/*
 * Copyright (c) 2007-2009, Osmorc Development Team
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright notice, this list
 *       of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright notice, this
 *       list of conditions and the following disclaimer in the documentation and/or other
 *       materials provided with the distribution.
 *     * Neither the name of 'Osmorc Development Team' nor the names of its contributors may be
 *       used to endorse or promote products derived from this software without specific
 *       prior written permission.
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.osmorc;

import com.intellij.openapi.application.Application;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.components.ProjectComponent;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.module.ModuleUtil;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiManager;
import com.intellij.psi.PsiTreeChangeAdapter;
import com.intellij.psi.PsiTreeChangeEvent;
import org.jetbrains.annotations.NotNull;
import org.osmorc.frameworkintegration.FrameworkInstanceModuleManager;
import org.osmorc.manifest.lang.psi.ManifestFile;
import org.osmorc.settings.ProjectSettings;

/**
 * @author Robert F. Beeger (robert@beeger.net)
 */
public class OsmorcProjectComponent implements ProjectComponent, ProjectSettings.ProjectSettingsListener {
  private final BundleManager bundleManager;
  private final ProjectSettings projectSettings;
  private final Project project;
  private final Application application;
  private final FrameworkInstanceModuleManager frameworkInstanceModuleManager;

  public OsmorcProjectComponent(BundleManager bundleManager,
                                ProjectSettings projectSettings,
                                Project project,
                                Application application,
                                FrameworkInstanceModuleManager frameworkInstanceModuleManager) {
    this.bundleManager = bundleManager;
    this.projectSettings = projectSettings;
    this.project = project;
    this.application = application;
    this.frameworkInstanceModuleManager = frameworkInstanceModuleManager;
  }

  @NotNull
  public String getComponentName() {
    return "OsmorcProjectComponent";
  }

  public void initComponent() {
    PsiManager.getInstance(project).addPsiTreeChangeListener(new PsiTreeChangeAdapter() {
      public void childrenChanged(PsiTreeChangeEvent event) {
        processChange(event);
      }

      public void childAdded(PsiTreeChangeEvent event) {
        processChange(event);
      }

      public void childRemoved(PsiTreeChangeEvent event) {
        processChange(event);
      }

      public void childReplaced(PsiTreeChangeEvent event) {
        processChange(event);
      }
    });
    projectSettings.addProjectSettingsListener(this);
  }

  public void disposeComponent() {
    projectSettings.removeProjectSettingsListener(this);
  }

  public void projectOpened() {
    frameworkInstanceModuleManager.updateFrameworkInstanceModule();
  }

  public void projectClosed() {

  }


  private void processChange(final PsiTreeChangeEvent event) {
    final PsiFile file = event.getFile();
    if (!(file instanceof ManifestFile)) return;

    Runnable onChangeRunnable = new Runnable() {
      public void run() {
        // TODO: this should be better handled lazily

        Module moduleOfChangedManifest = ModuleUtil.findModuleForPsiElement(file);
        if (moduleOfChangedManifest != null) {
          bundleManager.addOrUpdateBundle(moduleOfChangedManifest);
        }
      }
    };

    if (ApplicationManager.getApplication().isCommandLine()) {
      onChangeRunnable.run();
    }
    else {
      application.invokeLater(onChangeRunnable);
    }
  }

  private void runFrameworkInstanceUpdate(final boolean onlyIfFrameworkInstanceSelectionChanged) {
    if (bundleManager.reloadFrameworkInstanceLibraries(onlyIfFrameworkInstanceSelectionChanged)) {
      frameworkInstanceModuleManager.updateFrameworkInstanceModule();
    }
  }

  public void projectSettingsChanged() {
  runFrameworkInstanceUpdate(true);
  }
}