# 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 IgnoreReasons, PassAutoScanTest
from program_config import OpConfig, ProgramConfig, TensorConfig


class TestSeqConcatFcFusePass(PassAutoScanTest):
    def is_program_valid(self, program_config: ProgramConfig) -> bool:
        return True

    def sample_program_config(self, draw):
        ref_level = draw(st.sampled_from([0]))
        axis1 = draw(st.sampled_from([1]))
        x_col = draw(st.sampled_from([1]))
        y_col = draw(st.sampled_from([1]))
        axis2 = draw(st.sampled_from([1]))
        use_cudnn = False
        use_mkldnn = False
        act_type = draw(st.sampled_from(["tanh", "sigmoid", "relu"]))
        batch_size = draw(st.integers(min_value=1, max_value=1))
        dim = draw(st.integers(min_value=1, max_value=1000))

        def generate_input(shape):
            return np.random.random(shape).astype(np.float32)

        def generate_weight(shape):
            return np.random.random(shape).astype(np.float32)

        sequence_expand_op1 = OpConfig(
            type="sequence_expand",
            inputs={"X": ["input_data1"], "Y": ["input_data2"]},
            outputs={"Out": ["seq_exp1_out"]},
            attrs={"ref_level": ref_level},
        )

        sequence_expand_op2 = OpConfig(
            type="sequence_expand",
            inputs={"X": ["input_data1"], "Y": ["input_data3"]},
            outputs={"Out": ["seq_exp2_out"]},
            attrs={"ref_level": ref_level},
        )

        concat_op = OpConfig(
            type="concat",
            inputs={"X": ["input_data1", "seq_exp1_out", "seq_exp2_out"]},
            outputs={"Out": ["concat_output"]},
            attrs={'axis': axis1},
        )

        mul_op = OpConfig(
            type="mul",
            inputs={"X": ["concat_output"], "Y": ["mul_weight"]},
            outputs={"Out": ["mul_out"]},
            attrs={"x_num_col_dims": x_col, "y_num_col_dims": y_col},
        )

        elt_op = OpConfig(
            type="elementwise_add",
            inputs={"X": ["mul_out"], "Y": ["elt_weight"]},
            outputs={"Out": ["elt_out"]},
            attrs={"axis": axis2},
        )

        act_op = OpConfig(
            type=act_type,
            inputs={"X": ["elt_out"]},
            outputs={"Out": ["act_out"]},
            attrs={"use_cudnn": use_cudnn, "use_mkldnn": use_mkldnn},
        )

        model_net = [
            sequence_expand_op1,
            sequence_expand_op2,
            concat_op,
            mul_op,
            elt_op,
            act_op,
        ]

        program_config = ProgramConfig(
            ops=model_net,
            weights={
                "mul_weight": TensorConfig(
                    data_gen=partial(generate_weight, [384, dim])
                ),
                "elt_weight": TensorConfig(
                    data_gen=partial(generate_weight, [dim])
                ),
            },
            inputs={
                "input_data1": TensorConfig(
                    data_gen=partial(generate_input, [batch_size, 128]),
                    lod=[[0, 1]],
                ),
                "input_data2": TensorConfig(
                    data_gen=partial(generate_input, [batch_size, 128]),
                    lod=[[0, 1]],
                ),
                "input_data3": TensorConfig(
                    data_gen=partial(generate_input, [batch_size, 128]),
                    lod=[[0, 1]],
                ),
            },
            outputs=["act_out"],
        )

        return program_config

    def sample_predictor_configs(self, program_config):
        config = self.create_inference_config()
        yield config, ["fusion_seqexpand_concat_fc"], (1e-5, 1e-5)

    def add_ignore_pass_case(self):
        def teller1(program_config, predictor_config):
            if program_config.ops[-1].type == "relu":
                return True
            return False

        self.add_ignore_check_case(
            teller1,
            IgnoreReasons.PASS_ACCURACY_ERROR,
            "The pass output has diff in a specific case. We need to fix it as soon as possible.",
        )

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


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