package sk.stuba.fiit.perconik.activity.listeners.ui;

import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchWindow;

import sk.stuba.fiit.perconik.activity.events.LocalEvent;
import sk.stuba.fiit.perconik.activity.listeners.ActivityListener;
import sk.stuba.fiit.perconik.activity.serializers.ui.WindowSerializer;
import sk.stuba.fiit.perconik.core.annotations.Version;
import sk.stuba.fiit.perconik.data.events.Event;

import static sk.stuba.fiit.perconik.activity.listeners.ui.WindowListener.Action.ACTIVATE;
import static sk.stuba.fiit.perconik.activity.listeners.ui.WindowListener.Action.CLOSE;
import static sk.stuba.fiit.perconik.activity.listeners.ui.WindowListener.Action.DEACTIVATE;
import static sk.stuba.fiit.perconik.activity.listeners.ui.WindowListener.Action.OPEN;
import static sk.stuba.fiit.perconik.activity.serializers.ConfigurableSerializer.StandardOption.TREE;
import static sk.stuba.fiit.perconik.activity.serializers.Serializations.identifyObject;
import static sk.stuba.fiit.perconik.activity.serializers.Serializers.asDisplayTask;
import static sk.stuba.fiit.perconik.data.content.StructuredContents.key;
import static sk.stuba.fiit.perconik.utilities.MoreStrings.toLowerCase;

/**
 * TODO
 *
 * @author Pavol Zbell
 * @since 1.0
 */
@Version("0.0.6.alpha")
public final class WindowListener extends ActivityListener implements sk.stuba.fiit.perconik.core.listeners.WindowListener {
  // TODO looks like open / close are never fired by eclipse on startup / shutdown

  public WindowListener() {}

  enum Action implements ActivityListener.Action {
    OPEN,

    CLOSE,

    ACTIVATE,

    DEACTIVATE;

    private final String name;

    private final String path;

    private Action() {
      this.name = actionName("eclipse", "window", this);
      this.path = actionPath(this.name);
    }

    public String getName() {
      return this.name;
    }

    public String getPath() {
      return this.path;
    }
  }

  Event build(final long time, final Action action, final IWorkbenchWindow window) {
    Event data = LocalEvent.of(time, action.getName());

    data.put(key("window"), this.execute(asDisplayTask(new WindowSerializer(TREE), window)));

    IWorkbench workbench = window.getWorkbench();

    data.put(key("window", "workbench"), identifyObject(workbench));

    return data;
  }

  void process(final long time, final Action action, final IWorkbenchWindow window) {
    this.send(action.getPath(), this.build(time, action, window));
  }

  void execute(final long time, final Action action, final IWorkbenchWindow window) {
    IWorkbench workbench = window.getWorkbench();

    if (workbench.isClosing() && (action == CLOSE || action == DEACTIVATE)) {
      if (this.log.isEnabled()) {
        this.log.print("%s: workbench is closing, %1$s %s event not processed", "window", toLowerCase(action));
      }

      return;
    }

    this.execute(new Runnable() {
      public void run() {
        process(time, action, window);
      }
    });
  }

  public void windowOpened(final IWorkbenchWindow window) {
    final long time = this.currentTime();

    this.execute(time, OPEN, window);
  }

  public void windowClosed(final IWorkbenchWindow window) {
    final long time = this.currentTime();

    this.execute(time, CLOSE, window);
  }

  public void windowActivated(final IWorkbenchWindow window) {
    final long time = this.currentTime();

    this.execute(time, ACTIVATE, window);
  }

  public void windowDeactivated(final IWorkbenchWindow window) {
    final long time = this.currentTime();

    this.execute(time, DEACTIVATE, window);
  }
}