// Copyright 2009-2020 Intel Corporation
// SPDX-License-Identifier: Apache-2.0

#pragma once

#include "../../common/sys/platform.h"
#include "../../common/sys/sysinfo.h"
#include "../../common/sys/thread.h"
#include "../../common/sys/alloc.h"
#include "../../common/sys/ref.h"
#include "../../common/sys/intrinsics.h"
#include "../../common/sys/atomic.h"
#include "../../common/sys/mutex.h"
#include "../../common/sys/vector.h"
#include "../../common/sys/array.h"
#include "../../common/sys/string.h"
#include "../../common/sys/regression.h"
#include "../../common/sys/vector.h"

#include "../../common/math/math.h"
#include "../../common/math/transcendental.h"
#include "../../common/simd/simd.h"
#include "../../common/math/vec2.h"
#include "../../common/math/vec3.h"
#include "../../common/math/vec4.h"
#include "../../common/math/vec2fa.h"
#include "../../common/math/vec3fa.h"
#include "../../common/math/interval.h"
#include "../../common/math/bbox.h"
#include "../../common/math/obbox.h"
#include "../../common/math/lbbox.h"
#include "../../common/math/linearspace2.h"
#include "../../common/math/linearspace3.h"
#include "../../common/math/affinespace.h"
#include "../../common/math/range.h"
#include "../../common/lexers/tokenstream.h"

#include "../../common/tasking/taskscheduler.h"

#define COMMA ,

#include "../config.h"
#include "isa.h"
#include "stat.h"
#include "profile.h"
#include "rtcore.h"
#include "vector.h"
#include "state.h"
#include "instance_stack.h"

#include <vector>
#include <map>
#include <algorithm>
#include <functional>
#include <utility>
#include <sstream>

#if !defined(_DEBUG) && defined(BUILD_IOS)
#undef assert
#define assert(_EXPR)
#endif

namespace embree
{
  ////////////////////////////////////////////////////////////////////////////////
  /// Vec2 shortcuts
  ////////////////////////////////////////////////////////////////////////////////

  template<int N> using Vec2vf  = Vec2<vfloat<N>>;
  template<int N> using Vec2vd  = Vec2<vdouble<N>>;
  template<int N> using Vec2vr  = Vec2<vreal<N>>;
  template<int N> using Vec2vi  = Vec2<vint<N>>;
  template<int N> using Vec2vl  = Vec2<vllong<N>>;
  template<int N> using Vec2vb  = Vec2<vbool<N>>;
  template<int N> using Vec2vbf = Vec2<vboolf<N>>;
  template<int N> using Vec2vbd = Vec2<vboold<N>>;

  typedef Vec2<vfloat4>  Vec2vf4;
  typedef Vec2<vdouble4> Vec2vd4;
  typedef Vec2<vreal4>   Vec2vr4;
  typedef Vec2<vint4>    Vec2vi4;
  typedef Vec2<vllong4>  Vec2vl4;
  typedef Vec2<vbool4>   Vec2vb4;
  typedef Vec2<vboolf4>  Vec2vbf4;
  typedef Vec2<vboold4>  Vec2vbd4;

  typedef Vec2<vfloat8>  Vec2vf8;
  typedef Vec2<vdouble8> Vec2vd8;
  typedef Vec2<vreal8>   Vec2vr8;
  typedef Vec2<vint8>    Vec2vi8;
  typedef Vec2<vllong8>  Vec2vl8;
  typedef Vec2<vbool8>   Vec2vb8;
  typedef Vec2<vboolf8>  Vec2vbf8;
  typedef Vec2<vboold8>  Vec2vbd8;

  typedef Vec2<vfloat16>  Vec2vf16;
  typedef Vec2<vdouble16> Vec2vd16;
  typedef Vec2<vreal16>   Vec2vr16;
  typedef Vec2<vint16>    Vec2vi16;
  typedef Vec2<vllong16>  Vec2vl16;
  typedef Vec2<vbool16>   Vec2vb16;
  typedef Vec2<vboolf16>  Vec2vbf16;
  typedef Vec2<vboold16>  Vec2vbd16;

  typedef Vec2<vfloatx>  Vec2vfx;
  typedef Vec2<vdoublex> Vec2vdx;
  typedef Vec2<vrealx>   Vec2vrx;
  typedef Vec2<vintx>    Vec2vix;
  typedef Vec2<vllongx>  Vec2vlx;
  typedef Vec2<vboolx>   Vec2vbx;
  typedef Vec2<vboolfx>  Vec2vbfx;
  typedef Vec2<vbooldx>  Vec2vbdx;

