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// -------------------------------------------------------------------------
/**
 * Accumulates results from a DNA tree search operation.
 * Tracks matched sequences and the number of nodes visited.
 *
 * @author Ishita Punna
 * @author Leguejou Awunganyi
 * @version Spring 2026
 */
public class SearchResult {

    /** The sequences found during this search. */
    private String[] same;

    /** The number of matches found. */
    private int sameCount;

    /** The number of nodes visited during the search. */
    private int nodesVisited;

    /** Initial capacity for matches array. */
    private static final int INIT_CAP = 16;

    // ----------------------------------------------------------
    /**
     * Construct a new empty SearchResult.
     */
    public SearchResult() {
        same = new String[INIT_CAP];
        sameCount = 0;
        nodesVisited = 0;
    }


    // ----------------------------------------------------------
    /**
     * Add a matched sequence to results.
     *
     * @param sequence
     *            The matched sequence
     */
    public void addMatch(String sequence) {
        if (sameCount == same.length) {
            String[] bigger = new String[same.length * 2];
            for (int i = 0; i < same.length; i++) {
                bigger[i] = same[i];
            }
            same = bigger;
        }
        same[sameCount] = sequence;
        sameCount++;
    }


    // ----------------------------------------------------------
    /**
     * Increment the visited node counter.
     */
    public void visit() {
        nodesVisited++;
    }


    // ----------------------------------------------------------
    /**
     * Get the number of nodes visited.
     *
     * @return node visit count
     */
    public int getNodesVisited() {
        return nodesVisited;
    }


    // ----------------------------------------------------------
    /**
     * Get the number of matches found.
     *
     * @return match count
     */
    public int getSameCount() {
        return sameCount;
    }


    // ----------------------------------------------------------
    /**
     * Get a matched sequence by index.
     *
     * @param index
     *            The index to retrieve
     * @return The sequence at that index
     */
    public String getSame(int index) {
        return same[index];
    }
}