using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using HeuristicLab.Data;
using HeuristicLab.Services.Optimization.ControllerService.Model;
using HeuristicLab.Optimization;
using HeuristicLab.Encodings.PermutationEncoding;
using HeuristicLab.Core;

namespace HeuristicLab.Services.Optimization.ControllerService {
  public interface IScenarioMapper {
    void MapScenario(OptimizationScenario scenario, IAlgorithm algorithm);
  }

  public static class HLMapper {
    public static DoubleValue ConvertToDoubleValue(Parameter parameter) {
      var dv = parameter.Value as DecimalValue;
      return new DoubleValue(dv.Value);      
    }

    public static Permutation ConvertToPermutation(Parameter parameter) {
      double[] input = (parameter.Value as DecimalVector).Value;
      int[] arr = new int[input.Length];
      for (int i = 0; i < input.Length; i++) {
        arr[i] = Convert.ToInt32(input[i]);
      }
      var valueObj = new HeuristicLab.Encodings.PermutationEncoding.Permutation(Encodings.PermutationEncoding.PermutationTypes.RelativeUndirected, arr);
      return valueObj;
    }

    public static DoubleMatrix ConvertToDoubleMatrix(Parameter parameter) {
      var matrix = parameter.Value as DecimalMatrix;
      // TODO: Check for empty matrices
      double[,] data = new double[matrix.Value.Length, matrix.Value[0].Length];
      for (int i=0; i < matrix.Value.Length; i++) {
        for (int j=0; j < matrix.Value[i].Length; j++) {
          data[i,j] = matrix.Value[i][j];
        }
      }
      return new DoubleMatrix(data);
    }

    public static HeuristicLab.Data.BoolValue ConvertToBoolValue(Parameter parameter) {
      return new HeuristicLab.Data.BoolValue((parameter.Value as HeuristicLab.Services.Optimization.ControllerService.Model.BoolValue).Value);
    }

    public static IntValue ConvertToIntValue(Parameter parameter) {
      return new IntValue((int)(parameter.Value as DecimalValue).Value);
    }

    public static PercentValue ConvertToPercentValue(Parameter parameter) {
      return new PercentValue((parameter.Value as DecimalValue).Value / 100);
    }

    public static string GetStringValue(Parameter parameter) {
      return (parameter.Value as HeuristicLab.Services.Optimization.ControllerService.Model.TypeValue).Value;
    }

    public static T FindInItemSet<T>(Core.IItemSet<T> items, Parameter what) where T : class,Core.INamedItem {
      return items.FirstOrDefault((entry) => { return entry.Name == (what.Value as HeuristicLab.Services.Optimization.ControllerService.Model.TypeValue).Value; });
    }

    public static T FindOperator<T>(IProblem problem, Parameter what) where T : IOperator {
      return problem.Operators.OfType<T>().FirstOrDefault((item) => { return item.ItemName == (what.Value as HeuristicLab.Services.Optimization.ControllerService.Model.TypeValue).Value; });
    }
  }
}