  ////////////////////////////////////////////////////////////////////////////////
  /// Vec3 shortcuts
  ////////////////////////////////////////////////////////////////////////////////

  template<int N> using Vec3vf  = Vec3<vfloat<N>>;
  template<int N> using Vec3vd  = Vec3<vdouble<N>>;
  template<int N> using Vec3vr  = Vec3<vreal<N>>;
  template<int N> using Vec3vi  = Vec3<vint<N>>;
  template<int N> using Vec3vl  = Vec3<vllong<N>>;
  template<int N> using Vec3vb  = Vec3<vbool<N>>;
  template<int N> using Vec3vbf = Vec3<vboolf<N>>;
  template<int N> using Vec3vbd = Vec3<vboold<N>>;

  typedef Vec3<vfloat4>  Vec3vf4;
  typedef Vec3<vdouble4> Vec3vd4;
  typedef Vec3<vreal4>   Vec3vr4;
  typedef Vec3<vint4>    Vec3vi4;
  typedef Vec3<vllong4>  Vec3vl4;
  typedef Vec3<vbool4>   Vec3vb4;
  typedef Vec3<vboolf4>  Vec3vbf4;
  typedef Vec3<vboold4>  Vec3vbd4;

  typedef Vec3<vfloat8>  Vec3vf8;
  typedef Vec3<vdouble8> Vec3vd8;
  typedef Vec3<vreal8>   Vec3vr8;
  typedef Vec3<vint8>    Vec3vi8;
  typedef Vec3<vllong8>  Vec3vl8;
  typedef Vec3<vbool8>   Vec3vb8;
  typedef Vec3<vboolf8>  Vec3vbf8;
  typedef Vec3<vboold8>  Vec3vbd8;

  typedef Vec3<vfloat16>  Vec3vf16;
  typedef Vec3<vdouble16> Vec3vd16;
  typedef Vec3<vreal16>   Vec3vr16;
  typedef Vec3<vint16>    Vec3vi16;
  typedef Vec3<vllong16>  Vec3vl16;
  typedef Vec3<vbool16>   Vec3vb16;
  typedef Vec3<vboolf16>  Vec3vbf16;
  typedef Vec3<vboold16>  Vec3vbd16;

  typedef Vec3<vfloatx>  Vec3vfx;
  typedef Vec3<vdoublex> Vec3vdx;
  typedef Vec3<vrealx>   Vec3vrx;
  typedef Vec3<vintx>    Vec3vix;
  typedef Vec3<vllongx>  Vec3vlx;
  typedef Vec3<vboolx>   Vec3vbx;
  typedef Vec3<vboolfx>  Vec3vbfx;
  typedef Vec3<vbooldx>  Vec3vbdx;

  ////////////////////////////////////////////////////////////////////////////////
  /// Vec4 shortcuts
  ////////////////////////////////////////////////////////////////////////////////

  template<int N> using Vec4vf  = Vec4<vfloat<N>>;
  template<int N> using Vec4vd  = Vec4<vdouble<N>>;
  template<int N> using Vec4vr  = Vec4<vreal<N>>;
  template<int N> using Vec4vi  = Vec4<vint<N>>;
  template<int N> using Vec4vl  = Vec4<vllong<N>>;
  template<int N> using Vec4vb  = Vec4<vbool<N>>;
  template<int N> using Vec4vbf = Vec4<vboolf<N>>;
  template<int N> using Vec4vbd = Vec4<vboold<N>>;

  typedef Vec4<vfloat4>  Vec4vf4;
  typedef Vec4<vdouble4> Vec4vd4;
  typedef Vec4<vreal4>   Vec4vr4;
  typedef Vec4<vint4>    Vec4vi4;
  typedef Vec4<vllong4>  Vec4vl4;
  typedef Vec4<vbool4>   Vec4vb4;
  typedef Vec4<vboolf4>  Vec4vbf4;
  typedef Vec4<vboold4>  Vec4vbd4;

  typedef Vec4<vfloat8>  Vec4vf8;
  typedef Vec4<vdouble8> Vec4vd8;
  typedef Vec4<vreal8>   Vec4vr8;
  typedef Vec4<vint8>    Vec4vi8;
  typedef Vec4<vllong8>  Vec4vl8;
  typedef Vec4<vbool8>   Vec4vb8;
  typedef Vec4<vboolf8>  Vec4vbf8;
  typedef Vec4<vboold8>  Vec4vbd8;

