using GeoAPI.Geometries;
using HeuristicLab.BioBoost.Persistence;
using HeuristicLab.BioBoost.ProblemDescription;
using HeuristicLab.Core.Views;
using HeuristicLab.MainForm;
using HeuristicLab.Persistence.Default.Xml;
using SharpMap.Data;
using SharpMap.Data.Providers;
using SharpMap.Forms;
using SharpMap.Layers;
using SharpMap.Rendering.Thematics;
using SharpMap.Styles;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.IO;
using System.Windows.Forms;
using ColorBlend = SharpMap.Rendering.Thematics.ColorBlend;

namespace HeuristicLab.BioBoost.Views {

  [Content(typeof(BioBoostProblemData), IsDefaultView = true)]
  public partial class BioBoostProblemDataView : NamedItemView {

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

    private VectorLayer regions;
    private FilterDialog filterDialog;

    public BioBoostProblemDataView() {
      InitializeComponent();
      filterDialog = new FilterDialog();
    }

    private GeometryFeatureProvider gfp2;
    private void PrepareMap(object sender, DoWorkEventArgs e) {
      var gfp = ShapeFileLoader.LoadShapeFile("C:\\Users\\P40031\\SkyDrive\\NUTS3\\NUTS3_regions_2010_WGS84.shp"); // TODO!
      var ms = new MemoryStream();
      XmlGenerator.Serialize(gfp, ms);
      gfp2 = XmlParser.Deserialize<GeometryFeatureProvider>(new MemoryStream(ms.ToArray()));
    }

    private void ShowMap(object sender, RunWorkerCompletedEventArgs e) {
      var outline = new Pen(Color.FromArgb(128, Color.White), 0.5f);
      var small = new VectorStyle { Fill = Brushes.Blue, EnableOutline = true, Outline = outline };
      var large = new VectorStyle { Fill = Brushes.Red, EnableOutline = true, Outline = outline };
      regions = new VectorLayer("NUTS3 Regions") {
        DataSource = gfp2,
        Theme =
          new GradientTheme("Shape_Area", 0, 5, small, large) { FillColorBlend = ColorBlend.Rainbow5 },
      };

      // add labels
      var l = new LabelLayer("NUTS3 Labels") {
        DataSource = gfp2,
        LabelColumn = "NUTS_ID",
        PriorityColumn = "Shape_Area",
      };

      // add geometries
      var geometries = new Collection<IGeometry>();
      GeoAPI.GeometryServiceProvider.Instance = new NetTopologySuite.NtsGeometryServices();
      var f = GeoAPI.GeometryServiceProvider.Instance.CreateGeometryFactory(4326);
      regions.DataSource.Open();
      var rows = regions.DataSource.GetObjectIDsInView(regions.Envelope);
      foreach (var row in rows) {
        var source = regions.DataSource.GetFeature(row).Geometry.Centroid;
        var ds = new FeatureDataSet();
        regions.DataSource.ExecuteIntersectionQuery(source.Buffer(0.1), ds);
        var neighbors = ds.Tables[0].Rows;
        if (neighbors.Count > 0) {
          var ls = f.CreateLineString(new[] {
            source.Coordinate,
            ((FeatureDataRow) neighbors[rng.Next(neighbors.Count)]).
                                        Geometry.Centroid.
                                        Coordinate,
          });
          geometries.Add(ls);
        }
      }
      regions.DataSource.Close();
      var v = new VectorLayer("Vectors") {
        DataSource = new GeometryProvider(geometries),
      };
      v.Style.Line.SetLineCap(LineCap.NoAnchor, LineCap.ArrowAnchor, DashCap.Flat);

      // add layers
      mapBox.Map.Layers.Add(regions);
      mapBox.Map.Layers.Add(l);
      mapBox.Map.Layers.Add(v);

      // configure map
      mapBox.Map.ZoomToExtents();
      mapBox.Refresh();
      mapBox.ActiveTool = MapBox.Tools.Pan;
      tabControl.SelectedTab = mapPage;
    }

    private readonly Dictionary<string, VectorStyle> styles = new Dictionary<string, VectorStyle>();
    private readonly Random rng = new Random();
    private VectorStyle GetRandomStyle(FeatureDataRow row) {
      var name = row["NUTS_ID"].ToString();
      VectorStyle style;
      if (!styles.TryGetValue(name, out style)) {
        style = new VectorStyle {
          Fill = new SolidBrush(Color.FromArgb(rng.Next(256), rng.Next(256), rng.Next(256)))
        };
        styles[name] = style;
      }
      return style;
    }

    protected override void DeregisterContentEvents() {
      base.DeregisterContentEvents();
      Content.GeometryChanged -= GeometryChanged;
    }

    protected override void RegisterContentEvents() {
      base.RegisterContentEvents();
      Content.GeometryChanged += GeometryChanged;
    }


