#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2016 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.Linq;
using System.Windows.Forms;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.MainForm;
using HeuristicLab.Visualization;

namespace HeuristicLab.VariableInteractionNetworks.Views {
  public class DirectedGraphChartMode : SelectChartMode {
    public DirectedGraphChartMode(DirectedGraphChart control) : base(control) { }

    public DirectedGraphChart Control {
      get { return (DirectedGraphChart)chartControl; }
    }

    public override void HandleOnMouseDoubleClick(object sender, MouseEventArgs e) {
      try {
        switch (e.Button) {
          case MouseButtons.Left:
            try {
              chartControl.SuspendRendering();
              var worldLocation = chartControl.Chart.TransformPixelToWorld(e.Location);
              foreach (var p in chartControl.Chart.Group.SelectedPrimitives.Where(x => !x.ContainsPoint(worldLocation)))
                p.Selected = false;
              var sp = chartControl.Chart.GetPrimitive(e.Location);
              if (sp != null) sp.Selected = true;
              if (sp is RectangularPrimitiveBase) {
                var vertex = Control.GetVertex(sp) as IVertex<IDeepCloneable>;
                if (vertex != null) {
                  var content = vertex.Data as IContent;
                  if (content != null) {
                    MainFormManager.MainForm.ShowContent(content);
                  }
                }
              }
            }
            finally { chartControl.ResumeRendering(); }
            break;
        }
      }
      finally {
        base.HandleOnMouseDown(sender, e);
      }
    }

    public override void HandleOnMouseMove(object sender, MouseEventArgs e) {
      try {
        switch (e.Button) {
          case MouseButtons.Left:
            var previousWorldLocation = chartControl.Chart.TransformPixelToWorld(previousLocation);
            var worldLocation = chartControl.Chart.TransformPixelToWorld(e.Location);
            var offset = worldLocation - previousWorldLocation;
            try {
              chartControl.SuspendRendering();
              foreach (var p in chartControl.Chart.Group.SelectedPrimitives.Where(p => p.ContainsPoint(previousWorldLocation))) {
                var lp = p as LabeledPrimitive;
                if (lp == null) continue;
                p.Move(previousWorldLocation, offset);
                var rect = lp.Primitive as Rectangle;
                var ell = lp.Primitive as Ellipse;
                if (rect == null && ell == null) continue;
                var v = Control.GetVertex(p);
                if (v == null) continue;
                // ends of outgoing arcs need to be properly adjusted
                foreach (var arc in v.InArcs) {
                  var r = (LabeledPrimitive)Control.GetVertexShape(arc.Source);
                  var line = (Line)Control.GetArcShape(arc);
                  var tmp = new Line(this.chartControl.Chart, r.Primitive.Center(), lp.Primitive.Center());
                  var intersect = rect == null ? ell.ComputeIntersect(tmp) : rect.ComputeIntersect(tmp);
                  if (intersect.Any())
                    line.SetPosition(tmp.Start, intersect.First());
                }
                foreach (var arc in v.OutArcs) {
                  var r = (LabeledPrimitive)Control.GetVertexShape(arc.Target);
                  rect = r.Primitive as Rectangle;
                  ell = r.Primitive as Ellipse;
                  var line = (Line)Control.GetArcShape(arc);
                  var tmp = new Line(this.chartControl.Chart, lp.Primitive.Center(), r.Primitive.Center());
                  var intersect = rect == null ? ell.ComputeIntersect(tmp) : rect.ComputeIntersect(tmp);
                  if (intersect.Any())
                    line.SetPosition(tmp.Start, intersect.First());
                }
              }
            }
            finally { chartControl.ResumeRendering(); }
            break;
        }
      }
      finally {
        base.HandleOnMouseMove(sender, e);
      }
    }
  }
}