/*
 * Copyright 2000-2014 JetBrains s.r.o.
 *
 * 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.intellij.util.xml.ui;

import com.intellij.lang.annotation.HighlightSeverity;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.application.Result;
import com.intellij.openapi.application.WriteAction;
import com.intellij.openapi.command.CommandProcessor;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.event.DocumentAdapter;
import com.intellij.openapi.editor.event.DocumentEvent;
import com.intellij.openapi.editor.event.DocumentListener;
import com.intellij.openapi.editor.markup.EffectType;
import com.intellij.openapi.editor.markup.MarkupModel;
import com.intellij.openapi.editor.markup.TextAttributes;
import com.intellij.openapi.project.Project;
import com.intellij.ui.EditorTextField;
import com.intellij.ui.SimpleTextAttributes;
import com.intellij.util.xml.DomElement;
import com.intellij.util.xml.highlighting.DomElementAnnotationsManager;
import com.intellij.util.xml.highlighting.DomElementProblemDescriptor;
import com.intellij.util.xml.highlighting.DomElementsProblemsHolder;
import org.jetbrains.annotations.NotNull;

import javax.swing.*;
import java.awt.*;
import java.util.ArrayList;
import java.util.List;

/**
 * @author peter
 */
public abstract class EditorTextFieldControl<T extends JComponent> extends BaseModifiableControl<T, String> {
  private static final JTextField J_TEXT_FIELD = new JTextField() {
    @Override
    public void addNotify() {
      throw new UnsupportedOperationException("Shouldn't be shown");
    }

    @Override
    public void setVisible(boolean aFlag) {
      throw new UnsupportedOperationException("Shouldn't be shown");
    }
  };
  private final boolean myCommitOnEveryChange;
  private final DocumentListener myListener = new DocumentAdapter() {
    @Override
    public void documentChanged(DocumentEvent e) {
      setModified();
      if (myCommitOnEveryChange) {
        commit();
      }
    }
  };

  protected EditorTextFieldControl(final DomWrapper<String> domWrapper, final boolean commitOnEveryChange) {
    super(domWrapper);
    myCommitOnEveryChange = commitOnEveryChange;
  }


  protected EditorTextFieldControl(final DomWrapper<String> domWrapper) {
    this(domWrapper, false);
  }

  protected abstract EditorTextField getEditorTextField(@NotNull T component);

  @Override
  protected void doReset() {
    final EditorTextField textField = getEditorTextField(getComponent());
    textField.getDocument().removeDocumentListener(myListener);
    super.doReset();
    textField.getDocument().addDocumentListener(myListener);
  }

  @Override
  protected JComponent getComponentToListenFocusLost(final T component) {
    return getEditorTextField(getComponent());
  }

  @Override
  protected JComponent getHighlightedComponent(final T component) {
    return J_TEXT_FIELD;
  }

  @Override
  protected T createMainComponent(T boundedComponent) {
    final Project project = getProject();
    boundedComponent = createMainComponent(boundedComponent, project);

    final EditorTextField editorTextField = getEditorTextField(boundedComponent);
    editorTextField.setSupplementary(true);
    editorTextField.getDocument().addDocumentListener(myListener);
    return boundedComponent;
  }

  protected abstract T createMainComponent(T boundedComponent, Project project);

  @Override
  @NotNull
  protected String getValue() {
    return getEditorTextField(getComponent()).getText();
  }

  @Override
  protected void setValue(final String value) {
    CommandProcessor.getInstance().runUndoTransparentAction(new Runnable() {
      @Override
      public void run() {
        new WriteAction() {
          @Override
          protected void run(Result result) throws Throwable {
            final T component = getComponent();
            final Document document = getEditorTextField(component).getDocument();
            document.replaceString(0, document.getTextLength(), value == null ? "" : value);
          }
        }.execute();
      }
    });
  }

  @Override
  protected void updateComponent() {
    final DomElement domElement = getDomElement();
    if (domElement == null || !domElement.isValid()) return;

    final EditorTextField textField = getEditorTextField(getComponent());
    final Project project = getProject();
    ApplicationManager.getApplication().invokeLater(new Runnable() {
      @Override
      public void run() {
        if (!project.isOpen()) return;
        if (!getDomWrapper().isValid()) return;

        final DomElement domElement = getDomElement();
        if (domElement == null || !domElement.isValid()) return;

        final DomElementAnnotationsManager manager = DomElementAnnotationsManager.getInstance(project);
        final DomElementsProblemsHolder holder = manager.getCachedProblemHolder(domElement);
        final List<DomElementProblemDescriptor> errorProblems = holder.getProblems(domElement);
        final List<DomElementProblemDescriptor> warningProblems = new ArrayList<DomElementProblemDescriptor>(holder.getProblems(domElement, true, HighlightSeverity.WARNING));
        warningProblems.removeAll(errorProblems);

        Color background = getDefaultBackground();
        if (errorProblems.size() > 0 && textField.getText().trim().length() == 0) {
          background = getErrorBackground();
        }
        else if (warningProblems.size() > 0) {
          background = getWarningBackground();
        }

        final Editor editor = textField.getEditor();
        if (editor != null) {
          final MarkupModel markupModel = editor.getMarkupModel();
          markupModel.removeAllHighlighters();
          if (!errorProblems.isEmpty() && editor.getDocument().getLineCount() > 0) {
            final TextAttributes attributes = SimpleTextAttributes.ERROR_ATTRIBUTES.toTextAttributes();
            attributes.setEffectType(EffectType.WAVE_UNDERSCORE);
            attributes.setEffectColor(attributes.getForegroundColor());
            markupModel.addLineHighlighter(0, 0, attributes);
            editor.getContentComponent().setToolTipText(errorProblems.get(0).getDescriptionTemplate());
          }
        }

        textField.setBackground(background);
      }
    });

  }

  @Override
  public boolean canNavigate(final DomElement element) {
    return getDomElement().equals(element);
  }

  @Override
  public void navigate(final DomElement element) {
    final EditorTextField field = getEditorTextField(getComponent());
    SwingUtilities.invokeLater(new Runnable() {
      @Override
      public void run() {
        field.requestFocus();
        field.selectAll();
      }
    });
  }
}