/* 
 
Copyright 2006 Rene Grothmann, modified by Eric Hakenholz

This file is part of C.a.R. software.

    C.a.R. is a free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, version 3 of the License.

    C.a.R. is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
 
 package rene.dialogs;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.Vector;

import eric.JEricPanel;

import rene.gui.ButtonAction;
import rene.gui.CloseDialog;
import rene.gui.Global;
import rene.gui.MyLabel;
import rene.gui.MyList;
import rene.gui.MyPanel;
import rene.gui.Panel3D;

/**
 * This is a general class to one in a list of items (like makros, plugins or
 * tools in the JE editor).
 */

public class ItemEditor extends CloseDialog implements ItemListener {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	Frame F;
	/** An AWT list at the left */
	MyList L;
	/** Aborted? */
	boolean Aborted = true;
	/** A vector of ItemEditorElement objects */
	Vector V;
	/** A panel to display the element settings */
	ItemPanel P;
	/** The name of this editor */
	String Name;
	/** The displayed item */
	int Displayed = -1;
	/** possible actions */
	public final static int NONE = 0, SAVE = 1, LOAD = 2;
	/** save or load action */
	int Action = NONE;

	/**
	 * @param p
	 *            The item editor panel
	 * @param v
	 *            The vector of item editor elements
	 * @param prompt
	 *            The prompt, displayed in the north
	 */
	public ItemEditor(final Frame f, final ItemPanel p, final Vector v,
			final String name, final String prompt) {
		this(f, p, v, name, prompt, true, true, false, "");
	}

	public ItemEditor(final Frame f, final ItemPanel p, final Vector v,
			final String name, final String prompt, final boolean allowChanges,
			final boolean allowReorder, final boolean allowSave,
			final String extraButton) {
		super(f, Global.name(name + ".title"), true);
		Name = name;
		F = f;
		P = p;
		setLayout(new BorderLayout());

		// Title String:
		final JEricPanel title = new MyPanel();
		title.add(new MyLabel(prompt));
		add("North", title);

		// Center panel:
		final JEricPanel center = new MyPanel();
		center.setLayout(new BorderLayout(5, 5));

		// Element List:
		center.add("West", L = new MyList(10));
		L.addItemListener(this);

		// Editor JPanel:
		final JEricPanel cp = new MyPanel();
		cp.setLayout(new BorderLayout());
		cp.add("North", P);
		cp.add("Center", new MyPanel());
		center.add("Center", cp);

		add("Center", new Panel3D(center));

		// Buttons:
		final JEricPanel buttons = new MyPanel();
		buttons.setLayout(new GridLayout(0, 1));

		if (allowChanges) {
			final JEricPanel buttons1 = new MyPanel();
			buttons1.add(new ButtonAction(this, Global
					.name("itemeditor.insert"), "Insert"));
			buttons1.add(new ButtonAction(this, Global.name("itemeditor.new"),
			"New"));
			buttons1.add(new ButtonAction(this, Global
					.name("itemeditor.delete"), "Delete"));
			buttons.add(buttons1);
		}

		if (allowReorder) {
			final JEricPanel buttons2 = new MyPanel();
			buttons2.add(new ButtonAction(this, Global.name("itemeditor.down"),
			"Down"));
			buttons2.add(new ButtonAction(this, Global.name("itemeditor.up"),
			"Up"));
			buttons.add(buttons2);
		}

		final JEricPanel buttons3 = new MyPanel();
		buttons3.setLayout(new FlowLayout(FlowLayout.RIGHT));
		buttons3.add(new ButtonAction(this, Global.name("OK"), "OK"));
		buttons3.add(new ButtonAction(this, Global.name("abort"), "Close"));
		buttons.add(buttons3);

		if (allowSave) {
			final JEricPanel buttons4 = new MyPanel();
			buttons4.setLayout(new FlowLayout(FlowLayout.RIGHT));
			buttons4.add(new ButtonAction(this, Global.name("save"), "Save"));
			buttons4.add(new ButtonAction(this, Global.name("load"), "Load"));
			if (!extraButton.equals("")) {
				buttons4.add(new ButtonAction(this, extraButton, "Extra"));
			}
			buttons.add(buttons4);
		}

		add("South", new Panel3D(buttons));

		V = new Vector();
		for (int i = 0; i < v.size(); i++)
			V.addElement(v.elementAt(i));
		init();

		pack();
	}

	/**
	 * @param v
	 *            A vector of item editor elements.
	 */
	public void init() {
		for (int i = 0; i < V.size(); i++) {
			final ItemEditorElement e = (ItemEditorElement) V.elementAt(i);
			L.add(e.getName());
		}
		if (V.size() > 0) {
			L.select(0);
			select();
		}
	}

