using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
using System.Threading;

namespace IvyBus
{
    /* This is the Application side of binding storage */
    /* association of a generated Key and a delegate and the expression */
    /* this is SEND to other client */

    public class IvyApplicationBinding 
    {
        private BindingType binding;

        public BindingType Binding
        {
            get { return binding; }
            set { binding = value; }
        }
        private ushort key;

 
        public ushort Key
        {
            get { return key; }
            set { key = value; }
        }

        private object[] args;

        public object[] Args
        {
            get { return args; }
            set { args = value; }
        }
        private string expression;

        public string Expression
        {
            get { return expression; }
            set { expression = value; }
        }
        private string formated_expression;
        public string FormatedExpression
        {
            get
            { 
                FormatExpression();
                return formated_expression; 
            }
        }

        private List<string> arguments;
        ///<summary>SentMessageClasses the first word token of sent messages
        ///<remarks> optimise the parsing process when sending messages </remarks>
        ///</summary>

        public List<string> Arguments
        {
            get
            {
                return arguments;
            }
        }

        public event EventHandler<IvyMessageEventArgs> Callback;
 
        public IvyApplicationBinding()
        {
            arguments = new List<string>();
        }
        
        // translate part of expression to object property
        public void FormatExpression()
        {
            //// Safely :
#if (!PocketPC)//TODO Pocket PC doesn't have Target Member
            EventHandler<IvyMessageEventArgs> temp = Callback;
            if (temp != null)
            {
                //TODO Pocket PC doesn't have Target Member
                object target = temp.Target;
               if (args == null)
                {
                    args = new object[arguments.Count];
                    for (int i = 0; i < arguments.Count; i++)
                    {
                        System.Reflection.PropertyInfo prop = target.GetType().GetProperty(arguments[i]);
                        if (prop != null)
                            args[i] = prop.GetValue(target, null);
                        else //TODO what else BUG msgbox in desing mode !!!
                            args[i] = arguments[i];
                    }
                }
                formated_expression = string.Format(expression, args);
            }
            else //TODO Abnormal condition  Design Time 
#endif
            formated_expression = expression;
            
        }

#if ( PocketPC )
        internal void Firevent(System.Windows.Forms.Control control, IvyMessageEventArgs e)
        {
            //// Safely invoke an event:
            EventHandler<IvyMessageEventArgs> temp = Callback;

            if (temp == null)
            {
                throw new IvyException("(callCallback) Not callback for id " + e.Id);
            }
            if (control != null)
            {
                control.Invoke(temp, this, e);
            }
            else
                temp(this, e);
        }
#else
        internal void Firevent(System.Threading.SynchronizationContext syncContext, IvyMessageEventArgs e)
        {
            //// Safely invoke an event:
            EventHandler<IvyMessageEventArgs> temp = Callback;

            if (temp == null)
            {
                throw new IvyException("(callCallback) Not callback for id " + e.Id);
            }
            if (syncContext != null)
            {
                SendOrPostCallback update = delegate(object state)
                              {
                                  IvyMessageEventArgs args = (IvyMessageEventArgs)state;
                                  temp(this, args);
                              };
                syncContext.Post(update, e);
            }
            else
                temp(this, e);
        }

#endif
    }
  
}