import json
import logging
import sys
from datetime import datetime, timedelta
from pathlib import Path

from pandas import DataFrame

# Resolve project root from this file's location (works on any machine)
_BASE = Path(__file__).resolve().parent.parent.parent
if str(_BASE) not in sys.path:
    sys.path.insert(0, str(_BASE))

from freqtrade.persistence import Trade
from freqtrade.strategy import IStrategy, merge_informative_pair

from indicators.macro_merge import merge_macro_data
from qnt.oracle.hmm_regime import detect_regime, get_regime_for_strategy
from qnt.thesis.thesis_reader import read_thesis
from risk.correlation_guard import is_blocked as corr_blocked
from risk.risk_manager import run_all_checks
from risk.stake_sizer import get_stake_multiplier
from sentiment.reader import get_current_sentiment, get_funding_rate

logger = logging.getLogger(__name__)

_partial_exits_done: set = set()


class SwingV1(IStrategy):
    """
    15-minute swing strategy.
    Entry: EMA 9 > EMA 21 + RSI 40-60
    Exit: EMA 9 < EMA 21 or Trailing Stop
    """

    INTERFACE_VERSION = 3

    timeframe = "15m"
    informative_timeframes = ["1h"]

    stoploss = -0.03
    trailing_stop = True
    trailing_stop_positive = 0.015
    trailing_stop_positive_offset = 0.02  # activate trailing only after 2% profit locked

    # R:R fixed: target 5% → 3% → 2% — never smaller than the 3% stoploss risk
    minimal_roi = {
        "0": 0.05,
        "120": 0.03,
        "300": 0.02,
        "600": 0.01,
    }

    def informative_pairs(self):
        pairs = self.dp.current_whitelist()
        return [(pair, "1h") for pair in pairs]

    def populate_indicators(self, dataframe: DataFrame, metadata: dict) -> DataFrame:
        from qnt.polars_indicators import add_ema, add_rsi, add_sma
        from qnt.polars_ohlcv import ohlcv_to_pandas, pandas_to_polars

        df_pl = pandas_to_polars(dataframe)

        # 15m Indicators
        df_pl = add_ema(df_pl, period=9, alias="ema_9")
        df_pl = add_ema(df_pl, period=21, alias="ema_21")
        df_pl = add_rsi(df_pl, period=14, alias="rsi")
        df_pl = add_sma(df_pl, period=20, column="volume", alias="volume_ma")

        # 1h Informative
        if getattr(self, "config", {}).get("runmode", {}).value in ("live", "dry_run"):
            inf_df_pd = self.dp.get_pair_dataframe(metadata["pair"], "1h")
            if inf_df_pd is not None and not inf_df_pd.empty:
                inf_df_pl = pandas_to_polars(inf_df_pd)
                inf_df_pl = add_ema(inf_df_pl, period=50, alias="ema_50")
                inf_df_pd = ohlcv_to_pandas(inf_df_pl)

            dataframe = merge_informative_pair(
                ohlcv_to_pandas(df_pl), inf_df_pd, self.timeframe, "1h", ffill=True
            )
            df_pl = pandas_to_polars(dataframe)

        dataframe = ohlcv_to_pandas(df_pl)
        dataframe = merge_macro_data(dataframe)
        return dataframe

    def populate_entry_trend(self, dataframe: DataFrame, metadata: dict) -> DataFrame:
        is_live = self.config.get("runmode", {}).value in ("live", "dry_run")

        sentiment_ok = True
        regime_ok = True
        if is_live:
            sentiment = get_current_sentiment()
            sentiment_ok = sentiment["score"] >= -0.3
            regime = detect_regime(dataframe, metadata["pair"])
            regime_ok = get_regime_for_strategy("SwingV1", regime)

        ema_50_1h = dataframe.get("ema_50_1h", dataframe["close"])

        dataframe.loc[
            (
                (dataframe["ema_9"] > dataframe["ema_21"])
                & (dataframe["ema_9"].shift(1) > dataframe["ema_21"].shift(1))
                & (dataframe["ema_9"].shift(2) <= dataframe["ema_21"].shift(2))
                & (dataframe["rsi"] >= 45)
                & (dataframe["rsi"] <= 65)
                & (dataframe["rsi"] > dataframe["rsi"].shift(1))
                & (dataframe["volume"] > dataframe["volume_ma"] * 1.1)
                & (dataframe["close"] > ema_50_1h)
                & (sentiment_ok)
                & (regime_ok)
            ),
            "enter_long",
        ] = 1

        return dataframe

    def populate_exit_trend(self, dataframe: DataFrame, metadata: dict) -> DataFrame:
        # Require EMA9 < EMA21 for 2 consecutive candles — sustained reversal, not a single-candle wick
        dataframe.loc[
            (dataframe["ema_9"] < dataframe["ema_21"])
            & (dataframe["ema_9"].shift(1) < dataframe["ema_21"].shift(1)),
            "exit_long",
        ] = 1
        return dataframe

