# pragma pylint: disable=missing-docstring, C0103

"""
Unit test file for analyse.py
"""

import logging
from unittest.mock import MagicMock

import arrow
from pandas import DataFrame

from freqtrade.analyze import Analyze, SignalType
from freqtrade.arguments import TimeRange
from freqtrade.optimize.__init__ import load_tickerdata_file
from freqtrade.tests.conftest import get_patched_exchange, log_has

# Avoid to reinit the same object again and again
_ANALYZE = Analyze({'strategy': 'DefaultStrategy'})


def test_signaltype_object() -> None:
    """
    Test the SignalType object has the mandatory Constants
    :return: None
    """
    assert hasattr(SignalType, 'BUY')
    assert hasattr(SignalType, 'SELL')


def test_analyze_object() -> None:
    """
    Test the Analyze object has the mandatory methods
    :return: None
    """
    assert hasattr(Analyze, 'parse_ticker_dataframe')
    assert hasattr(Analyze, 'populate_indicators')
    assert hasattr(Analyze, 'populate_buy_trend')
    assert hasattr(Analyze, 'populate_sell_trend')
    assert hasattr(Analyze, 'analyze_ticker')
    assert hasattr(Analyze, 'get_signal')
    assert hasattr(Analyze, 'should_sell')
    assert hasattr(Analyze, 'min_roi_reached')
    assert hasattr(Analyze, 'stop_loss_reached')


def test_dataframe_correct_length(result):
    dataframe = Analyze.parse_ticker_dataframe(result)
    assert len(result.index) - 1 == len(dataframe.index)    # last partial candle removed


def test_dataframe_correct_columns(result):
    assert result.columns.tolist() == \
        ['date', 'open', 'high', 'low', 'close', 'volume']


def test_populates_buy_trend(result):
    # Load the default strategy for the unit test, because this logic is done in main.py
    dataframe = _ANALYZE.populate_buy_trend(_ANALYZE.populate_indicators(result))
    assert 'buy' in dataframe.columns


def test_populates_sell_trend(result):
    # Load the default strategy for the unit test, because this logic is done in main.py
    dataframe = _ANALYZE.populate_sell_trend(_ANALYZE.populate_indicators(result))
    assert 'sell' in dataframe.columns


def test_returns_latest_buy_signal(mocker, default_conf):
    mocker.patch('freqtrade.exchange.Exchange.get_ticker_history', return_value=MagicMock())
    exchange = get_patched_exchange(mocker, default_conf)
    mocker.patch.multiple(
        'freqtrade.analyze.Analyze',
        analyze_ticker=MagicMock(
            return_value=DataFrame([{'buy': 1, 'sell': 0, 'date': arrow.utcnow()}])
        )
    )
    assert _ANALYZE.get_signal(exchange, 'ETH/BTC', '5m') == (True, False)

    mocker.patch.multiple(
        'freqtrade.analyze.Analyze',
        analyze_ticker=MagicMock(
            return_value=DataFrame([{'buy': 0, 'sell': 1, 'date': arrow.utcnow()}])
        )
    )
    assert _ANALYZE.get_signal(exchange, 'ETH/BTC', '5m') == (False, True)


def test_returns_latest_sell_signal(mocker, default_conf):
    mocker.patch('freqtrade.exchange.Exchange.get_ticker_history', return_value=MagicMock())
    exchange = get_patched_exchange(mocker, default_conf)
    mocker.patch.multiple(
        'freqtrade.analyze.Analyze',
        analyze_ticker=MagicMock(
            return_value=DataFrame([{'sell': 1, 'buy': 0, 'date': arrow.utcnow()}])
        )
    )

    assert _ANALYZE.get_signal(exchange, 'ETH/BTC', '5m') == (False, True)

    mocker.patch.multiple(
        'freqtrade.analyze.Analyze',
        analyze_ticker=MagicMock(
            return_value=DataFrame([{'sell': 0, 'buy': 1, 'date': arrow.utcnow()}])
        )
    )
    assert _ANALYZE.get_signal(exchange, 'ETH/BTC', '5m') == (True, False)


