using System.Diagnostics;
using System.Collections;
using System.Collections.Generic;
using System;
using Godot;


namespace Rokojori
{  

  // public class SequenceRunner
  // {
  //   public Sequence sequence;
  //   public List<Action> actions;
  //   public List<SequenceAction> sequencables;
  //   public int sequencablesIndex = 0;
  //   bool cancelled = false;
  //   bool cancelledSequence = false;

    
  //   int _runID = -1;
    
  //   SequenceAction _runningAction;
  //   int _runningActionID = -1;

  //   public void Cancel()
  //   {
  //     if ( cancelled || _runningAction == null )
  //     {
  //       return;
  //     }

  //     cancelled = true;
  //     _runningAction.CancelAction( _runningActionID );
  //   }

  //   void CancelRun()
  //   {
  //     if ( cancelledSequence )
  //     {
  //       return;
  //     }

  //     if ( ! cancelled )
  //     {
  //       cancelled = true;
  //     }

  //     cancelledSequence = true;
  //     sequence.DispatchCancelled( _runID );
  //     sequence.ClearRun( this );
  //   }


  //   public void ProcessNext()
  //   {
  //     // RJLog.Log( "@" + sequence.Name, "Index:", sequencablesIndex );

  //     if ( sequencablesIndex == 0 )
  //     {
  //       _runID = sequence.DispatchStart();

  //       if ( sequencables.Count == 0 )
  //       {
  //         actions.ForEach( a => Action.TriggerSafe( a ) );
  //         sequence.DispatchEnd( _runID );
  //         sequence.ClearRun( this );
  //         return;
  //       }
  //     }

  //     if ( sequencablesIndex >= sequencables.Count )
  //     {
  //       TriggerAllAfter( sequencables[ sequencables.Count -1 ] );
  //       sequence.DispatchEnd( _runID );
  //       sequence.ClearRun( this );
  //       return;
  //     }

  //     if ( cancelled )
  //     {
  //       CancelRun();
  //       return;
  //     }     
      

  //     var sequenceAction = sequencables[ sequencablesIndex ];
  //     StartAction( sequenceAction );      
  //   } 

  //   Dictionary<SequenceAction,System.Action<SequenceAction.FinishedEvent>> callbacks = 
  //   new Dictionary<SequenceAction, System.Action<SequenceAction.FinishedEvent>>(); 

  //   void StartAction( SequenceAction action )
  //   {
  //     var capturedAction = action;

  //     System.Action<SequenceAction.FinishedEvent> callback = 
  //       ( SequenceAction.FinishedEvent ev ) =>
  //       {
          
          
  //         //RJLog.Log( "On Done", id, success );

  //         if ( ev.id != _runningActionID )
  //         {
  //           // RJLog.Error( "Invalid ID", id, "!=", _runningActionID );
  //           return;
  //         }

  //         _runningActionID = -1;

  //         if ( ev.success )
  //         {
  //           sequencablesIndex ++;
  //           ProcessNext();
  //         }
  //         else 
  //         {
  //           sequence.DispatchCancelled( _runID );
  //           sequence.ClearRun( this );
  //         }

  //         var callbackReference = callbacks[ capturedAction ];          
  //         capturedAction.onSequenceDone.RemoveAction( callbackReference );

  //         callbacks.Remove( capturedAction );
  //       };

  //     RunNext( action, callback );

  //     /*      
  //     _runningAction = action;
  //     callbacks[ _runningAction ] = callback;
  //     _runningAction.OnSequenceDone += callback;
  //     TriggerAllBefore( _runningAction );
  //     Action.Trigger( _runningAction );
  //     _runningActionID = _runningAction.GetLastSequenceActionID();
  //     */
  //   }

  //   void RunNext( SequenceAction action, System.Action<SequenceAction.FinishedEvent> callback )
  //   {
  //     _runningAction = action;
  //     callbacks[ _runningAction ] = callback;
  //     _runningAction.onSequenceDone.AddAction( callback );


  //     TriggerAllBefore( _runningAction );
  //     Action.TriggerSafe( _runningAction );
  //     _runningActionID = _runningAction.GetLastSequenceActionID();
  //   }

  //   void TriggerAllBefore( SequenceAction action )
  //   {
  //     var actionIndex = actions.IndexOf( action );

  //     for ( int i = actionIndex - 1; i >= 0; i -- )
  //     {        
  //       if ( typeof( SequenceAction ).IsAssignableFrom( actions[ i ].GetType() ) )
  //       {
  //         return;
  //       }

  //       // RJLog.Log( _runID, "Triggering Actions Before", i, actions[ i ].Name, HierarchyName.Of( action ) );

  //       Action.TriggerSafe( actions[ i ] );
  //     }
      
  //   }

  //   void TriggerAllAfter( SequenceAction action )
  //   {
  //     var actionIndex = actions.IndexOf( action );

  //     for ( int i = actionIndex + 1; i < actions.Count; i ++ )
  //     {        
  //       if ( typeof( SequenceAction ).IsAssignableFrom( actions[ i ].GetType() ) )
  //       {
  //         return;
  //       }

  //       // RJLog.Log( "Triggering Action", actions[ i ].Name );
  //       Action.TriggerSafe( actions[ i ] );
  //     }
      
  //   }


  // }


  [Tool]
  [GlobalClass, Icon("res://addons/rokojori_action_library/Icons/Sequence.svg") ]
  [RokojoriActionCoreExport]
  public partial class Sequence:SequenceAction
  { 
    /** <summary for="field actions">Actions to execute</summary>*/
    [Export]
    public Action[] actions = new Action[ 0 ];

    [Export]    
    public bool triggerDirectChildren = true;

    List<SequenceRunner> running = new List<SequenceRunner>();

    [Export]
    public bool noOverlays = false;

    protected override void _OnTrigger()
    {      
      if ( noOverlays && running.Count > 0 )
      {
        return;
      }

      // this.LogInfo( "Running" );
      

      var run = new SequenceRunner();
      run.sequence = this;
      run.actions = new List<Action>( actions );
      
      if ( triggerDirectChildren )
      {
        Nodes.ForEachDirectChild<Action>( this, a => run.actions.Add( a ) );
      }

      run.sequencables = Lists.FilterType<Action,SequenceAction>( run.actions );

      


     // RJLog.Log( "Running", HierarchyName.Of( this ), run.sequencables.Count );
      running.Add( run );
      run.ProcessNext();
    } 

    public override void CancelAction( int id )
    {
      running.ForEach( r => r.Cancel() );
    }

    public void ClearRun( SequenceRunner run )
    {
      running.Remove( run );
    }
    
  }

  

}