/*
 * 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.openapi.updateSettings.impl.pluginsAdvertisement;

import com.intellij.ide.plugins.IdeaPluginDescriptor;
import com.intellij.ide.plugins.RepositoryHelper;
import com.intellij.ide.util.PropertiesComponent;
import com.intellij.openapi.fileEditor.FileEditor;
import com.intellij.openapi.fileTypes.FileTypeFactory;
import com.intellij.openapi.fileTypes.PlainTextFileType;
import com.intellij.openapi.progress.ProgressIndicator;
import com.intellij.openapi.progress.ProgressManager;
import com.intellij.openapi.progress.Task;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.updateSettings.impl.PluginDownloader;
import com.intellij.openapi.util.Key;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.ui.EditorNotificationPanel;
import com.intellij.ui.EditorNotifications;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

/**
 * User: anna
 * Date: 10/11/13
 */
public class PluginAdvertiserEditorNotificationProvider extends EditorNotifications.Provider<EditorNotificationPanel> {
  private static final Key<EditorNotificationPanel> KEY = Key.create("file.type.associations.detected");
  private final Project myProject;
  private final EditorNotifications myNotifications;
  private final Set<String> myEnabledExtensions = new HashSet<String>();

  public PluginAdvertiserEditorNotificationProvider(Project project, final EditorNotifications notifications) {
    myProject = project;
    myNotifications = notifications;
  }

  @NotNull
  @Override
  public Key<EditorNotificationPanel> getKey() {
    return KEY;
  }

  @Nullable
  @Override
  public EditorNotificationPanel createNotificationPanel(@NotNull VirtualFile file, @NotNull FileEditor fileEditor) {
    if (file.getFileType() != PlainTextFileType.INSTANCE) return null;

    final String extension = file.getExtension();
    final String fileName = file.getName();
    if (extension != null && isIgnored("*." + extension) || isIgnored(fileName)) return null;

    final PluginsAdvertiser.KnownExtensions knownExtensions = PluginsAdvertiser.loadExtensions();
    if (knownExtensions != null) {
      final EditorNotificationPanel panel = extension != null ? createPanel("*." + extension, knownExtensions) : null;
      if (panel != null) {
        return panel;
      }
      return createPanel(fileName, knownExtensions);
    }
    return null;
  }

  private boolean isIgnored(String extension) {
    return myEnabledExtensions.contains(extension) ||
           UnknownFeaturesCollector.getInstance(myProject).isIgnored(createExtensionFeature(extension));
  }

  private EditorNotificationPanel createPanel(String extension, PluginsAdvertiser.KnownExtensions knownExtensions) {
    final Set<PluginsAdvertiser.Plugin> plugins = knownExtensions.find(extension);
    if (plugins != null && !plugins.isEmpty()) {
      return createPanel(extension, plugins);
    }
    return null;
  }

  @Nullable
  private EditorNotificationPanel createPanel(final String extension, final Set<PluginsAdvertiser.Plugin> plugins) {
    final EditorNotificationPanel panel = new EditorNotificationPanel();
    
    panel.setText("Plugins supporting " + extension + " files are found");
    final IdeaPluginDescriptor disabledPlugin = PluginsAdvertiser.getDisabledPlugin(plugins);
    if (disabledPlugin != null) {
      panel.createActionLabel("Enable " + disabledPlugin.getName() + " plugin", new Runnable() {
        @Override
        public void run() {
          myEnabledExtensions.add(extension);
          myNotifications.updateAllNotifications();
          PluginsAdvertiser.enablePlugins(myProject, Collections.singletonList(disabledPlugin));
        }
      });
    } else if (hasNonBundledPlugin(plugins)) {
      panel.createActionLabel("Install plugins", new Runnable() {
        @Override
        public void run() {
          ProgressManager.getInstance().run(new Task.Modal(null, "Search for plugins in repository", true) {
            private final Set<PluginDownloader> myPlugins = new HashSet<PluginDownloader>();
            private List<IdeaPluginDescriptor> myAllPlugins;

            @Override
            public void run(@NotNull ProgressIndicator indicator) {
              try {
                myAllPlugins = RepositoryHelper.loadPluginsFromRepository(indicator);
                for (IdeaPluginDescriptor loadedPlugin : myAllPlugins) {
                  if (plugins.contains(new PluginsAdvertiser.Plugin(loadedPlugin.getPluginId(), null, false))) {
                    myPlugins.add(PluginDownloader.createDownloader(loadedPlugin));
                  }
                }
              }
              catch (Exception ignore) {
              }
            }

            @Override
            public void onSuccess() {
              final PluginsAdvertiserDialog advertiserDialog = new PluginsAdvertiserDialog(null, myPlugins.toArray(new PluginDownloader[myPlugins.size()]), myAllPlugins);
              advertiserDialog.show();
              if (advertiserDialog.isOK()) {
                myEnabledExtensions.add(extension);
                myNotifications.updateAllNotifications();
              }
            }
          });
        }
      });
    } else if (PluginsAdvertiser.hasBundledPluginToInstall(plugins) != null){
      if (PropertiesComponent.getInstance().isTrueValue(PluginsAdvertiser.IGNORE_ULTIMATE_EDITION)) {
        return null;
      }
      panel.setText(extension + " files are supported by " + PluginsAdvertiser.IDEA_ULTIMATE_EDITION);

      panel.createActionLabel(PluginsAdvertiser.CHECK_ULTIMATE_EDITION_TITLE, new Runnable() {
        @Override
        public void run() {
          myEnabledExtensions.add(extension);
          PluginsAdvertiser.openDownloadPage();
        }
      });

      panel.createActionLabel(PluginsAdvertiser.ULTIMATE_EDITION_SUGGESTION, new Runnable() {
        @Override
        public void run() {
          PropertiesComponent.getInstance().setValue(PluginsAdvertiser.IGNORE_ULTIMATE_EDITION, "true");
          myNotifications.updateAllNotifications();
        }
      });
    } else {
      return null;
    }
    panel.createActionLabel("Ignore extension", new Runnable() {
      @Override
      public void run() {
        UnknownFeaturesCollector.getInstance(myProject).ignoreFeature(createExtensionFeature(extension));
        myNotifications.updateAllNotifications();
      }
    });
    return panel;
  }

  private static boolean hasNonBundledPlugin(Set<PluginsAdvertiser.Plugin> plugins) {
    for (PluginsAdvertiser.Plugin plugin : plugins) {
      if (!plugin.myBundled) return true;
    }
    return false;
  }

  private static UnknownFeature createExtensionFeature(String extension) {
    return new UnknownFeature(FileTypeFactory.FILE_TYPE_FACTORY_EP.getName(), extension);
  }
}