/*
 * Copyright 2000-2012 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 git4idea.branch;

import com.intellij.notification.Notification;
import com.intellij.notification.NotificationListener;
import com.intellij.notification.NotificationType;
import com.intellij.openapi.components.ServiceManager;
import com.intellij.openapi.progress.ProgressIndicator;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.Messages;
import com.intellij.openapi.ui.VerticalFlowLayout;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.openapi.vcs.changes.Change;
import com.intellij.openapi.vcs.changes.ui.SelectFilesDialog;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.ui.components.JBLabel;
import com.intellij.util.ui.UIUtil;
import com.intellij.xml.util.XmlStringUtil;
import git4idea.*;
import git4idea.commands.Git;
import git4idea.merge.GitConflictResolver;
import git4idea.repo.GitRepository;
import git4idea.util.UntrackedFilesNotifier;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import javax.swing.*;
import javax.swing.event.HyperlinkEvent;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicBoolean;

/**
 * @author Kirill Likhodedov
 */
public class GitBranchUiHandlerImpl implements GitBranchUiHandler {

  @NotNull private final Project myProject;
  @NotNull private final Git myGit;
  @NotNull private final GitPlatformFacade myFacade;
  @NotNull private final ProgressIndicator myProgressIndicator;

  public GitBranchUiHandlerImpl(@NotNull Project project, @NotNull GitPlatformFacade facade, @NotNull Git git, @NotNull ProgressIndicator indicator) {
    myProject = project;
    myGit = git;
    myFacade = facade;
    myProgressIndicator = indicator;
  }

  @Override
  public void notifySuccess(@NotNull String message) {
    notifySuccess("", message);
  }

  @Override
  public void notifySuccess(@NotNull String title, @NotNull String message) {
    notifySuccess(title, message, null);
  }

  @Override
  public void notifySuccess(@NotNull String title, @NotNull String description, @Nullable NotificationListener listener) {
    Notificator.getInstance(myProject).notify(GitVcs.NOTIFICATION_GROUP_ID, title, description, NotificationType.INFORMATION, listener);
  }

  @Override
  public void notifyError(@NotNull String title, @NotNull String message) {
    Notificator.getInstance(myProject).notify(GitVcs.IMPORTANT_ERROR_NOTIFICATION, title, message, NotificationType.ERROR);
  }

  @Override
  public boolean notifyErrorWithRollbackProposal(@NotNull final String title, @NotNull final String message,
                                                 @NotNull final String rollbackProposal) {
    final AtomicBoolean ok = new AtomicBoolean();
    UIUtil.invokeAndWaitIfNeeded(new Runnable() {
      @Override
      public void run() {
        StringBuilder description = new StringBuilder();
        if (!StringUtil.isEmptyOrSpaces(message)) {
          description.append(message).append("<br/>");
        }
        description.append(rollbackProposal);
        ok.set(Messages.OK == MessageManager.showYesNoDialog(myProject, XmlStringUtil.wrapInHtml(description), title,
                                                             "Rollback", "Don't rollback", Messages.getErrorIcon()));
      }
    });
    return ok.get();
  }

  @Override
  public void showUnmergedFilesNotification(@NotNull final String operationName, @NotNull final Collection<GitRepository> repositories) {
    String title = unmergedFilesErrorTitle(operationName);
    String description = unmergedFilesErrorNotificationDescription(operationName);
    Notificator.getInstance(myProject).notify(GitVcs.IMPORTANT_ERROR_NOTIFICATION, title, description, NotificationType.ERROR,
      new NotificationListener() {
        @Override
        public void hyperlinkUpdate(@NotNull Notification notification,
                                    @NotNull HyperlinkEvent event) {
          if (event.getEventType() == HyperlinkEvent.EventType.ACTIVATED && event.getDescription().equals("resolve")) {
            GitConflictResolver.Params params = new GitConflictResolver.Params().
              setMergeDescription(String.format("The following files have unresolved conflicts. You need to resolve them before %s.",
                                                operationName)).
              setErrorNotificationTitle("Unresolved files remain.");
            new GitConflictResolver(myProject, myGit, myFacade, GitUtil.getRootsFromRepositories(repositories), params).merge();
          }
        }
      }
    );
  }

