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

import pytest
from jsonschema import ValidationError

from freqtrade.misc import throttle, parse_args, load_config


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


def test_parse_args_defaults():
    args = parse_args([], '')
    assert args is not None
    assert args.config == 'config.json'
    assert args.dynamic_whitelist is None
    assert args.loglevel == 20


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


def test_parse_args_config():
    args = parse_args(['-c', '/dev/null'], '')
    assert args is not None
    assert args.config == '/dev/null'

    args = parse_args(['--config', '/dev/null'], '')
    assert args is not None
    assert args.config == '/dev/null'


def test_parse_args_verbose():
    args = parse_args(['-v'], '')
    assert args is not None
    assert args.loglevel == 10


def test_parse_args_dynamic_whitelist():
    args = parse_args(['--dynamic-whitelist'], '')
    assert args is not None
    assert args.dynamic_whitelist is 20


def test_parse_args_dynamic_whitelist_10():
    args = parse_args(['--dynamic-whitelist', '10'], '')
    assert args is not None
    assert args.dynamic_whitelist is 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(mocker):
    backtesting_mock = mocker.patch(
        'freqtrade.optimize.backtesting.start', MagicMock())
    args = parse_args(['backtesting'], '')
    assert args is None
    assert backtesting_mock.call_count == 1

    call_args = backtesting_mock.call_args[0][0]
    assert call_args.config == 'config.json'
    assert call_args.live is False
    assert call_args.loglevel == 20
    assert call_args.subparser == 'backtesting'
    assert call_args.func is not None
    assert call_args.ticker_interval == 5


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(mocker):
    backtesting_mock = mocker.patch(
        'freqtrade.optimize.backtesting.start', MagicMock())
    args = parse_args([
        '-c', 'test_conf.json',
        'backtesting',
        '--live',
        '--ticker-interval', '1',
        '--refresh-pairs-cached'], '')
    assert args is None
    assert backtesting_mock.call_count == 1

    call_args = backtesting_mock.call_args[0][0]
    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(mocker):
    hyperopt_mock = mocker.patch(
        'freqtrade.optimize.hyperopt.start', MagicMock())
    args = parse_args(['hyperopt'], '')
    assert args is None
    assert hyperopt_mock.call_count == 1

    call_args = hyperopt_mock.call_args[0][0]
    assert call_args.config == 'config.json'
    assert call_args.loglevel == 20
    assert call_args.subparser == 'hyperopt'
    assert call_args.func is not None


def test_parse_args_hyperopt_custom(mocker):
    hyperopt_mock = mocker.patch(
        'freqtrade.optimize.hyperopt.start', MagicMock())
    args = parse_args(['-c', 'test_conf.json', 'hyperopt', '--epochs', '20'], '')
    assert args is None
    assert hyperopt_mock.call_count == 1

    call_args = hyperopt_mock.call_args[0][0]
    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_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')