using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
using HeuristicLab.Optimization;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.PluginInfrastructure;

namespace HeuristicLab.Problems.GrammaticalOptimization {
  [NonDiscoverableType]
  [StorableClass]
  [Item("GenericSymbExprProblem", "Represents grammatical optimization problems (using a symbolic expression tree encoding).")]
  public class GenericSymbExprProblem : SingleObjectiveHeuristicOptimizationProblem<IGenericSymbExprEvaluator, ISymbolicExpressionTreeCreator> {
    #region string consts
    private const string SymbolicExpressionTreeGrammarParameterName = "SymbolicExpressionTreeGrammar";
    private const string MaximumSymbolicExpressionTreeDepthParameterName = "MaximumSymbolicExpressionTreeDepth";
    private const string MaximumSymbolicExpressionTreeLengthParameterName = "MaximumSymbolicExpressionTreeLength";

    #endregion

    #region parameter properties
    public IValueParameter<ISymbolicExpressionTreeGrammar> SymbolicExpressionTreeGrammarParameter {
      get { return (IValueParameter<ISymbolicExpressionTreeGrammar>)Parameters[SymbolicExpressionTreeGrammarParameterName]; }
    }
    public IFixedValueParameter<IntValue> MaximumSymbolicExpressionTreeDepthParameter {
      get { return (IFixedValueParameter<IntValue>)Parameters[MaximumSymbolicExpressionTreeDepthParameterName]; }
    }
    public IFixedValueParameter<IntValue> MaximumSymbolicExpressionTreeLengthParameter {
      get { return (IFixedValueParameter<IntValue>)Parameters[MaximumSymbolicExpressionTreeLengthParameterName]; }
    }
    #endregion


    #region properties

    public ISymbolicExpressionTreeGrammar SymbolicExpressionTreeGrammar {
      get { return SymbolicExpressionTreeGrammarParameter.Value; }
      set { SymbolicExpressionTreeGrammarParameter.Value = value; }
    }
    public IntValue MaximumSymbolicExpressionTreeDepth {
      get { return MaximumSymbolicExpressionTreeDepthParameter.Value; }
    }
    public IntValue MaximumSymbolicExpressionTreeLength {
      get { return MaximumSymbolicExpressionTreeLengthParameter.Value; }
    }
    public new GenericSymbExprEvaluator Evaluator {
      get { return (GenericSymbExprEvaluator)base.Evaluator; }
    }

    #endregion
    [StorableConstructor]
    public GenericSymbExprProblem(bool deserializing) : base(deserializing) { }

    public GenericSymbExprProblem(GenericSymbExprProblem original, Cloner cloner) : base(original, cloner) { }

    public GenericSymbExprProblem(ISymbolicExpressionTreeProblem problem)
      : base(new GenericSymbExprEvaluator(problem.ConvertTreeToSentence, problem.Evaluate), new ProbabilisticTreeCreator()) {
      var grammar = new GenericSymbExprGrammar(problem.TreeBasedGPGrammar);
      Parameters.Add(new ValueParameter<ISymbolicExpressionGrammar>(SymbolicExpressionTreeGrammarParameterName, grammar));
      Parameters.Add(new FixedValueParameter<IntValue>(MaximumSymbolicExpressionTreeLengthParameterName, new IntValue(50)));
      Parameters.Add(new FixedValueParameter<IntValue>(MaximumSymbolicExpressionTreeDepthParameterName, new IntValue(15)));

      Maximization = new BoolValue(true);
      BestKnownQuality = new DoubleValue(1.0);

      Operators.AddRange(ApplicationManager.Manager.GetInstances<ISymbolicExpressionTreeOperator>());
    }

    public override IDeepCloneable Clone(Cloner cloner) {
      return new GenericSymbExprProblem(this, cloner);
    }
  }
}