/**********************************************************************
Copyright (c) 2000, 2002 IBM Corp. and others.
All rights reserved. This program and the accompanying materials
are made available under the terms of the Common Public License v1.0
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/cpl-v10.html

Contributors:
    IBM Corporation - Initial implementation
    Klaus Hartlage - www.eclipseproject.de
**********************************************************************/
package net.sourceforge.phpeclipse.actions;

import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.StringTokenizer;

import net.sourceforge.phpeclipse.PHPeclipsePlugin;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.texteditor.MarkerUtilities;

public class PHPExternalParserAction implements IObjectActionDelegate {
  private static final String PARSE_ERROR = "Parse error"; //$NON-NLS-1$
  private static final String WARNING = "Warning"; //$NON-NLS-1$

  private IWorkbenchPart workbenchPart;
  /**
   * Constructor for Action1.
   */
  public PHPExternalParserAction() {
    super();
  }

  /**
   * @see IObjectActionDelegate#setActivePart(IAction, IWorkbenchPart)
   */
  public void setActivePart(IAction action, IWorkbenchPart targetPart) {
    workbenchPart = targetPart;
  }

  //  public static void open(final URL url, final Shell shell, final String dialogTitle) {
  //    IHelp help= WorkbenchHelp.getHelpSupport();
  //    if (help != null) {
  //      WorkbenchHelp.getHelpSupport().displayHelpResource(url.toExternalForm());
  //    } else {
  //      showMessage(shell, dialogTitle, ActionMessages.getString("OpenBrowserUtil.help_not_available"), false); //$NON-NLS-1$
  //    }
  //  }

  public void run(IAction action) {
    ISelectionProvider selectionProvider = null;
    selectionProvider = workbenchPart.getSite().getSelectionProvider();

    StructuredSelection selection = null;
    selection = (StructuredSelection) selectionProvider.getSelection();

    IPreferenceStore store = PHPeclipsePlugin.getDefault().getPreferenceStore();

    Shell shell = null;
    Iterator iterator = null;
    iterator = selection.iterator();
    while (iterator.hasNext()) {
      //  obj => selected object in the view
      Object obj = iterator.next();

      // is it a resource
      if (obj instanceof IResource) {
        IResource resource = (IResource) obj;

        // check if it's a file resource
        switch (resource.getType()) {

          case IResource.FILE :
            // single file:
            IFile file = (IFile) resource;
            IPath path = file.getFullPath();

            String filename = file.getLocation().toString();

            String[] arguments = { filename };
            MessageFormat form = new MessageFormat(store.getString(PHPeclipsePlugin.EXTERNAL_PARSER_PREF));
            String command = form.format(arguments);

            String parserResult = PHPStartApacheAction.execute(command, "External parser: ");

            try {
              // parse the buffer to find the errors and warnings
              createMarkers(parserResult, file);
            } catch (CoreException e) {
            }

        }
      }
    }
  }

  /**
   * @see IActionDelegate#selectionChanged(IAction, ISelection)
   */
  public void selectionChanged(IAction action, ISelection selection) {
  }

  /**
   * Create markers according to the compiler output
   */
  protected void createMarkers(String output, IFile file) throws CoreException {
    // delete all markers
    file.deleteMarkers(IMarker.PROBLEM, false, 0);

    int indx = 0;
    int brIndx = 0;
    boolean flag = true;
    while ((brIndx = output.indexOf("<br />", indx)) != -1) {
      // newer php error output (tested with 4.2.3)
      scanLine(output, file, indx, brIndx);
      indx = brIndx + 6;
      flag = false;
    }
    if (flag) {
      while ((brIndx = output.indexOf("<br>", indx)) != -1) {
        // older php error output (tested with 4.2.3)
        scanLine(output, file, indx, brIndx);
        indx = brIndx + 4;
      }
    }
  }
  private void scanLine(String output, IFile file, int indx, int brIndx) throws CoreException {
    String current;
    String outLineNumberString;
    StringBuffer lineNumberBuffer = new StringBuffer(10);
    char ch;
    current = output.substring(indx, brIndx);

    if (current.indexOf(WARNING) != -1 || current.indexOf(PARSE_ERROR) != -1) {
      int onLine = current.indexOf("on line <b>");
      if (onLine != -1) {
        lineNumberBuffer.delete(0, lineNumberBuffer.length());
        for (int i = onLine; i < current.length(); i++) {
          ch = current.charAt(i);
          if ('0' <= ch && '9' >= ch) {
            lineNumberBuffer.append(ch);
          }
        }

        //          String line = current.substring(current.indexOf(fullPath) + fullPath.length(), current.length());
        //          String errorsLocation = line.substring(1, line.indexOf(":") - 1); //$NON-NLS-1$
        //          String message = line.substring(line.indexOf(":") + 2, line.length() - 1); //$NON-NLS-1$

        int lineNumber = Integer.parseInt(lineNumberBuffer.toString());

        Hashtable attributes = new Hashtable();

        current = current.replaceAll("\n", "");
        current = current.replaceAll("<b>", "");
        current = current.replaceAll("</b>", "");
        MarkerUtilities.setMessage(attributes, current);

        if (current.indexOf(PARSE_ERROR) != -1)
          attributes.put(IMarker.SEVERITY, new Integer(IMarker.SEVERITY_ERROR));
        else if (current.indexOf(WARNING) != -1)
          attributes.put(IMarker.SEVERITY, new Integer(IMarker.SEVERITY_WARNING));
        else
          attributes.put(IMarker.SEVERITY, new Integer(IMarker.SEVERITY_INFO));
        MarkerUtilities.setLineNumber(attributes, lineNumber);
        MarkerUtilities.createMarker(file, attributes, IMarker.PROBLEM);
      }
    }
  }
}