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

namespace EventBus
{
    public abstract class BaseValue
    {
        public BaseValue(Properties? properties = null)
        {
            this.Properties = properties ?? Properties.Default;
            this.IntPtr = Guid.NewGuid();
        }
        public DateTime DateTime => DateTime.Now;
        private Properties properties = Properties.Default;
        public Properties Properties { get => properties ?? Properties.Default; private set => properties = value; }
        public abstract bool HasDelegate { get; }
        public Guid IntPtr { get; internal set; }

    }
    public class ActionValue<TData> : BaseValue
    {
        public ActionValue(Action<object, EventArgs<TData>> action, Properties? properties = null) : base(properties)
        {
            this.Action = action;
        }
        public Action<object, EventArgs<TData>> Action { get;private set; }

        public override bool HasDelegate => Action != null;


        public bool Invoke(object sender, TData args, IBaseEventData eventData)
        {
            if (Action == null) return false;
            var eventargs = new EventArgs<TData>(args, IntPtr, eventData);
            Action.Invoke(sender, eventargs);
            return eventargs.Handle;
        }
    }
    public abstract class BaseFuncValue<TData, TResult> : BaseValue
    {
        public BaseFuncValue(Properties? properties = null) : base(properties)
        {

        }
        public abstract TResult Invoke(object sender, TData data, IBaseEventData eventData);
        public abstract List<TResult> InvokeList(object sender, TData data, IBaseEventData eventData);
        public abstract bool IsListFunc { get; }
    }
    public class FuncValue<TData, TRestlt> : BaseFuncValue<TData, TRestlt>
    {
        public FuncValue(Func<object, EventArgs<TData>, TRestlt> func, Properties? properties = null) : base(properties)
        {
            Func = func;
        }
        internal Func<object, EventArgs<TData>, TRestlt> Func { get; private set; }
        public override bool IsListFunc => false;

        public override bool HasDelegate => Func != null;

        public override TRestlt Invoke(object sender, TData data, IBaseEventData eventData)
        {
            ArgumentNullException.ThrowIfNull(Func);
            return Func.Invoke(sender, new EventArgs<TData>(data, IntPtr, eventData, typeof(TRestlt)));
        }

        public override List<TRestlt> InvokeList(object sender, TData data, IBaseEventData eventData)
        {
            throw new NotImplementedException();
        }
    }
    internal class ListFuncValue<TData, TRestlt> : BaseFuncValue<TData, TRestlt>
    {
        public ListFuncValue(Func<object, EventArgs<TData>, List<TRestlt>> func, Properties? properties = null) : base(properties)
        {
            Func = func;
        }

        public Func<object, EventArgs<TData>, List<TRestlt>> Func { get; private set; }
        public override bool IsListFunc => true;

        public override bool HasDelegate => Func != null;

        public override TRestlt Invoke(object sender, TData data, IBaseEventData eventData)
        {
            throw new NotImplementedException();
        }

        public override List<TRestlt> InvokeList(object sender, TData data, IBaseEventData eventData)
        {
            ArgumentNullException.ThrowIfNull(Func);
            return Func.Invoke(sender, new EventArgs<TData>(data, IntPtr, eventData, typeof(TRestlt)));
        }
    }
}