# Copyright (c) ONNX Project Contributors
#
# SPDX-License-Identifier: Apache-2.0
from __future__ import annotations

import numpy as np

import onnx
from onnx.backend.test.case.base import Base
from onnx.backend.test.case.node import expect


def swish(x: np.ndarray, alpha: float) -> np.ndarray:
    return x * (1 / (1 + np.exp(-alpha * x)))


class Swish(Base):
    @staticmethod
    def export() -> None:
        node = onnx.helper.make_node(
            "Swish",
            inputs=["x"],
            outputs=["y"],
            alpha=1.0,  # pass alpha as attribute
        )

        x = np.array([3, 4, 5], dtype=np.float32)
        y = swish(x, alpha=1.0)

        expect(
            node,
            inputs=[x],
            outputs=[y],
            name="test_swish",
            opset_imports=[onnx.helper.make_opsetid("", 24)],
        )