using System.Diagnostics;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Aitex.Core.RT.Fsm;
using Aitex.Core.RT.Log;
using Aitex.Core.Util;
using Aitex.Core.RT.SCCore;
using Aitex.Sorter.Common;
using MECF.Framework.Common.Equipment;
using MECF.Framework.Common.Schedulers;
using MECF.Framework.Common.SubstrateTrackings;
using Venus_RT.Scheduler;

namespace Venus_RT.Modules.Schedulers
{
    class SchedulerItem
    {
        public TMEntity.MSG MoveType { get;  set; }
        public ModuleName target { get;  set; }

        public Queue<MoveItem> moveList { get;  set; }

    }
    public class SchedulerTMRobot : SchedulerModule
    {
        public override bool IsAvailable
        {
            get { return _entity.IsIdle && /*_entity.IsOnline && */RunSchedulers(); }
        }
        public override bool IsOnline
        {
            get { return _entity.IsOnline; }

        }
        public override bool IsError
        {
            get { return _entity.IsError; }

        }

        private TMEntity _entity = null;
        public int _entityTaskToken = (int)FSM_MSG.NONE;
        private Queue<SchedulerItem> _schedulerList = new Queue<SchedulerItem>();
        private SchedulerItem _currentScheduler = null;
        public SchedulerTMRobot() : base(ModuleName.TM.ToString())
        {
            _entity = Singleton<RouteManager>.Instance.TM;

        }

        private bool CheckTaskDone()
        {
            bool ret = false;
            switch (_entityTaskToken)
            {
                case (int)TMEntity.MSG.Pick:
                case (int)TMEntity.MSG.PMPick:
                    ret = WaferManager.Instance.CheckHasWafer(_currentScheduler.moveList.Peek().DestinationModule, _currentScheduler.moveList.Peek().DestinationSlot) &&
                        WaferManager.Instance.CheckNoWafer(_currentScheduler.moveList.Peek().SourceModule, _currentScheduler.moveList.Peek().SourceSlot);
                    break;
                case (int)TMEntity.MSG.Place:
                case (int)TMEntity.MSG.PMPlace:
                    ret = WaferManager.Instance.CheckHasWafer(_currentScheduler.moveList.Peek().DestinationModule, _currentScheduler.moveList.Peek().DestinationSlot) &&
                        WaferManager.Instance.CheckNoWafer(_currentScheduler.moveList.Peek().SourceModule, _currentScheduler.moveList.Peek().SourceSlot);
                    break;
                case (int)TMEntity.MSG.Swap:
                    ret = WaferManager.Instance.CheckHasWafer(_currentScheduler.moveList.Peek().DestinationModule, _currentScheduler.moveList.Peek().DestinationSlot) &&
                        WaferManager.Instance.CheckHasWafer(_currentScheduler.moveList.Last().DestinationModule, _currentScheduler.moveList.Last().DestinationSlot);
                    break;
                case (int)TMEntity.MSG.PMSwap:
                    ret = WaferManager.Instance.CheckHasWafer(_currentScheduler.moveList.Peek().DestinationModule, _currentScheduler.moveList.Peek().DestinationSlot) &&
                        WaferManager.Instance.CheckHasWafer(_currentScheduler.moveList.Peek().SourceModule, _currentScheduler.moveList.Peek().SourceSlot);
                    break;
                case (int)FSM_MSG.NONE:
                    ret = true;
                    break;
            }

            if(ret && _entityTaskToken != (int)FSM_MSG.NONE)
            {
                _entityTaskToken = (int)FSM_MSG.NONE;
                LOG.Write(eEvent.EV_ROUTER, ModuleName.TM, $"Scheduler, { _currentScheduler.target} Task done: { _currentScheduler.MoveType}");
            }

            return ret;
        }

        public bool PostMoveItems(MoveItem[] items)
        {
            foreach(var item in items)
            {
                LOG.Write(eEvent.EV_ROUTER, ModuleName.TMRobot, $"Post Moving Item: {item.SourceModule} Slot {item.SourceSlot + 1} => {item.DestinationModule} Slot {item.DestinationSlot + 1}");
            }

            void PackPMSwapCmds(MoveItem[] swapItems)
            {
                // must swap the item order for PM swap
                if (!ModuleHelper.IsTMRobot(swapItems[1].SourceModule))
                {
                    SchedulerItem item = new SchedulerItem();
                    item.MoveType = TMEntity.MSG.Pick;
                    item.target = swapItems[1].SourceModule;
                    item.moveList = new Queue<MoveItem>();
                    item.moveList.Enqueue(new MoveItem(swapItems[1].SourceModule, swapItems[1].SourceSlot, ModuleName.TMRobot, 0, (Hand)0));
                    _schedulerList.Enqueue(item);
                }
                
