using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using Aop.Api.Domain;
using JNPF;
using JNPF.Common.Core.Manager;
using JNPF.Common.Dtos.Message;
using JNPF.Common.Extension;
using JNPF.Common.Security;
using JNPF.EventBus;
using JNPF.EventHandler;
using JNPF.FriendlyException;
using JNPF.Logging;
using JNPF.Message.Interfaces.Message;
using JNPF.Systems.Entitys.System;
using Mapster;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Options;
using Natasha.CSharp;
using Tnb.Common.Extension;
using Tnb.WarehouseMgr.Entities.Attributes;
using Tnb.WarehouseMgr.Entities.Dto.Inputs;
using Tnb.WarehouseMgr.Entities.Enums;
using Tnb.WarehouseMgr.Entities.Exceptions;
using Tnb.WarehouseMgr.Interfaces;

namespace Tnb.WarehouseMgr
{
    /// <summary>
    /// 定时任务
    /// added by ly on 20230802
    /// </summary>
    public class TimedTaskBackgroundService : BackgroundService
    {
        private IEventPublisher _eventPublisher = default!;
        private readonly IServiceProvider _serviceProvider;
        private static Dictionary<string, Func<CancellationTokenSource?, Task>> _timedFuncMap = new(StringComparer.OrdinalIgnoreCase);
        static TimedTaskBackgroundService()
        {
            Task.Run(() =>
            {
                _timedFuncMap = App.EffectiveTypes.AsParallel().Where(t => !t.Namespace.IsNullOrWhiteSpace() && t.Namespace.Contains("Tnb.WarehouseMgr")).SelectMany(t => t.GetMethods())
                                       .Where(m => m.GetCustomAttribute<TimedAttribute>() != null)
                                       .ToDictionary(x => x.Name, x =>
                                       (Func<CancellationTokenSource?, Task>)Delegate.CreateDelegate(typeof(Func<CancellationTokenSource?, Task>), App.GetService(x.DeclaringType), x));
            });
        }
        public TimedTaskBackgroundService(IServiceProvider serviceProvider)
        {
            _serviceProvider = serviceProvider;
        }

        protected override Task ExecuteAsync(CancellationToken stoppingToken)
        {
            var queueTask = Task.Run(async () =>
             {

                 var channelReader = _serviceProvider.GetRequiredService<ITaskMessageNotify>().Reader;

                 CancellationTokenSource? cts = new();

                 while (channelReader != null && await channelReader.WaitToReadAsync())
                 {
                     while (channelReader.TryRead(out var message))
                     {
                         if (_timedFuncMap.ContainsKey(message.TaskName))
                         {
                             await _timedFuncMap[message.TaskName].Invoke(cts);
                         }
                     }
                 }
             }, stoppingToken);

            var timedTask = Task.Run(() =>
             {
                 _eventPublisher = App.GetRequiredService<IEventPublisher>();
                 ////生成任务执行
                 //CancellationTokenSource genTaskCTS = new();
                 CancellationTokenSource kittingOutAddCts = new();
                 CancellationTokenSource kittingOutShippedCts = new();
                 CancellationTokenSource setSortingCts = new();
                 CancellationTokenSource isMinStorageCts = new();
                 //var wareHouseService = App.GetRequiredService<IWareHouseService>();
                 //TimedTask(cts => wareHouseService.GenTaskExecute(cts), genTaskCTS);
                 //齐套出库
                 var kittingOutService = App.GetRequiredService<IWmskittingOutService>();
                 TimedTask(cts => kittingOutService.KittingOutByAdd(cts), kittingOutAddCts, 1);
                 TimedTask(cts => kittingOutService.KittingOutByIsToBeShipped(cts), kittingOutShippedCts, 1);
                 //齐套分拣
                 var setSortingService = App.GetRequiredService<IWmsSetSortingService>();
                 TimedTask(cts => setSortingService.PackSortingByAdd(cts), setSortingCts, 1);
                 //最低库存检查
                 var transferSignService = App.GetRequiredService<IWmsPDATransferSignService>();
                 TimedTask(cts => transferSignService.IsMinStorage(cts), isMinStorageCts, 30, TimeSpanUnit.Minutes);