    #region Event Handlers (Content)
    private void GeometryChanged(object sender, EventArgs eventArgs) {
      if (InvokeRequired) {
        Invoke(new EventHandler<EventArgs>(GeometryChanged), new object[] { sender, eventArgs });
      } else {
        UpdateMap();
      }
    }
    #endregion

    protected override void OnContentChanged() {
      base.OnContentChanged();
      if (Content == null) {
        parameterCollectionView.Content = null;
      } else {
        parameterCollectionView.Content = Content.Parameters;
      }
      UpdateMap();
    }

    protected override void SetEnabledStateOfControls() {
      base.SetEnabledStateOfControls();
      parameterCollectionView.Enabled = Content != null;
      loadShapeFileButton.Enabled = Content != null;
      importFeedstockButton.Enabled = Content != null;
      importDistancesButton.Enabled = Content != null;
    }

    private void UpdateMap() {
      mapBox.Map.Layers.Clear();
      mapBox.ShowProgressUpdate = false;
      if (Content == null || Content.Geometry == null) return;
      mapBox.ShowProgressUpdate = true;
      var outline = new Pen(Color.FromArgb(128, Color.White), 0.5f);
      var small = new VectorStyle { Fill = Brushes.Blue, EnableOutline = true, Outline = outline };
      var large = new VectorStyle { Fill = Brushes.Red, EnableOutline = true, Outline = outline };
      mapBox.Map.Layers.Add(new VectorLayer("Regions", Content.Geometry) {
        //Theme = new GradientTheme("Shape_Area", 0, 5, small, large) {
        //FillColorBlend = ColorBlend.Rainbow5,
        //},
      });
      mapBox.Map.ZoomToExtents();
      mapBox.Refresh();
      mapBox.ActiveTool = MapBox.Tools.Pan;
    }

    #region Event Handlers (child controls)
    private void mapBox_MouseClick(object sender, MouseEventArgs e) {
      if (e.Button == MouseButtons.Right) {
        var c = mapBox.Map.ImageToWorld(e.Location);
        var f = GeoAPI.GeometryServiceProvider.Instance.CreateGeometryFactory(4326);
        var ds = new FeatureDataSet();
        regions.ExecuteIntersectionQuery(f.CreatePoint(c), ds);
        if (ds.Tables[0].Rows.Count > 0) {
          var text = ds.Tables[0].Rows[0]["NUTS_ID"].ToString();
          toolTip.SetToolTip(mapBox, text);
        }
      }
    }

    private void importFeedstockButton_Click(object sender, EventArgs e) {
      openFileDialog.Filter = "Comma Separted Value|*.csv|All Files|*.*";
      if (openFileDialog.ShowDialog() == DialogResult.OK) {
        try {
          Enabled = false;
          Content.LoadFeedstockPotentials(openFileDialog.FileName);
        } catch (Exception x) {
          PluginInfrastructure.ErrorHandling.ShowErrorDialog(this, x);
        } finally {
          Enabled = true;
        }
      }
    }

    private void loadShapeFileButton_Click(object sender, EventArgs e) {
      openFileDialog.Filter = "ESRI Shape Files|*.shp|All Files|*.*";
      if (openFileDialog.ShowDialog() == DialogResult.OK) {
        try {
          Enabled = false;
          Content.LoadShapeFile(openFileDialog.FileName);
          tabControl.SelectedTab = mapPage;
        } catch (Exception x) {
          PluginInfrastructure.ErrorHandling.ShowErrorDialog(this, x);
        } finally {
          Enabled = true;
        }
      }
    }

    private void importDistancesButton_Click(object sender, EventArgs e) {
      openFileDialog.Filter = "Comma Serparted Value|*.csv|All Files|*.*";
      if (openFileDialog.ShowDialog() == DialogResult.OK) {
        try {
          Enabled = false;
          Content.LoadDistanceMatrix(openFileDialog.FileName);
        } catch (Exception x) {
          PluginInfrastructure.ErrorHandling.ShowErrorDialog(this, x);
        } finally {
          Enabled = true;
        }
      }
    }

    private void importNeighborsButton_Click(object sender, EventArgs e) {
      openFileDialog.Filter = "Comma Separated Value|*.csv|All Files|*.*";
      if (openFileDialog.ShowDialog() == DialogResult.OK) {
        try {
          Enabled = false;
          Content.LoadNeighbors(openFileDialog.FileName);
        } catch (Exception x) {
          PluginInfrastructure.ErrorHandling.ShowErrorDialog(this, x);
        } finally {
          Enabled = true;
        }
      }
    }

    private void checkButton_Click(object sender, EventArgs e) {
      var warnings = Content.CheckGeoData();
      if (!string.IsNullOrEmpty(warnings))
        MessageBox.Show(warnings, "Warnings", MessageBoxButtons.OK);
    }

    private void importConversionsButton_Click(object sender, EventArgs e) {
      openFileDialog.Filter = "YAML Files|*.yaml|All Files|*.*";
      if (openFileDialog.ShowDialog() == DialogResult.OK) {
        try {
          Enabled = false;
          Content.LoadDescriptors(openFileDialog.FileName);
        } catch (Exception x) {
          PluginInfrastructure.ErrorHandling.ShowErrorDialog(this, x);
        } finally {
          Enabled = true;
        }
      }

    }

    private void splitRegionFactorsImportButton_Click(object sender, EventArgs e) {
      openFileDialog.Filter = "CSV Files|*.csv|All Files|*.*";
      if (openFileDialog.ShowDialog() == DialogResult.OK) {
        try {
          Enabled = false;
          Content.LoadSplitRegionDistanceFactors(openFileDialog.FileName);
        } catch (Exception x) {
          PluginInfrastructure.ErrorHandling.ShowErrorDialog(this, x);
        } finally {
          Enabled = true;
        }
      }
    }

    private void filterButton_Click(object sender, EventArgs e) {
      if (filterDialog.ShowDialog() == DialogResult.OK) {
        if (filterDialog.Keep) {
          Content.KeepRegions(filterDialog.Regex);
        } else {
          Content.RemoveRegions(filterDialog.Regex);
        }
      }
    }

    #endregion

  }
}