using System;
using System.Collections.Generic;
using System.Diagnostics;

namespace Aitex.Core.RT.IOCore
{
    public delegate  void  SetValue<T>(int index, T Value);
    public delegate  T GetValue<T>(int index);

    public enum IOType
    {
        DI,
        DO,
        AI,
        AO,  
    }

    public class IOAccessor<T>
    {
        protected string name;
        protected string addr;

        protected int index;
        protected T[] values;

        protected SetValue<T> setter = null;
        protected GetValue<T> getter = null;

        public T Value
        {
            get
            {
                return getter(index);
            }
            set
            {
                setter(index, value);
            }
        }

        public T[] Buffer
        {
            get
            {
                return values;
            }
        }

        public string Name
        {
            get { return name; }
        }

        public int Index
        {
            get { return index; }
        }

        public int BlockOffset
        {
            get;
            set;
        }

        public string Addr
        {
            get { return addr; }
            set { addr = value; }
        }

        public string Provider
        {
            get;
            set;
        }


        public string Description
        {
            get;
            set;
        }

        public string StringIndex
        {
            get
            {
                return name.Substring(0, 2) + "-" + index.ToString();
            }
        }

        public int IoTableIndex { get; set; }

        public IOAccessor(string name, int index, T[] values) 
        {
            this.name   = name;
            this.index  = index;
            this.values = values;

            getter = GetValue;
            setter = SetValue;
        }

        private T GetValue(int index)
        {
            Debug.Assert(values!= null && index >= 0 && index < values.Length);
            return values[index];
        }


        private void SetValue(int index, T value)
        {
            Debug.Assert(values != null && index >= 0 && index < values.Length);
            values[index] = value;
        }
    }

    public class DIAccessor : IOAccessor<bool>
    {
        private IOAccessor<bool> rawAccessor;

        public bool RawData
        {
            get 
            {
                return rawAccessor.Value ;
            }
            set
            {
                rawAccessor.Value = value ;
            }
        }

        public DIAccessor(string name, int index, bool[] values, bool[] raws)
            :base(name, index, values)
        {
            rawAccessor = new IOAccessor<bool>(name, index, raws);
        }
    }

    public class DOAccessor : IOAccessor<bool>
    {
        public DOAccessor(string name, int index, bool[] values)
        :base(name,index, values)
        {
            setter = SetValueSafe;
        }
 

        public bool SetValue(bool value, out string reason)
        {
            if (IO.CanSetDO(name, value, out reason))
            {
                values[index] =  value ;    
                return true;
            }
            return false;
        }

        public bool Check(bool value, out string reason)
        {
            return IO.CanSetDO(name, value, out reason);
        }


        private void SetValueSafe(int index, bool value)
        {
            string reason;
            if (IO.CanSetDO(name, value , out reason))
            {
                values[index] = value;              
            }            
        }
    }

    public class AIAccessor : IOAccessor<short>
    {
        public AIAccessor(string name, int index, short[] values)
        :base(name,index, values)
        { 
        } 
    }

    public class AOAccessor : IOAccessor<short>
    {
        public AOAccessor(string name, int index, short[] values)
        :base(name,index, values)
        { 
        }
    }



    
}