# pragma pylint: disable=missing-docstring,C0103
import argparse
import json
import time
from copy import deepcopy
from unittest.mock import MagicMock

import datetime
import pytest
from jsonschema import ValidationError
from freqtrade.analyze import parse_ticker_dataframe
from freqtrade.misc import (common_args_parser, file_dump_json, load_config,
                            parse_args, parse_timerange, throttle, datesarray_to_datetimearray)


def test_throttle():

    def func():
        return 42

    start = time.time()
    result = throttle(func, min_secs=0.1)
    end = time.time()

    assert result == 42
    assert end - start > 0.1

    result = throttle(func, min_secs=-1)
    assert result == 42


def test_throttle_with_assets():

    def func(nb_assets=-1):
        return nb_assets

    result = throttle(func, min_secs=0.1, nb_assets=666)
    assert result == 666

    result = throttle(func, min_secs=0.1)
    assert result == -1


# Parse common command-line-arguments. Used for all tools

def test_parse_args_none():
    args = common_args_parser('')
    assert isinstance(args, argparse.ArgumentParser)


def test_parse_args_defaults():
    args = parse_args([], '')
    assert args.config == 'config.json'
    assert args.dynamic_whitelist is None
    assert args.loglevel == 20


def test_parse_args_config():
    args = parse_args(['-c', '/dev/null'], '')
    assert args.config == '/dev/null'

    args = parse_args(['--config', '/dev/null'], '')
    assert args.config == '/dev/null'


def test_parse_args_verbose():
    args = parse_args(['-v'], '')
    assert args.loglevel == 10

    args = parse_args(['--verbose'], '')
    assert args.loglevel == 10


def test_parse_args_version():
    with pytest.raises(SystemExit, match=r'0'):
        parse_args(['--version'], '')


def test_parse_args_invalid():
    with pytest.raises(SystemExit, match=r'2'):
        parse_args(['-c'], '')


# Parse command-line-arguments
# used for main, backtesting and hyperopt


def test_parse_args_dynamic_whitelist():
    args = parse_args(['--dynamic-whitelist'], '')
    assert args.dynamic_whitelist == 20


def test_parse_args_dynamic_whitelist_10():
    args = parse_args(['--dynamic-whitelist', '10'], '')
    assert args.dynamic_whitelist == 10


def test_parse_args_dynamic_whitelist_invalid_values():
    with pytest.raises(SystemExit, match=r'2'):
        parse_args(['--dynamic-whitelist', 'abc'], '')


def test_parse_args_backtesting_invalid():
    with pytest.raises(SystemExit, match=r'2'):
        parse_args(['backtesting --ticker-interval'], '')

    with pytest.raises(SystemExit, match=r'2'):
        parse_args(['backtesting --ticker-interval', 'abc'], '')


def test_parse_args_backtesting_custom():
    args = [
        '-c', 'test_conf.json',
        'backtesting',
        '--live',
        '--ticker-interval', '1',
        '--refresh-pairs-cached']
    call_args = parse_args(args, '')
    assert call_args.config == 'test_conf.json'
    assert call_args.live is True
    assert call_args.loglevel == 20
    assert call_args.subparser == 'backtesting'
    assert call_args.func is not None
    assert call_args.ticker_interval == 1
    assert call_args.refresh_pairs is True


def test_parse_args_hyperopt_custom():
    args = ['-c', 'test_conf.json', 'hyperopt', '--epochs', '20']
    call_args = parse_args(args, '')
    assert call_args.config == 'test_conf.json'
    assert call_args.epochs == 20
    assert call_args.loglevel == 20
    assert call_args.subparser == 'hyperopt'
    assert call_args.func is not None


def test_file_dump_json(mocker):
    file_open = mocker.patch('freqtrade.misc.open', MagicMock())
    json_dump = mocker.patch('json.dump', MagicMock())
    file_dump_json('somefile', [1, 2, 3])
    assert file_open.call_count == 1
    assert json_dump.call_count == 1


def test_parse_timerange_incorrect():
    assert ((None, 'line'), None, -200) == parse_timerange('-200')
    assert (('line', None), 200, None) == parse_timerange('200-')
    with pytest.raises(Exception, match=r'Incorrect syntax.*'):
        parse_timerange('-')


def test_load_config(default_conf, mocker):
    file_mock = mocker.patch('freqtrade.misc.open', mocker.mock_open(
        read_data=json.dumps(default_conf)
    ))
    validated_conf = load_config('somefile')
    assert file_mock.call_count == 1
    assert validated_conf.items() >= default_conf.items()


def test_load_config_invalid_pair(default_conf, mocker):
    conf = deepcopy(default_conf)
    conf['exchange']['pair_whitelist'].append('BTC-ETH')
    mocker.patch(
        'freqtrade.misc.open',
        mocker.mock_open(
            read_data=json.dumps(conf)))
    with pytest.raises(ValidationError, match=r'.*does not match.*'):
        load_config('somefile')


def test_load_config_missing_attributes(default_conf, mocker):
    conf = deepcopy(default_conf)
    conf.pop('exchange')
    mocker.patch(
        'freqtrade.misc.open',
        mocker.mock_open(
            read_data=json.dumps(conf)))
    with pytest.raises(ValidationError, match=r'.*\'exchange\' is a required property.*'):
        load_config('somefile')


def test_datesarray_to_datetimearray(ticker_history):
    dataframes = parse_ticker_dataframe(ticker_history)
    dates = datesarray_to_datetimearray(dataframes['date'])

    assert isinstance(dates[0], datetime.datetime)
    assert dates[0].year == 2017
    assert dates[0].month == 11
    assert dates[0].day == 26
    assert dates[0].hour == 8
    assert dates[0].minute == 50

    date_len = len(dates)
    assert date_len == 3