package org.xicabin.radcake.core.handlers;

import java.io.ByteArrayInputStream;
import java.io.InputStream;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.ide.IDE;
import org.xicabin.radcake.core.CakePlugin;
import org.xicabin.radcake.core.preferences.PreferenceConstants;
import org.xicabin.radcake.core.util.CakeConvention;

/**
 * Action for user event
 * 
 * @author Darcy Young
 */
public abstract class Action {
	public static void open(IWorkbenchPage page, IFile file) {
		open(page, file, "");
	}

	public static void open(IWorkbenchPage page, IFile file, String text) {
		IFile destFile = null;
		// M -> C -> V
		if (CakeConvention.looksLikeModel(file)) {
			destFile = CakeConvention.getControllerFromModel(file);
		} else if (CakeConvention.looksLikeView(file)) {
			destFile = CakeConvention.getModelFromView(file);
		} else if (CakeConvention.looksLikeController(file)) {
			if (text == null || text.length() == 0) {
				destFile = CakeConvention.getModelFromController(file);
			} else {
				destFile = CakeConvention.getViewFromAction(file, text);
			}
		}
		try {
			if (destFile != null && destFile.exists()) {
				IDE.openEditor(page, destFile);
			}
		} catch (CoreException e) {
			String clazz = destFile.getName();
			System.err.println("OpenCakeFile can not open file: " + clazz);
			e.printStackTrace();
		}
	}

	public static void openModel(IWorkbenchPage page, IFile file) {
		if (CakeConvention.looksLikeModel(file))
			return;
		IFile destFile = null;
		if (CakeConvention.looksLikeController(file)) {
			destFile = CakeConvention.getModelFromController(file);
		} else if (CakeConvention.looksLikeView(file)) {
			destFile = CakeConvention.getModelFromView(file);
		}
		try {
			if (destFile != null && destFile.exists()) {
				IDE.openEditor(page, destFile);
			}
		} catch (CoreException e) {
			String clazz = destFile.getName();
			System.err.println("OpenModelFile can not open file: " + clazz);
			e.printStackTrace();
		}
	}

	public static void openController(IWorkbenchPage page, IFile file) {
		if (CakeConvention.looksLikeController(file))
			return;
		IFile destFile = null;
		if (CakeConvention.looksLikeModel(file)) {
			destFile = CakeConvention.getControllerFromModel(file);
		} else if (CakeConvention.looksLikeView(file)) {
			destFile = CakeConvention.getControllerFromView(file);
		}
		try {
			if (destFile != null && destFile.exists()) {
				IDE.openEditor(page, destFile);
			}
		} catch (CoreException e) {
			String clazz = destFile.getName();
			System.err
					.println("OpenControllerFile can not open file: " + clazz);
			e.printStackTrace();
		}
	}

	public static void openView(IWorkbenchPage page, IFile file, String text) {
		if (CakeConvention.looksLikeView(file))
			return;
		IFile destFile = null;
		if (CakeConvention.looksLikeController(file)) {
			destFile = CakeConvention.getViewFromAction(file, text);
			if (destFile != null && !destFile.exists() && text != null
					&& text.length() != 0) {
				boolean prompt = CakePlugin.getInstance().getPreferenceStore()
						.getBoolean(
								PreferenceConstants.CREATE_MISSING_VIEW_PROMPT);
				if (prompt) {
					boolean createMissingView = MessageDialog.openConfirm(page
							.getWorkbenchWindow().getShell(),
							"Create missing view", "View " + destFile.getName()
									+ " can not be found, create it ?");
					if (createMissingView) {
						try {
							InputStream stream = new ByteArrayInputStream(
									new byte[0]);
							destFile.create(stream, true, null);
						} catch (Exception e) {
							System.err
									.println("OpenViewFile can not create file: "
											+ destFile.getName());
							e.printStackTrace();
						}
					}
				}
			}
		}
		try {
			if (destFile != null && destFile.exists()) {
				IDE.openEditor(page, destFile);
			}
		} catch (CoreException e) {
			String clazz = destFile.getName();
			System.err.println("OpenViewFile can not open file: " + clazz);
			e.printStackTrace();
		}
	}
}