import random
from datetime import datetime, timedelta, timezone

import pytest

from freqtrade import constants
from freqtrade.enums import ExitType
from freqtrade.persistence import PairLocks, Trade
from freqtrade.persistence.trade_model import Order
from freqtrade.plugins.protectionmanager import ProtectionManager
from tests.conftest import get_patched_freqtradebot, log_has_re


def generate_mock_trade(
    pair: str,
    fee: float,
    is_open: bool,
    exit_reason: str = ExitType.EXIT_SIGNAL,
    min_ago_open: int = None,
    min_ago_close: int = None,
    profit_rate: float = 0.9,
    is_short: bool = False,
):
    open_rate = random.random()

    trade = Trade(
        pair=pair,
        stake_amount=0.01,
        fee_open=fee,
        fee_close=fee,
        open_date=datetime.now(timezone.utc) - timedelta(minutes=min_ago_open or 200),
        close_date=datetime.now(timezone.utc) - timedelta(minutes=min_ago_close or 30),
        open_rate=open_rate,
        is_open=is_open,
        amount=0.01 / open_rate,
        exchange="binance",
        is_short=is_short,
        leverage=1,
    )

    trade.orders.append(
        Order(
            ft_order_side=trade.entry_side,
            order_id=f"{pair}-{trade.entry_side}-{trade.open_date}",
            ft_is_open=False,
            ft_pair=pair,
            ft_amount=trade.amount,
            ft_price=trade.open_rate,
            amount=trade.amount,
            filled=trade.amount,
            remaining=0,
            price=open_rate,
            average=open_rate,
            status="closed",
            order_type="market",
            side=trade.entry_side,
        )
    )
    if not is_open:
        close_price = open_rate * (2 - profit_rate if is_short else profit_rate)
        trade.orders.append(
            Order(
                ft_order_side=trade.exit_side,
                order_id=f"{pair}-{trade.exit_side}-{trade.close_date}",
                ft_is_open=False,
                ft_pair=pair,
                ft_amount=trade.amount,
                ft_price=trade.open_rate,
                amount=trade.amount,
                filled=trade.amount,
                remaining=0,
                price=close_price,
                average=close_price,
                status="closed",
                order_type="market",
                side=trade.exit_side,
            )
        )

    trade.recalc_open_trade_value()
    if not is_open:
        trade.close(close_price)
        trade.exit_reason = exit_reason

    Trade.session.add(trade)
    Trade.commit()
    return trade


def test_protectionmanager(mocker, default_conf):
    default_conf["protections"] = [
        {"method": protection} for protection in constants.AVAILABLE_PROTECTIONS
    ]
    freqtrade = get_patched_freqtradebot(mocker, default_conf)

    for handler in freqtrade.protections._protection_handlers:
        assert handler.name in constants.AVAILABLE_PROTECTIONS
        if not handler.has_global_stop:
            assert handler.global_stop(datetime.now(timezone.utc), "*") is None
        if not handler.has_local_stop:
            assert handler.stop_per_pair("XRP/BTC", datetime.now(timezone.utc), "*") is None


@pytest.mark.parametrize(
    "timeframe,expected,protconf",
    [
        (
            "1m",
            [20, 10],
            [{"method": "StoplossGuard", "lookback_period_candles": 20, "stop_duration": 10}],
        ),
        (
            "5m",
            [100, 15],
            [{"method": "StoplossGuard", "lookback_period_candles": 20, "stop_duration": 15}],
        ),
        (
            "1h",
            [1200, 40],
            [{"method": "StoplossGuard", "lookback_period_candles": 20, "stop_duration": 40}],
        ),
        (
            "1d",
            [1440, 5],
            [{"method": "StoplossGuard", "lookback_period_candles": 1, "stop_duration": 5}],
        ),
        (
            "1m",
            [20, 5],
            [{"method": "StoplossGuard", "lookback_period": 20, "stop_duration_candles": 5}],
        ),
        (
            "5m",
            [15, 25],
            [{"method": "StoplossGuard", "lookback_period": 15, "stop_duration_candles": 5}],
        ),
        (
            "1h",
            [50, 600],
            [{"method": "StoplossGuard", "lookback_period": 50, "stop_duration_candles": 10}],
        ),
        (
            "1h",
            [60, 540],
            [{"method": "StoplossGuard", "lookback_period_candles": 1, "stop_duration_candles": 9}],
        ),
    ],
)
def test_protections_init(default_conf, timeframe, expected, protconf):
    default_conf["timeframe"] = timeframe
    man = ProtectionManager(default_conf, protconf)
    assert len(man._protection_handlers) == len(protconf)
    assert man._protection_handlers[0]._lookback_period == expected[0]
    assert man._protection_handlers[0]._stop_duration == expected[1]


