from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals

import numpy as np  # type: ignore

import onnx
from ..base import Base
from . import expect
from ..utils import all_numeric_dtypes


class Max(Base):

    @staticmethod
    def export():  # type: () -> None
        data_0 = np.array([3, 2, 1]).astype(np.float32)
        data_1 = np.array([1, 4, 4]).astype(np.float32)
        data_2 = np.array([2, 5, 3]).astype(np.float32)
        result = np.array([3, 5, 4]).astype(np.float32)
        node = onnx.helper.make_node(
            'Max',
            inputs=['data_0', 'data_1', 'data_2'],
            outputs=['result'],
        )
        expect(node, inputs=[data_0, data_1, data_2], outputs=[result],
               name='test_max_example')

        node = onnx.helper.make_node(
            'Max',
            inputs=['data_0'],
            outputs=['result'],
        )
        expect(node, inputs=[data_0], outputs=[data_0],
               name='test_max_one_input')

        result = np.maximum(data_0, data_1)
        node = onnx.helper.make_node(
            'Max',
            inputs=['data_0', 'data_1'],
            outputs=['result'],
        )
        expect(node, inputs=[data_0, data_1], outputs=[result],
               name='test_max_two_inputs')

    @staticmethod
    def export_max_all_numeric_types():  # type: () -> None
        for op_dtype in all_numeric_dtypes:
            data_0 = np.array([3, 2, 1]).astype(op_dtype)
            data_1 = np.array([1, 4, 4]).astype(op_dtype)
            result = np.array([3, 4, 4]).astype(op_dtype)
            node = onnx.helper.make_node(
                'Max',
                inputs=['data_0', 'data_1'],
                outputs=['result'],
            )
            expect(node, inputs=[data_0, data_1], outputs=[result],
                   name='test_max_{0}'.format(np.dtype(op_dtype).name))
