using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using HeuristicLab.Collections;
using HeuristicLab.MainForm.WindowsForms;
using HeuristicLab.Common;
using HeuristicLab.MainForm;

namespace HeuristicLab.OKB.AlgorithmHost {

  [ViewAttribute("Mapping View")]
  [Content(typeof(Mapping), true)]  
  public partial class MappingView : ContentView {
    
    public MappingView() {
      InitializeComponent();
    }

    public new Mapping Content {
      get { return (Mapping)base.Content; }
      set { base.Content = value; }
    }

    protected override void RegisterContentEvents() {
      base.RegisterContentEvents();
      Content.Map.CollectionReset += Content_MapChanged;
      Content.Map.ItemsAdded += Content_MapChanged;
      Content.Map.ItemsRemoved += Content_MapChanged;
      Content.Map.ItemsReplaced += Content_MapChanged;
      Content.Values.CollectionReset += Content_ValuesChanged;
      Content.Values.ItemsAdded += Content_ValuesChanged;
      Content.Values.ItemsRemoved += Content_ValuesChanged;
    }

    protected override void DeregisterContentEvents() {
      base.DeregisterContentEvents();
      Content.Map.CollectionReset -= Content_MapChanged;
      Content.Map.ItemsAdded -= Content_MapChanged;
      Content.Map.ItemsRemoved -= Content_MapChanged;
      Content.Map.ItemsReplaced -= Content_MapChanged;
      Content.Values.CollectionReset -= Content_ValuesChanged;
      Content.Values.ItemsAdded -= Content_ValuesChanged;
      Content.Values.ItemsRemoved -= Content_ValuesChanged;
    }

    void Content_MapChanged(object sender, CollectionItemsChangedEventArgs<KeyValuePair<string, string>> e) {
      mappingTable.BeginLoadData();
      mappingTable.Clear();
      if (Content != null) {
        foreach (var mapping in Content.Map) {
          mappingTable.Rows.Add(new object[] { mapping.Key, mapping.Value });
        }
      }
      mappingTable.EndLoadData();
      mappingTable.AcceptChanges();
    }

    void Content_ValuesChanged(object sender, CollectionItemsChangedEventArgs<string> e) {
      ValueTable.BeginLoadData();
      ValueTable.Clear();
      if (Content != null) {
        foreach (var value in Content.Values) {
          ValueTable.Rows.Add(new object[] { value });
        }
      }
      ValueTable.EndLoadData();
      ValueTable.AcceptChanges();
    }

    protected override void OnContentChanged() {
      base.OnContentChanged();
      if (Content == null) {
        mappingTable.Clear();
        ValueTable.Clear();
      } else {
        Content_MapChanged(this, new CollectionItemsChangedEventArgs<KeyValuePair<string, string>>(Enumerable.Empty<KeyValuePair<string, string>>()));
        Content_ValuesChanged(this, new CollectionItemsChangedEventArgs<string>(Enumerable.Empty<string>()));
      }
    }

    private void mappingGridView_CellValidating(object sender, DataGridViewCellValidatingEventArgs e) {
      mappingGridView.EndEdit();
      if (e.ColumnIndex != valueColumn.Ordinal || e.FormattedValue == DBNull.Value)
        return;
      DataGridViewRow currentRow = mappingGridView.Rows[e.RowIndex];
      foreach (DataGridViewRow row in mappingGridView.Rows) {
        if (row.Index == e.RowIndex)
          continue;
        if (row.Cells[e.ColumnIndex].Value == e.FormattedValue) {
          currentRow.ErrorText = "ERROR: Duplicate DB parameter!";
          e.Cancel = true;
          return;
        }
      }
      if (currentRow.ErrorText == "" && ((string)e.FormattedValue).Contains('.')) {
        currentRow.ErrorText = "WARNING: Compound parameter should not be directly mapped";
      } else {
        currentRow.ErrorText = "";
      }
    }

    private void parameterMappingGridView_CellValidated(object sender, DataGridViewCellEventArgs e) {
      if (e.ColumnIndex != valueColumn.Ordinal)
        return;
      mappingTable.AcceptChanges();
      object value = mappingGridView[valueColumn.Ordinal, e.RowIndex].Value;
      object key = mappingGridView[keyColumn.Ordinal, e.RowIndex].Value;
      if (value != DBNull.Value)
        Content.Map[(string)key] = (string)value;
      else
        Content.Map[(string)key] = null;
    }

    private void mappingGridView_DataError(object sender, DataGridViewDataErrorEventArgs e) {
    }
  }
}