using System;
using System.Linq;
using HeuristicLab.Core;
using HeuristicLab.Optimization;

namespace HeuristicLab.JsonInterface {
  public class AlgorithmConverter : ParameterizedItemConverter {
    public override int Priority => 30;

    public override bool CanConvertType(Type t) => 
      t.GetInterfaces().Any(x => x == typeof(IAlgorithm));

    public override void Inject(IItem item, IJsonItem data, IJsonItemConverter root) {
      base.Inject(item, data, root);
      IAlgorithm algorithm = item as IAlgorithm;
      var collection = data.Children.Where(x => x.Name == algorithm.Problem.ItemName);
      if(collection.Count() > 0) {
        IJsonItem problemData = collection.First();
        root.Inject(algorithm.Problem, problemData, root);
      }
    }
    
    public override IJsonItem Extract(IItem value, IJsonItemConverter root) {
      IJsonItem item = base.Extract(value, root);
      IAlgorithm algorithm = value as IAlgorithm;
      item.AddChildren(root.Extract(algorithm.Problem, root));
      return item;
    }
  }
}