#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2019 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using HeuristicLab.Common;
using HEAL.Attic;

namespace HeuristicLab.Core {
  /// <summary>
  /// A base class for items which have a name and contain parameters.
  /// </summary>
  [Item("ParameterizedNamedItem", "A base class for items which have a name and contain parameters.")]
  [StorableType("058C7952-437D-4EA0-9F12-23E8A67C5352")]
  public abstract class ParameterizedNamedItem : NamedItem, IParameterizedNamedItem {
    [Storable]
    private ParameterCollection parameters;
    protected ParameterCollection Parameters {
      get { return parameters; }
    }
    private ReadOnlyKeyedItemCollection<string, IParameter> readOnlyParameters;
    IKeyedItemCollection<string, IParameter> IParameterizedItem.Parameters {
      get {
        if (readOnlyParameters == null) readOnlyParameters = parameters.AsReadOnly();
        return readOnlyParameters;
      }
    }

    [StorableConstructor]
    protected ParameterizedNamedItem(StorableConstructorFlag _) : base(_) { }
    protected ParameterizedNamedItem(ParameterizedNamedItem original, Cloner cloner)
      : base(original, cloner) {
      parameters = cloner.Clone(original.parameters);
      readOnlyParameters = null;
    }
    protected ParameterizedNamedItem()
      : base() {
      name = ItemName;
      description = ItemDescription;
      parameters = new ParameterCollection();
      readOnlyParameters = null;
    }
    protected ParameterizedNamedItem(string name)
      : base(name) {
      description = ItemDescription;
      parameters = new ParameterCollection();
      readOnlyParameters = null;
    }
    protected ParameterizedNamedItem(string name, ParameterCollection parameters)
      : base(name) {
      description = ItemDescription;
      this.parameters = parameters;
      readOnlyParameters = null;
    }
    protected ParameterizedNamedItem(string name, string description)
      : base(name, description) {
      parameters = new ParameterCollection();
      readOnlyParameters = null;
    }
    protected ParameterizedNamedItem(string name, string description, ParameterCollection parameters)
      : base(name, description) {
      this.parameters = parameters;
      readOnlyParameters = null;
    }

    public virtual void CollectParameterValues(IDictionary<string, IItem> values) {
      foreach (IValueParameter param in parameters.OfType<IValueParameter>()) {
        var children = GetCollectedValues(param);
        foreach (var c in children) {
          if (String.IsNullOrEmpty(c.Key))
            values.Add(param.Name, c.Value);
          else values.Add(param.Name + "." + c.Key, c.Value);
        }
      }
    }

    protected virtual IEnumerable<KeyValuePair<string, IItem>> GetCollectedValues(IValueParameter param) {
      if (param.Value == null) yield break;
      if (param.GetsCollected) yield return new KeyValuePair<string, IItem>(String.Empty, param.Value);
      var parameterizedItem = param.Value as IParameterizedItem;
      if (parameterizedItem != null) {
        var children = new Dictionary<string, IItem>();
        parameterizedItem.CollectParameterValues(children);
        foreach (var child in children) yield return child;
      }
    }
  }
}