import importlib
import os.path as osp

import torch

from .scatter import (scatter_sum, scatter_add, scatter_mean, scatter_min,
                      scatter_max, scatter)
from .segment_csr import (segment_sum_csr, segment_add_csr, segment_mean_csr,
                          segment_min_csr, segment_max_csr, segment_csr,
                          gather_csr)
from .segment_coo import (segment_sum_coo, segment_add_coo, segment_mean_coo,
                          segment_min_coo, segment_max_coo, segment_coo,
                          gather_coo)
from .composite import (scatter_std, scatter_logsumexp, scatter_softmax,
                        scatter_log_softmax)

torch.ops.load_library(importlib.machinery.PathFinder().find_spec(
    '_version', [osp.dirname(__file__)]).origin)
cuda_version = torch.ops.torch_scatter.cuda_version()

if cuda_version != -1 and torch.version.cuda is not None:  # pragma: no cover
    if cuda_version < 10000:
        major, minor = int(str(cuda_version)[0]), int(str(cuda_version)[2])
    else:
        major, minor = int(str(cuda_version)[0:2]), int(str(cuda_version)[3])
    t_major, t_minor = [int(x) for x in torch.version.cuda.split('.')]
    cuda_version = str(major) + '.' + str(minor)

    if t_major != major or t_minor != minor:
        raise RuntimeError(
            'Detected that PyTorch and torch_scatter were compiled with '
            'different CUDA versions. PyTorch has CUDA version={}.{} and '
            'torch_scatter has CUDA version={}.{}. Please reinstall the '
            'torch_scatter that matches your PyTorch install.'.format(
                t_major, t_minor, major, minor))
else:
    cuda_version = None

__version__ = '2.0.3'

__all__ = [
    'scatter_sum',
    'scatter_add',
    'scatter_mean',
    'scatter_min',
    'scatter_max',
    'scatter',
    'segment_sum_csr',
    'segment_add_csr',
    'segment_mean_csr',
    'segment_min_csr',
    'segment_max_csr',
    'segment_csr',
    'gather_csr',
    'segment_sum_coo',
    'segment_add_coo',
    'segment_mean_coo',
    'segment_min_coo',
    'segment_max_coo',
    'segment_coo',
    'gather_coo',
    'scatter_std',
    'scatter_logsumexp',
    'scatter_softmax',
    'scatter_log_softmax',
    'torch_scatter',
    'cuda_version',
    '__version__',
]