def test_get_signal_empty(default_conf, mocker, caplog):
    caplog.set_level(logging.INFO)
    mocker.patch('freqtrade.exchange.Exchange.get_ticker_history', return_value=None)
    exchange = get_patched_exchange(mocker, default_conf)
    assert (False, False) == _ANALYZE.get_signal(exchange, 'foo', default_conf['ticker_interval'])
    assert log_has('Empty ticker history for pair foo', caplog.record_tuples)


def test_get_signal_exception_valueerror(default_conf, mocker, caplog):
    caplog.set_level(logging.INFO)
    mocker.patch('freqtrade.exchange.Exchange.get_ticker_history', return_value=1)
    exchange = get_patched_exchange(mocker, default_conf)
    mocker.patch.multiple(
        'freqtrade.analyze.Analyze',
        analyze_ticker=MagicMock(
            side_effect=ValueError('xyz')
        )
    )
    assert (False, False) == _ANALYZE.get_signal(exchange, 'foo', default_conf['ticker_interval'])
    assert log_has('Unable to analyze ticker for pair foo: xyz', caplog.record_tuples)


def test_get_signal_empty_dataframe(default_conf, mocker, caplog):
    caplog.set_level(logging.INFO)
    mocker.patch('freqtrade.exchange.Exchange.get_ticker_history', return_value=1)
    exchange = get_patched_exchange(mocker, default_conf)
    mocker.patch.multiple(
        'freqtrade.analyze.Analyze',
        analyze_ticker=MagicMock(
            return_value=DataFrame([])
        )
    )
    assert (False, False) == _ANALYZE.get_signal(exchange, 'xyz', default_conf['ticker_interval'])
    assert log_has('Empty dataframe for pair xyz', caplog.record_tuples)


def test_get_signal_old_dataframe(default_conf, mocker, caplog):
    caplog.set_level(logging.INFO)
    mocker.patch('freqtrade.exchange.Exchange.get_ticker_history', return_value=1)
    exchange = get_patched_exchange(mocker, default_conf)
    # default_conf defines a 5m interval. we check interval * 2 + 5m
    # this is necessary as the last candle is removed (partial candles) by default
    oldtime = arrow.utcnow().shift(minutes=-16)
    ticks = DataFrame([{'buy': 1, 'date': oldtime}])
    mocker.patch.multiple(
        'freqtrade.analyze.Analyze',
        analyze_ticker=MagicMock(
            return_value=DataFrame(ticks)
        )
    )
    assert (False, False) == _ANALYZE.get_signal(exchange, 'xyz', default_conf['ticker_interval'])
    assert log_has(
        'Outdated history for pair xyz. Last tick is 16 minutes old',
        caplog.record_tuples
    )


def test_get_signal_handles_exceptions(mocker, default_conf):
    mocker.patch('freqtrade.exchange.Exchange.get_ticker_history', return_value=MagicMock())
    exchange = get_patched_exchange(mocker, default_conf)
    mocker.patch.multiple(
        'freqtrade.analyze.Analyze',
        analyze_ticker=MagicMock(
            side_effect=Exception('invalid ticker history ')
        )
    )

    assert _ANALYZE.get_signal(exchange, 'ETH/BTC', '5m') == (False, False)


def test_parse_ticker_dataframe(ticker_history):
    columns = ['date', 'open', 'high', 'low', 'close', 'volume']

    # Test file with BV data
    dataframe = Analyze.parse_ticker_dataframe(ticker_history)
    assert dataframe.columns.tolist() == columns


def test_tickerdata_to_dataframe(default_conf) -> None:
    """
    Test Analyze.tickerdata_to_dataframe() method
    """
    analyze = Analyze(default_conf)

    timerange = TimeRange(None, 'line', 0, -100)
    tick = load_tickerdata_file(None, 'UNITTEST/BTC', '1m', timerange=timerange)
    tickerlist = {'UNITTEST/BTC': tick}
    data = analyze.tickerdata_to_dataframe(tickerlist)
    assert len(data['UNITTEST/BTC']) == 99       # partial candle was removed