#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2008 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 System.Text;
using HeuristicLab.Core;
using System.Collections;
using HeuristicLab.CEDMA.DB.Interfaces;
using System.Xml;
using System.Runtime.Serialization;
using System.IO;
using HeuristicLab.PluginInfrastructure;
using HeuristicLab.Data;
using HeuristicLab.DataAnalysis;
using System.Drawing;

namespace HeuristicLab.CEDMA.Core {
  public class Results : ItemBase {
    public static string[] CategoricalVariables {
      get { return new string[] { "TargetVariable" }; }
    }

    public static string[] OrdinalVariables {
      get { return new string[] { "ValidationMeanAbsolutePercentageError" }; }
    }

    private IStore store;
    public IStore Store {
      get { return store; }
      set {
        store = value;
      }
    }

    private Entity dataSetEntity;

    public Results(IStore store) {
      this.store = store;
    }

    internal void FilterDataSet(Entity entity) {
      this.dataSetEntity = entity;
    }

    private List<ResultsEntry> entries = null;
    private bool cached = false;
    public IEnumerable<ResultsEntry> GetEntries() {
      if (!cached)
        return SelectRows();
      return entries.AsEnumerable();
    }

    private IEnumerable<ResultsEntry> SelectRows() {
      if (store == null) yield break;

      //var models = store.Select(new Statement(dataSetEntity, Ontology.PredicateHasModel, Ontology.AnyEntity));

      ////var results = store.Select(new Statement(dataSetEntity, Ontology.PredicateHasModel, Ontology.AnyEntity))
      ////   .SelectMany(x => store.Select(new SelectFilter(
      ////     new Entity[] { (Entity)x.Property },
      ////     new Entity[] { Ontology.PredicateModelAttribute },
      ////     new Resource[] { Ontology.AnyEntity })))
      ////   .SelectMany(x =>
      ////     store.Select(
      ////        new SelectFilter(
      ////        new Entity[] { (Entity)x.Property },
      ////        new Entity[] { Ontology.PredicateModelAttributeName },
      ////        new Entity[] { Ontology.AnyEntity })).Select(y =>
      ////          new {
      ////            Model = x.Subject,
      ////            Attribute = (Entity)x.Property,
      ////            AttributeName = (Literal)y.Property
      ////          }))
      ////   .SelectMany(x =>
      ////     store.Select(
      ////       new Statement(x.Attribute, Ontology.PredicateModelAttributeValue, Ontology.AnyEntity))
      ////       .Select(y =>
      ////         new {
      ////           Model = x.Model.Uri,
      ////           AttributeName = x.AttributeName.Value,
      ////           AttributeValue = ((Literal)y.Property).Value
      ////         })).GroupBy(x => x.Model);

      //entries = new List<ResultsEntry>();
      //foreach (var model in models) {
      //  var attributes = store.Select(new Statement((Entity)model.Property, Ontology.PredicateModelAttribute, Ontology.AnyEntity));

      //  foreach (var attr in attributes) {
      //    var namesAndValues = store
      //      .Select(new SelectFilter(new Entity[] { (Entity)attr.Property },
      //        new Entity[] { Ontology.PredicateModelAttributeName, Ontology.PredicateModelAttributeValue },
      //        new Entity[] { Ontology.AnyEntity }));
      //  }
      //}

      //foreach (var row in results) {
      //  ResultsEntry entry = new ResultsEntry(row.First().Model);
      //  foreach (var attr in row) {
      //    entry.Set((string)attr.AttributeName, attr.AttributeValue);
      //  }
      //  entries.Add(entry);
      //  yield return entry;
      //}

      //FireChanged();
      //cached = true;
    }

    internal IEnumerable<string> SelectModelAttributes() {
      if (store == null) yield break;

      //var attributeNames =
      //  store.Select(new Statement(Ontology.AnyEntity, Ontology.PredicateModelAttributeName, Ontology.AnyEntity))
      //  .Select(s => (string)((Literal)s.Property).Value)        
      //  .Distinct();
      //foreach (var name in attributeNames) {
      //  yield return name;
      //}
    }
  }
}