                SchedulerItem swap = new SchedulerItem();
                swap.MoveType = TMEntity.MSG.PMSwap;
                swap.target = swapItems[0].SourceModule;
                swap.moveList = new Queue<MoveItem>();
                swap.moveList.Enqueue(new MoveItem(swapItems[0].SourceModule, swapItems[0].SourceSlot, ModuleName.TMRobot, 1, (Hand)1));
                swap.moveList.Enqueue(new MoveItem(ModuleName.TMRobot, 0, swapItems[1].DestinationModule, swapItems[1].DestinationSlot, (Hand)0));
                _schedulerList.Enqueue(swap);

                if (!ModuleHelper.IsTMRobot(swapItems[0].DestinationModule))
                {
                    SchedulerItem last = new SchedulerItem();
                    last.MoveType = TMEntity.MSG.Place;
                    last.target = swapItems[0].DestinationModule;
                    last.moveList = new Queue<MoveItem>();
                    last.moveList.Enqueue(new MoveItem(ModuleName.TMRobot, 1, swapItems[0].DestinationModule, swapItems[0].DestinationSlot, (Hand)1));
                    _schedulerList.Enqueue(last);
                }
            }

            void PackSwapCmds(MoveItem[] swapItems, TMEntity.MSG swapType, int swapIndex)
            {
                SchedulerItem swap = new SchedulerItem();
                swap.MoveType = swapType;
                swap.target = swapItems[0].DestinationModule;
                swap.moveList = new Queue<MoveItem>();

                for (int i = 0; i < swapIndex; i++)
                {
                    if(!ModuleHelper.IsTMRobot(swapItems[i].SourceModule))
                    {
                        SchedulerItem item = new SchedulerItem();
                        item.MoveType = ModuleHelper.IsLoadLock(swapItems[i].SourceModule) ? TMEntity.MSG.Pick : TMEntity.MSG.PMPick;
                        item.target = swapItems[i].SourceModule;
                        item.moveList = new Queue<MoveItem>();
                        item.moveList.Enqueue(new MoveItem(swapItems[i].SourceModule, swapItems[i].SourceSlot, ModuleName.TMRobot, i, (Hand)i));
                        _schedulerList.Enqueue(item);

                        swap.moveList.Enqueue(new MoveItem(ModuleName.TMRobot, i, swapItems[i].DestinationModule, swapItems[i].DestinationSlot, (Hand)i));
                    }
                }

                for (int j = swapIndex; j < swapItems.Length; j++)
                {
                    swap.moveList.Enqueue(new MoveItem(swapItems[j].SourceModule, swapItems[j].SourceSlot, ModuleName.TMRobot, j - swapIndex, (Hand)(j - swapIndex)));
                }
                _schedulerList.Enqueue(swap);

                for (int j = swapIndex; j < swapItems.Length; j++)
                {
                    if (!ModuleHelper.IsTMRobot(swapItems[j].DestinationModule))
                    {
                        SchedulerItem item = new SchedulerItem();
                        item.MoveType = ModuleHelper.IsLoadLock(swapItems[j].DestinationModule) ?  TMEntity.MSG.Place : TMEntity.MSG.PMPlace;
                        item.target = swapItems[j].DestinationModule;
                        item.moveList = new Queue<MoveItem>();
                        item.moveList.Enqueue(new MoveItem(ModuleName.TMRobot, j - swapIndex, swapItems[j].DestinationModule, swapItems[j].DestinationSlot, (Hand)(j - swapIndex)));
                        _schedulerList.Enqueue(item);
                    }
                }
            }

            if(WaferManager.Instance.CheckNoWafer(ModuleName.TMRobot, 0) && WaferManager.Instance.CheckNoWafer(ModuleName.TMRobot, 1))
            {
                if (items.Length == 4)
                {
                    if (ModuleHelper.IsLoadLock(items[0].DestinationModule) &&
                        items[0].DestinationModule == items[1].DestinationModule &&
                        items[0].DestinationModule == items[2].SourceModule &&
                        items[0].DestinationModule == items[3].SourceModule)
                    {
                        PackSwapCmds(items,  TMEntity.MSG.Swap, 2);
                    }
                }
                else if (items.Length == 3)
                {
                    if (ModuleHelper.IsLoadLock(items[0].DestinationModule) &&
                        items[0].DestinationModule == items[1].DestinationModule &&
                        items[0].DestinationModule == items[2].SourceModule)
                    {
                        PackSwapCmds(items, TMEntity.MSG.Swap, 2);
                    }
                    else if (ModuleHelper.IsLoadLock(items[0].DestinationModule) &&
                        items[0].DestinationModule == items[1].SourceModule &&
                        items[0].DestinationModule == items[2].SourceModule)
                    {
                        PackSwapCmds(items, TMEntity.MSG.Swap, 1);
                    }
                }
                else if (items.Length == 2)
                {
                    if (ModuleHelper.IsLoadLock(items[0].DestinationModule) &&
                        items[0].DestinationModule == items[1].DestinationModule)
                    {
                        PackSwapCmds(items, TMEntity.MSG.Swap, 2);
                    }
                    else if (ModuleHelper.IsLoadLock(items[0].SourceModule) &&
                        items[0].SourceModule == items[1].SourceModule)
                    {
                        PackSwapCmds(items, TMEntity.MSG.Swap, 0);
                    }
                    else if (ModuleHelper.IsPm(items[0].SourceModule) &&
                        items[0].SourceModule == items[1].DestinationModule)
                    {
                        PackPMSwapCmds(items);
                    }
                }
            }


