/*
 * 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.ide.util.projectWizard;

import com.intellij.ide.IdeBundle;
import com.intellij.ide.highlighter.ProjectFileType;
import com.intellij.ide.util.BrowseFilesListener;
import com.intellij.openapi.application.ApplicationInfo;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.fileChooser.FileChooserDescriptor;
import com.intellij.openapi.options.ConfigurationException;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.Messages;
import com.intellij.openapi.util.io.FileUtil;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.ui.DocumentAdapter;
import com.intellij.ui.FieldPanel;
import com.intellij.util.ui.UIUtil;
import org.jetbrains.annotations.NotNull;

import javax.swing.*;
import javax.swing.event.DocumentEvent;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.PlainDocument;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.io.File;

/**
 * @author Eugene Zhuravlev
 *         Date: Dec 30, 2003
 */
public class NamePathComponent extends JPanel{
  private static final Logger LOG = Logger.getInstance("#com.intellij.ide.util.projectWizard.NamePathComponent");

  private JTextField myTfName;
  private JTextField myTfPath;
  private boolean myIsNameChangedByUser = false;
  private boolean myIsPathChangedByUser = false;
  private boolean myIsPathNameSyncEnabled = true;
  private boolean myIsNamePathSyncEnabled = true;
  private boolean myIsSyncEnabled = true;

  private FieldPanel myPathPanel;
  private JLabel myNameLabel;
  private JLabel myPathLabel;
  private boolean myForceSync;
  private boolean myShouldBeAbsolute;

  public NamePathComponent(String nameLabelText, String pathLabelText, char nameMnemonic, char locationMnemonic, final String pathChooserTitle, final String pathChooserDescription) {
    this(nameLabelText, pathLabelText, pathChooserTitle, pathChooserDescription, true);
  }

  public NamePathComponent(String nameLabelText,
                           String pathLabelText,
                           final String pathChooserTitle,
                           final String pathChooserDescription,
                           boolean hideIgnored) {
    this(nameLabelText, pathLabelText, pathChooserTitle, pathChooserDescription, hideIgnored, true);
  }

  public NamePathComponent(String nameLabelText,
                           String pathLabelText,
                           final String pathChooserTitle,
                           final String pathChooserDescription,
                           boolean hideIgnored,
                           boolean bold) {
    super(new GridBagLayout());

    myTfName = new JTextField();
    myTfName.setDocument(new NameFieldDocument());
    myTfName.setPreferredSize(new Dimension(200, myTfName.getPreferredSize().height));

    myTfPath = new JTextField();
    myTfPath.setDocument(new PathFieldDocument());
    myTfPath.setPreferredSize(new Dimension(200, myTfPath.getPreferredSize().height));

    myNameLabel = new JLabel(nameLabelText);
    if (bold) myNameLabel.setFont(UIUtil.getLabelFont().deriveFont(Font.BOLD));
    myNameLabel.setLabelFor(myTfName);
    Insets insets = new Insets(0, 0, 5, 4);
    this.add(myNameLabel, new GridBagConstraints(0, GridBagConstraints.RELATIVE, 1, 1, 0.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.NONE,
                                                 insets, 0, 0));

    insets = new Insets(0, 0, 5, 0);
    this.add(myTfName, new GridBagConstraints(1, GridBagConstraints.RELATIVE, 1, 1, 1.0, 0.0, GridBagConstraints.NORTHWEST, GridBagConstraints.HORIZONTAL,
                                              insets, 0, 0));
    // todo: review texts
    final FileChooserDescriptor chooserDescriptor = (FileChooserDescriptor)BrowseFilesListener.SINGLE_DIRECTORY_DESCRIPTOR.clone();
    chooserDescriptor.setHideIgnored(hideIgnored);
    final BrowseFilesListener browseButtonActionListener = new BrowseFilesListener(myTfPath, pathChooserTitle, pathChooserDescription, chooserDescriptor) {
      public void actionPerformed(ActionEvent e) {
        super.actionPerformed(e);
        myIsPathChangedByUser = true;
      }
    };
    myPathPanel = new FieldPanel(myTfPath, null, null, browseButtonActionListener, null);
    myPathLabel = new JLabel(pathLabelText);
    myPathLabel.setLabelFor(myTfPath);
    if (bold) myPathLabel.setFont(UIUtil.getLabelFont().deriveFont(Font.BOLD));
    insets = new Insets(0, 0, 5, 4);
    this.add(myPathLabel, new GridBagConstraints(0, GridBagConstraints.RELATIVE, 1, 1, 0.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.NONE,
                                                   insets, 0, 0));
    insets = new Insets(0, 0, 5, 0);
    this.add(myPathPanel, new GridBagConstraints(1, GridBagConstraints.RELATIVE, 1, 1, 1.0, 0.0, GridBagConstraints.NORTHWEST, GridBagConstraints.HORIZONTAL,
                                                 insets, 0, 0));
  }

