package pathgame.algorithm;

/** Class that stores data for a graph edge
 *
 */
public class TreeEdge implements Comparable< TreeEdge > {
    private int src, dest, weight;
    private boolean checked = false;

    /** Creates a new TreeEdge with the given parameters
     *
     * @param src the index of the source vertex of the edge
     * @param dest the index of the destination vertex of the edge
     * @param weight the weight of the edge
     */
    public TreeEdge(int src, int dest, int weight) {
        this.src = src;
        this.dest = dest;
        this.weight = weight;
    }

    /** Returns the index of the source vertex of the edge
     *
     * @return the index of the source vertex of the edge
     */
    public int getSrc() {
        return src;
    }

    /** Returns the index of the destination vertex of the edge
     *
     * @return the index of the destination vertex of the edge
     */
    public int getDest() {
        return dest;
    }

    /** Returns the index of the other vertex, using the given vertex
     *
     * @param other the vertex index that shouldn't be returned
     * @return the other vertex index
     */
    public int getOtherVertex(int other) {
        if(other == src) {
            return dest;
        }
        else  {
            return src;
        }
    }

    /** Returns the weight of the edge
     *
     * @return the weight of the edge
     */
    public Integer getWeight() {
        return weight;
    }

    /** Returns isChecked, which is true if the TreeEdge has been checked
     *
     * @return whether this TreeEdge has been checked
     */
    public boolean isChecked() {
        return checked;
    }

    /** Sets isChecked, which is true if the TreeEdge has been checked
     *
     * @param checked new status of whether this TreeEdge has been checked
     */
    public void setChecked(boolean checked) {
        this.checked = checked;
    }

    /** Used for sorting Collections of TreeEdges
     *
     * @param o the TreeEdge that this one is being compared to
     * @return the result of compareTo()
     */
    @Override
    public int compareTo(TreeEdge o) {
        return this.getWeight().compareTo(o.getWeight());
    }
}