    def adjust_trade_position(
        self,
        trade,
        current_time: datetime,
        current_rate: float,
        current_profit: float,
        min_stake,
        max_stake,
        current_entry_rate: float,
        current_exit_rate: float,
        current_entry_profit: float,
        current_exit_profit: float,
        **kwargs,
    ):
        if trade.id in _partial_exits_done:
            return None
        if current_profit >= 0.025:
            _partial_exits_done.add(trade.id)
            logger.info(
                f"[PARTIAL EXIT] SwingV1 {trade.pair} profit={current_profit:.2%} — exiting 50%"
            )
            return -(trade.stake_amount * 0.5)
        return None

    def custom_exit(
        self,
        pair: str,
        trade,
        current_time: datetime,
        current_rate: float,
        current_profit: float,
        **kwargs,
    ):
        # Cut losses after 24 hours if still negative — prevents week-long trapped positions
        hours_open = (current_time - trade.open_date_utc).total_seconds() / 3600
        if hours_open >= 24 and current_profit < -0.005:
            return "time_stop_24h"
        return None

    def custom_stake_amount(
        self,
        current_time,
        current_rate,
        proposed_stake,
        min_stake,
        max_stake,
        leverage,
        entry_tag,
        side,
        **kwargs,
    ):
        multiplier = get_stake_multiplier("SwingV1")
        stake = proposed_stake * multiplier
        if min_stake is not None:
            stake = max(stake, min_stake)
        return min(stake, max_stake)

    def confirm_trade_entry(
        self,
        pair: str,
        order_type: str,
        amount: float,
        rate: float,
        time_in_force: str,
        current_time: datetime,
        entry_tag: str,
        side: str,
        **kwargs,
    ) -> bool:
        if self.config.get("runmode", {}).value not in ("live", "dry_run"):
            return True

        # --- LAYER 0: THESIS GATE ---
        thesis = read_thesis(pair)
        if thesis["bias"] == "SELL":
            logger.info(
                f"[THESIS BLOCK] {pair} bias=SELL confidence={thesis['confidence']:.2f} — {thesis['reasoning']}"
            )
            return False
        stake_modifier = thesis.get("stake_modifier", 1.0)

        # --- LAYER 1: RISK & SENTIMENT CHECKS ---
        try:
            total_balance = self.wallets.get_total("USDT")

            # Fetch recent trades for loss counting
            recent_trades = [
                {
                    "profit_ratio": float(
                        getattr(t, "close_profit", None) or getattr(t, "profit_ratio", None) or 0.0
                    ),
                    "close_date": getattr(t, "close_date", None),
                }
                for t in Trade.get_trades_proxy(is_open=False)
            ][:10]

            # Count trades in the last hour
            one_hour_ago = current_time - timedelta(hours=1)
            trades_last_hour = len(
                [
                    t
                    for t in Trade.get_trades_proxy(is_open=False)
                    if t.close_date and t.close_date >= one_hour_ago
                ]
            )

            # Load balance state for drawdown checks
            state_file = _BASE / "risk/balance_state.json"
            if state_file.exists():
                with open(state_file) as f:
                    state = json.load(f)
                start_of_day = state.get("start_of_day", total_balance)
                start_of_week = state.get("start_of_week", total_balance)
            else:
                start_of_day = total_balance
                start_of_week = total_balance

            # SwingV1 requires at least NEUTRAL sentiment
            risk_result = run_all_checks(
                current_balance=total_balance,
                start_of_day_balance=start_of_day,
                start_of_week_balance=start_of_week,
                trade_amount_usdt=amount * rate * stake_modifier,
                trades_last_hour=trades_last_hour,
                recent_trades=recent_trades,
                min_sentiment="NEUTRAL",
            )

            if not risk_result["safe_to_trade"]:
                logger.info(
                    f"[RISK/SENTIMENT BLOCK] Swing blocked for {pair}. Reasons: {risk_result['blocking_reasons']}"
                )
                return False

            # Log sentiment for visibility
            sentiment = get_current_sentiment()
            logger.info(f"[Sentiment Check] {pair} | Score: {sentiment['score']:.3f}")

        except Exception as e:
            logger.error(f"[RISK WARNING] Risk check error: {e}")

        base = pair.split("/")[0]
        if corr_blocked(base, side):
            logger.info(f"[CORR BLOCK] SwingV1 {pair} — too many concurrent longs on {base}")
            return False

        if side == "long":
            funding = get_funding_rate()
            if funding < -0.5:
                logger.info(
                    f"[FUNDING BLOCK] SwingV1 {pair} funding={funding:.2f} — extreme negative funding"
                )
                return False

        return True