@pytest.mark.parametrize("is_short", [False, True])
@pytest.mark.usefixtures("init_persistence")
def test_stoploss_guard(mocker, default_conf, fee, caplog, is_short):
    # Active for both sides (long and short)
    default_conf["protections"] = [
        {"method": "StoplossGuard", "lookback_period": 60, "stop_duration": 40, "trade_limit": 3}
    ]
    freqtrade = get_patched_freqtradebot(mocker, default_conf)
    message = r"Trading stopped due to .*"
    assert not freqtrade.protections.global_stop()
    assert not log_has_re(message, caplog)
    caplog.clear()

    generate_mock_trade(
        "XRP/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=200,
        min_ago_close=30,
        is_short=is_short,
    )

    assert not freqtrade.protections.global_stop()
    assert not log_has_re(message, caplog)
    caplog.clear()
    # This trade does not count, as it's closed too long ago
    generate_mock_trade(
        "BCH/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=250,
        min_ago_close=100,
        is_short=is_short,
    )

    generate_mock_trade(
        "ETH/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=240,
        min_ago_close=30,
        is_short=is_short,
    )
    # 3 Trades closed - but the 2nd has been closed too long ago.
    assert not freqtrade.protections.global_stop()
    assert not log_has_re(message, caplog)
    caplog.clear()

    generate_mock_trade(
        "LTC/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=180,
        min_ago_close=30,
        is_short=is_short,
    )

    assert freqtrade.protections.global_stop()
    assert log_has_re(message, caplog)
    assert PairLocks.is_global_lock()

    # Test 5m after lock-period - this should try and relock the pair, but end-time
    # should be the previous end-time
    end_time = PairLocks.get_pair_longest_lock("*").lock_end_time + timedelta(minutes=5)
    freqtrade.protections.global_stop(end_time)
    assert not PairLocks.is_global_lock(end_time)


@pytest.mark.parametrize("only_per_pair", [False, True])
@pytest.mark.parametrize("only_per_side", [False, True])
@pytest.mark.usefixtures("init_persistence")
def test_stoploss_guard_perpair(mocker, default_conf, fee, caplog, only_per_pair, only_per_side):
    default_conf["protections"] = [
        {
            "method": "StoplossGuard",
            "lookback_period": 60,
            "trade_limit": 2,
            "stop_duration": 60,
            "only_per_pair": only_per_pair,
            "only_per_side": only_per_side,
        }
    ]
    check_side = "long" if only_per_side else "*"
    is_short = False
    freqtrade = get_patched_freqtradebot(mocker, default_conf)
    message = r"Trading stopped due to .*"
    pair = "XRP/BTC"
    assert not freqtrade.protections.stop_per_pair(pair)
    assert not freqtrade.protections.global_stop()
    assert not log_has_re(message, caplog)
    caplog.clear()

    generate_mock_trade(
        pair,
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=200,
        min_ago_close=30,
        profit_rate=0.9,
        is_short=is_short,
    )

