using System;
using Godot;


namespace Rokojori
{  
  [Tool]
  [GlobalClass ]
  public partial class TweenFloatShaderProperty:SequenceAction, Animator
  {
    [Export]
    public Material material;

    [Export]
    public FloatPropertyName propertyName;

    [Export]
    public float endValue;

    [Export]
    public Duration duration;

    [Export]
    public Curve curve;

    public void OnAnimatorStart(){}
    public void OnAnimatorEnd(){}
    public void OnAnimatorCancel(){}

    int _actionID = -1;
    int _timeID = -1;

    [Export]
    public bool interruptCurrent = true;

    protected override void _OnTrigger()
    {

      if ( ! interruptCurrent && _actionID != -1 )
      {
        // this.LogInfo( "Already running" );
        return;
      }

      // this.LogInfo( "Started Float Tween" );
      

      if ( Engine.IsEditorHint() )
      {
        return;
      }

      

      if ( _actionID != -1 )
      {
        CancelAction( _actionID );
      }

      _actionID = DispatchStart();
      
      var startValue = propertyName.Get( material );
      
      AnimationManager.StartAnimation( this, material, propertyName );

      // this.LogInfo( "Get Float Tween", startValue );

      _timeID = TimeLineManager.ScheduleSpanWith( duration,
        ( span, type )=>
        {         

          // this.LogInfo( "Update Float Tween", startValue );
          if ( span.id != _timeID )
          {
            return;
          }

          if ( ! AnimationManager.IsAnimating( this, material, propertyName  ) )
          {
            return;
          }

          var phase = span.phase;

          if ( curve != null )
          {
            phase = curve.Sample( phase );
          }

          var value = Mathf.Lerp( startValue, endValue, phase );

          // this.LogInfo( "Updating Float Tween", "phase:", phase, "value:", value, target );

          propertyName.Set( material, value );
          // ReflectionHelper.SetValue( material, propertyName , value );
         
          if ( type == TimeLineSpanUpdateType.End )
          {   
            // this.LogInfo( "End Float Tween", endValue );  

            // target._Set( targetMember, endValue );     

            propertyName.Set( material, endValue );
            AnimationManager.EndAnimation( this, material, propertyName );
            DispatchEnd( _actionID );
            _actionID = -1;
            _timeID = -1;
          }
        }
      ).id;
    }

  }
}