// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_ANIMATIONWORKLET_WORKLET_ANIMATION_EFFECT_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_ANIMATIONWORKLET_WORKLET_ANIMATION_EFFECT_H_

#include <optional>

#include "base/time/time.h"
#include "third_party/blink/renderer/core/animation/timing.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"

namespace blink {

class EffectTiming;
class ComputedEffectTiming;

class MODULES_EXPORT WorkletAnimationEffect : public ScriptWrappable {
  DEFINE_WRAPPERTYPEINFO();

 public:
  WorkletAnimationEffect(std::optional<base::TimeDelta> local_time,
                         const Timing& timing,
                         const Timing::NormalizedTiming& normalized_timing);

  // Because getTiming needs to be used below, SpecifiedTiming will be used to
  // return the specified Timing object given at initialization
  const Timing& SpecifiedTiming() { return specified_timing_; }
  const Timing::NormalizedTiming& NormalizedTiming() {
    return normalized_timing_;
  }

  // This function is named getTiming() as opposed to getEffectTiming() because
  // that is how it is defined in worklet_animation_effect.idl
  EffectTiming* getTiming() const;

  ComputedEffectTiming* getComputedTiming() const;

  std::optional<double> localTime() const;
  void setLocalTime(std::optional<double> time_ms);
  std::optional<base::TimeDelta> local_time() const;

 private:
  void UpdateInheritedTime(double inherited_time) const;

  std::optional<base::TimeDelta> local_time_;
  // We chose to not call this variable "timing_" to avoid confusion with the
  // above function call getTiming() which returns a pointer to an EffectTiming
  // object, as is defined in worklet_animation_effect.idl.
  const Timing specified_timing_;
  const Timing::NormalizedTiming normalized_timing_;
  mutable Timing::CalculatedTiming calculated_;
  // last_update_time_ has type base::TimeDelta to match the type of local_time_
  // since it is a cached value of local_time_
  mutable std::optional<base::TimeDelta> last_update_time_;
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_ANIMATIONWORKLET_WORKLET_ANIMATION_EFFECT_H_