using System.Collections.Concurrent;
using System.Diagnostics;
using System.Reflection;

namespace WCS.Core
{
    public abstract class SystemBase : DescriptionClass
    {
        public World World { get; private set; }

        public SystemBase()
        {
            var attr = this.GetType().GetCustomAttribute<BelongToAttribute>();
            if (attr == null) return;
            var wt = attr.WorldType;
            World = World.Worlds.First(v => v.GetType() == wt);
        }

        public abstract List<object> GetObjects();

        public abstract void Update(List<WorkTimes> list);
    }

    public abstract class SystemBase<T> : SystemBase
    {
        public List<T> Objects { get; set; }

        /// <summary>
        /// 对所有Objects并行循环执行Do
        /// </summary>
        protected abstract bool ParallelDo { get; } 

        public SystemBase()
        {
            Objects = Create();//.Select(v=>Activator.CreateInstance(typeof(T),v)).OfType<T>().ToList();
        }

        public override void Update(List<WorkTimes> list)
        {
            if (ParallelDo)
            {
                Parallel.ForEach(Objects, new ParallelOptions { MaxDegreeOfParallelism = 256 }, obj =>
                {
                    var sw = new Stopwatch();
                    sw.Start();
                    InvokeDo(obj);
                    sw.Stop();
                    list.AddSafe(new WorkTimes { Key = $"{obj?.ToString()}", Total = sw.ElapsedMilliseconds });
                });
            }
            else
            {
                foreach (var obj in Objects)
                {
                    var sw = new Stopwatch();
                    sw.Start();
                    InvokeDo(obj);
                    sw.Stop();
                    list.AddSafe(new WorkTimes { Key = $"{obj?.ToString()}", Total = sw.ElapsedMilliseconds });
                }
            }
        }

        private void InvokeDo(T obj)
        {
            var channel = new Channel
            {
                World = World.Description,
                Stage = "DoLogics",
                System = Description,
                Item = obj.ToString()
            };
            try
            {
                if (channel.Item == "1")
                {
                    var a = 1;
                }
                Ltc.SetChannel(channel);
                World.OnInternalLog(channel, "开始");
                Do(obj);
            }
            catch (Exception ex)
            {
                World.OnError(channel, ex);
            }
            finally
            {
                World.OnInternalLog(channel, "结束");
                World.Publish();
            }
        }

        public abstract List<T> Create();

        public abstract void Do(T obj);

        public override List<object> GetObjects()
        {
            return Objects.OfType<object>().ToList();
        }
    }

    public abstract class DeviceSystem<T> : SystemBase<T> where T : EntityEx<Device>
    {
        public override List<T> Create()
        {
            var t = typeof(T);
            while (true)
            {
                if (t.IsGenericType) break;
                t = t.BaseType;
            }
            if (t == typeof(EntityEx<Device>))
            {
                var list = Device.All
                   .Where(Select)
                   .Select(v => Activator.CreateInstance(typeof(T), v)).OfType<T>().ToList();//此时才实例化Protocol 
                return list;
            }
            else
            {
                var types = t.GetGenericArguments();
                var list = Device.All.Where(v => types.All(v.HasProtocol))
                    .Where(Select)
                    .Select(v => Activator.CreateInstance(typeof(T), v, World)).OfType<T>().ToList();//此时才实例化Protocol
                if (list.Count == 0)
                {
                    //throw new Exception($"{this.GetType().Name}未匹配到任何Device");
                }
                return list;
            }
        }

        /// <summary>
        /// 筛选出需要实例化Protocol的Device
        /// </summary>
        /// <param name="dev"></param>
        /// <returns></returns>
        public abstract bool Select(Device dev);

        //public abstract List<Device> CreateDevices();
    }

    public abstract class ServiceSystem<T, TR> : SystemBase
    {
        private ConcurrentQueue<Action<List<WorkTimes>>> Actions = new ConcurrentQueue<Action<List<WorkTimes>>>();

        public TR Invoke(T obj)
        {
            var flag = false;
            TR result = default(TR);
            Actions.Enqueue(list =>
            {
                var sw = new Stopwatch();
                sw.Start();
                try
                {
                    result = InvokeDo(obj);
                }
                finally
                {
                    sw.Stop();
                    list.AddSafe(new WorkTimes { Key = $"{obj?.ToString()}", Total = sw.ElapsedMilliseconds });
                    flag = true;
                }
            });
            SpinWait.SpinUntil(() => flag);
            return result;
        }

        protected abstract TR Do(T obj);

        public override List<object> GetObjects()
        {
            return new List<object>();
        }

        public override void Update(List<WorkTimes> list)
        {
            while (Actions.TryDequeue(out var act))
            {
                act(list);
            }
        }

        private TR InvokeDo(T obj)
        {
            var channel = new Channel
            {
                World = World.Description,
                Stage = "DoLogics",
                System = Description,
                Item = obj.ToString()
            };
            try
            {
                Ltc.SetChannel(channel);
                World.OnInternalLog(channel, "开始");
                return Do(obj);
            }
            catch (Exception ex)
            {
                throw;
            }
            finally
            {
                World.OnInternalLog(channel, "结束");
                World.Publish();
            }
        }
    }

    public abstract class ServiceSystem<T> : SystemBase
    {
        private ConcurrentQueue<Action<List<WorkTimes>>> Actions = new ConcurrentQueue<Action<List<WorkTimes>>>();

        public void Invoke(T obj)
        {
            Actions.Enqueue(list =>
            {
                var sw = new Stopwatch();
                sw.Start();
                try
                {
                    InvokeDo(obj);
                }
                finally
                {
                    sw.Stop();
                    list.AddSafe(new WorkTimes { Key = $"{obj?.ToString()}", Total = sw.ElapsedMilliseconds });
                }
            });
        }

        protected abstract void Do(T obj);

        private void InvokeDo(T obj)
        {
            var channel = new Channel
            {
                World = World.Description,
                Stage = "DoLogics",
                System = Description,
                Item = obj.ToString()
            };
            try
            {
                Ltc.SetChannel(channel);
                World.OnInternalLog(channel, "开始");
                Do(obj);
            }
            catch (Exception ex)
            {
                throw;
            }
            finally
            {
                World.OnInternalLog(channel, "结束");
                World.Publish();
            }
        }

        public override List<object> GetObjects()
        {
            return new List<object>();
        }

        public override void Update(List<WorkTimes> list)
        {
            while (Actions.TryDequeue(out var act))
            {
                act(list);
            }
        }
    }
}