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package OO14route66;

/**
 * OO1route66 initial class
 * @author Pieter Koopman
 *
 * Enumeration class for driving directions
 */
public enum Direction
{
    North, East, South, West;

    /**
     * convert integer to direction
     * if number of directions is 2 only East and West are used,
     * otherwise all 4 directions are used
     * @param i the integer
     * @return the direction
     */
    public static Direction intToDirection(int i) {
        if (Model.DIRECTIONS == 2) {
            switch (i % 2) {
                case 0: return East;
                default: return West;
            }
        } else {
            switch (i % 4) {
                case 0: return North;
                case 1: return East;
                case 2: return South;
                default: return West;
            }
        }
    }
    
    /**
     * Get the opposite of a direction
     * @param direction
     * @return 
     */
    public static Direction opposite(Direction direction) {
        switch (direction) {
            case North: return South;
            case South: return North;
            case East: return West;
            case West: return East;
            default: return direction;
        }
    }

    /**
     * override standard toString
     * @return string representation of this value
     */
    @Override
    public String toString() {
        switch (this) {
            case North: return "North";
            case East:  return "East";
            case South: return "South";
            case West:  return "West";
            default:    return "Unknown direction";
        }
    }
}