using CapMachine.Wpf.Services;
using Prism.Events;
using Prism.Mvvm;
using Stateless;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace CapMachine.Wpf.Models
{
    /// <summary>
    /// 设备的运行状态
    /// https://www.cnblogs.com/podolski/p/13215064.html
    /// </summary>
    public class MachineRunState : BindableBase
    {
        /// <summary>
        /// 实例化
        /// </summary>
        public MachineRunState(string name, IEventAggregator eventAggregator, ConfigService configService)
        {
            Name = name;
            EventAggregator = eventAggregator;
            ConfigService = configService;
            InitConfig();

        }

        private string _RunStateMsg="等待";
        /// <summary>
        /// 运行状态
        /// </summary>
        public string RunStateMsg
        {
            get { return _RunStateMsg; }
            set { _RunStateMsg = value; RaisePropertyChanged(); }
        }

        /// <summary>
        /// PLC程序是否下载
        /// </summary>
        public bool IsProLoad { get; set; }

        /// <summary>
        /// 状态机
        /// </summary>
        public StateMachine<RunState, RunStateTrig> StateMachine { get; set; }

        /// <summary>
        /// 初始化配置信息
        /// </summary>
        private void InitConfig()
        {
            //状态机初始化
            StateMachine = new StateMachine<RunState, RunStateTrig>(RunState.Wait);

            StateMachine.Configure(RunState.Wait)
                .OnEntry(t => WaitEntryCall())
                .OnExit(t => WaitExitCall())
                .PermitIf(RunStateTrig.AlarmTrig, RunState.Alarm, () => AlarmPreValid())
                .PermitIf(RunStateTrig.StartTrig, RunState.Run, () => RunPreValid())
                //.Permit(RunStateTrig.StartTrig, RunState.Run)
                //.Permit(RunStateTrig.ResetTrig, RunState.Wait)
                .PermitIf(RunStateTrig.EndTrig, RunState.Stop, () => StopPreValid())
                .PermitIf(RunStateTrig.PauseTrig, RunState.Pause, () => PausePreValid())
                .Ignore(RunStateTrig.ResetTrig)
                .Ignore(RunStateTrig.WaitTrig);

            StateMachine.Configure(RunState.Alarm)
                .OnEntry(t => AlarmEntryCall())
                .OnExit(t => AlarmExitCall())
                .PermitIf(RunStateTrig.WaitTrig, RunState.Wait, () => WaitPreValid())
                .PermitIf(RunStateTrig.ResetTrig, RunState.Wait, () => WaitPreValid())
                .PermitIf(RunStateTrig.StartTrig, RunState.Run, () => RunPreValid())
                .PermitIf(RunStateTrig.EndTrig, RunState.Stop, () => StopPreValid())
                .PermitIf(RunStateTrig.PauseTrig, RunState.Pause, () => PausePreValid())
                .Ignore(RunStateTrig.AlarmTrig);

            StateMachine.Configure(RunState.Run)
                .OnEntry(t => RunEntryCall())
                .OnExit(t => RunExitCall())
                .PermitIf(RunStateTrig.WaitTrig, RunState.Wait, () => WaitPreValid())
                .PermitIf(RunStateTrig.ResetTrig, RunState.Wait, () => WaitPreValid())
                .PermitIf(RunStateTrig.AlarmTrig, RunState.Alarm, () => AlarmPreValid())
                .PermitIf(RunStateTrig.EndTrig, RunState.Stop, () => StopPreValid())
                .PermitIf(RunStateTrig.PauseTrig, RunState.Pause, () => PausePreValid())
                .Ignore(RunStateTrig.StartTrig);

            StateMachine.Configure(RunState.Stop)
                .OnEntry(t => StopEntryCall())
                .OnExit(t => StopExitCall())
                .PermitIf(RunStateTrig.WaitTrig, RunState.Wait, () => WaitPreValid())
                .PermitIf(RunStateTrig.ResetTrig, RunState.Wait, () => WaitPreValid())
                .PermitIf(RunStateTrig.AlarmTrig, RunState.Alarm, () => AlarmPreValid())
                .PermitIf(RunStateTrig.StartTrig, RunState.Run, () => RunPreValid())
                .PermitIf(RunStateTrig.PauseTrig, RunState.Pause, () => PausePreValid())
                .Ignore(RunStateTrig.EndTrig);

            StateMachine.Configure(RunState.Pause)
                .OnEntry(t => PauseEntryCall())
                .OnExit(t => PauseExitCall())
                .PermitIf(RunStateTrig.WaitTrig, RunState.Wait, () => WaitPreValid())
                .PermitIf(RunStateTrig.ResetTrig, RunState.Wait, () => WaitPreValid())
                .PermitIf(RunStateTrig.AlarmTrig, RunState.Alarm, () => AlarmPreValid())
                .PermitIf(RunStateTrig.StartTrig, RunState.Run, () => RunPreValid())
                .PermitIf(RunStateTrig.EndTrig, RunState.Stop, () => StopPreValid())
                .Ignore(RunStateTrig.PauseTrig);

        }

        #region 验证状态

        /// <summary>
        /// 进入 Wait 状态
        /// </summary>
        /// <returns></returns>
        public bool FireWait()
        {
            var Result = StateMachine.CanFire(RunStateTrig.WaitTrig);
            if (Result)
            {
                StateMachine.Fire(RunStateTrig.WaitTrig);
                return true;
            }
            else
            {
                MessageBox.Show($"WaitTrig-没有满足条件");
                return false;
            }
        }

