# MIT License
#
# Copyright (c) 2018 Evgeny Medvedev, evge.medvedev@gmail.com
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.


import json

import click

from blockchainetl.file_utils import smart_open


@click.command(context_settings=dict(help_option_names=['-h', '--help']))
@click.option('-i', '--input', default='-', type=str, help='The input file. If not specified stdin is used.')
@click.option('-o', '--output', default='-', type=str, help='The output file. If not specified stdout is used.')
@click.option('-p', '--predicate', required=True, type=str,
              help='Predicate in Python code e.g. "item[\'is_erc20\']".')
def filter_items(input, output, predicate):
    eval_environment = globals()
    if 'datetime' in predicate:
        import datetime
        eval_environment['datetime'] = datetime
    """Filters given JSON lines file by predicate."""
    # TODO: Add support for CSV
    with smart_open(input, 'r') as input_file, smart_open(output, 'w') as output_file:
        for line in input_file:
            item = json.loads(line)
            if eval(predicate, eval_environment, {'item': item}):
                output_file.write(json.dumps(item) + '\n')
