package net.sourceforge.phpeclipse.wiki.actions.httpquery;

import java.io.StringWriter;
import java.net.URL;

import net.sourceforge.phpeclipse.webbrowser.views.BrowserView;
import net.sourceforge.phpeclipse.wiki.internal.Configuration;
import net.sourceforge.phpeclipse.wiki.internal.ConfigurationWorkingCopy;
import net.sourceforge.phpeclipse.wiki.velocity.EditorText;

import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IEditorActionDelegate;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;

public abstract class AbstractHTTPQueryAction implements IEditorActionDelegate {

  private IEditorPart targetEditor;
  private EditorText text;
  public AbstractHTTPQueryAction() {
    super();
  }

  public void setActiveEditor(IAction action, IEditorPart targetEditor) {
    this.targetEditor = targetEditor;
    text = new EditorText(targetEditor);
  }

  abstract protected Configuration getConfiguration();

  public void run(IAction action) {
    URL url;
    IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
    if (window != null) {
      IWorkbenchPage page = window.getActivePage();
      try {
        IViewPart part = page.findView(BrowserView.ID_BROWSER);
        if (part == null) {
          part = page.showView(BrowserView.ID_BROWSER);
        } else {
          page.bringToTop(part);
        }
        Configuration config = getConfiguration();
        String templateString = generateUrl(config, config.getURL());
        if (templateString != null && !templateString.equals("")) {
          ((BrowserView) part).setUrl(templateString);
        }
      } catch (Exception e) {
      }
    }
  }

  public void selectionChanged(IAction action, ISelection selection) {
  }

  public String generateUrl(Configuration config, String template) {

    /* first, we init the runtime engine. Defaults are fine. */

    try {
      Velocity.init();

      /* lets make a Context and put data into it */

      VelocityContext context = new VelocityContext();
      
      context.put("config", config);
      text.clear();
      context.put("text", text);  

      /* lets make our own string to render */
      StringWriter w = new StringWriter();
      w = new StringWriter();
      Velocity.evaluate(context, w, "mystring", template);
      return w.toString();

    } catch (Exception e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    return template;
  }
}