# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import unittest
from functools import partial

import hypothesis.strategies as st
import numpy as np
from auto_scan_test import PassAutoScanTest
from program_config import OpConfig, ProgramConfig, TensorConfig


class TestMatmulv2TransposeReshapeMkldnnFusePass(PassAutoScanTest):
    def is_program_valid(self, program_config: ProgramConfig) -> bool:
        if (
            program_config.inputs["input_data1"].shape[-4] != 1
            and program_config.inputs["input_data2"].shape[-4] != 1
        ):
            if (
                program_config.inputs["input_data1"].shape[-4]
                != program_config.inputs["input_data2"].shape[-4]
            ):
                return False

        if (
            program_config.inputs["input_data1"].shape[-3] != 1
            and program_config.inputs["input_data2"].shape[-3] != 1
        ):
            if (
                program_config.inputs["input_data1"].shape[-3]
                != program_config.inputs["input_data2"].shape[-3]
            ):
                return False

        attrs = [
            program_config.ops[i].attrs for i in range(len(program_config.ops))
        ]
        # If the problem has been fixed, the judgment
        # needs to be deleted!!!
        if 0 in attrs[2]['shape']:
            return False

        return True

    def sample_program_config(self, draw):
        transpose_X = draw(st.booleans())
        transpose_Y = draw(st.booleans())
        axis = draw(st.sampled_from([[0, 2, 1, 3]]))
        shape = draw(st.sampled_from([[0, -1, 128], [-1, 1, 64], [1, -1, 32]]))
        batch_size1 = draw(st.integers(min_value=1, max_value=4))
        batch_size2 = draw(st.integers(min_value=1, max_value=4))
        channel1 = draw(st.sampled_from([1, 16, 32, 64]))
        channel2 = draw(st.sampled_from([1, 16, 32, 64]))
        input_dim = draw(st.sampled_from([16, 32, 64]))

        def generate_input(type):
            if transpose_X and transpose_Y:
                shape_x = [batch_size1, channel1, input_dim, 32]
                shape_y = [batch_size2, channel2, 64, input_dim]
            elif transpose_X:
                shape_x = [batch_size1, channel1, input_dim, 32]
                shape_y = [batch_size2, channel2, input_dim, 64]
            elif transpose_Y:
                shape_x = [batch_size1, channel1, 32, input_dim]
                shape_y = [batch_size2, channel2, 8, input_dim]
            else:
                shape_x = [batch_size1, channel1, 32, input_dim]
                shape_y = [batch_size2, channel2, input_dim, 16]

            if type == "x":
                return np.random.random(shape_x).astype(np.float32)
            else:
                return np.random.random(shape_y).astype(np.float32)

        matmul_op = OpConfig(
            type="matmul_v2",
            inputs={"X": ["input_data1"], "Y": ["input_data2"]},
            outputs={"Out": ["matmul_output"]},
            attrs={
                "trans_x": transpose_X,
                "trans_y": transpose_Y,
                "fused_reshape_X": [],
                "fused_reshape_Y": [],
                "fused_transpose_X": [],
                "fused_transpose_Y": [],
                "fused_reshape_Out": [],
                "fused_transpose_Out": [],
            },
        )

        transpose2_op = OpConfig(
            type="transpose2",
            inputs={"X": ["matmul_output"]},
            outputs={
                "Out": ["transpose2_output"],
                "XShape": ["transpose2_xshape"],
            },
            attrs={'axis': axis},
        )

        reshape2_op = OpConfig(
            type="reshape2",
            inputs={"X": ["transpose2_output"]},
            outputs={"Out": ["reshape2_output"], "XShape": ["reshape2_xshape"]},
            attrs={'shape': shape},
        )

        model_net = [matmul_op, transpose2_op, reshape2_op]

        program_config = ProgramConfig(
            ops=model_net,
            weights={},
            inputs={
                "input_data1": TensorConfig(
                    data_gen=partial(generate_input, "x")
                ),
                "input_data2": TensorConfig(
                    data_gen=partial(generate_input, "y")
                ),
            },
            outputs=["reshape2_output"],
        )

        return program_config

    def sample_predictor_configs(self, program_config):
        # gpu_cpu_map_matmul_v2_to_matmul_pass will affect the type of final fused op
        fused_op = "matmul_v2"
        input1_dim1 = program_config.inputs["input_data1"].shape[0]
        input2_dim1 = program_config.inputs["input_data2"].shape[0]
        input1_dim2 = program_config.inputs["input_data1"].shape[1]
        input2_dim2 = program_config.inputs["input_data2"].shape[1]
        if input1_dim1 == input2_dim1 and input1_dim2 == input2_dim2:
            fused_op = "matmul"

        config = self.create_inference_config(use_mkldnn=True)
        yield config, [fused_op], (1e-5, 1e-5)

    def test(self):
        self.run_and_statis(
            quant=False, passes=["matmul_transpose_reshape_mkldnn_fuse_pass"]
        )


if __name__ == "__main__":
    unittest.main()
