package net.sourceforge.phpeclipse.phpeditor;

/**********************************************************************
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
**********************************************************************/

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import net.sourceforge.phpdt.internal.compiler.parser.Parser;
import net.sourceforge.phpeclipse.PHPeclipsePlugin;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.ui.texteditor.TextEditorAction;

/**
 * Class that defines the action for parsing the current PHP file
 */
public class PHPParserAction extends TextEditorAction {

  private static PHPParserAction instance = new PHPParserAction();
  private static String[] EXTENSIONS = { ".php", ".php3", ".php4", ".inc", ".phtml" };

  protected IFile fileToParse;
  protected List fVariables = new ArrayList(100);

  /**
   * Constructs and updates the action.
   */
  private PHPParserAction() {
    super(PHPEditorMessages.getResourceBundle(), "ParserAction.", null); //$NON-NLS-1$
    update();
  }

  public static PHPParserAction getInstance() {
    return instance;
  }

  /**
   * Code called when the action is fired.
   */
  public void run() {
    boolean phpFlag = false;
    try {
      fileToParse = getPHPFile();
      if (fileToParse == null) {
        // should never happen
        System.err.println("Error : no file in the editor");
        // should throw an exception
        return;
      }
      String name = fileToParse.getName();
      for (int i = 0; i<EXTENSIONS.length; i++) {
        if (name.endsWith(EXTENSIONS[i])) {
          phpFlag = true;  // php file extension
          break;
        }
      }
      if (phpFlag) {
        IPreferenceStore store = PHPeclipsePlugin.getDefault().getPreferenceStore();
        if (store.getString(PHPeclipsePlugin.PHP_PARSER_DEFAULT).equals(PHPeclipsePlugin.PHP_INTERNAL_PARSER)) {
          // first delete all the previous markers
          fileToParse.deleteMarkers(IMarker.PROBLEM, false, 0);

          try {
            InputStream iStream = fileToParse.getContents();
            //        int c = iStream.read();
            parse(iStream);
            iStream.close();
          } catch (IOException e) {
          }
        } else {
          Parser.phpExternalParse(fileToParse);
        }
      }
    } catch (CoreException e) {
    }

  }

  /**
   * Finds the file that's currently opened in the PHP Text Editor
   */
  protected IFile getPHPFile() {
    ITextEditor editor = getTextEditor();

    IEditorInput editorInput = null;
    if (editor != null) {
      editorInput = editor.getEditorInput();
    }

    if (editorInput instanceof IFileEditorInput)
      return ((IFileEditorInput) editorInput).getFile();

    // if nothing was found, which should never happen
    return null;
  }

  /**
   * Create marker for the parse error
   */
  //  protected void setMarker(String message, int lineNumber) throws CoreException {
  //
  //    Hashtable attributes = new Hashtable();
  //    MarkerUtilities.setMessage(attributes, message);
  //    if (message.startsWith(ERROR))
  //      attributes.put(IMarker.SEVERITY, new Integer(IMarker.SEVERITY_ERROR));
  //    else if (message.startsWith(WARNING))
  //      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(fileToParse, attributes, IMarker.PROBLEM);
  //  }

  //  private String getIdentifier(InputStream iStream, int c) {
  //    //    int i = 0;
  //    // char c;
  //    //  int textLength = text.length();
  //    StringBuffer identifier = new StringBuffer();
  //    identifier.append((char) c);
  //    try {
  //      while ((c = iStream.read()) != (-1)) {
  //        if (Character.isJavaIdentifierPart((char) c)) {
  //          identifier.append((char) c);
  //          //        } else if ((i == 0) && (c == '$')) {
  //          //          identifier.append((char)c);
  //        } else {
  //          return identifier.toString();
  //        }
  //        //        i++;
  //      }
  //    } catch (IOException e) {
  //    }
  //    return identifier.toString();
  //  }

  protected void parse(InputStream iStream) {

    StringBuffer buf = new StringBuffer();
    int c0;
    try {
      while ((c0 = iStream.read()) != (-1)) {
        buf.append((char) c0);
      }
    } catch (IOException e) {
      return;
    }
    String input = buf.toString();

    Parser parser = new Parser(fileToParse);
    try {
      parser.parse(input);
    } catch (CoreException e) {
    }
  }
}