    assert not freqtrade.protections.stop_per_pair(pair)
    assert not freqtrade.protections.global_stop()
    assert not log_has_re(message, caplog)
    caplog.clear()
    # This trade does not count, as it's closed too long ago
    generate_mock_trade(
        pair,
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=250,
        min_ago_close=100,
        profit_rate=0.9,
        is_short=is_short,
    )
    # Trade does not count for per pair stop as it's the wrong pair.
    generate_mock_trade(
        "ETH/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=240,
        min_ago_close=30,
        profit_rate=0.9,
        is_short=is_short,
    )
    # 3 Trades closed - but the 2nd has been closed too long ago.
    assert not freqtrade.protections.stop_per_pair(pair)
    assert freqtrade.protections.global_stop() != only_per_pair
    if not only_per_pair:
        assert log_has_re(message, caplog)
    else:
        assert not log_has_re(message, caplog)

    caplog.clear()

    # Trade does not count potentially, as it's in the wrong direction
    generate_mock_trade(
        pair,
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=150,
        min_ago_close=25,
        profit_rate=0.9,
        is_short=not is_short,
    )
    freqtrade.protections.stop_per_pair(pair)
    assert freqtrade.protections.global_stop() != only_per_pair
    assert PairLocks.is_pair_locked(pair, side=check_side) != (only_per_side and only_per_pair)
    assert PairLocks.is_global_lock(side=check_side) != only_per_pair
    if only_per_side:
        assert not PairLocks.is_pair_locked(pair, side="*")
        assert not PairLocks.is_global_lock(side="*")

    caplog.clear()

    # 2nd Trade that counts with correct pair
    generate_mock_trade(
        pair,
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=180,
        min_ago_close=31,
        profit_rate=0.9,
        is_short=is_short,
    )

    freqtrade.protections.stop_per_pair(pair)
    assert freqtrade.protections.global_stop() != only_per_pair
    assert PairLocks.is_pair_locked(pair, side=check_side)
    assert PairLocks.is_global_lock(side=check_side) != only_per_pair
    if only_per_side:
        assert not PairLocks.is_pair_locked(pair, side="*")
        assert not PairLocks.is_global_lock(side="*")


@pytest.mark.usefixtures("init_persistence")
def test_CooldownPeriod(mocker, default_conf, fee, caplog):
    default_conf["protections"] = [
        {
            "method": "CooldownPeriod",
            "stop_duration": 60,
        }
    ]
    freqtrade = get_patched_freqtradebot(mocker, default_conf)
    message = r"Trading stopped due to .*"
    assert not freqtrade.protections.global_stop()
    assert not freqtrade.protections.stop_per_pair("XRP/BTC")

    assert not log_has_re(message, caplog)
    caplog.clear()

    generate_mock_trade(
        "XRP/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=200,
        min_ago_close=30,
    )

    assert not freqtrade.protections.global_stop()
    assert freqtrade.protections.stop_per_pair("XRP/BTC")
    assert PairLocks.is_pair_locked("XRP/BTC")
    assert not PairLocks.is_global_lock()

    generate_mock_trade(
        "ETH/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.ROI.value,
        min_ago_open=205,
        min_ago_close=35,
    )

    assert not freqtrade.protections.global_stop()
    assert not PairLocks.is_pair_locked("ETH/BTC")
    assert freqtrade.protections.stop_per_pair("ETH/BTC")
    assert PairLocks.is_pair_locked("ETH/BTC")
    assert not PairLocks.is_global_lock()


@pytest.mark.parametrize("only_per_side", [False, True])
@pytest.mark.usefixtures("init_persistence")
def test_LowProfitPairs(mocker, default_conf, fee, caplog, only_per_side):
    default_conf["protections"] = [
        {
            "method": "LowProfitPairs",
            "lookback_period": 400,
            "stop_duration": 60,
            "trade_limit": 2,
            "required_profit": 0.0,
            "only_per_side": only_per_side,
        }
    ]
    freqtrade = get_patched_freqtradebot(mocker, default_conf)
    message = r"Trading stopped due to .*"
    assert not freqtrade.protections.global_stop()
    assert not freqtrade.protections.stop_per_pair("XRP/BTC")

    assert not log_has_re(message, caplog)
    caplog.clear()

    generate_mock_trade(
        "XRP/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=800,
        min_ago_close=450,
        profit_rate=0.9,
    )

