// Copyright (c) 2022 Dominic Masters
// 
// This software is released under the MIT License.
// https://opensource.org/licenses/MIT

#pragma once
#include "event/Event.hpp"
#include "Easing.hpp"
#include "util/mathutils.hpp"

namespace Dawn {
  struct Animation {
    public:
      bool_t loop = false;
      bool_t finished = false;
      float_t time = 0;
      float_t duration = 0;
      Event<> eventAnimationEnd;
      
      /**
       * Ticks the animation along. Delta is whatever you want to update the
       * animation by (in seconds). Animations can overshoot if necessary and
       * will not be clamped (by default). Subclasses may interpret ticks in
       * different ways.
       * 
       * @param delta Time delta (in seconds) to tick the animaiton by.
       */
      virtual void tick(float_t delta) = 0;
      
      /**
       * Restart a running animation.
       */
      virtual void restart();

      /**
       * Clears an animaton of all its animation items and keyframes.
       */
      virtual void clear();
  };
}