#include "kernel_simple_radial_split_fixed_pose_fixed_principal_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)
    SimpleRadialSplitFixedPoseFixedPrincipalPointJtjnjtrDirectKernel(
        float* focal_and_extra_njtr,
        unsigned int focal_and_extra_njtr_num_alloc,
        SharedIndex* focal_and_extra_njtr_indices,
        float* focal_and_extra_jac,
        unsigned int focal_and_extra_jac_num_alloc,
        float* point_njtr,
        unsigned int point_njtr_num_alloc,
        SharedIndex* point_njtr_indices,
        float* point_jac,
        unsigned int point_jac_num_alloc,
        float* const out_focal_and_extra_njtr,
        unsigned int out_focal_and_extra_njtr_num_alloc,
        float* const out_point_njtr,
        unsigned int out_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 focal_and_extra_njtr_indices_loc[1024];
  focal_and_extra_njtr_indices_loc[threadIdx.x] =
      (global_thread_idx < problem_size
           ? focal_and_extra_njtr_indices[global_thread_idx]
           : SharedIndex{0xffffffff, 0xffff, 0xffff});

  __shared__ SharedIndex point_njtr_indices_loc[1024];
  point_njtr_indices_loc[threadIdx.x] =
      (global_thread_idx < problem_size
           ? 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;

  if (global_thread_idx < problem_size) {
    ReadIdx4<1024, float, float, float4>(focal_and_extra_jac,
                                         0 * focal_and_extra_jac_num_alloc,
                                         global_thread_idx,
                                         r0,
                                         r1,
                                         r2,
                                         r3);
  };
  LoadShared<3, float, float>(point_njtr,
                              0 * point_njtr_num_alloc,
                              point_njtr_indices_loc,
                              (float*)inout_shared);
  if (global_thread_idx < problem_size) {
    ReadShared3<float>((float*)inout_shared,
                       point_njtr_indices_loc[threadIdx.x].target,
                       r4,
                       r5,
                       r6);
  };
  __syncthreads();
  if (global_thread_idx < problem_size) {
    ReadIdx2<1024, float, float, float2>(
        point_jac, 4 * point_jac_num_alloc, global_thread_idx, r7, r8);
    ReadIdx4<1024, float, float, float4>(point_jac,
                                         0 * point_jac_num_alloc,
                                         global_thread_idx,
                                         r9,
                                         r10,
                                         r11,
                                         r12);
    r13 = fmaf(r5, r11, r6 * r7);
    r13 = fmaf(r4, r9, r13);
    r5 = fmaf(r5, r12, r6 * r8);
    r5 = fmaf(r4, r10, r5);
    r4 = fmaf(r1, r5, r0 * r13);
    r5 = fmaf(r3, r5, r2 * r13);
    WriteSum2<float, float>((float*)inout_shared, r4, r5);
  };
  FlushSumShared<2, float>(out_focal_and_extra_njtr,
                           0 * out_focal_and_extra_njtr_num_alloc,
                           focal_and_extra_njtr_indices_loc,
                           (float*)inout_shared);
  LoadShared<2, float, float>(focal_and_extra_njtr,
                              0 * focal_and_extra_njtr_num_alloc,
                              focal_and_extra_njtr_indices_loc,
                              (float*)inout_shared);
  if (global_thread_idx < problem_size) {
    ReadShared2<float>((float*)inout_shared,
                       focal_and_extra_njtr_indices_loc[threadIdx.x].target,
                       r5,
                       r4);
  };
  __syncthreads();
  if (global_thread_idx < problem_size) {
    r2 = fmaf(r4, r2, r5 * r0);
    r3 = fmaf(r4, r3, r5 * r1);
    r10 = fmaf(r10, r3, r9 * r2);
    r12 = fmaf(r12, r3, r11 * r2);
    r3 = fmaf(r8, r3, r7 * r2);
    WriteSum3<float, float>((float*)inout_shared, r10, r12, r3);
  };
  FlushSumShared<3, float>(out_point_njtr,
                           0 * out_point_njtr_num_alloc,
                           point_njtr_indices_loc,
                           (float*)inout_shared);
}

void SimpleRadialSplitFixedPoseFixedPrincipalPointJtjnjtrDirect(
    float* focal_and_extra_njtr,
    unsigned int focal_and_extra_njtr_num_alloc,
    SharedIndex* focal_and_extra_njtr_indices,
    float* focal_and_extra_jac,
    unsigned int focal_and_extra_jac_num_alloc,
    float* point_njtr,
    unsigned int point_njtr_num_alloc,
    SharedIndex* point_njtr_indices,
    float* point_jac,
    unsigned int point_jac_num_alloc,
    float* const out_focal_and_extra_njtr,
    unsigned int out_focal_and_extra_njtr_num_alloc,
    float* const out_point_njtr,
    unsigned int out_point_njtr_num_alloc,
    size_t problem_size) {
  if (problem_size == 0) {
    return;
  }

  const int n_blocks = (problem_size + 1024 - 1) / 1024;
  SimpleRadialSplitFixedPoseFixedPrincipalPointJtjnjtrDirectKernel<<<n_blocks,
                                                                     1024>>>(
      focal_and_extra_njtr,
      focal_and_extra_njtr_num_alloc,
      focal_and_extra_njtr_indices,
      focal_and_extra_jac,
      focal_and_extra_jac_num_alloc,
      point_njtr,
      point_njtr_num_alloc,
      point_njtr_indices,
      point_jac,
      point_jac_num_alloc,
      out_focal_and_extra_njtr,
      out_focal_and_extra_njtr_num_alloc,
      out_point_njtr,
      out_point_njtr_num_alloc,
      problem_size);
}

}  // namespace caspar