using System;
using HeuristicLab.Problems.GrammaticalOptimization;

namespace HeuristicLab.Algorithms.GrammaticalOptimization {
  public abstract class SolverBase : ISolver {
    public event Action<string, double> FoundNewBestSolution;
    public event Action<string, double> SolutionEvaluated;

    protected double bestQuality = double.NegativeInfinity;

    protected SolverBase() { }

    public abstract void Run(int maxEvaluations);

    protected virtual void OnSolutionEvaluated(string sentence, double quality) {
      RaiseSolutionEvaluated(sentence, quality);
      if (quality > bestQuality) {
        bestQuality = quality;
        RaiseFoundNewBestSolution(sentence, quality);
      }
    }

    private void RaiseSolutionEvaluated(string sentence, double quality) {
      var handler = SolutionEvaluated;
      if (handler != null) handler(sentence, quality);
    }
    private void RaiseFoundNewBestSolution(string sentence, double quality) {
      var handler = FoundNewBestSolution;
      if (handler != null) handler(sentence, quality);
    }
  }
}