package org.basex.query.value.node;

import org.basex.data.*;
import org.basex.query.util.ft.*;
import org.basex.query.value.type.*;
import org.basex.util.ft.*;

/**
 * Disk-based full-text Node item.
 *
 * @author BaseX Team 2005-16, BSD License
 * @author Christian Gruen
 */
public final class FTNode extends DBNode {
  /** Length of the full-text token. */
  private final int tl;
  /** Total number of indexed results. */
  private final int is;
  /** Full-text matches. */
  private FTMatches matches;

  /**
   * Constructor, called by the sequential variant.
   * @param matches matches
   * @param score scoring
   */
  public FTNode(final FTMatches matches, final double score) {
    this(matches, null, 0, 0, 0, score);
  }

  /**
   * Constructor, called by the index variant.
   * @param matches full-text matches
   * @param d data reference
   * @param p pre value
   * @param tl token length
   * @param is number of indexed results
   * @param score score value out of the index
   */
  public FTNode(final FTMatches matches, final Data d, final int p, final int tl, final int is,
      final double score) {

    super(d, p, null, NodeType.TXT);
    this.matches = matches;
    this.tl = tl;
    this.is = is;
    if(score != -1) this.score = score;
  }

  /**
   * Assigns full-text matches.
   * @param match full-text matches
   */
  public void matches(final FTMatches match) {
    matches = match;
  }

  /**
   * Returns full-text matches.
   * @return full-text matches
   */
  public FTMatches matches() {
    return matches;
  }

  @Override
  public double score() {
    if(score == null) {
      if(matches == null) return 0;
      score = Scoring.textNode(matches.size(), is, tl, data().textLen(pre(), true));
    }
    return score;
  }

  @Override
  public String toString() {
    return super.toString() + (matches != null ? " (" + matches.size() + ')' : "");
  }
}
