#include "kernel_simple_radial_split_fixed_focal_and_extra_fixed_point_jtjnjtr_direct.h"
#include "memops.cuh"
#include <cooperative_groups.h>
#include <cooperative_groups/details/partitioning.h>
#include <cooperative_groups/memcpy_async.h>
#include <cooperative_groups/reduce.h>
#include <cuda_runtime.h>

namespace cg = cooperative_groups;

namespace caspar {

__global__ void __launch_bounds__(1024, 1)
    SimpleRadialSplitFixedFocalAndExtraFixedPointJtjnjtrDirectKernel(
        float* pose_njtr,
        unsigned int pose_njtr_num_alloc,
        SharedIndex* pose_njtr_indices,
        float* pose_jac,
        unsigned int pose_jac_num_alloc,
        float* principal_point_njtr,
        unsigned int principal_point_njtr_num_alloc,
        SharedIndex* principal_point_njtr_indices,
        float* principal_point_jac,
        unsigned int principal_point_jac_num_alloc,
        float* const out_pose_njtr,
        unsigned int out_pose_njtr_num_alloc,
        float* const out_principal_point_njtr,
        unsigned int out_principal_point_njtr_num_alloc,
        size_t problem_size) {
  const int global_thread_idx = blockIdx.x * blockDim.x + threadIdx.x;
  __shared__ uint8_t inout_shared[16384];

  __shared__ SharedIndex pose_njtr_indices_loc[1024];
  pose_njtr_indices_loc[threadIdx.x] =
      (global_thread_idx < problem_size
           ? pose_njtr_indices[global_thread_idx]
           : SharedIndex{0xffffffff, 0xffff, 0xffff});

  __shared__ SharedIndex principal_point_njtr_indices_loc[1024];
  principal_point_njtr_indices_loc[threadIdx.x] =
      (global_thread_idx < problem_size
           ? principal_point_njtr_indices[global_thread_idx]
           : SharedIndex{0xffffffff, 0xffff, 0xffff});

  float r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15,
      r16;

  if (global_thread_idx < problem_size) {
    ReadIdx4<1024, float, float, float4>(
        pose_jac, 0 * pose_jac_num_alloc, global_thread_idx, r0, r1, r2, r3);
  };
  LoadShared<2, float, float>(principal_point_njtr,
                              0 * principal_point_njtr_num_alloc,
                              principal_point_njtr_indices_loc,
                              (float*)inout_shared);
  if (global_thread_idx < problem_size) {
    ReadShared2<float>((float*)inout_shared,
                       principal_point_njtr_indices_loc[threadIdx.x].target,
                       r4,
                       r5);
  };
  __syncthreads();
  if (global_thread_idx < problem_size) {
    r6 = fmaf(r1, r5, r0 * r4);
    r7 = fmaf(r3, r5, r2 * r4);
    ReadIdx4<1024, float, float, float4>(
        pose_jac, 4 * pose_jac_num_alloc, global_thread_idx, r8, r9, r10, r11);
    r12 = fmaf(r9, r5, r8 * r4);
    r13 = fmaf(r11, r5, r10 * r4);
    WriteSum4<float, float>((float*)inout_shared, r6, r7, r12, r13);
  };
  FlushSumShared<4, float>(out_pose_njtr,
                           0 * out_pose_njtr_num_alloc,
                           pose_njtr_indices_loc,
                           (float*)inout_shared);
  if (global_thread_idx < problem_size) {
    ReadIdx4<1024, float, float, float4>(
        pose_jac, 8 * pose_jac_num_alloc, global_thread_idx, r13, r12, r7, r6);
    r14 = fmaf(r12, r5, r13 * r4);
    r5 = fmaf(r6, r5, r7 * r4);
    WriteSum2<float, float>((float*)inout_shared, r14, r5);
  };
  FlushSumShared<2, float>(out_pose_njtr,
                           4 * out_pose_njtr_num_alloc,
                           pose_njtr_indices_loc,
                           (float*)inout_shared);
  LoadShared<2, float, float>(pose_njtr,
                              4 * pose_njtr_num_alloc,
                              pose_njtr_indices_loc,
                              (float*)inout_shared);
  if (global_thread_idx < problem_size) {
    ReadShared2<float>((float*)inout_shared,
                       pose_njtr_indices_loc[threadIdx.x].target,
                       r5,
                       r14);
  };
  __syncthreads();
  if (global_thread_idx < problem_size) {
    r13 = fmaf(r5, r13, r14 * r7);
  };
  LoadShared<4, float, float>(pose_njtr,
                              0 * pose_njtr_num_alloc,
                              pose_njtr_indices_loc,
                              (float*)inout_shared);
  if (global_thread_idx < problem_size) {
    ReadShared4<float>((float*)inout_shared,
                       pose_njtr_indices_loc[threadIdx.x].target,
                       r7,
                       r4,
                       r15,
                       r16);
  };
  __syncthreads();
  if (global_thread_idx < problem_size) {
    r13 = fmaf(r15, r8, r13);
    r13 = fmaf(r16, r10, r13);
    r13 = fmaf(r7, r0, r13);
    r13 = fmaf(r4, r2, r13);
    r11 = fmaf(r16, r11, r14 * r6);
    r11 = fmaf(r15, r9, r11);
    r11 = fmaf(r7, r1, r11);
    r11 = fmaf(r4, r3, r11);
    r11 = fmaf(r5, r12, r11);
    WriteSum2<float, float>((float*)inout_shared, r13, r11);
  };
  FlushSumShared<2, float>(out_principal_point_njtr,
                           0 * out_principal_point_njtr_num_alloc,
                           principal_point_njtr_indices_loc,
                           (float*)inout_shared);
}

void SimpleRadialSplitFixedFocalAndExtraFixedPointJtjnjtrDirect(
    float* pose_njtr,
    unsigned int pose_njtr_num_alloc,
    SharedIndex* pose_njtr_indices,
    float* pose_jac,
    unsigned int pose_jac_num_alloc,
    float* principal_point_njtr,
    unsigned int principal_point_njtr_num_alloc,
    SharedIndex* principal_point_njtr_indices,
    float* principal_point_jac,
    unsigned int principal_point_jac_num_alloc,
    float* const out_pose_njtr,
    unsigned int out_pose_njtr_num_alloc,
    float* const out_principal_point_njtr,
    unsigned int out_principal_point_njtr_num_alloc,
    size_t problem_size) {
  if (problem_size == 0) {
    return;
  }

  const int n_blocks = (problem_size + 1024 - 1) / 1024;
  SimpleRadialSplitFixedFocalAndExtraFixedPointJtjnjtrDirectKernel<<<n_blocks,
                                                                     1024>>>(
      pose_njtr,
      pose_njtr_num_alloc,
      pose_njtr_indices,
      pose_jac,
      pose_jac_num_alloc,
      principal_point_njtr,
      principal_point_njtr_num_alloc,
      principal_point_njtr_indices,
      principal_point_jac,
      principal_point_jac_num_alloc,
      out_pose_njtr,
      out_pose_njtr_num_alloc,
      out_principal_point_njtr,
      out_principal_point_njtr_num_alloc,
      problem_size);
}

}  // namespace caspar