/*
 * Copyright 2000-2009 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 org.jetbrains.idea.svn.dialogs;

import com.intellij.openapi.actionSystem.ActionToolbarPosition;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.DialogWrapper;
import com.intellij.openapi.ui.Messages;
import com.intellij.openapi.ui.MultiLineLabelUI;
import com.intellij.openapi.ui.TextFieldWithBrowseButton;
import com.intellij.openapi.vcs.VcsException;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.ui.*;
import com.intellij.ui.components.JBList;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.idea.svn.*;
import org.jetbrains.idea.svn.branchConfig.InfoReliability;
import org.jetbrains.idea.svn.branchConfig.InfoStorage;
import org.jetbrains.idea.svn.branchConfig.SvnBranchConfigManager;
import org.jetbrains.idea.svn.branchConfig.SvnBranchConfigurationNew;
import org.jetbrains.idea.svn.commandLine.SvnBindException;
import org.jetbrains.idea.svn.integrate.SvnBranchItem;
import org.tmatesoft.svn.core.SVNURL;
import org.tmatesoft.svn.core.internal.util.SVNURLUtil;

import javax.swing.*;
import javax.swing.event.DocumentEvent;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.util.ArrayList;
import java.util.List;

/**
 * @author yole
 */
public class BranchConfigurationDialog extends DialogWrapper {
  private JPanel myTopPanel;
  private TextFieldWithBrowseButton myTrunkLocationTextField;
  private JList myLocationList;
  private JPanel myListPanel;
  private JLabel myErrorPrompt;
  private final SvnBranchConfigManager mySvnBranchConfigManager;
  private final VirtualFile myRoot;

  public BranchConfigurationDialog(@NotNull final Project project,
                                   @NotNull final SvnBranchConfigurationNew configuration,
                                   final @NotNull SVNURL rootUrl,
                                   @NotNull final VirtualFile root,
                                   @NotNull String url) {
    super(project, true);
    myRoot = root;
    init();
    setTitle(SvnBundle.message("configure.branches.title"));

    final String trunkUrl = configuration.getTrunkUrl();
    if (trunkUrl == null || trunkUrl.trim().length() == 0) {
      configuration.setTrunkUrl(url);
    }

    mySvnBranchConfigManager = SvnBranchConfigurationManager.getInstance(project).getSvnBranchConfigManager();

    myTrunkLocationTextField.setText(configuration.getTrunkUrl());
    myTrunkLocationTextField.addActionListener(new ActionListener() {
      public void actionPerformed(final ActionEvent e) {
        final String selectedUrl = SelectLocationDialog.selectLocation(project, myTrunkLocationTextField.getText());
        if (selectedUrl != null) {
          myTrunkLocationTextField.setText(selectedUrl);
        }
      }
    });

    final TrunkUrlValidator trunkUrlValidator = new TrunkUrlValidator(rootUrl, configuration);
    myTrunkLocationTextField.getTextField().getDocument().addDocumentListener(trunkUrlValidator);
    trunkUrlValidator.textChanged(null);

    myErrorPrompt.setUI(new MultiLineLabelUI());
    myErrorPrompt.setForeground(SimpleTextAttributes.ERROR_ATTRIBUTES.getFgColor());

    final MyListModel listModel = new MyListModel(configuration);
    myLocationList = new JBList(listModel);

    myListPanel.add(
      ToolbarDecorator.createDecorator(myLocationList)
        .setAddAction(new AnActionButtonRunnable() {
          @Override
          public void run(AnActionButton button) {
            final String selectedUrl = SelectLocationDialog.selectLocation(project, rootUrl.toDecodedString());
            if (selectedUrl != null) {
              if (!configuration.getBranchUrls().contains(selectedUrl)) {
                configuration
                  .addBranches(selectedUrl, new InfoStorage<List<SvnBranchItem>>(new ArrayList<SvnBranchItem>(), InfoReliability.empty));
                mySvnBranchConfigManager.reloadBranches(myRoot, selectedUrl, null);
                listModel.fireItemAdded();
                myLocationList.setSelectedIndex(listModel.getSize() - 1);
              }
            }
          }
        }).setRemoveAction(new AnActionButtonRunnable() {
        @Override
        public void run(AnActionButton button) {
          int selIndex = myLocationList.getSelectedIndex();
          Object[] selection = myLocationList.getSelectedValues();
          for (Object urlObj : selection) {
            String url = (String)urlObj;
            int index = configuration.getBranchUrls().indexOf(url);
            configuration.removeBranch(url);
            listModel.fireItemRemoved(index);
          }
          if (listModel.getSize() > 0) {
            if (selIndex >= listModel.getSize())
              selIndex = listModel.getSize() - 1;
            myLocationList.setSelectedIndex(selIndex);
          }
        }
      }).disableUpDownActions().setToolbarPosition(ActionToolbarPosition.BOTTOM).createPanel(), BorderLayout.CENTER);
  }