            Hand freeHand = SelectFreeHand();
            if(freeHand == Hand.None)
            {
                LOG.Write(eEvent.WARN_ROUTER, ModuleName.TMRobot, "No Free Arm to transfer wafer");
                return false;
            }
            if(_schedulerList.Count == 0)
            {
                foreach(var moveItem in items)
                {
                    if(!ModuleHelper.IsTMRobot(moveItem.SourceModule) && !ModuleHelper.IsTMRobot(moveItem.DestinationModule))
                    {
                        SchedulerItem item = new SchedulerItem();
                        item.MoveType = ModuleHelper.IsLoadLock(moveItem.SourceModule) ?  TMEntity.MSG.Pick : TMEntity.MSG.PMPick;
                        item.target = moveItem.SourceModule;
                        item.moveList = new Queue<MoveItem>();
                        item.moveList.Enqueue(new MoveItem(moveItem.SourceModule, moveItem.SourceSlot, ModuleName.TMRobot, (int)freeHand, freeHand));
                        _schedulerList.Enqueue(item);

                        item = new SchedulerItem();
                        item.MoveType = ModuleHelper.IsLoadLock(moveItem.DestinationModule) ? TMEntity.MSG.Place : TMEntity.MSG.PMPlace;
                        item.target = moveItem.DestinationModule;
                        item.moveList = new Queue<MoveItem>();
                        item.moveList.Enqueue(new MoveItem(ModuleName.TMRobot, (int)freeHand, moveItem.DestinationModule, moveItem.DestinationSlot, freeHand));
                        _schedulerList.Enqueue(item);
                    }
                    else if(ModuleHelper.IsTMRobot(moveItem.SourceModule))
                    {
                        SchedulerItem item = new SchedulerItem();
                        item.MoveType = ModuleHelper.IsLoadLock(moveItem.DestinationModule) ? TMEntity.MSG.Place : TMEntity.MSG.PMPlace;
                        item.target = moveItem.DestinationModule;
                        item.moveList = new Queue<MoveItem>();
                        item.moveList.Enqueue(new MoveItem(ModuleName.TMRobot, moveItem.SourceSlot, moveItem.DestinationModule, moveItem.DestinationSlot, (Hand)moveItem.SourceSlot));
                        _schedulerList.Enqueue(item);
                    }
                    else if(ModuleHelper.IsTMRobot(moveItem.DestinationModule))
                    {
                        SchedulerItem item = new SchedulerItem();
                        item.MoveType = ModuleHelper.IsLoadLock(moveItem.SourceModule) ? TMEntity.MSG.Pick : TMEntity.MSG.PMPick;
                        item.target = moveItem.SourceModule;
                        item.moveList = new Queue<MoveItem>();
                        item.moveList.Enqueue(new MoveItem(moveItem.SourceModule, moveItem.SourceSlot, ModuleName.TMRobot, moveItem.DestinationSlot, (Hand)moveItem.DestinationSlot));
                        _schedulerList.Enqueue(item);
                    }
                }
            }

            RunSchedulers();
            return true;
        }

        Hand SelectFreeHand()
        {
            if (WaferManager.Instance.CheckNoWafer(ModuleName.TMRobot, 0))
                return Hand.Blade1;

            if (WaferManager.Instance.CheckNoWafer(ModuleName.TMRobot, 1))
                return Hand.Blade2;

            return Hand.None;
        }

        bool RunSchedulers()
        {
            if(_entity.IsIdle && CheckTaskDone())
            {
                if (_schedulerList.Count == 0)
                    return true;

                _currentScheduler = _schedulerList.Dequeue();
                Queue<MoveItem> moveItems = new Queue<MoveItem>();
                foreach(var item in _currentScheduler.moveList)
                {
                    moveItems.Enqueue(item);
                    LOG.Write(eEvent.INFO_TM, ModuleName.TMRobot, $"TM Moving Items: {item.SourceModule} Slot {item.SourceSlot + 1} => {item.DestinationModule} Slot {item.DestinationSlot + 1}");
                }

                if(_entity.CheckToPostMessage((int)_currentScheduler.MoveType, moveItems))
                {
                    _entityTaskToken = (int)_currentScheduler.MoveType;
                }
                else
                    _entityTaskToken = (int)FSM_MSG.NONE;
            }

            return false;
        }
    }
}