/*
 * Copyright (c) 2005-2006 Erik Tigerholm <eriktigerholm@gmail.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
using System;
using System.Collections.Generic;
using System.Text;
using System.Xml.Serialization;

namespace OpenTraffic.Model.Graph
{
    [Serializable]
    public class GraphEdge<TV> : IGraphEdge where TV : Vertex
    {
        [XmlElement(ElementName = "Name")]
        public string Name
        {
            get { return name; }
            set { name = value; }
        }

        [XmlElement(ElementName = "Description")]
        public string Description
        {
            get { return description; }
            set { description = value; }
        }

        [XmlIgnore]
        public TV Source { get; set; }

        [XmlIgnore]
        public TV Target { get; set; }

        [XmlIgnore]
        public Vertex SourceVertex
        {
            get { return Source; }
        }

        [XmlIgnore]
        public Vertex TargetVertex
        {
            get { return Target; }
        }

        [XmlIgnore]
        public int Id
        {
            get { return id; }
            set { id = value; }
        }

        public List<GraphCoordinate> Shape
        {
            get { return shape; }
            // set { shape = value; }
        }

        private List<GraphCoordinate> shape;

        private int id;

        private string name;

        private string description;

        public string DisplayString
        {
            get { return this.ToString(); }
        }

        public GraphEdge()
        {
        }

        public GraphEdge(int id, TV source, TV target, string name)
            : this(id, source, target, name, "")
        {
        }

        public GraphEdge(int id, TV source, TV target, string name, string description)
        {
            this.id = id;
            this.Source = source;
            this.Target = target;
            this.name = name;
            this.shape = new List<GraphCoordinate>();
            this.description = description;
        }

        public virtual void GenerateShape(int nvert)
        {
            GenerateShape(nvert, 15);
        }

        public void GenerateShape(int nvert, float r)
        {
            double dx = Target.X - Source.X;
            double dy = Target.Y - Source.Y;


            double d = Math.Sqrt(dx * dx + dy * dy);

            shape.Clear();
            for (int i = 0; i < nvert; i++)
            {
                float s = (i + 1) / (float)(nvert + 1);
                shape.Add(new GraphCoordinate((float)(Source.X + dx * s - r * Math.Sin(s * Math.PI) * dy / d),
                                    (float)(Source.Y + dy * s + r * Math.Sin(s * Math.PI) * dx / d)));
            }
        }
    }
}