/*
 * 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.
 */

namespace OpenTraffic.Model.StopCriteria
{
    using System;
    using System.Collections.Generic;
    using System.Text;
    using System.Xml.Serialization;
    using OpenTraffic.Model.Result;

    public class AverageAbsoluteDifference : AbstractStopCriteria
    {
        [XmlAttribute(AttributeName = "MaxValue")]
        public float MaxValue { get; set; }

        [XmlAttribute(AttributeName = "persistence")]
        public int persistence { get; set; }

        [XmlAttribute(AttributeName = "nOk")]
        public int nOk { get; set; }

        private AbstractStopCriteria.StopCriteriaFunction func;

        public AverageAbsoluteDifference(AbstractStopCriteria.StopCriteriaFunction func)
        {
            this.func = func;
        }

        public AverageAbsoluteDifference()
        {
            func = this.GetTravelTime;
            nOk = 3;
        }

        public AverageAbsoluteDifference(float maxValue, int persistence)
        {
            func = this.MeanFlowIn;
            nOk = persistence;
            this.persistence = persistence;
            this.MaxValue = maxValue;
        }

        public override bool CheckCriteria(ResultData newFrame, ResultData oldFrame, TrafficModel m)
        {
            float value = Compare(newFrame, oldFrame, m);

            Console.WriteLine("AAD(" + MaxValue + "): " + value);
            if (value > Math.Abs(MaxValue))
            {
                nOk = persistence;
                return false;
            }
            else
            {
                nOk--;
                if (nOk < 0) return true;
                return false;
            }
        }

        public override float Compare(ResultData newFrame, ResultData oldFrame, TrafficModel m)
        {
            float value = 0;
            if (m != null)
            {
                if (oldFrame != null)
                {
                    int nTest = 100;
                    for (float i = oldFrame.startTime;
                        i < oldFrame.stopTime;
                        i += (oldFrame.stopTime - oldFrame.startTime) / nTest)
                    {
                        foreach (TrafficModelLink l in m.TrafficModelLinks)
                        {
                            float v1 = func(newFrame, i, l);
                            float v2 = func(oldFrame, i, l);

                            value += Math.Abs(v1 - v2);

                        }
                    }

                    value = value / (nTest * m.TrafficModelLinks.Count);
                }
            }

            return value;
        }

        private float MeanFlowIn(ResultData oldFrame, float i, TrafficModelLink l)
        {
            return oldFrame.GetLinkResultFromTime(i, l).FlowIn;
        }

        private float GetTravelTime(ResultData oldFrame, float i, TrafficModelLink l)
        {
            float t1 = (oldFrame.GetTravelTime(i, l) == 0) ? l.CalculateFreeFlowTravelTime() : oldFrame.GetTravelTime(i, l);
            t1 += oldFrame.GetQueuingTime(i, l);
            return t1;
        }
    }
}