using System;
using System.Collections.Generic;
using System.Text;

namespace OpenTraffic.Model.Simulator.Queue
{
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1711:IdentifiersShouldNotHaveIncorrectSuffix")]
    public class TurnQueue
    {
        LinkedList<KeyValuePair<float, Vehicle>> queue;
        Turning turn;
        Shockwave shockwave;
        public TurnQueue(Turning turn)
        {
            queue = new LinkedList<KeyValuePair<float,Vehicle>>();
            shockwave = new Shockwave();
            this.turn = turn;
        }

        public int Count
        {
            get
            {
                return queue.Count;
            }

        }

        public void Clear()
        {
            queue.Clear();
            shockwave.Clear();
        }

        public void AddVehicle(float time, Vehicle v)
        {

            queue.AddLast(new KeyValuePair<float,Vehicle>(time,v));
        }

        public void RemoveNext(out float time, out Vehicle v)
        {
            v = queue.First.Value.Value;
            time = queue.First.Value.Key;
            queue.RemoveFirst();
        }


        public Vehicle First
        {
            get { return queue.First.Value.Value; }
        }

        public void TryToStartShockwave(float time, float pos)
        {
            if (!shockwave.Active || !shockwave.HasPassed(time, pos))
            {
                shockwave.start(time, pos, turn.Origin.Simulator as Link, turn.Destination.Simulator as Link);
            };
        }
        public bool HasWaitingVehicles(float stopTime, int maxVehicleIndex)
        {
            if (turn.Block) return false;

            if (queue.Count == 0) return false; // No cars. Should never happend

            if (turn.Destination.Simulator.IsFull()) return false;


            if (queue.First.Value.Key > stopTime) return false; // First car not arrvied


            float time = queue.First.Value.Key;
            if (time > stopTime) return false;

            if (queue.First.Value.Value.LinkPos > (maxVehicleIndex)) return false;
            if (!shockwave.HasPassed(stopTime, 5.6f * queue.First.Value.Value.LinkPos)) return false;
            return true;
        }
    }
}