	/**
	 * React on Item changes.
	 */
	public void itemStateChanged(final ItemEvent e) {
		if (e.getSource() == L) {
			if (Displayed >= 0)
				define(Displayed);
			select();
		}
	}

	/**
	 * Show the currently selected item on the item panel.
	 */
	public void select() {
		final int i = L.getSelectedIndex();
		if (i < 0)
			return;
		P.display((ItemEditorElement) V.elementAt(i));
		Displayed = i;
	}

	@Override
	public void doAction(final String o) {
		if (o.equals("Delete")) {
			delete();
		} else if (o.equals("Insert")) {
			insert();
		} else if (o.equals("New")) {
			P.newElement();
		} else if (o.equals("Up")) {
			up();
		} else if (o.equals("Down")) {
			down();
		} else if (o.equals("OK")) {
			noteSize(Name);
			define();
			Aborted = false;
			doclose();
		} else if (o.equals("Help")) {
			P.help();
		} else if (o.equals("Save")) {
			define();
			Action = SAVE;
			Aborted = false;
			doclose();
		} else if (o.equals("Load")) {
			define();
			Action = LOAD;
			Aborted = false;
			doclose();
		} else if (o.equals("Extra")) {
			if (P.extra(V)) {
				Aborted = false;
				doclose();
			}
		} else
			super.doAction(o);
	}

	/**
	 * Insert the current element, renaming if necessary.
	 */
	void insert() {
		String name = P.getName();
		int Selected = L.getSelectedIndex();
		if (Selected < 0)
			Selected = 0;
		while (find(name))
			name = name + "*";
		P.setName(name);
		final ItemEditorElement e = P.getElement();
		L.add(e.getName(), Selected);
		L.select(Selected);
		V.insertElementAt(e, Selected);
	}

	/**
	 * Changes an item.
	 */
	void define(final int Selected) {
		final String name = P.getName();
		if (name.equals(""))
			return;
		if (!L.getItem(Selected).equals(name))
			L.replaceItem(name, Selected);
		V.setElementAt(P.getElement(), Selected);
		P.notifyChange(V, Selected);
	}

	/**
	 * Changes the currently selected item.
	 */
	void define() {
		final int Selected = L.getSelectedIndex();
		if (Selected < 0)
			return;
		define(Selected);
		L.select(Selected);
	}

	/**
	 * Find a plugin by name.
	 * 
	 * @return true, if it exists.
	 */
	boolean find(final String name) {
		int i;
		for (i = 0; i < V.size(); i++) {
			final ItemEditorElement t = ((ItemEditorElement) V.elementAt(i));
			if (t.getName().equals(name))
				return true;
		}
		return false;
	}

	/**
	 * Delete the current selected item.
	 */
	void delete() {
		int Selected = L.getSelectedIndex();
		if (Selected < 0)
			return;
		V.removeElementAt(Selected);
		L.remove(Selected);
		if (L.getItemCount() == 0)
			return;
		if (Selected >= L.getItemCount())
			Selected--;
		L.select(Selected);
		select();
	}

	/**
	 * Push the selected item one down.
	 */
	void down() {
		define();
		int Selected = L.getSelectedIndex();
		if (Selected < 0 || Selected + 1 >= V.size())
			return;
		final ItemEditorElement now = (ItemEditorElement) V.elementAt(Selected), next = (ItemEditorElement) V
		.elementAt(Selected + 1);
		V.setElementAt(next, Selected);
		V.setElementAt(now, Selected + 1);
		L.replaceItem(next.getName(), Selected);
		L.replaceItem(now.getName(), Selected + 1);
		Selected = Selected + 1;
		L.select(Selected);
		select();
	}

	/**
	 * Push the selected item one up.
	 */
	void up() {
		define();
		int Selected = L.getSelectedIndex();
		if (Selected <= 0)
			return;
		final ItemEditorElement now = (ItemEditorElement) V.elementAt(Selected), prev = (ItemEditorElement) V
		.elementAt(Selected - 1);
		V.setElementAt(prev, Selected);
		V.setElementAt(now, Selected - 1);
		L.replaceItem(prev.getName(), Selected);
		L.replaceItem(now.getName(), Selected - 1);
		Selected = Selected - 1;
		L.select(Selected);
		select();
	}

	/**
	 * @return If aborted.
	 */
	@Override
	public boolean isAborted() {
		return Aborted;
	}

	/**
	 * @return The list of item elements.
	 */
	public Vector getElements() {
		return V;
	}

	/**
	 * Return the action, if there is one
	 * 
	 * @return NONE,LOAD,SAVE
	 */
	public int getAction() {
		return Action;
	}
}