/*******************************************************************************
 * This file is part of logisim-evolution.
 *
 *   logisim-evolution is 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, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   logisim-evolution 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 logisim-evolution.  If not, see <http://www.gnu.org/licenses/>.
 *
 *   Original code by Carl Burch (http://www.cburch.com), 2011.
 *   Subsequent modifications by :
 *     + Haute École Spécialisée Bernoise
 *       http://www.bfh.ch
 *     + Haute École du paysage, d'ingénierie et d'architecture de Genève
 *       http://hepia.hesge.ch/
 *     + Haute École d'Ingénierie et de Gestion du Canton de Vaud
 *       http://www.heig-vd.ch/
 *   The project is currently maintained by :
 *     + REDS Institute - HEIG-VD
 *       Yverdon-les-Bains, Switzerland
 *       http://reds.heig-vd.ch
 *******************************************************************************/

package com.cburch.logisim.std.wiring;

import java.awt.Font;
import java.util.Arrays;
import java.util.List;

import com.cburch.logisim.comp.TextField;
import com.cburch.logisim.data.AbstractAttributeSet;
import com.cburch.logisim.data.Attribute;
import com.cburch.logisim.data.BitWidth;
import com.cburch.logisim.data.Bounds;
import com.cburch.logisim.data.Direction;
import com.cburch.logisim.instance.StdAttr;

class TunnelAttributes extends AbstractAttributeSet {
	private static final List<Attribute<?>> ATTRIBUTES = Arrays
			.asList(new Attribute<?>[] { StdAttr.FACING, StdAttr.WIDTH,
					StdAttr.LABEL, StdAttr.LABEL_FONT });

	private Direction facing;
	private BitWidth width;
	private String label;
	private Font labelFont;
	private Bounds offsetBounds;
	private int labelX;
	private int labelY;
	private int labelHAlign;
	private int labelVAlign;

	public TunnelAttributes() {
		facing = Direction.WEST;
		width = BitWidth.ONE;
		label = "";
		labelFont = StdAttr.DEFAULT_LABEL_FONT;
		offsetBounds = null;
		configureLabel();
	}

	private void configureLabel() {
		Direction facing = this.facing;
		int x;
		int y;
		int halign;
		int valign;
		int margin = Tunnel.ARROW_MARGIN;
		if (facing == Direction.NORTH) {
			x = 0;
			y = margin;
			halign = TextField.H_CENTER;
			valign = TextField.V_TOP;
		} else if (facing == Direction.SOUTH) {
			x = 0;
			y = -margin;
			halign = TextField.H_CENTER;
			valign = TextField.V_BOTTOM;
		} else if (facing == Direction.EAST) {
			x = -margin;
			y = 0;
			halign = TextField.H_RIGHT;
			valign = TextField.V_CENTER_OVERALL;
		} else {
			x = margin;
			y = 0;
			halign = TextField.H_LEFT;
			valign = TextField.V_CENTER_OVERALL;
		}
		labelX = x;
		labelY = y;
		labelHAlign = halign;
		labelVAlign = valign;
	}

	@Override
	protected void copyInto(AbstractAttributeSet destObj) {
		; // nothing to do
	}

	@Override
	public List<Attribute<?>> getAttributes() {
		return ATTRIBUTES;
	}

	Direction getFacing() {
		return facing;
	}

	Font getFont() {
		return labelFont;
	}

	String getLabel() {
		return label;
	}

	int getLabelHAlign() {
		return labelHAlign;
	}

	int getLabelVAlign() {
		return labelVAlign;
	}

	int getLabelX() {
		return labelX;
	}

	int getLabelY() {
		return labelY;
	}

	Bounds getOffsetBounds() {
		return offsetBounds;
	}

	@Override
	@SuppressWarnings("unchecked")
	public <V> V getValue(Attribute<V> attr) {
		if (attr == StdAttr.FACING)
			return (V) facing;
		if (attr == StdAttr.WIDTH)
			return (V) width;
		if (attr == StdAttr.LABEL)
			return (V) label;
		if (attr == StdAttr.LABEL_FONT)
			return (V) labelFont;
		return null;
	}

	boolean setOffsetBounds(Bounds value) {
		Bounds old = offsetBounds;
		boolean same = old == null ? value == null : old.equals(value);
		if (!same) {
			offsetBounds = value;
		}
		return !same;
	}

	@SuppressWarnings("unchecked")
	@Override
	public <V> void setValue(Attribute<V> attr, V value) {
		V Oldvalue = null;
		if (attr == StdAttr.FACING) {
			facing = (Direction) value;
			configureLabel();
		} else if (attr == StdAttr.WIDTH) {
			width = (BitWidth) value;
		} else if (attr == StdAttr.LABEL) {
			String val = (String) value;
			Oldvalue = (V) label;
				label = val;
		} else if (attr == StdAttr.LABEL_FONT) {
			labelFont = (Font) value;
		} else {
			throw new IllegalArgumentException("unknown attribute");
		}
		offsetBounds = null;
		fireAttributeValueChanged(attr, value, Oldvalue);
	}
}