  @Override
  public boolean showUnmergedFilesMessageWithRollback(@NotNull final String operationName, @NotNull final String rollbackProposal) {
    final AtomicBoolean ok = new AtomicBoolean();
    UIUtil.invokeAndWaitIfNeeded(new Runnable() {
      @Override
      public void run() {
        String description = String.format("<html>You have to resolve all merge conflicts before %s.<br/>%s</html>",
                                           operationName, rollbackProposal);
        // suppressing: this message looks ugly if capitalized by words
        //noinspection DialogTitleCapitalization
        ok.set(Messages.OK == MessageManager.showYesNoDialog(myProject, description, unmergedFilesErrorTitle(operationName),
                                                             "Rollback", "Don't rollback", Messages.getErrorIcon()));
      }
    });
    return ok.get();
  }

  @Override
  public void showUntrackedFilesNotification(@NotNull String operationName, @NotNull Collection<VirtualFile> untrackedFiles) {
    UntrackedFilesNotifier.notifyUntrackedFilesOverwrittenBy(myProject, ServiceManager.getService(myProject, GitPlatformFacade.class),
                                                             untrackedFiles, operationName, null);
  }

  @Override
  public boolean showUntrackedFilesDialogWithRollback(@NotNull String operationName, @NotNull String rollbackProposal,
                                                      @NotNull Collection<VirtualFile> untrackedFiles) {
    String title = "Could not " + StringUtil.capitalize(operationName);
    String description = UntrackedFilesNotifier.createUntrackedFilesOverwrittenDescription(operationName, false);

    final SelectFilesDialog dialog = new UntrackedFilesDialog(myProject, untrackedFiles, StringUtil.stripHtml(description, true), rollbackProposal);
    dialog.setTitle(title);
    UIUtil.invokeAndWaitIfNeeded(new Runnable() {
      @Override
      public void run() {
        myFacade.showDialog(dialog);
      }
    });
    return dialog.isOK();
  }

  @NotNull
  @Override
  public ProgressIndicator getProgressIndicator() {
    return myProgressIndicator;
  }

  @Override
  public int showSmartOperationDialog(@NotNull Project project, @NotNull List<Change> changes, @NotNull String operation, boolean force) {
    return GitSmartOperationDialog.showAndGetAnswer(myProject, changes, operation, true);
  }

  @Override
  public boolean showBranchIsNotFullyMergedDialog(@NotNull Project project, @NotNull final Map<GitRepository, List<GitCommit>> history,
                                                  @NotNull final String unmergedBranch, @NotNull final List<String> mergedToBranches,
                                                  @NotNull final String baseBranch) {
    final AtomicBoolean forceDelete = new AtomicBoolean();
    UIUtil.invokeAndWaitIfNeeded(new Runnable() {
      @Override
      public void run() {
        forceDelete.set(GitBranchIsNotFullyMergedDialog.showAndGetAnswer(myProject, history, unmergedBranch, mergedToBranches, baseBranch));
      }
    });
    return forceDelete.get();
  }

  @NotNull
  private static String unmergedFilesErrorTitle(@NotNull String operationName) {
    return "Can't " + operationName + " because of unmerged files";
  }

  @NotNull
  private static String unmergedFilesErrorNotificationDescription(String operationName) {
    return "You have to <a href='resolve'>resolve</a> all merge conflicts before " + operationName + ".<br/>" +
           "After resolving conflicts you also probably would want to commit your files to the current branch.";
  }

  private static class UntrackedFilesDialog extends SelectFilesDialog {

    @NotNull private final String myRollbackProposal;

    public UntrackedFilesDialog(@NotNull Project project, @NotNull Collection<VirtualFile> originalFiles, @NotNull String prompt,
                                @NotNull String rollbackProposal) {
      super(project, new ArrayList<VirtualFile>(originalFiles), prompt, null, false, false, false);
      myRollbackProposal = rollbackProposal;
      setOKButtonText("Rollback");
      setCancelButtonText("Don't rollback");
      init();
    }

    @Override
    protected JComponent createSouthPanel() {
      JComponent buttons = super.createSouthPanel();
      JPanel panel = new JPanel(new VerticalFlowLayout());
      panel.add(new JBLabel(XmlStringUtil.wrapInHtml(myRollbackProposal)));
      panel.add(buttons);
      return panel;
    }
  }
}