    Trade.commit()
    # Not locked with 1 trade
    assert not freqtrade.protections.global_stop()
    assert not freqtrade.protections.stop_per_pair("XRP/BTC")
    assert not PairLocks.is_pair_locked("XRP/BTC")
    assert not PairLocks.is_global_lock()

    generate_mock_trade(
        "XRP/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=200,
        min_ago_close=120,
        profit_rate=0.9,
    )

    Trade.commit()
    # Not locked with 1 trade (first trade is outside of lookback_period)
    assert not freqtrade.protections.global_stop()
    assert not freqtrade.protections.stop_per_pair("XRP/BTC")
    assert not PairLocks.is_pair_locked("XRP/BTC")
    assert not PairLocks.is_global_lock()

    # Add positive trade
    generate_mock_trade(
        "XRP/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.ROI.value,
        min_ago_open=20,
        min_ago_close=10,
        profit_rate=1.15,
        is_short=True,
    )
    Trade.commit()
    assert freqtrade.protections.stop_per_pair("XRP/BTC") != only_per_side
    assert not PairLocks.is_pair_locked("XRP/BTC", side="*")
    assert PairLocks.is_pair_locked("XRP/BTC", side="long") == only_per_side

    generate_mock_trade(
        "XRP/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=110,
        min_ago_close=21,
        profit_rate=0.8,
    )
    Trade.commit()

    # Locks due to 2nd trade
    assert freqtrade.protections.global_stop() != only_per_side
    assert freqtrade.protections.stop_per_pair("XRP/BTC") != only_per_side
    assert PairLocks.is_pair_locked("XRP/BTC", side="long")
    assert PairLocks.is_pair_locked("XRP/BTC", side="*") != only_per_side
    assert not PairLocks.is_global_lock()
    Trade.commit()


@pytest.mark.usefixtures("init_persistence")
def test_MaxDrawdown(mocker, default_conf, fee, caplog):
    default_conf["protections"] = [
        {
            "method": "MaxDrawdown",
            "lookback_period": 1000,
            "stop_duration": 60,
            "trade_limit": 3,
            "max_allowed_drawdown": 0.15,
        }
    ]
    freqtrade = get_patched_freqtradebot(mocker, default_conf)
    message = r"Trading stopped due to Max.*"

    assert not freqtrade.protections.global_stop()
    assert not freqtrade.protections.stop_per_pair("XRP/BTC")
    caplog.clear()

    generate_mock_trade(
        "XRP/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=1000,
        min_ago_close=900,
        profit_rate=1.1,
    )
    generate_mock_trade(
        "ETH/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=1000,
        min_ago_close=900,
        profit_rate=1.1,
    )
    generate_mock_trade(
        "NEO/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=1000,
        min_ago_close=900,
        profit_rate=1.1,
    )
    Trade.commit()
    # No losing trade yet ... so max_drawdown will raise exception
    assert not freqtrade.protections.global_stop()
    assert not freqtrade.protections.stop_per_pair("XRP/BTC")

    generate_mock_trade(
        "XRP/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=500,
        min_ago_close=400,
        profit_rate=0.9,
    )
    # Not locked with one trade
    assert not freqtrade.protections.global_stop()
    assert not freqtrade.protections.stop_per_pair("XRP/BTC")
    assert not PairLocks.is_pair_locked("XRP/BTC")
    assert not PairLocks.is_global_lock()

    generate_mock_trade(
        "XRP/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.STOP_LOSS.value,
        min_ago_open=1200,
        min_ago_close=1100,
        profit_rate=0.5,
    )
    Trade.commit()

