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"""Example code to do convolution."""
import pytest
import numpy as np

import tvm
from tvm import te
from tvm import autotvm
from tvm.autotvm.task.space import FallbackConfigEntity
import topi
import topi.testing
from tvm.contrib.pickle_memoize import memoize
from topi.util import get_const_tuple


def verify_conv2d_1x1_nhwc_pack_int8(batch, in_channel, in_size, num_filter, kernel, stride, padding, dilation=1):
    in_height = in_width = in_size

    A = te.placeholder((batch, in_height, in_width, in_channel), name='A', dtype='uint8')
    W = te.placeholder((kernel, kernel, in_channel, num_filter), name='W', dtype='int8')

    a_shape = get_const_tuple(A.shape)
    w_shape = get_const_tuple(W.shape)
    adtype = A.dtype
    wdtype = W.dtype

    @memoize("topi.tests.test_topi_conv2d_1x1_nhwc_pack_int8.verify_nhwc.v2")
    def get_ref_data():
        a_np = np.random.uniform(size=a_shape).astype(adtype)
        w_np = np.random.uniform(size=w_shape).astype(wdtype)
        dw_np = topi.testing.dilate_python(w_np, (dilation, dilation, 1, 1))
        b_np = topi.testing.conv2d_nhwc_python(a_np, dw_np, stride, padding)
        return a_np, w_np, b_np

    a_np, w_np, b_np = get_ref_data()

    def check_device(device):
        ctx = tvm.context(device, 0)
        if not ctx.exist:
            print("Skip because %s is not enabled" % device)
            return
        print("Running on target: %s" % device)

        with tvm.target.create(device):
            B = topi.nn.conv2d(A, W, stride, padding, dilation, layout='NHWC', out_dtype="int32")
            s = topi.x86.schedule_conv2d_nhwc_pack_int8([B])
        a = tvm.nd.array(a_np, ctx)
        w = tvm.nd.array(w_np, ctx)
        b = tvm.nd.array(np.zeros(get_const_tuple(B.shape), dtype=B.dtype), ctx)
        func = tvm.build(s, [A, W, B], device)
        func(a, w, b)
        tvm.testing.assert_allclose(b.asnumpy(), b_np, rtol=1e-5)

    # for device in ['llvm -mcpu=skylake-avx512']:
    for device in ['llvm']:
        check_device(device)


# TODO(@llyfacebook): Please fix https://github.com/apache/incubator-tvm/issues/4122 to enable this test.
@pytest.mark.skip
def test_conv2d_nhwc():
    verify_conv2d_1x1_nhwc_pack_int8(1, 256, 32, 256, 1, 1, 0)


if __name__ == "__main__":
    # test_conv2d_nhwc()
    pass
