/*******************************************************************************
 * 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: Klaus Hartlage - www.eclipseproject.de
 ******************************************************************************/
package net.sourceforge.phpeclipse.actions;

import net.sourceforge.phpdt.internal.compiler.parser.Scanner;
import net.sourceforge.phpeclipse.phpeditor.PHPEditor;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.text.TextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.swt.graphics.Point;
import org.eclipse.ui.IEditorActionDelegate;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.actions.ActionDelegate;
import org.eclipse.ui.ide.IDE;

public class PHPOpenIncludeEditorAction extends ActionDelegate
		implements
			IEditorActionDelegate {

	private IWorkbenchWindow fWindow;
	private PHPEditor fEditor;
	private IProject fProject;

	public void dispose() {
	}

	public void init(IWorkbenchWindow window) {
		this.fWindow = window;
	}

	public void selectionChanged(IAction action, ISelection selection) {
		if (!selection.isEmpty()) {
			if (selection instanceof TextSelection) {
				action.setEnabled(true);
			} else if (fWindow.getActivePage() != null
					&& fWindow.getActivePage().getActivePart() != null) {
				//
			}
		}
	}
	private IWorkbenchPage getActivePage() {
		IWorkbenchWindow workbenchWindow = fEditor.getEditorSite()
				.getWorkbenchWindow();
		IWorkbenchPage page = workbenchWindow.getActivePage();
		return page;
	}
	public IContainer getWorkingLocation(IFileEditorInput editorInput) {
		if (editorInput == null || editorInput.getFile() == null) {
			return null;
		}
		return editorInput.getFile().getParent();
	}
	private IFile getWikiFile(IProject project, IFileEditorInput editorInput, String relativeFilename) {
//		IContainer container = getWorkingLocation(editorInput);
//		String fullPath  = project.getLocation().toString();
		Path path = new Path(relativeFilename);
		IFile file = project.getFile(path);
		return file;
	}

	public void run(IAction action) {
		if (fEditor == null) {
			IEditorPart targetEditor = fWindow.getActivePage()
					.getActiveEditor();
			if (targetEditor != null && (targetEditor instanceof PHPEditor)) {
				fEditor = (PHPEditor) targetEditor;
			}
		}
		if (fEditor != null) {
			// determine the current Project from a (file-based) Editor
			IFile f = ((IFileEditorInput) fEditor.getEditorInput()).getFile();
			fProject = f.getProject();
			//      System.out.println(fProject.toString());

			ITextSelection selection = (ITextSelection) fEditor
					.getSelectionProvider().getSelection();
			IDocument doc = fEditor.getDocumentProvider().getDocument(
					fEditor.getEditorInput());
			int pos = selection.getOffset();
			//  System.out.println(selection.getText());
			String relativeFilename = getPHPIncludeText(doc, pos);
			//      System.out.println(word);
			if (relativeFilename != null && !relativeFilename.equals("")) {

				IFile file = getWikiFile(fProject, (IFileEditorInput) fEditor
						.getEditorInput(), relativeFilename);
				try {
					//			createNewFileIfNeeded(file);
					//			if
					// (WikiPlugin.getDefault().getPreferenceStore().getBoolean(WikiConstants.REUSE_EDITOR))
					// {
					//				saveIfNeeded();
					//				getActivePage().reuseEditor(reusableEditor, new
					// FileEditorInput(file));
					//			} else {
					IDE.openEditor(getActivePage(), file, true);
					//				redrawText();
					//			}
				} catch (Exception e) {
					//			WikiPlugin.getDefault().logAndReport(WikiPlugin.getResourceString(WikiConstants.RESOURCE_WIKI_ERROR_DIALOGUE_OPEN_WIKI_FILE_TITLE),
					// WikiPlugin.getResourceString(WikiConstants.RESOURCE_WIKI_ERROR_DIALOGUE_OPEN_WIKI_FILE_TEXT),
					// e);
				}

			}
		}
	}

	public void setActiveEditor(IAction action, IEditorPart targetEditor) {
		if (targetEditor != null && (targetEditor instanceof PHPEditor)) {
			fEditor = (PHPEditor) targetEditor;
		}
	}

	private String getPHPIncludeText(IDocument doc, int pos) {
		Point word = null;
		int start = -1;
		int end = -1;

		try {

			int position = pos;
			char character;

			while (position >= 0) {
				character = doc.getChar(position);
				if ((character=='\"')||(character == '\'')|| (character == '\r')|| (character == '\n'))
					break;
				--position;
			}

			start = position;

			position = pos;
			int length = doc.getLength();

			while (position < length) {
				character = doc.getChar(position);
				if ((character=='\"')||(character == '\'')|| (character == '\r')|| (character == '\n'))
					break;
				++position;
			}

			start++;
			end = position;

			if (end > start)
				word = new Point(start, end - start);

		} catch (BadLocationException x) {
		}

		if (word != null) {
			try {
				return doc.get(word.x, word.y);
			} catch (BadLocationException e) {
			}
		}
		return "";
	}
}