    # Not locked with 1 trade (2nd trade is outside of lookback_period)
    assert not freqtrade.protections.global_stop()
    assert not freqtrade.protections.stop_per_pair("XRP/BTC")
    assert not PairLocks.is_pair_locked("XRP/BTC")
    assert not PairLocks.is_global_lock()
    assert not log_has_re(message, caplog)

    # Winning trade ... (should not lock, does not change drawdown!)
    generate_mock_trade(
        "XRP/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.ROI.value,
        min_ago_open=320,
        min_ago_close=410,
        profit_rate=1.5,
    )
    Trade.commit()
    assert not freqtrade.protections.global_stop()
    assert not PairLocks.is_global_lock()

    caplog.clear()

    # Add additional negative trade, causing a loss of > 15%
    generate_mock_trade(
        "XRP/BTC",
        fee.return_value,
        False,
        exit_reason=ExitType.ROI.value,
        min_ago_open=20,
        min_ago_close=10,
        profit_rate=0.8,
    )
    Trade.commit()
    assert not freqtrade.protections.stop_per_pair("XRP/BTC")
    # local lock not supported
    assert not PairLocks.is_pair_locked("XRP/BTC")
    assert freqtrade.protections.global_stop()
    assert PairLocks.is_global_lock()
    assert log_has_re(message, caplog)


@pytest.mark.parametrize(
    "protectionconf,desc_expected,exception_expected",
    [
        (
            {
                "method": "StoplossGuard",
                "lookback_period": 60,
                "trade_limit": 2,
                "stop_duration": 60,
            },
            "[{'StoplossGuard': 'StoplossGuard - Frequent Stoploss Guard, "
            "2 stoplosses with profit < 0.00% within 60 minutes.'}]",
            None,
        ),
        (
            {"method": "CooldownPeriod", "stop_duration": 60},
            "[{'CooldownPeriod': 'CooldownPeriod - Cooldown period of 60 minutes.'}]",
            None,
        ),
        (
            {"method": "LowProfitPairs", "lookback_period": 60, "stop_duration": 60},
            "[{'LowProfitPairs': 'LowProfitPairs - Low Profit Protection, locks pairs with "
            "profit < 0.0 within 60 minutes.'}]",
            None,
        ),
        (
            {"method": "MaxDrawdown", "lookback_period": 60, "stop_duration": 60},
            "[{'MaxDrawdown': 'MaxDrawdown - Max drawdown protection, stop trading "
            "if drawdown is > 0.0 within 60 minutes.'}]",
            None,
        ),
        (
            {
                "method": "StoplossGuard",
                "lookback_period_candles": 12,
                "trade_limit": 2,
                "required_profit": -0.05,
                "stop_duration": 60,
            },
            "[{'StoplossGuard': 'StoplossGuard - Frequent Stoploss Guard, "
            "2 stoplosses with profit < -5.00% within 12 candles.'}]",
            None,
        ),
        (
            {"method": "CooldownPeriod", "stop_duration_candles": 5},
            "[{'CooldownPeriod': 'CooldownPeriod - Cooldown period of 5 candles.'}]",
            None,
        ),
        (
            {"method": "LowProfitPairs", "lookback_period_candles": 11, "stop_duration": 60},
            "[{'LowProfitPairs': 'LowProfitPairs - Low Profit Protection, locks pairs with "
            "profit < 0.0 within 11 candles.'}]",
            None,
        ),
        (
            {"method": "MaxDrawdown", "lookback_period_candles": 20, "stop_duration": 60},
            "[{'MaxDrawdown': 'MaxDrawdown - Max drawdown protection, stop trading "
            "if drawdown is > 0.0 within 20 candles.'}]",
            None,
        ),
    ],
)
def test_protection_manager_desc(
    mocker, default_conf, protectionconf, desc_expected, exception_expected
):
    default_conf["protections"] = [protectionconf]
    freqtrade = get_patched_freqtradebot(mocker, default_conf)

    short_desc = str(freqtrade.protections.short_desc())
    assert short_desc == desc_expected