using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using HEAL.Attic;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
using HeuristicLab.Parameters;

namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
  [StorableType("819EF151-C9A4-48A9-A664-AF6E906DD553")]
  public class ExtendedConstraint : ParameterizedNamedItem, IExtendedConstraint {
    #region Constants
    private const string ExpressionParameterName = "Expression";
    private const string ShapeConstraintsParameterName = "Shape Constraints";
    #endregion

    #region Parameters
    public IFixedValueParameter<StringValue> ExpressionParameter => 
      (IFixedValueParameter<StringValue>)Parameters[ExpressionParameterName];

    public IFixedValueParameter<ShapeConstraints> ShapeConstraintsParameter =>
      (IFixedValueParameter<ShapeConstraints>)Parameters[ShapeConstraintsParameterName];
    #endregion

    #region Properties
    public string Expression => ExpressionParameter.Value.Value;
    public ISymbolicExpressionTree Tree => string.IsNullOrEmpty(Expression) ? null : Parser.Parse(Expression);
    public ShapeConstraints ShapeConstraints => ShapeConstraintsParameter.Value;
    private InfixExpressionParser Parser => new InfixExpressionParser();
    #endregion

    #region Constructors & Cloning
    public ExtendedConstraint() {
      Parameters.Add(new FixedValueParameter<StringValue>(ExpressionParameterName, new StringValue("")));
      Parameters.Add(new FixedValueParameter<ShapeConstraints>(ShapeConstraintsParameterName, new ShapeConstraints()));
    }

    protected ExtendedConstraint(ExtendedConstraint original, Cloner cloner) : base(original, cloner) { }

    [StorableConstructor]
    protected ExtendedConstraint(StorableConstructorFlag _) : base(_) { }

    public override IDeepCloneable Clone(Cloner cloner) =>
      new ExtendedConstraint(this, cloner);


    [StorableHook(HookType.AfterDeserialization)]
    private void AfterDeserialization() { }
    #endregion

    public override string ToString() => string.IsNullOrEmpty(Expression) ? ItemName : Expression;
  }
}