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

namespace BCMToolbox
{
    [Serializable]
    public abstract class StimulatorBase
    {
        protected Dictionary<string, object> __parameters = new Dictionary<string, object>();
        
        [NonSerialized]
        INetwork __bound = null;
        int __startTick = 0;
        public const string STIMULUS_LENGTH = "Stimulus Length";
        public const string STIMULUS_START = "Stimulus Start";
        public const string STIMULUS_NULL = "null";
        
        public abstract string[] GetParameters();
        protected abstract void Apply();
        protected INetwork Bound
        {
            get
            {
                return __bound;
            }
        }

        protected int ElapsedTicks
        {
            get
            {
                return __bound.Ticks - __startTick;
            }
        }

        public static double GetDouble(object o)
        {
            if (o is int)
                return (double)(int)o;
            else if (o is double)
                return (double)o;
            return double.NaN;
        }

        public virtual void SetParameters(Dictionary<string, object> toSet)
        {
            List<string> paramNames = new List<string>(GetParameters());
            foreach (KeyValuePair<string, object> kvp in toSet)
                if (paramNames.Contains(kvp.Key))
                    __parameters[kvp.Key] = kvp.Value;
        }

        public bool IsBound
        {
            get
            {
                return __bound != null;
            }
        }

        public void BindToNetwork(INetwork net)
        {
            if (__bound != null)
                throw new ArgumentException("Stimulus already bound to a network.");

            List<string> paramNames = new List<string>(GetParameters());
            foreach (string paramName in paramNames)
                if (!__parameters.ContainsKey(paramName))
                    throw new ArgumentException("Parameter not set: " + paramName);

            __bound = net;
            __bound.TickProgress += new EventHandler(__bound_TickProgress);
            __bound_TickProgress(this, EventArgs.Empty);
        }

        public void Unbind()
        {
            if (__bound == null)
                throw new NotSupportedException("This stimulus was not bound.");
            __bound.TickProgress -= new EventHandler(__bound_TickProgress);
            __bound = null;
            __startTick = 0;
        }

        protected virtual void __bound_TickProgress(object sender, EventArgs e)
        {
            if (!IsBound)
                return;
            if (__parameters.ContainsKey(STIMULUS_START))
            {
                if (__parameters[STIMULUS_START] != null)
                {
                    object start = __parameters[STIMULUS_START].ToString();
                    if (start is int)
                        if (__bound.Ticks < (int)start) // not started yet
                            return;
                }
            }

            if (__startTick == 0)
                __startTick = __bound.Ticks;

            Apply();
            if (__parameters.ContainsKey(STIMULUS_LENGTH))
                if(__parameters[STIMULUS_LENGTH] != null)
                    if(__parameters[STIMULUS_LENGTH] is int)
                        if (ElapsedTicks >= (int)__parameters[STIMULUS_LENGTH])
                            Unbind();
        }
    }
}