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// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
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 * |      PlantUML : a free UML diagram generator
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 * (C) Copyright 2009-2024, Arnaud Roques
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 * THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
 * LICENSE ("AGREEMENT"). [Eclipse Public License - v 1.0]
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 * RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
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 * You may obtain a copy of the License at
 *
 * http://www.eclipse.org/legal/epl-v10.html
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 * Unless required by applicable law or agreed to in writing, software
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * limitations under the License.
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 * PlantUML can occasionally display sponsored or advertising messages. Those
 * messages are usually generated on welcome or error images and never on
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 * See https://plantuml.com/professional if you want to remove them
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 * Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
 * are owned by the author of their corresponding sources code (that is, their
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 * This is the IGY distribution (Install GraphViz by Yourself).
 * You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
 * (see https://plantuml.com/graphviz-dot )
 *
 * Icons provided by OpenIconic :  https://useiconic.com/open
 * Archimate sprites provided by Archi :  http://www.archimatetool.com
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 * ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
 * ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
 * CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
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 *
 */
package net.sourceforge.plantuml.utils;

import net.sourceforge.plantuml.klimt.geom.XPoint2D;

public enum Direction {
	RIGHT, LEFT, DOWN, UP;

	public Direction getInv() {
		if (this == RIGHT)
			return LEFT;

		if (this == LEFT)
			return RIGHT;

		if (this == DOWN)
			return UP;

		if (this == UP)
			return DOWN;

		throw new IllegalStateException();
	}

	public String getShortCode() {
		return name().substring(0, 1);
	}

	public static Direction fromChar(char c) {
		if (c == '<') {
			return Direction.LEFT;
		}
		if (c == '>') {
			return Direction.RIGHT;
		}
		if (c == '^') {
			return Direction.UP;
		}
		return Direction.DOWN;
	}

	public Direction clockwise() {
		if (this == RIGHT) {
			return DOWN;
		}
		if (this == LEFT) {
			return UP;
		}
		if (this == DOWN) {
			return LEFT;
		}
		if (this == UP) {
			return RIGHT;
		}
		throw new IllegalStateException();
	}

	public static Direction leftOrRight(XPoint2D p1, XPoint2D p2) {
		if (p1.getX() < p2.getX()) {
			return Direction.LEFT;
		}
		if (p1.getX() > p2.getX()) {
			return Direction.RIGHT;
		}
		throw new IllegalArgumentException();
	}

	public static Direction fromVector(XPoint2D p1, XPoint2D p2) {
		final double x1 = p1.getX();
		final double y1 = p1.getY();
		final double x2 = p2.getX();
		final double y2 = p2.getY();
		if (x1 == x2 && y1 == y2) {
			return null;
		}
		if (x1 == x2) {
			if (y2 > y1) {
				return Direction.DOWN;
			}
			return Direction.UP;
		}
		if (y1 == y2) {
			if (x2 > x1) {
				return Direction.RIGHT;
			}
			return Direction.LEFT;
		}
		throw new IllegalArgumentException("Not a H or V line!");

	}

	public static Direction lazzyValueOf(String s) {
		s = s.toUpperCase();
		if ("TOP".equals(s))
			return Direction.UP;
		if ("BOTTOM".equals(s))
			return Direction.DOWN;
		return valueOf(s);
	}
}