# 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 csv
import zipfile
import tarfile
from typing import Iterable, Callable

import paddle
from ppfleetx.distributed.apis import env


@env.work_at_local_rank0
def unzip(zip_path, mode="r", out_dir=None, delete=False):
    with zipfile.ZipFile(zip_path, mode) as zip_ref:
        zip_ref.extractall(out_dir)

    if delete:
        os.remove(zip_path)


@env.work_at_local_rank0
def untar(tar_path, mode="r:gz", out_dir=None, delete=False):
    try:
        with tarfile.open(tar_path, 'r:gz') as f:
            f.extractall(out_dir)
    finally:
        if delete:
            os.remove(tar_path)


def parse_csv(path,
              skip_lines=0,
              delimiter=' ',
              quotechar='|',
              quoting=csv.QUOTE_NONE,
              map_funcs=None,
              filter_funcs=None):

    with open(path, newline='') as csvfile:
        data = []
        spamreader = csv.reader(
            csvfile, delimiter=delimiter, quotechar=quotechar, quoting=quoting)
        for idx, row in enumerate(spamreader):
            if idx < skip_lines:
                continue
            filter_flag = True
            if filter_funcs is not None:
                if isinstance(filter_funcs, Iterable):
                    for func in filter_funcs:
                        filter_flag = func(row)
                        if filter_flag is False:
                            break
                else:
                    assert isinstance(filter_funcs, Callable)
                    filter_flag = filter_funcs(row)
            if filter_flag is False:
                continue

            if map_funcs is not None:
                if isinstance(map_funcs, Iterable):
                    for func in map_funcs:
                        row = func(row)
                else:
                    assert isinstance(map_funcs, Callable)
                    row = map_funcs(row)
            data.append(row)
        return data
