooProxy>() {
              @Override
              public void onSuccess(SimpleFooProxy response) {
                fail("Expected errors. You may be missing jars, see "
                    + "the comment in RequestFactoryTest.ShouldNotSucceedReceiver.onSuccess");
              }

              @Override
              public void onViolation(Set<Violation> errors) {
                assertEquals(1, errors.size());
                Violation v = errors.iterator().next();

                driver.setViolations(errors);
                assertEquals(1, editor.errors.size());
                EditorError error = editor.errors.get(0);
                assertEquals("userName", error.getAbsolutePath());
                assertSame(editor.userName, error.getEditor());
                assertTrue(error.getMessage().length() > 0);
                assertEquals("userName", error.getPath());
                assertSame(v, error.getUserData());
                assertNull(error.getValue());
                finishTestAndReset();
              }
            });
            // Set to an illegal value
            editor.userName.setValue("");

            driver.flush().fire();
          }
        });
  }
}