        /// <summary>
        /// 进入 Alarm状态
        /// </summary>
        /// <returns></returns>
        public bool FireAlarm()
        {
            var Result = StateMachine.CanFire(RunStateTrig.AlarmTrig);
            if (Result)
            {
                StateMachine.Fire(RunStateTrig.AlarmTrig);
                return true;
            }
            else
            {
                MessageBox.Show($"AlarmTrig-没有满足条件");
                return false;
            }
        }

        /// <summary>
        /// 进入 Reset状态
        /// </summary>
        /// <returns></returns>
        public bool FireReset()
        {
            var Result = StateMachine.CanFire(RunStateTrig.ResetTrig);
            if (Result)
            {
                StateMachine.Fire(RunStateTrig.ResetTrig);
                return true;
            }
            else
            {
                MessageBox.Show($"ResetTrig-没有满足条件");
                return false;
            }
        }

        /// <summary>
        /// 进入 Start 状态
        /// </summary>
        /// <returns></returns>
        public bool FireStart()
        {
            var Result = StateMachine.CanFire(RunStateTrig.StartTrig);
            if (Result)
            {
                StateMachine.Fire(RunStateTrig.StartTrig);
                return true;
            }
            else
            {
                MessageBox.Show($"StartTrig-没有满足条件");
                return false;
            }
        }

        /// <summary>
        /// 进入 End 状态
        /// </summary>
        /// <returns></returns>
        public bool FireEnd()
        {
            var Result = StateMachine.CanFire(RunStateTrig.EndTrig);
            if (Result)
            {
                StateMachine.Fire(RunStateTrig.EndTrig);
                return true;
            }
            else
            {
                MessageBox.Show($"EndTrig-没有满足条件");
                return false;
            }
        }

        /// <summary>
        /// 进入 Pause 状态
        /// </summary>
        /// <returns></returns>
        public bool FirePause()
        {
            var Result = StateMachine.CanFire(RunStateTrig.PauseTrig);
            if (Result)
            {
                StateMachine.Fire(RunStateTrig.PauseTrig);
                return true;
            }
            else
            {
                MessageBox.Show($"PauseTrig-没有满足条件");
                return false;
            }
        }







        /// <summary>
        /// 运行 状态的条件判断验证
        /// </summary>
        /// <returns></returns>
        /// <exception cref="NotImplementedException"></exception>
        private bool RunPreValid()
        {
            if (ConfigService.IsExpInfoOk && IsProLoad)
            {
                //程序下载并且，试验信息已经设置好后，就可以开始了
                return true;
            }

            return false;
        }

        /// <summary>
        ///进入 报警 状态的条件判断验证
        /// </summary>
        /// <returns></returns>
        /// <exception cref="NotImplementedException"></exception>
        private bool AlarmPreValid()
        {
            return true;
        }

        /// <summary>
        ///进入 等待 状态的条件判断验证
        /// </summary>
        /// <returns></returns>
        /// <exception cref="NotImplementedException"></exception>
        private bool WaitPreValid()
        {
            return true;
        }

        /// <summary>
        ///进入 停止 状态的条件判断验证
        /// </summary>
        /// <returns></returns>
        /// <exception cref="NotImplementedException"></exception>
        private bool StopPreValid()
        {
            //运行切换到停止
            if (StateMachine.State == RunState.Run)
            {
                return true;
            }
            return false;
        }

        /// <summary>
        ///进入 暂停 状态的条件判断验证
        /// </summary>
        /// <returns></returns>
        /// <exception cref="NotImplementedException"></exception>
        private bool PausePreValid()
        {
            //运行切换到停止
            if (StateMachine.State == RunState.Run)
            {
                return true;
            }
            return false;
        }

        #endregion


        #region 状态离开和进入方法

        private void PauseExitCall()
        {
            Console.WriteLine($"{Name}-PauseExitCall");
        }

        private void PauseEntryCall()
        {
            RunStateMsg = "暂停";
            Console.WriteLine($"{Name}-PauseEntryCall");
        }

        private void StopExitCall()
        {
            Console.WriteLine($"{Name}-StopExitCall");
        }

        private void StopEntryCall()
        {
            RunStateMsg = "停止";
            Console.WriteLine($"{Name}-StopEntryCall");
        }

        private void RunExitCall()
        {
            Console.WriteLine($"{Name}-RunExitCall");
        }

        private void RunEntryCall()
        {
            RunStateMsg = "运行";
            Console.WriteLine($"{Name}-RunEntryCall");
           
        }

        private void AlarmExitCall()
        {
            Console.WriteLine($"{Name}-AlarmExitCall");
        }

        private void AlarmEntryCall()
        {
            RunStateMsg = "报警";
            Console.WriteLine($"{Name}-AlarmEntryCall");
        }


        /// <summary>
        /// 离开 等待
        /// </summary>
        /// <exception cref="NotImplementedException"></exception>
        private void WaitExitCall()
        {
            Console.WriteLine($"{Name}-WaitExitCall");
        }

        /// <summary>
        /// 进入 等待
        /// </summary>
        private void WaitEntryCall()
        {
            RunStateMsg = "等待";
            Console.WriteLine($"{Name}-WaitExitCall");
        }

        #endregion

        /// <summary>
        /// 设备名称
        /// </summary>
        public string Name { get; set; }
        public IEventAggregator EventAggregator { get; }
        public ConfigService ConfigService { get; }
    }
}