using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using HeuristicLab.Common;

namespace HeuristicLab.Problems.GrammaticalOptimization {
  public class SentenceSetStatistics {
    public int NumberOfSentences { get; private set; }
    public string BestSentence { get; private set; }
    public string FirstSentence { get; private set; }
    public string LastSentence { get; private set; }
    public double BestSentenceQuality { get; private set; }
    public double BestSentenceIndex { get; private set; }
    public double FirstSentenceQuality { get; private set; }
    public double LastSentenceQuality { get; private set; }
    public double AverageQuality { get { return sumQualities / NumberOfSentences; } }
    // public double MedianQuality { get; private set; }
    private double sumQualities;

    public void AddSentence(string sentence, double quality) {
      sumQualities += quality;
      NumberOfSentences++;

      if (NumberOfSentences == 1) {
        FirstSentence = sentence;
        FirstSentenceQuality = quality;
      }

      if (quality > BestSentenceQuality) {
        BestSentence = sentence;
        BestSentenceQuality = quality;
        BestSentenceIndex = NumberOfSentences;
      }

      LastSentence = sentence;
      LastSentenceQuality = quality;
    }

    public override string ToString() {
      return
        string.Format("Sentences: {0,10} avg.-quality {1,7:F5} best {2,7:F5} {3,2} {4,10} {5} first {6,7:F5} {7} last {8,7:F5} {9}",
      NumberOfSentences, AverageQuality,
      BestSentenceQuality, BestSentenceQuality.IsAlmost(1.0)?1.0:0.0, 
      BestSentenceIndex, BestSentence,
      FirstSentenceQuality, FirstSentence,
      LastSentenceQuality, LastSentence
     );
    }
  }
}