"""
적응형 전략 엔진 유닛 테스트

[테스트 범위]
  - MarketCondition 분석
  - 모드 전환 로직
  - AdaptiveParams 생성
  - fallback 동작
  - 파라미터 테이블 정합성
"""
import pytest
from unittest.mock import patch, MagicMock

from app.services.adaptive_strategy import (
    MarketCondition,
    AdaptiveParams,
    TradingMode,
    VixLevel,
    TrendStrength,
    VolumeRegime,
    analyze_market_condition,
    get_adaptive_params,
    _get_fallback_params,
    _calculate_atr_percentile,
    _determine_vix_level,
    _determine_trend_strength,
    _determine_volume_regime,
    _determine_trading_mode,
    get_current_adaptive_params,
    get_adaptive_status,
    _MODE_PARAMS,
)


# ═════════════════════════════════════════════════════════════════════════════
# ATR Percentile
# ═════════════════════════════════════════════════════════════════════════════

class TestATRPercentile:
    def test_empty_history(self):
        assert _calculate_atr_percentile([], 10.0) == 50.0

    def test_zero_atr(self):
        assert _calculate_atr_percentile([1.0, 2.0, 3.0], 0.0) == 50.0

    def test_lowest(self):
        history = [10.0, 20.0, 30.0, 40.0, 50.0]
        result = _calculate_atr_percentile(history, 5.0)
        assert result == 0.0

    def test_highest(self):
        history = [10.0, 20.0, 30.0, 40.0, 50.0]
        result = _calculate_atr_percentile(history, 60.0)
        assert result == 100.0

    def test_median(self):
        history = [10.0, 20.0, 30.0, 40.0, 50.0]
        result = _calculate_atr_percentile(history, 30.0)
        assert result == 60.0  # 3 out of 5 <= 30


# ═════════════════════════════════════════════════════════════════════════════
# VIX Level
# ═════════════════════════════════════════════════════════════════════════════

class TestVixLevel:
    def test_extreme(self):
        assert _determine_vix_level(95.0) == VixLevel.EXTREME.value

    def test_high(self):
        assert _determine_vix_level(75.0) == VixLevel.HIGH.value

    def test_normal(self):
        assert _determine_vix_level(50.0) == VixLevel.NORMAL.value

    def test_low(self):
        assert _determine_vix_level(20.0) == VixLevel.LOW.value


# ═════════════════════════════════════════════════════════════════════════════
# Trend Strength
# ═════════════════════════════════════════════════════════════════════════════

class TestTrendStrength:
    def test_strong_up(self):
        result = _determine_trend_strength(adx=30.0, ma20=100.0, ma60=95.0, current_price=105.0)
        assert result == TrendStrength.STRONG_UP.value

    def test_strong_down(self):
        result = _determine_trend_strength(adx=30.0, ma20=95.0, ma60=100.0, current_price=90.0)
        assert result == TrendStrength.STRONG_DOWN.value

    def test_sideways_low_adx(self):
        result = _determine_trend_strength(adx=15.0, ma20=100.0, ma60=99.0, current_price=100.0)
        assert result == TrendStrength.SIDEWAYS.value

    def test_weak_up(self):
        result = _determine_trend_strength(adx=22.0, ma20=100.0, ma60=102.0, current_price=101.0)
        assert result == TrendStrength.WEAK_UP.value

    def test_weak_down(self):
        result = _determine_trend_strength(adx=22.0, ma20=100.0, ma60=98.0, current_price=99.0)
        assert result == TrendStrength.WEAK_DOWN.value


# ═════════════════════════════════════════════════════════════════════════════
# Volume Regime
# ═════════════════════════════════════════════════════════════════════════════

class TestVolumeRegime:
    def test_surge(self):
        assert _determine_volume_regime(2.5) == VolumeRegime.SURGE.value

    def test_normal(self):
        assert _determine_volume_regime(1.0) == VolumeRegime.NORMAL.value

    def test_dry(self):
        assert _determine_volume_regime(0.5) == VolumeRegime.DRY.value


# ═════════════════════════════════════════════════════════════════════════════
# Trading Mode
# ═════════════════════════════════════════════════════════════════════════════

class TestTradingMode:
    def test_crisis_high_atr(self):
        # CLAUDE.md 8.5: ATR백분위 > 90 → Crisis
        result = _determine_trading_mode(atr_percentile=91.0, adx_value=20.0, recent_5d_return=0.0, mdd_current=0.0)
        assert result == TradingMode.CRISIS.value

    def test_crisis_deep_loss(self):
        # CLAUDE.md 8.5: 5일수익 < -5% → Crisis
        result = _determine_trading_mode(atr_percentile=50.0, adx_value=20.0, recent_5d_return=-6.0, mdd_current=0.0)
        assert result == TradingMode.CRISIS.value

