using Godot;
using System.Collections.Generic;
using System.Linq;

namespace Rokojori
{  
  
  public class SequenceActionFinishedEvent
  {
    public int id;
    public bool success;
  }

  [Tool]
  [GlobalClass, Icon("res://addons/rokojori_action_library/Icons/SequenceAction.svg")]
  public abstract partial class SequenceAction : Action
  {  
    
    [ExportGroup("Debugging")]
    [ExportToolButton("Clear Listeners")]
    public Callable clearListeners => Callable.From(
      ()=>
      {
        onSequenceDone.ResetAndClearAll();
      }
    );

    [Export]
    public bool showRunningSequences = false;

    [Export]
    public int[] runningSequences = [];

    HashSet<int> _running = new HashSet<int>();
    
    int _dispatchCounter = 0;

    public int GetLastSequenceActionID()
    {
      return _dispatchCounter;
    }

    public readonly EventSlot<SequenceActionFinishedEvent> onSequenceDone = new EventSlot<SequenceActionFinishedEvent>();

    public int DispatchStart()
    {
      _dispatchCounter ++;
      
      if ( showRunningSequences )
      {
        runningSequences = runningSequences.Add( _dispatchCounter );
      }

      _running.Add( _dispatchCounter );

      return _dispatchCounter;
    }

    public void DispatchEnd( int id )
    {
      _running.Remove( id );

      var ev = new SequenceActionFinishedEvent{ id = id, success = true };
      onSequenceDone.DispatchEvent( ev );

      if ( showRunningSequences )
      {
        runningSequences = runningSequences.Remove( _dispatchCounter );
      }

      
    }

    public void DispatchCancelled( int id )
    {
      _running.Remove( id );

      var ev = new SequenceActionFinishedEvent{ id = id, success = true };
      onSequenceDone.DispatchEvent( ev );

      if ( showRunningSequences )
      {
        runningSequences = runningSequences.Remove( _dispatchCounter );
      }

      
    }

    public virtual void CancelAllRunning()
    {
      var runningList = _running.ToArray();

      runningList.ForEach(
        ( id )=>
        {
          CancelAction( id );
        }
      );
    }

    public virtual void CancelAction( int id )
    {
      
    }

    public int TriggerSequenceAndGetID()
    {
      var nextID = GetLastSequenceActionID() + 1;

      Trigger();

      return GetLastSequenceActionID() < nextID ? -1 : nextID;
    }

  
  }

}