  private class TrunkUrlValidator extends DocumentAdapter {
    private final SVNURL myRootUrl;
    private final SvnBranchConfigurationNew myConfiguration;

    private TrunkUrlValidator(final SVNURL rootUrl, final SvnBranchConfigurationNew configuration) {
      myRootUrl = rootUrl;
      myConfiguration = configuration;
    }

    protected void textChanged(final DocumentEvent e) {
      SVNURL url = parseUrl(myTrunkLocationTextField.getText());

      if (url != null) {
        boolean isAncestor = SVNURLUtil.isAncestor(myRootUrl, url);
        boolean areNotSame = isAncestor && !url.equals(myRootUrl);

        myTrunkLocationTextField.getButton().setEnabled(isAncestor);
        if (areNotSame) {
          myConfiguration.setTrunkUrl(url.toDecodedString());
        }
        myErrorPrompt.setText(areNotSame ? "" : SvnBundle.message("configure.branches.error.wrong.url", myRootUrl));
      }
    }

    @Nullable
    private SVNURL parseUrl(@NotNull String url) {
      SVNURL result = null;

      try {
        result = SvnUtil.createUrl(url);
      }
      catch (SvnBindException e) {
        myErrorPrompt.setText(e.getMessage());
      }

      return result;
    }
  }

  @Nullable
  protected JComponent createCenterPanel() {
    return myTopPanel;
  }

  @Override
  @NonNls
  protected String getDimensionServiceKey() {
    return "Subversion.BranchConfigurationDialog";
  }

  public static void configureBranches(final Project project, final VirtualFile file) {
    configureBranches(project, file, false);
  }

  public static void configureBranches(final Project project, final VirtualFile file, final boolean isRoot) {
    final VirtualFile vcsRoot = (isRoot) ? file : getRoot(project, file);
    if (vcsRoot == null) {
      return;
    }

    final VirtualFile directory = SvnUtil.correctRoot(project, file);
    if (directory == null) {
      return;
    }
    final RootUrlInfo wcRoot = SvnVcs.getInstance(project).getSvnFileUrlMapping().getWcRootForFilePath(new File(directory.getPath()));
    if (wcRoot == null) {
      return;
    }
    final SVNURL rootUrl = wcRoot.getRepositoryUrlUrl();
    if (rootUrl == null) {
      Messages.showErrorDialog(project, SvnBundle.message("configure.branches.error.no.connection.title"),
                               SvnBundle.message("configure.branches.title"));
      return;
    }

    SvnBranchConfigurationNew configuration;
    try {
      configuration = SvnBranchConfigurationManager.getInstance(project).get(vcsRoot);
    }
    catch (VcsException ex) {
      Messages.showErrorDialog(project, "Error loading branch configuration: " + ex.getMessage(),
                               SvnBundle.message("configure.branches.title"));
      return;
    }

    final SvnBranchConfigurationNew clonedConfiguration = configuration.copy();
    BranchConfigurationDialog dlg = new BranchConfigurationDialog(project, clonedConfiguration, rootUrl, vcsRoot, wcRoot.getUrl());
    dlg.show();
    if (dlg.isOK()) {
      SvnBranchConfigurationManager.getInstance(project).setConfiguration(vcsRoot, clonedConfiguration);
    }
  }

  private static VirtualFile getRoot(Project project, VirtualFile file) {
    RootUrlInfo path = SvnVcs.getInstance(project).getSvnFileUrlMapping().getWcRootForFilePath(new File(file.getPath()));
    return path == null ? null : path.getVirtualFile();
  }

  private static class MyListModel extends AbstractListModel {
    private final SvnBranchConfigurationNew myConfiguration;
    private List<String> myBranchUrls;

    public MyListModel(final SvnBranchConfigurationNew configuration) {
      myConfiguration = configuration;
      myBranchUrls = myConfiguration.getBranchUrls();
    }

    public int getSize() {
      return myBranchUrls.size();
    }

    public Object getElementAt(final int index) {
      return myBranchUrls.get(index);
    }

    public void fireItemAdded() {
      final int index = myConfiguration.getBranchUrls().size() - 1;
      myBranchUrls = myConfiguration.getBranchUrls();
      super.fireIntervalAdded(this, index, index);
    }

    public void fireItemRemoved(final int index) {
      myBranchUrls = myConfiguration.getBranchUrls();
      super.fireIntervalRemoved(this, index, index);
    }
  }
}