  public static NamePathComponent initNamePathComponent(WizardContext context) {
    NamePathComponent component = new NamePathComponent(
      IdeBundle.message("label.project.name"),
      IdeBundle.message("label.project.files.location"),
      IdeBundle.message("title.select.project.file.directory", IdeBundle.message("project.new.wizard.project.identification")),
      IdeBundle.message("description.select.project.file.directory", StringUtil
        .capitalize(IdeBundle.message("project.new.wizard.project.identification"))),
      true, false
    );
    final String baseDir = context.getProjectFileDirectory();
    final String projectName = context.getProjectName();
    final String initialProjectName = projectName != null ? projectName : ProjectWizardUtil.findNonExistingFileName(baseDir, "untitled", "");
    component.setPath(projectName == null ? (baseDir + File.separator + initialProjectName) : baseDir);
    component.setNameValue(initialProjectName);
    component.getNameComponent().select(0, initialProjectName.length());
    return component;
  }

  public boolean validateNameAndPath(WizardContext context, boolean defaultFormat) throws ConfigurationException {
    String name = getNameValue();
    if (StringUtil.isEmptyOrSpaces(name)) {
      ApplicationInfo info = ApplicationInfo.getInstance();
      throw new ConfigurationException(IdeBundle.message("prompt.new.project.file.name", info.getVersionName(), context.getPresentationName()));
    }

    String projectDirectory = getPath();
    if (StringUtil.isEmptyOrSpaces(projectDirectory)) {
      throw new ConfigurationException(IdeBundle.message("prompt.enter.project.file.location", context.getPresentationName()));
    }
    if (myShouldBeAbsolute && !new File(projectDirectory).isAbsolute()) {
      throw new ConfigurationException(StringUtil.capitalize(IdeBundle.message("file.location.should.be.absolute", context.getPresentationName())));
    }

    boolean shouldPromptCreation = isPathChangedByUser();
    String message = IdeBundle.message("directory.project.file.directory", context.getPresentationName());
    if (!ProjectWizardUtil.createDirectoryIfNotExists(message, projectDirectory, shouldPromptCreation)) {
      return false;
    }

    File file = new File(projectDirectory);
    if (file.exists() && !file.canWrite()) {
      throw new ConfigurationException(String.format("Directory '%s' is not writable!\nPlease choose another project location.", projectDirectory));
    }

    boolean shouldContinue = true;
    String fileName = defaultFormat ? name + ProjectFileType.DOT_DEFAULT_EXTENSION : Project.DIRECTORY_STORE_FOLDER;
    File projectFile = new File(file, fileName);
    if (projectFile.exists()) {
      message = IdeBundle.message("prompt.overwrite.project.file", projectFile.getAbsolutePath(), context.getPresentationName());
      int answer = Messages.showYesNoDialog(message, IdeBundle.message("title.file.already.exists"), Messages.getQuestionIcon());
      shouldContinue = (answer == Messages.YES);
    }
    return shouldContinue;
  }

  public String getNameValue() {
    return myTfName.getText().trim();
  }

  public void setNameValue(String name) {
    final boolean isNameChangedByUser = myIsNameChangedByUser;
    setNamePathSyncEnabled(false);
    try {
      myTfName.setText(name);
    }
    finally {
      myIsNameChangedByUser = isNameChangedByUser;
      setNamePathSyncEnabled(true);
    }
  }

  public String getPath() {
    String text = myTfPath.getText().trim();
    return FileUtil.expandUserHome(FileUtil.toSystemIndependentName(text));
  }

  public void setPath(String path) {
    final boolean isPathChangedByUser = myIsPathChangedByUser;
    setPathNameSyncEnabled(false);
    try {
      myTfPath.setText(FileUtil.getLocationRelativeToUserHome(FileUtil.toSystemDependentName(path)));
    }
    finally {
      myIsPathChangedByUser = isPathChangedByUser;
      setPathNameSyncEnabled(true);
    }
  }

