using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using HeuristicLab.MainForm;
using HeuristicLab.Problems.VehicleRouting.ProblemInstances;
using HeuristicLab.Data;

namespace HeuristicLab.Problems.VehicleRouting.Views {
  [View("SingleDepotVRPProblemInstance View")]
  [Content(typeof(SingleDepotVRPProblemInstance), true)]
  public partial class SingleDepotVRPView : VRPProblemInstanceView {
    public new SingleDepotVRPProblemInstance Content {
      get { return (SingleDepotVRPProblemInstance)base.Content; }
      set { base.Content = value; }
    }

    public SingleDepotVRPView() {
      InitializeComponent();
    }

    protected override void DrawVisualization(Bitmap bitmap) {
      DoubleMatrix coordinates = Content.Coordinates;
      DoubleMatrix distanceMatrix = Content.DistanceMatrix;
      BoolValue useDistanceMatrix = Content.UseDistanceMatrix;

      Pen[] pens = {new Pen(Color.FromArgb(92,20,237)), new Pen(Color.FromArgb(237,183,20)), new Pen(Color.FromArgb(237,20,219)), new Pen(Color.FromArgb(20,237,76)),
                    new Pen(Color.FromArgb(237,61,20)), new Pen(Color.FromArgb(115,78,26)), new Pen(Color.FromArgb(20,237,229)), new Pen(Color.FromArgb(39,101,19)),
                    new Pen(Color.FromArgb(230,170,229)), new Pen(Color.FromArgb(142,136,89)), new Pen(Color.FromArgb(157,217,166)), new Pen(Color.FromArgb(31,19,101)),
                    new Pen(Color.FromArgb(173,237,20)), new Pen(Color.FromArgb(230,231,161)), new Pen(Color.FromArgb(142,89,89)), new Pen(Color.FromArgb(93,89,142)),
                    new Pen(Color.FromArgb(146,203,217)), new Pen(Color.FromArgb(101,19,75)), new Pen(Color.FromArgb(198,20,237)), new Pen(Color.FromArgb(185,185,185)),
                    new Pen(Color.FromArgb(179,32,32)), new Pen(Color.FromArgb(18,119,115)), new Pen(Color.FromArgb(104,158,239)), new Pen(Color.Black)};


      if ((coordinates != null) && (coordinates.Rows > 0) && (coordinates.Columns == 2)) {
        double xMin = double.MaxValue, yMin = double.MaxValue, xMax = double.MinValue, yMax = double.MinValue;
        for (int i = 0; i < coordinates.Rows; i++) {
          if (xMin > coordinates[i, 0]) xMin = coordinates[i, 0];
          if (yMin > coordinates[i, 1]) yMin = coordinates[i, 1];
          if (xMax < coordinates[i, 0]) xMax = coordinates[i, 0];
          if (yMax < coordinates[i, 1]) yMax = coordinates[i, 1];
        }

        int border = 20;
        double xStep = xMax != xMin ? (bitmap.Width - 2 * border) / (xMax - xMin) : 1;
        double yStep = yMax != yMin ? (bitmap.Height - 2 * border) / (yMax - yMin) : 1;

        using (Graphics graphics = Graphics.FromImage(bitmap)) {
          if (Solution != null) {
            int currentTour = 0;
            foreach (Tour tour in Solution.GetTours()) {
              Point[] tourPoints = new Point[tour.Stops.Count + 2];
              Brush[] customerBrushes = new Brush[tour.Stops.Count];
              int lastCustomer = 0;

              for (int i = -1; i <= tour.Stops.Count; i++) {
                int location = 0;

                if (i == -1 || i == tour.Stops.Count)
                  location = 0; //depot
                else
                  location = tour.Stops[i];

                Point locationPoint = new Point(border + ((int)((coordinates[location, 0] - xMin) * xStep)),
                                bitmap.Height - (border + ((int)((coordinates[location, 1] - yMin) * yStep))));
                tourPoints[i + 1] = locationPoint;

                if (i != -1 && i != tour.Stops.Count) {
                  Brush customerBrush = Brushes.Black;
                  customerBrushes[i] = customerBrush;
                }
                lastCustomer = location;
              }

              graphics.DrawPolygon(pens[((currentTour >= pens.Length) ? (pens.Length - 1) : (currentTour))], tourPoints);

              for (int i = 0; i < tour.Stops.Count; i++) {
                graphics.FillRectangle(customerBrushes[i], tourPoints[i + 1].X - 3, tourPoints[i + 1].Y - 3, 6, 6);
              }

              graphics.FillEllipse(Brushes.Blue, tourPoints[0].X - 5, tourPoints[0].Y - 5, 10, 10);

              currentTour++;
            }
          } else {
            Point locationPoint;
            //just draw customers
            for (int i = 1; i < coordinates.Rows; i++) {
              locationPoint = new Point(border + ((int)((coordinates[i, 0] - xMin) * xStep)),
                              bitmap.Height - (border + ((int)((coordinates[i, 1] - yMin) * yStep))));

              graphics.FillRectangle(Brushes.Black, locationPoint.X - 3, locationPoint.Y - 3, 6, 6);
            }

            locationPoint = new Point(border + ((int)((coordinates[0, 0] - xMin) * xStep)),
                              bitmap.Height - (border + ((int)((coordinates[0, 1] - yMin) * yStep))));
            graphics.FillEllipse(Brushes.Blue, locationPoint.X - 5, locationPoint.Y - 5, 10, 10);
          }
        }
      }

      for (int i = 0; i < pens.Length; i++)
        pens[i].Dispose();
    }
  }
}