             }, stoppingToken);

            return Task.WhenAll(queueTask, timedTask);
        }



        private Task TimedTask(Func<CancellationTokenSource, Task> action, CancellationTokenSource cts, int interval, TimeSpanUnit timeType = TimeSpanUnit.Seconds)
        {
            var token = cts.Token;
            return Task.Factory.StartNew(async () =>
            {
                while (!token.IsCancellationRequested)
                {
                    await action(cts).Catch(async ex =>
                    {
                        if (ex is TimedTaskException timedTaskEx and not null)
                        {
                            await _eventPublisher.PublishAsync(new LogEventSource("Log:CreateExLog", timedTaskEx.options!, new SysLogEntity
                            {
                                Id = SnowflakeIdHelper.NextId(),
                                Category = 4,
                                UserId = timedTaskEx.UserId,
                                UserName = timedTaskEx.UserName,
                                IPAddress = NetHelper.Ip,
                                RequestURL = timedTaskEx.RequestURL,
                                RequestMethod = timedTaskEx.RequestMethod,
                                Json = timedTaskEx + "\n" + timedTaskEx.InnerException?.StackTrace + "\n" + timedTaskEx?.TargetSite?.GetParameters().ToString(),
                                //PlatForm = string.Format("{0}-{1}", userAgent.OS.ToString(), userAgent.RawValue),
                                CreatorTime = DateTime.Now
                            }));
                        }
                    });
                    await TaskDelay(timeType, interval);
                }
            }, cts.Token, TaskCreationOptions.None, new CustomerTaskScheduler());

            #region ThreadPool 线程运行会导致线程饥饿
            //return Task.Run(async () =>
            //{
            //    while (!token.IsCancellationRequested)
            //    {

            //        await action(cts).Catch(async ex =>
            //        {
            //            if (ex is TimedTaskException timedTaskEx and not null)
            //            {
            //                await _eventPublisher.PublishAsync(new LogEventSource("Log:CreateExLog", timedTaskEx.options!, new SysLogEntity
            //                {
            //                    Id = SnowflakeIdHelper.NextId(),
            //                    Category = 4,
            //                    UserId = timedTaskEx.UserId,
            //                    UserName = timedTaskEx.UserName,
            //                    IPAddress = NetHelper.Ip,
            //                    RequestURL = timedTaskEx.RequestURL,
            //                    RequestMethod = timedTaskEx.RequestMethod,
            //                    Json = timedTaskEx + "\n" + timedTaskEx.InnerException?.StackTrace + "\n" + timedTaskEx?.TargetSite?.GetParameters().ToString(),
            //                    //PlatForm = string.Format("{0}-{1}", userAgent.OS.ToString(), userAgent.RawValue),
            //                    CreatorTime = DateTime.Now
            //                }));
            //            }
            //        });
            //        await TaskDelay(timeType, interval);
            //    }
            //}, token); 
            #endregion
        }

        private Task TaskDelay(TimeSpanUnit timeType, int interval)
        {
            Task delayTask = timeType switch
            {
                TimeSpanUnit.Milliseconds => Task.Delay(TimeSpan.FromMilliseconds(interval)),
                TimeSpanUnit.Seconds => Task.Delay(TimeSpan.FromSeconds(interval)),
                TimeSpanUnit.Minutes => Task.Delay(TimeSpan.FromMinutes(interval)),
                TimeSpanUnit.Hours => Task.Delay(TimeSpan.FromHours(interval)),
                TimeSpanUnit.Days => Task.Delay(TimeSpan.FromDays(interval)),
                _ => throw new NotImplementedException()
            };
            return delayTask;
        }

    }
    /// <summary>
    /// 自定义任务调度器，保证长任务在单独的线程中运行
    /// </summary>
    internal class CustomerTaskScheduler : TaskScheduler
    {
        // 这边的 BlockingCollection 只是举个例子，如果是普通的队列，配合锁也是可以的。
        private readonly BlockingCollection<Task> _tasks = new BlockingCollection<Task>();

        public CustomerTaskScheduler()
        {
            var thread = new Thread(() =>
            {
                foreach (var task in _tasks.GetConsumingEnumerable())
                {
                    TryExecuteTask(task);
                }
            })
            {
                IsBackground = true
            };
            thread.Start();
        }

        protected override IEnumerable<Task> GetScheduledTasks()
        {
            return _tasks;
        }

        protected override void QueueTask(Task task)
        {
            _tasks.Add(task);
        }

        protected override bool TryExecuteTaskInline(Task task, bool taskWasPreviouslyQueued)
        {
            return false;
        }
    }

}