using Edge.Core.Parser;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Edge.Core.Processor
{
    public interface IDeviceHandler<TRaw, TMessage> where TMessage : MessageBase
    {
        /// <summary>
        /// The communicator has NOT started yet at this stage.
        /// </summary>
        /// <param name="context"></param>
        void Init(IContext<TRaw, TMessage> context);

        /// <summary>
        /// will be called every time that a message incoming from communicator.
        /// </summary>
        /// <param name="context"></param>
        Task Process(IContext<TRaw, TMessage> context);

        /// <summary>
        /// The method will be called from user for a generic test purpose, should implemented this method 
        /// to cover most real life time logic to give user a meaningful and confidence result for how this processor would work 
        /// when run for real.
        /// The method was guranteed to be called after DeviceHandler.Init, and Communicator.Start
        /// </summary>
        /// <param name="parameters"></param>
        /// <returns>throw exception to indicates the test failed, otherwise, return a Completed task.</returns>
        Task Test(params object[] parameters) { throw new NotImplementedException("暂不支持测试"); }
    }

    public abstract class TestableActivePollingDeviceHandler<TRaw, TMessage> : IDeviceHandler<TRaw, TMessage> where TMessage : MessageBase
    {
        private IContext<TRaw, TMessage> context;
        public virtual void Init(IContext<TRaw, TMessage> context)
        {
            this.context = context;
        }


        public virtual Task Process(IContext<TRaw, TMessage> context)
        {
            throw new NotImplementedException();
        }
    }
}