  public JTextField getNameComponent() {
    return myTfName;
  }
  
  @NotNull
  public JLabel getPathLabel() {
    return myPathLabel;
  }

  public JTextField getPathComponent() {
    return myTfPath;
  }
  
  @NotNull
  public FieldPanel getPathPanel() {
    return myPathPanel;
  }

  public void setPathComponentVisible(boolean visible) {
    myPathPanel.setVisible(visible);
  }

  public void setNameComponentVisible(boolean visible) {
    myTfName.setVisible(visible);
    myNameLabel.setVisible(visible);
  }

  public boolean isNameChangedByUser() {
    return myIsNameChangedByUser;
  }

  public boolean isPathChangedByUser() {
    return myIsPathChangedByUser;
  }

  public boolean isSyncEnabled() {
    return myIsSyncEnabled;
  }

  public void setSyncEnabled(boolean isSyncEnabled) {
    myIsSyncEnabled = isSyncEnabled;
  }

  private boolean isPathNameSyncEnabled() {
    if (!isSyncEnabled()) {
      return false;
    }
    return myIsPathNameSyncEnabled;
  }

  private void setPathNameSyncEnabled(boolean isPathNameSyncEnabled) {
    myIsPathNameSyncEnabled = isPathNameSyncEnabled;
  }

  private boolean isNamePathSyncEnabled() {
    if (!isSyncEnabled()) {
      return false;
    }
    return myIsNamePathSyncEnabled;
  }

  private void setNamePathSyncEnabled(boolean isNamePathSyncEnabled) {
    myIsNamePathSyncEnabled = isNamePathSyncEnabled;
  }

  public void syncNameToPath(boolean b) {
    myForceSync = b;
    if (b) ((PathFieldDocument)myTfPath.getDocument()).syncPathAndName();
  }

  public void addChangeListener(final Runnable callback) {
    DocumentAdapter adapter = new DocumentAdapter() {
      @Override
      protected void textChanged(DocumentEvent e) {
        callback.run();
      }
    };
    myTfName.getDocument().addDocumentListener(adapter);
    myTfPath.getDocument().addDocumentListener(adapter);
  }

  public void setShouldBeAbsolute(boolean shouldBeAbsolute) {
    myShouldBeAbsolute = shouldBeAbsolute;
  }

  private class NameFieldDocument extends PlainDocument {
    public NameFieldDocument() {
      addDocumentListener(new DocumentAdapter() {
        public void textChanged(DocumentEvent event) {
          myIsNameChangedByUser = true;
          syncNameAndPath();
        }
      });
    }

    public void insertString(int offs, String str, AttributeSet a) throws BadLocationException {
      boolean ok = true;
      for (int idx = 0; idx < str.length() && ok; idx++) {
        char ch = str.charAt(idx);
        ok = ch != File.separatorChar && ch != '\\' && ch != '/' && ch != '|' && ch != ':';
      }
      if (ok) {
        super.insertString(offs, str, a);
      }
    }

    private void syncNameAndPath() {
      if (isNamePathSyncEnabled() && (myForceSync || !myIsPathChangedByUser)) {
        try {
          setPathNameSyncEnabled(false);
          final String name = getText(0, getLength());
          final String path = myTfPath.getText().trim();
          final int lastSeparatorIndex = path.lastIndexOf(File.separator);
          if (lastSeparatorIndex >= 0) {
            setPath(path.substring(0, lastSeparatorIndex + 1) + name);
          }
        }
        catch (BadLocationException e) {
          LOG.error(e);
        }
        finally {
          setPathNameSyncEnabled(true);
        }
      }
    }
  }

  private class PathFieldDocument extends PlainDocument {
    public PathFieldDocument() {
      addDocumentListener(new DocumentAdapter() {
        public void textChanged(DocumentEvent event) {
          myIsPathChangedByUser = true;
          syncPathAndName();
        }
      });
    }

    private void syncPathAndName() {
      if (isPathNameSyncEnabled() && (myForceSync || !myIsNameChangedByUser)) {
        try {
          setNamePathSyncEnabled(false);
          final String path = getText(0, getLength());
          final int lastSeparatorIndex = path.lastIndexOf(File.separator);
          if (lastSeparatorIndex >= 0 && (lastSeparatorIndex + 1) < path.length()) {
            setNameValue(path.substring(lastSeparatorIndex + 1));
          }
        }
        catch (BadLocationException e) {
          LOG.error(e);
        }
        finally {
          setNamePathSyncEnabled(true);
        }
      }
    }
  }

}