# 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 argparse


def parse_args():
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--model_type", default="bert", type=str, help="Type of pre-trained model.")
    parser.add_argument(
        "--model_name_or_path",
        default="bert-base-uncased",
        type=str,
        help="Path to pre-trained model or shortcut name of model.",
    )
    parser.add_argument(
        "--output_dir",
        default="outputs",
        type=str,
        help="The output directory where the model predictions and checkpoints will be written. "
        "Default as `outputs`",
    )
    parser.add_argument(
        "--max_seq_length",
        default=128,
        type=int,
        help="The maximum total input sequence length after tokenization. Sequences longer "
        "than this will be truncated, sequences shorter will be padded.",
    )
    parser.add_argument("--batch_size", default=8, type=int, help="Batch size per GPU/CPU for training.")
    parser.add_argument("--learning_rate", default=5e-5, type=float, help="The initial learning rate for Adam.")
    parser.add_argument("--weight_decay", default=0.0, type=float, help="Weight decay if we apply some.")
    parser.add_argument("--adam_epsilon", default=1e-8, type=float, help="Epsilon for Adam optimizer.")
    parser.add_argument("--max_grad_norm", default=1.0, type=float, help="Max gradient norm.")
    parser.add_argument("--num_train_epochs", default=3, type=int, help="Total number of training epochs to perform.")
    parser.add_argument(
        "--max_steps",
        default=-1,
        type=int,
        help="If > 0: set total number of training steps to perform. Override num_train_epochs.",
    )
    parser.add_argument(
        "--warmup_proportion",
        default=0.0,
        type=float,
        help="Proportion of training steps to perform linear learning rate warmup for.",
    )
    parser.add_argument("--logging_steps", type=int, default=500, help="Log every X updates steps.")
    parser.add_argument("--save_steps", type=int, default=500, help="Save checkpoint every X updates steps.")
    parser.add_argument("--seed", type=int, default=42, help="random seed for initialization")
    parser.add_argument(
        "--device",
        choices=["cpu", "gpu", "mlu"],
        default="gpu",
        help="Select which device to train model, defaults to gpu.",
    )
    parser.add_argument(
        "--doc_stride",
        type=int,
        default=128,
        help="When splitting up a long document into chunks, how much stride to take between chunks.",
    )
    parser.add_argument(
        "--n_best_size",
        type=int,
        default=20,
        help="The total number of n-best predictions to generate in the nbest_predictions.json output file.",
    )
    parser.add_argument(
        "--null_score_diff_threshold",
        type=float,
        default=0.0,
        help="If null_score - best_non_null is greater than the threshold predict null.",
    )
    parser.add_argument("--max_query_length", type=int, default=64, help="Max query length.")
    parser.add_argument("--max_answer_length", type=int, default=30, help="Max answer length.")
    parser.add_argument(
        "--do_lower_case",
        action="store_false",
        help="Whether to lower case the input text. Should be True for uncased models and False for cased models.",
    )
    parser.add_argument("--verbose", action="store_true", help="Whether to output verbose log.")
    parser.add_argument(
        "--version_2_with_negative",
        action="store_true",
        help="If true, the SQuAD examples contain some that do not have an answer. If using squad v2.0, it should be set true.",
    )
    parser.add_argument("--do_train", action="store_true", help="Whether to train the model.")
    parser.add_argument("--do_predict", action="store_true", help="Whether to predict.")
    parser.add_argument("--use_amp", action="store_true", help="Whether to use AMP.")
    parser.add_argument("--scale_loss", type=float, default=2**15, help="The value of scale_loss for fp16.")
    args = parser.parse_args()
    return args
