# Copyright (c) 2022 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 os
import unittest
from functools import partial
from typing import List

import numpy as np
from program_config import ProgramConfig, TensorConfig
from trt_layer_auto_scan_test import TrtLayerAutoScanTest

import paddle.inference as paddle_infer


class TrtConvertSliceTest(TrtLayerAutoScanTest):
    def is_program_valid(self, program_config: ProgramConfig) -> bool:
        return True

    def sample_program_configs(self):
        self.trt_param.workspace_size = 1073741824
        for hidden_size in [30]:
            for input_size in [30]:
                for batch in [2]:
                    for seq_len in [5]:
                        for num_layers in [1, 2]:
                            for is_bidirec in [True, False]:
                                dics = []
                                dics.append(
                                    {
                                        "hidden_size": hidden_size,
                                        "input_size": input_size,
                                        "num_layers": num_layers,
                                        "mode": "LSTM",
                                        "is_bidirec": is_bidirec,
                                        "is_test": True,
                                        "dropout_prob": 0.0,
                                        # for my convience
                                        "batch": batch,
                                        "seq_len": seq_len,
                                    }
                                )

                                K = 1
                                if dics[0]["is_bidirec"]:
                                    K = 2

                                def generate_input1():
                                    return (
                                        np.random.random(
                                            [batch, seq_len, input_size]
                                        ).astype(np.float32)
                                        * 2
                                        - 1
                                    )

                                # initial input -> hidden
                                def generate_w0():
                                    return (
                                        np.random.random(
                                            [4 * hidden_size, input_size]
                                        ).astype(np.float32)
                                        * 2
                                        - 1
                                    )

                                # prev layer's output -> hidden
                                def generate_w1():
                                    return (
                                        np.random.random(
                                            [4 * hidden_size, K * hidden_size]
                                        ).astype(np.float32)
                                        * 2
                                        - 1
                                    )

                                #
                                def generate_w2():
                                    return (
                                        np.random.random(
                                            [4 * hidden_size, hidden_size]
                                        ).astype(np.float32)
                                        * 2
                                        - 1
                                    )

                                def generate_b():
                                    return (
                                        np.random.random(
                                            [4 * hidden_size]
                                        ).astype(np.float32)
                                        * 2
                                        - 1
                                    )

                                dics.append(
                                    {
                                        "dtype": 5,
                                        "input_dim_idx": 0,
                                        "str_value": "",
                                        "value": 0.0,
                                        "shape": [
                                            K * num_layers,
                                            -1,
                                            hidden_size,
                                        ],
                                        "output_dim_idx": 1,
                                    }
                                )
                                dics.append({"axis": [1, 0, 2]})
                                # set  weights
                                WeightList = [
                                    "weight" + str(i)
                                    for i in range(
                                        4 * K * dics[0]["num_layers"]
                                    )
                                ]
                                weights = {}
                                for i in range((int)(len(WeightList) / 2)):
                                    # mean this weight : input->hidden
                                    # input has 2 case: initial input input_size, K * hidden form the prev layer.
                                    if i % 2 == 0:
                                        if i <= K:
                                            weights[
                                                WeightList[i]
                                            ] = TensorConfig(
                                                data_gen=partial(generate_w0)
                                            )
                                        else:
                                            weights[
                                                WeightList[i]
                                            ] = TensorConfig(
                                                data_gen=partial(generate_w1)
                                            )
                                    # mean this weight : hidden->hidden
                                    if i % 2 == 1:
                                        weights[WeightList[i]] = TensorConfig(
                                            data_gen=partial(generate_w2)
                                        )
                                for i in range(
                                    (int)(len(WeightList) / 2), len(WeightList)
                                ):
                                    weights[WeightList[i]] = TensorConfig(
                                        data_gen=partial(generate_b)
                                    )
                                ops_config = [
                                    {
                                        "op_type": "fill_constant_batch_size_like",
                                        "op_inputs": {"Input": ["input_data"]},
                                        "op_outputs": {"Out": ["prestate1"]},
                                        "op_attrs": dics[1],
                                    },
                                    {
                                        "op_type": "fill_constant_batch_size_like",
                                        "op_inputs": {"Input": ["input_data"]},
                                        "op_outputs": {"Out": ["prestate2"]},
                                        "op_attrs": dics[1],
                                    },
                                    {
                                        "op_type": "transpose2",
                                        "op_inputs": {"X": ["input_data"]},
                                        "op_outputs": {
                                            "Out": ["rnn_input_data"]
                                        },
                                        "op_attrs": dics[2],
                                    },
                                    {
                                        "op_type": "rnn",
                                        "op_inputs": {
                                            "Input": ["rnn_input_data"],
                                            # prev_c, prev_h
                                            "PreState": [
                                                "prestate1",
                                                "prestate2",
                                            ],
                                            "WeightList": WeightList,
                                        },
                                        "op_outputs": {
                                            "Out": ["rnn_output_data"],
                                            "State": [
                                                "state_output_data0",
                                                "state_output_data1",
                                            ],
                                            "Reserve": ["reserve_data"],
                                            "DropoutState": [
                                                "DropoutState_data"
                                            ],
                                        },
                                        "op_attrs": dics[0],
                                    },
                                ]
                                ops = self.generate_op_config(ops_config)

                                program_config = ProgramConfig(
                                    ops=ops,
                                    weights=weights,
                                    inputs={
                                        "input_data": TensorConfig(
                                            data_gen=partial(generate_input1)
                                        )
                                    },
                                    outputs=["rnn_output_data"],
                                )

                                yield program_config

    def sample_predictor_configs(
        self, program_config
    ) -> (paddle_infer.Config, List[int], float):
        attrs = [
            program_config.ops[i].attrs for i in range(len(program_config.ops))
        ]
        num_layers = attrs[3]["num_layers"]
        hidden_size = attrs[3]["hidden_size"]
        batch = attrs[3]["batch"]
        input_size = attrs[3]["input_size"]
        seq_len = attrs[3]["seq_len"]

        K = 1
        if attrs[3]["is_bidirec"]:
            K = 2

        def generate_dynamic_shape(attrs):
            self.dynamic_shape.min_input_shape = {
                "input_data": [batch - 1, seq_len, input_size],
            }
            self.dynamic_shape.max_input_shape = {
                "input_data": [batch + 1, seq_len, input_size],
            }
            self.dynamic_shape.opt_input_shape = {
                "input_data": [batch, seq_len, input_size],
            }

        def clear_dynamic_shape():
            self.dynamic_shape.min_input_shape = {}
            self.dynamic_shape.max_input_shape = {}
            self.dynamic_shape.opt_input_shape = {}

        def generate_trt_nodes_num(attrs, dynamic_shape):
            return 1, 2

        attrs = [
            program_config.ops[i].attrs for i in range(len(program_config.ops))
        ]

        # The output has diff between gpu and trt in PR-CI-Windows-Inference
        tol_fp32 = 1e-5
        tol_half = 1e-2
        if os.name == 'nt':
            tol_fp32 = 1e-2
            tol_half = 1e-1

        # for dynamic_shape
        generate_dynamic_shape(attrs)
        self.trt_param.precision = paddle_infer.PrecisionType.Float32
        yield self.create_inference_config(), generate_trt_nodes_num(
            attrs, True
        ), tol_fp32
        self.trt_param.precision = paddle_infer.PrecisionType.Half
        yield self.create_inference_config(), generate_trt_nodes_num(
            attrs, True
        ), tol_half

    def test(self):
        self.run_test()


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