import numpy as np

from .utils import is_duck_array

integer_types = (int, np.integer)

try:
    import dask.array
    from dask.base import is_dask_collection

    # solely for isinstance checks
    dask_array_type = (dask.array.Array,)

    def is_duck_dask_array(x):
        return is_duck_array(x) and is_dask_collection(x)


except ImportError:  # pragma: no cover
    dask_array_type = ()
    is_duck_dask_array = lambda _: False
    is_dask_collection = lambda _: False

try:
    # solely for isinstance checks
    import sparse

    sparse_array_type = (sparse.COO,)
except ImportError:  # pragma: no cover
    try:
        import scipy.sparse
        sparse_array_type = (scipy.sparse.coo_matrix,)
    except ImportError:  # pragma: no cover
        sparse_array_type = ()

try:
    # solely for isinstance checks
    import cupy

    cupy_array_type = (cupy.ndarray,)
except ImportError:  # pragma: no cover
    cupy_array_type = ()