import torch
import torch.nn as nn


class MPJPELoss(nn.Module):
    """MPJPE (Mean Per Joint Position Error) loss.

    Args:
        use_target_weight (bool): Option to use weighted MSE loss.
            Different joint types may have different target weights.
        loss_weight (float): Weight of the loss. Default: 1.0.
    """

    def __init__(self, use_target_weight=False, loss_weight=1.0):
        super().__init__()
        self.use_target_weight = use_target_weight
        self.loss_weight = loss_weight

    def forward(self, output, target, target_weight=None):
        """Forward function.

        Note:
            - batch_size: N
            - num_keypoints: K
            - dimension of keypoints: D (D=2 or D=3)

        Args:
            output (torch.Tensor[N, K, D]): Output regression.
            target (torch.Tensor[N, K, D]): Target regression.
            target_weight (torch.Tensor[N,K,D]):
                Weights across different joint types.
        """
        if self.use_target_weight:
            assert target_weight is not None
            loss = torch.mean(torch.norm((output - target) * target_weight,
                dim=-1))
        else:
            loss = torch.mean(torch.norm(output - target, dim=-1))
        return loss * self.loss_weight


def get_inputs():
    return [torch.rand([4, 4, 4, 4]), torch.rand([4, 4, 4, 4])]


def get_init_inputs():
    return [[], {}]

import torch
import triton
import triton.language as tl
from torch._inductor.runtime.triton_heuristics import grid
from torch._C import _cuda_getCurrentRawStream as get_raw_stream
from torch._inductor.runtime.triton_helpers import libdevice
import torch.nn as nn
assert_size_stride = torch._C._dynamo.guards.assert_size_stride
empty_strided_cuda = torch._C._dynamo.guards._empty_strided_cuda


@triton.jit
def triton_per_fused_linalg_vector_norm_mean_mul_sub_0(in_out_ptr0, in_ptr0,
    in_ptr1, xnumel, rnumel, XBLOCK: tl.constexpr):
    RBLOCK: tl.constexpr = 64
    xoffset = tl.program_id(0) * XBLOCK
    xoffset + tl.arange(0, XBLOCK)[:, None]
    tl.full([XBLOCK, RBLOCK], True, tl.int1)
    rindex = tl.arange(0, RBLOCK)[None, :]
    tl.full([XBLOCK, RBLOCK], True, tl.int1)
    r0 = rindex
    tmp0 = tl.load(in_ptr0 + 4 * r0, None, eviction_policy='evict_last')
    tmp1 = tl.load(in_ptr1 + 4 * r0, None, eviction_policy='evict_last')
    tmp4 = tl.load(in_ptr0 + (1 + 4 * r0), None, eviction_policy='evict_last')
    tmp5 = tl.load(in_ptr1 + (1 + 4 * r0), None, eviction_policy='evict_last')
    tmp9 = tl.load(in_ptr0 + (2 + 4 * r0), None, eviction_policy='evict_last')
    tmp10 = tl.load(in_ptr1 + (2 + 4 * r0), None, eviction_policy='evict_last')
    tmp14 = tl.load(in_ptr0 + (3 + 4 * r0), None, eviction_policy='evict_last')
    tmp15 = tl.load(in_ptr1 + (3 + 4 * r0), None, eviction_policy='evict_last')
    tmp2 = tmp0 - tmp1
    tmp3 = tmp2 * tmp2
    tmp6 = tmp4 - tmp5
    tmp7 = tmp6 * tmp6
    tmp8 = tmp3 + tmp7
    tmp11 = tmp9 - tmp10
    tmp12 = tmp11 * tmp11
    tmp13 = tmp8 + tmp12
    tmp16 = tmp14 - tmp15
    tmp17 = tmp16 * tmp16
    tmp18 = tmp13 + tmp17
    tmp19 = libdevice.sqrt(tmp18)
    tmp20 = tl.broadcast_to(tmp19, [XBLOCK, RBLOCK])
    tmp22 = tl.sum(tmp20, 1)[:, None]
    tmp23 = 64.0
    tmp24 = tmp22 / tmp23
    tmp25 = 1.0
    tmp26 = tmp24 * tmp25
    tl.debug_barrier()
    tl.store(in_out_ptr0 + tl.full([XBLOCK, 1], 0, tl.int32), tmp26, None)


def call(args):
    arg0_1, arg1_1 = args
    args.clear()
    assert_size_stride(arg0_1, (4, 4, 4, 4), (64, 16, 4, 1))
    assert_size_stride(arg1_1, (4, 4, 4, 4), (64, 16, 4, 1))
    with torch.cuda._DeviceGuard(0):
        torch.cuda.set_device(0)
        buf0 = empty_strided_cuda((), (), torch.float32)
        buf1 = buf0
        del buf0
        get_raw_stream(0)
        triton_per_fused_linalg_vector_norm_mean_mul_sub_0[grid(1)](buf1,
            arg0_1, arg1_1, 1, 64, XBLOCK=1, num_warps=2, num_stages=1)
        del arg0_1
        del arg1_1
    return buf1,


class MPJPELossNew(nn.Module):
    """MPJPE (Mean Per Joint Position Error) loss.

    Args:
        use_target_weight (bool): Option to use weighted MSE loss.
            Different joint types may have different target weights.
        loss_weight (float): Weight of the loss. Default: 1.0.
    """

    def __init__(self, use_target_weight=False, loss_weight=1.0):
        super().__init__()
        self.use_target_weight = use_target_weight
        self.loss_weight = loss_weight

    def forward(self, input_0, input_1):
        arg0_1 = input_0
        arg1_1 = input_1
        output = call([arg0_1, arg1_1])
        return output[0]
