/*
 * 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.StopCriteria
{
    public class RootMeanSquare : AbstractStopCriteria
    {
        [XmlAttribute(AttributeName = "MaxValue")]
        public float MaxValue { get; set; }

        public RootMeanSquare()
        {
        }

        public RootMeanSquare(float maxValue)
        {
            this.MaxValue = maxValue;
        }

        public override bool CheckCriteria(Result.ResultData newFrame, Result.ResultData oldFrame, TrafficModel m)
        {
            float value = Compare(newFrame, oldFrame, m);
            Console.WriteLine("RMS(" + MaxValue + "): " + value);

            if (value > Math.Abs(MaxValue))
            {
                return false;
            }

            return true;
        }

        public override float Compare(Result.ResultData newFrame, Result.ResultData oldFrame, TrafficModel m)
        {
            float value = 0;

            if (newFrame != null && oldFrame != null && m != null)
            {
                int nTest = 10;
                for (float i = oldFrame.startTime;
                    i < oldFrame.stopTime;
                    i += (oldFrame.stopTime - oldFrame.startTime) / nTest)
                {
                    foreach (TrafficModelLink l in m.TrafficModelLinks)
                    {
                        float v = newFrame.GetTravelTime(i, l) -
                            oldFrame.GetTravelTime(i, l);
                        value += v * v;
                    }
                }

                value = (float)Math.Sqrt(value) / nTest / m.TrafficModelLinks.Count;
            }

            return value;
        }
    }
}