    def test_crisis_mdd(self):
        # CLAUDE.md 8.5: MDD < -10% → Crisis
        result = _determine_trading_mode(atr_percentile=50.0, adx_value=20.0, recent_5d_return=0.0, mdd_current=-11.0)
        assert result == TradingMode.CRISIS.value

    def test_defensive_high_atr(self):
        # CLAUDE.md 8.5: ATR백분위 > 70 → Defensive (but < 90 so not Crisis)
        result = _determine_trading_mode(atr_percentile=75.0, adx_value=20.0, recent_5d_return=0.0, mdd_current=0.0)
        assert result == TradingMode.DEFENSIVE.value

    def test_defensive_moderate_loss(self):
        # CLAUDE.md 8.5: 5일수익 < -3% → Defensive (but > -5% so not Crisis)
        result = _determine_trading_mode(atr_percentile=50.0, adx_value=20.0, recent_5d_return=-4.0, mdd_current=0.0)
        assert result == TradingMode.DEFENSIVE.value

    def test_aggressive(self):
        result = _determine_trading_mode(atr_percentile=20.0, adx_value=30.0, recent_5d_return=3.0, mdd_current=0.0)
        assert result == TradingMode.AGGRESSIVE.value

    def test_aggressive_requires_all_conditions(self):
        # ATR low but ADX too low -> Normal
        result = _determine_trading_mode(atr_percentile=20.0, adx_value=15.0, recent_5d_return=3.0, mdd_current=0.0)
        assert result == TradingMode.NORMAL.value

    def test_normal_default(self):
        result = _determine_trading_mode(atr_percentile=50.0, adx_value=20.0, recent_5d_return=0.5, mdd_current=0.0)
        assert result == TradingMode.NORMAL.value

    def test_crisis_takes_priority_over_defensive(self):
        # ATR=92 triggers both crisis (>90) and defensive (>70), crisis wins
        result = _determine_trading_mode(atr_percentile=92.0, adx_value=30.0, recent_5d_return=3.0, mdd_current=0.0)
        assert result == TradingMode.CRISIS.value


# ═════════════════════════════════════════════════════════════════════════════
# AdaptiveParams Generation
# ═════════════════════════════════════════════════════════════════════════════

class TestGetAdaptiveParams:
    def test_normal_mode(self):
        condition = MarketCondition(trading_mode=TradingMode.NORMAL.value)
        params = get_adaptive_params(condition)
        assert params.trading_mode == TradingMode.NORMAL.value
        assert params.position_size == 0.06
        assert params.max_holdings == 14
        assert params.daytrading_enabled is True

    def test_crisis_mode(self):
        condition = MarketCondition(trading_mode=TradingMode.CRISIS.value)
        params = get_adaptive_params(condition)
        assert params.trading_mode == TradingMode.CRISIS.value
        assert params.position_size == 0.015
        assert params.max_holdings == 3
        assert params.daytrading_enabled is False
        assert params.short_term_enabled is False

    def test_defensive_mode(self):
        condition = MarketCondition(trading_mode=TradingMode.DEFENSIVE.value)
        params = get_adaptive_params(condition)
        assert params.trading_mode == TradingMode.DEFENSIVE.value
        assert params.position_size == 0.04
        assert params.daytrading_enabled is True

    def test_aggressive_mode(self):
        condition = MarketCondition(trading_mode=TradingMode.AGGRESSIVE.value)
        params = get_adaptive_params(condition)
        assert params.trading_mode == TradingMode.AGGRESSIVE.value
        assert params.position_size == 0.07
        assert params.max_holdings == 15
        assert params.rsi_entry == 50.0

    def test_condition_attached(self):
        condition = MarketCondition(
            trading_mode=TradingMode.NORMAL.value,
            atr_percentile=42.0,
        )
        params = get_adaptive_params(condition)
        assert params.condition is not None
        assert params.condition.atr_percentile == 42.0


# ═════════════════════════════════════════════════════════════════════════════
# Fallback
# ═════════════════════════════════════════════════════════════════════════════

class TestFallback:
    def test_fallback_returns_normal_mode(self):
        params = _get_fallback_params()
        assert params.trading_mode == TradingMode.NORMAL.value
        assert params.fallback_used is True

    def test_fallback_uses_config_values(self):
        from app.core.config import settings

        params = _get_fallback_params()
        # fallback은 하드코딩이 아니라 settings 값을 그대로 읽어야 한다.
        # config.py 기본값이 바뀌어도(예: MAX_POSITION_SIZE 0.06→0.04) 이 테스트가
        # 함께 갱신되도록 settings를 직접 참조한다.
        assert params.position_size == settings.MAX_POSITION_SIZE
        assert params.atr_stop_multiplier == settings.ATR_STOP_MULTIPLIER

    def test_get_current_without_init(self):
        """초기화 없이 호출하면 fallback을 반환해야 한다."""
        # Reset global state
        import app.services.adaptive_strategy as mod
        mod._current_params = None
        mod._last_update_ts = 0.0

        params = get_current_adaptive_params()
        assert params.fallback_used is True
        assert params.trading_mode == TradingMode.NORMAL.value