  typedef Vec4<vfloat16>  Vec4vf16;
  typedef Vec4<vdouble16> Vec4vd16;
  typedef Vec4<vreal16>   Vec4vr16;
  typedef Vec4<vint16>    Vec4vi16;
  typedef Vec4<vllong16>  Vec4vl16;
  typedef Vec4<vbool16>   Vec4vb16;
  typedef Vec4<vboolf16>  Vec4vbf16;
  typedef Vec4<vboold16>  Vec4vbd16;

  typedef Vec4<vfloatx>  Vec4vfx;
  typedef Vec4<vdoublex> Vec4vdx;
  typedef Vec4<vrealx>   Vec4vrx;
  typedef Vec4<vintx>    Vec4vix;
  typedef Vec4<vllongx>  Vec4vlx;
  typedef Vec4<vboolx>   Vec4vbx;
  typedef Vec4<vboolfx>  Vec4vbfx;
  typedef Vec4<vbooldx>  Vec4vbdx;

  ////////////////////////////////////////////////////////////////////////////////
  /// Other shortcuts
  ////////////////////////////////////////////////////////////////////////////////

  template<int N> using BBox3vf = BBox<Vec3vf<N>>;
  typedef BBox<Vec3vf4>  BBox3vf4;
  typedef BBox<Vec3vf8>  BBox3vf8;
  typedef BBox<Vec3vf16> BBox3vf16;

  /* calculate time segment itime and fractional time ftime */
  __forceinline int getTimeSegment(float time, float numTimeSegments, float& ftime)
  {
    const float timeScaled = time * numTimeSegments;
    const float itimef = clamp(floorf(timeScaled), 0.0f, numTimeSegments-1.0f);
    ftime = timeScaled - itimef;
    return int(itimef);
  }

  __forceinline int getTimeSegment(float time, float start_time, float end_time, float numTimeSegments, float& ftime)
  {
    const float timeScaled = (time-start_time)/(end_time-start_time) * numTimeSegments;
    const float itimef = clamp(floorf(timeScaled), 0.0f, numTimeSegments-1.0f);
    ftime = timeScaled - itimef;
    return int(itimef);
  }

  template<int N>
  __forceinline vint<N> getTimeSegment(const vfloat<N>& time, const vfloat<N>& numTimeSegments, vfloat<N>& ftime)
  {
    const vfloat<N> timeScaled = time * numTimeSegments;
    const vfloat<N> itimef = clamp(floor(timeScaled), vfloat<N>(zero), numTimeSegments-1.0f);
    ftime = timeScaled - itimef;
    return vint<N>(itimef);
  }

  template<int N>
    __forceinline vint<N> getTimeSegment(const vfloat<N>& time, const vfloat<N>& start_time, const vfloat<N>& end_time, const vfloat<N>& numTimeSegments, vfloat<N>& ftime)
  {
    const vfloat<N> timeScaled = (time-start_time)/(end_time-start_time) * numTimeSegments;
    const vfloat<N> itimef = clamp(floor(timeScaled), vfloat<N>(zero), numTimeSegments-1.0f);
    ftime = timeScaled - itimef;
    return vint<N>(itimef);
  }

  /* calculate overlapping time segment range */
  __forceinline range<int> getTimeSegmentRange(const BBox1f& time_range, float numTimeSegments)
  {
    const float round_up   = 1.0f+2.0f*float(ulp); // corrects inaccuracies to precisely match time step
    const float round_down = 1.0f-2.0f*float(ulp);
    const int itime_lower = (int)max(floor(round_up  *time_range.lower*numTimeSegments), 0.0f);
    const int itime_upper = (int)min(ceil (round_down*time_range.upper*numTimeSegments), numTimeSegments);
    return make_range(itime_lower, itime_upper);
  }

  /* calculate overlapping time segment range */
  __forceinline range<int> getTimeSegmentRange(const BBox1f& range, BBox1f time_range, float numTimeSegments)
  {
    const float lower = (range.lower-time_range.lower)/time_range.size();
    const float upper = (range.upper-time_range.lower)/time_range.size();
    return getTimeSegmentRange(BBox1f(lower,upper),numTimeSegments);
  }
}
