/*******************************************************************************
 * Copyright (c) 2003, 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.pde.internal.ui.editor.plugin;

import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.pde.core.IBaseModel;
import org.eclipse.pde.internal.core.text.AbstractEditingModel;
import org.eclipse.pde.internal.core.text.IDocumentNode;
import org.eclipse.pde.internal.core.text.plugin.FragmentModel;
import org.eclipse.pde.internal.core.text.plugin.PluginBaseNode;
import org.eclipse.pde.internal.core.text.plugin.PluginModel;
import org.eclipse.pde.internal.core.text.plugin.PluginModelBase;
import org.eclipse.pde.internal.ui.editor.JarEntryEditorInput;
import org.eclipse.pde.internal.ui.editor.PDEFormEditor;
import org.eclipse.pde.internal.ui.editor.SystemFileEditorInput;
import org.eclipse.pde.internal.ui.editor.context.XMLInputContext;
import org.eclipse.text.edits.InsertEdit;
import org.eclipse.text.edits.TextEdit;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IStorageEditorInput;

public class PluginInputContext extends XMLInputContext {
	public static final String CONTEXT_ID = "plugin-context"; //$NON-NLS-1$
	private boolean fIsFragment;

	public PluginInputContext(PDEFormEditor editor, IEditorInput input, boolean primary, boolean isFragment) {
		super(editor, input, primary);
		fIsFragment = isFragment;
		create();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.pde.internal.ui.editor.InputContext#createModel(org.eclipse.ui.IEditorInput)
	 */
	protected IBaseModel createModel(IEditorInput input) throws CoreException {
		PluginModelBase model = null;
		if (input instanceof IStorageEditorInput) {
			boolean isReconciling = input instanceof IFileEditorInput;
			IDocument document = getDocumentProvider().getDocument(input);
			if (fIsFragment) {
				model = new FragmentModel(document, isReconciling);
			} else {
				model = new PluginModel(document, isReconciling);
			}
			if (input instanceof IFileEditorInput) {
				IFile file = ((IFileEditorInput)input).getFile();
				model.setUnderlyingResource(file);
				model.setCharset(file.getCharset());
			} else if (input instanceof SystemFileEditorInput){
				File file = (File)((SystemFileEditorInput)input).getAdapter(File.class);
				model.setInstallLocation(file.getParent());
				model.setCharset(getDefaultCharset());
			} else if (input instanceof JarEntryEditorInput){
				File file = (File)((JarEntryEditorInput)input).getAdapter(File.class);
				model.setInstallLocation(file.toString());
				model.setCharset(getDefaultCharset());
			} else {
				model.setCharset(getDefaultCharset());				
			}
			model.load();
		}
		return model;
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.pde.internal.ui.editor.InputContext#getId()
	 */
	public String getId() {
		return CONTEXT_ID;
	}
	public boolean isFragment() {
		return fIsFragment;
	}
	
	protected void reorderInsertEdits(ArrayList ops) {
		HashMap map = getOperationTable();
		Iterator iter = map.keySet().iterator();
		TextEdit runtimeInsert = null;
		TextEdit requiresInsert = null;
		ArrayList extensionPointInserts = new ArrayList();
		ArrayList extensionInserts = new ArrayList();
		
		while (iter.hasNext()) {
			Object object = iter.next();
			if (object instanceof IDocumentNode) {
				IDocumentNode node = (IDocumentNode)object;
				if (node.getParentNode() instanceof PluginBaseNode) {
					TextEdit edit = (TextEdit)map.get(node);
					if (edit instanceof InsertEdit) {
						if (node.getXMLTagName().equals("runtime")) { //$NON-NLS-1$
							runtimeInsert = edit;
						} else if (node.getXMLTagName().equals("requires")) { //$NON-NLS-1$
							requiresInsert = edit;
						} else if (node.getXMLTagName().equals("extension")) { //$NON-NLS-1$
							extensionInserts.add(edit);
						} else if (node.getXMLTagName().equals("extension-point")) { //$NON-NLS-1$
							extensionPointInserts.add(edit);
						}
					}
				}
			}
		}
		
		for (int i = 0; i < ops.size(); i++) {
			TextEdit edit = (TextEdit)ops.get(i);
			if (edit instanceof InsertEdit) {
				if (extensionPointInserts.contains(edit)) {
					ops.remove(edit);
					ops.add(0, edit);
				}
			}
		}
		
		if (requiresInsert != null) {
			ops.remove(requiresInsert);
			ops.add(0, requiresInsert);
		}
		
		if (runtimeInsert != null) {
			ops.remove(runtimeInsert);
			ops.add(0, runtimeInsert);
		}		
	}
	
	public void doRevert() {
		fEditOperations.clear();
		fOperationTable.clear();
		fMoveOperations.clear();
		AbstractEditingModel model = (AbstractEditingModel)getModel();
		model.reconciled(model.getDocument());
	}
	
	protected String getPartitionName() {
		return "___plugin_partition"; //$NON-NLS-1$
	}
}