# ═════════════════════════════════════════════════════════════════════════════
# analyze_market_condition
# ═════════════════════════════════════════════════════════════════════════════

class TestAnalyzeMarketCondition:
    def test_insufficient_data(self):
        condition = analyze_market_condition(closes=[100.0] * 10)
        assert condition.trading_mode == TradingMode.NORMAL.value

    def test_with_full_data(self):
        # Generate synthetic data: 100 days of gradually rising prices
        closes = [10000.0 + i * 10 for i in range(100)]
        highs = [c + 50 for c in closes]
        lows = [c - 50 for c in closes]
        volumes = [1000000.0] * 100

        condition = analyze_market_condition(
            closes=closes, highs=highs, lows=lows, volumes=volumes
        )
        assert condition.analyzed_at != ""
        assert condition.trading_mode in [m.value for m in TradingMode]

    def test_high_volatility_triggers_defensive(self):
        # Create highly volatile data
        import random
        random.seed(42)
        base = [10000.0]
        for _ in range(99):
            change = random.uniform(-500, 500)
            base.append(max(5000, base[-1] + change))

        # Make last 5 days very volatile
        for i in range(95, 100):
            base[i] = base[i] + random.uniform(-1000, 1000)

        highs = [c + abs(c * 0.05) for c in base]
        lows = [c - abs(c * 0.05) for c in base]
        volumes = [1000000.0] * 100

        condition = analyze_market_condition(
            closes=base, highs=highs, lows=lows, volumes=volumes
        )
        # High volatility should push toward defensive or crisis
        assert condition.atr_percentile > 0  # some ATR analysis happened

    def test_mdd_triggers_crisis(self):
        closes = [10000.0] * 100
        condition = analyze_market_condition(closes=closes, mdd_current=-16.0)
        assert condition.trading_mode == TradingMode.CRISIS.value


# ═════════════════════════════════════════════════════════════════════════════
# Mode Params Table Consistency
# ═════════════════════════════════════════════════════════════════════════════

class TestModeParamsTable:
    """각 모드의 파라미터가 유효한 범위에 있는지 확인."""

    def test_all_modes_defined(self):
        for mode in TradingMode:
            assert mode.value in _MODE_PARAMS

    def test_position_size_range(self):
        for mode, params in _MODE_PARAMS.items():
            assert 0.0 <= params["position_size"] <= 0.10, f"{mode}: position_size out of range"

    def test_stop_loss_negative(self):
        for mode, params in _MODE_PARAMS.items():
            assert params["stop_loss_pct"] < 0, f"{mode}: stop_loss_pct should be negative"

    def test_atr_multiplier_positive(self):
        for mode, params in _MODE_PARAMS.items():
            assert params["atr_stop_multiplier"] > 0, f"{mode}: atr_stop_multiplier should be positive"

    def test_rsi_entry_ascending_with_defense(self):
        """방어적일수록 RSI 진입 기준이 낮아야 한다."""
        assert _MODE_PARAMS["aggressive"]["rsi_entry"] > _MODE_PARAMS["normal"]["rsi_entry"]
        assert _MODE_PARAMS["normal"]["rsi_entry"] > _MODE_PARAMS["defensive"]["rsi_entry"]
        assert _MODE_PARAMS["defensive"]["rsi_entry"] > _MODE_PARAMS["crisis"]["rsi_entry"]

    def test_max_holdings_descending_with_defense(self):
        """방어적일수록 최대 보유 종목이 적어야 한다."""
        assert _MODE_PARAMS["aggressive"]["max_holdings"] >= _MODE_PARAMS["normal"]["max_holdings"]
        assert _MODE_PARAMS["normal"]["max_holdings"] >= _MODE_PARAMS["defensive"]["max_holdings"]
        assert _MODE_PARAMS["defensive"]["max_holdings"] >= _MODE_PARAMS["crisis"]["max_holdings"]

    def test_crisis_disables_daytrading(self):
        assert _MODE_PARAMS["crisis"]["daytrading_enabled"] is False
        assert _MODE_PARAMS["crisis"]["short_term_enabled"] is False

    def test_defensive_disables_short_term(self):
        assert _MODE_PARAMS["defensive"]["daytrading_enabled"] is True
        assert _MODE_PARAMS["defensive"]["short_term_enabled"] is False


# ═════════════════════════════════════════════════════════════════════════════
# API Status
# ═════════════════════════════════════════════════════════════════════════════

class TestAdaptiveStatus:
    def test_status_returns_dict(self):
        # Reset global
        import app.services.adaptive_strategy as mod
        mod._current_params = None
        mod._current_condition = None
        mod._last_update_ts = 0.0

        status = get_adaptive_status()
        assert isinstance(status, dict)
        assert "trading_mode" in status
        assert "params" in status
        assert status["fallback_used"] is True