#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2012 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.Windows.Forms;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.DataImporter.Data.Model {
  [StorableClass]
  public class ColumnGroup {

    public ColumnGroup()
      : base() {
      this.columns = new List<ColumnBase>();
      this.sortedColumnIndexes = new List<int>();
    }

    public ColumnGroup(string name)
      : this() {
      this.name = name;
    }

    private bool active;
    public bool Active {
      get { return active; }
      set { this.active = value; }
    }

    public IEnumerable<SortOrder> SortOrdersForColumns {
      get { return columns.Select(col => col.SortOrder); }
      set {
        int i = 0;
        foreach (SortOrder order in value) {
          columns[i].SortOrder = order;
          i++;
        }
      }
    }

    [Storable]
    private ICollection<int> sortedColumnIndexes;
    public ICollection<int> SortedColumnIndexes {
      get { return this.sortedColumnIndexes; }
      set { this.sortedColumnIndexes = value; }
    }

    public bool Sorted {
      get { return SortOrdersForColumns.Any(x => x != SortOrder.None); }
    }

    public int SortedColumnsCount {
      get { return SortOrdersForColumns.Count(x => x != SortOrder.None); }
    }

    public void ResetSorting() {
      foreach (ColumnBase column in this.columns)
        column.SortOrder = SortOrder.None;
      sortedColumnIndexes.Clear();
    }

    public string KeyString(int row) {
      string x = "";
      IComparable val;
      foreach (int colIndex in sortedColumnIndexes) {
        val = columns[colIndex].GetValue(row);
        if (val != null)
          x += val.ToString();
      }
      return x;
    }

    [Storable]
    private string name;
    public string Name {
      get { return this.name; }
      set { this.name = value; }
    }

    [Storable]
    private List<ColumnBase> columns;
    public IEnumerable<ColumnBase> Columns {
      get { return this.columns; }
    }

    public int RowCount {
      get {
        return this.columns.Count == 0 ? 0 :
          this.columns.Max<ColumnBase, int>(x => x.TotalValuesCount);
      }
    }

    public IEnumerable<ColumnBase> SelectedColumns {
      get { return this.columns.Where<ColumnBase>(col => col.Selected); }
    }

    public int[] SelectedColumnIndexes {
      get {
        List<int> selectedIndexes = new List<int>();
        for (int i = 0; i < this.columns.Count; i++)
          if (columns[i].Selected)
            selectedIndexes.Add(i);
        return selectedIndexes.ToArray();
      }
    }

    public void ClearSelectedColumns() {
      foreach (ColumnBase col in this.columns)
        col.Selected = false;
    }

    public void SelectAllColumns() {
      foreach (ColumnBase col in this.columns)
        col.Selected = true;
    }


    public void AddColumn(ColumnBase column) {
      column.Changed += ColumnChanged;
      this.columns.Add(column);
    }

    public void AddColumns(IEnumerable<ColumnBase> columns) {
      foreach (ColumnBase col in columns)
        this.AddColumn(col);
    }

    public void InsertColumn(int position, ColumnBase column) {
      column.Changed += ColumnChanged;
      this.columns.Insert(position, column);
    }

    public void RemoveColumn(ColumnBase column) {
      if (sortedColumnIndexes.Contains(IndexOfColumn(column)))
        ResetSorting();
      column.Changed -= ColumnChanged;
      this.columns.Remove(column);
    }

    public void RemoveColumn(int columnIndex) {
      if (sortedColumnIndexes.Contains(columnIndex))
        ResetSorting();
      columns[columnIndex].Changed -= ColumnChanged;
      this.columns.RemoveAt(columnIndex);
    }

    public int IndexOfColumn(ColumnBase column) {
      return this.columns.IndexOf(column);
    }

    public void ClearColumns() {
      foreach (ColumnBase col in this.columns)
        col.Changed -= ColumnChanged;
      ResetSorting();
      this.columns.Clear();
    }

    public ColumnBase GetColumn(int position) {
      return this.columns[position];
    }

    public void ReplaceColumn(int position, ColumnBase column) {
      if (sortedColumnIndexes.Contains(position))
        ResetSorting();
      this.columns[position].Changed -= ColumnChanged;
      column.Changed += ColumnChanged;
      this.columns[position] = column;
    }

    #region methods for row manipulation
    public IComparable[] GetRow(int index) {
      IComparable[] ret = new IComparable[this.columns.Count];
      for (int i = 0; i < this.columns.Count; i++)
        ret[i] = this.columns[i].GetValue(index);
      return ret;
    }

    public IComparable[] GetEmptyRow() {
      IComparable[] ret = new IComparable[this.columns.Count];
      for (int i = 0; i < this.columns.Count; i++)
        ret[i] = null;
      return ret;
    }

    public void AddRow(IComparable[] row) {
      for (int i = 0; i < this.columns.Count; i++)
        this.columns[i].AddValueOrNull(row[i]);
    }

    public void DeleteRow(int index) {
      for (int i = 0; i < this.columns.Count; i++)
        this.columns[i].RemoveValue(index);
    }

    public void InsertRow(int index, IComparable[] row) {
      for (int i = 0; i < this.columns.Count; i++)
        this.columns[i].InsertValue(index, row[i]);
    }
    #endregion

    public void ColumnChanged(object sender, EventArgs e) {
      this.OnChanged();
    }

    public override string ToString() {
      return this.name;
    }

    public event EventHandler Changed;
    protected virtual void OnChanged() {
      if (this.Changed != null)
        this.Changed(this, EventArgs.Empty);
    }
    public void FireChanged() {
      this.OnChanged();
    }
  }
}