"""
Trading Strategy API Routes
"""

import json
import re
import time
import traceback
from datetime import datetime

from flask import Blueprint, g, jsonify, request

from app import get_trading_executor
from app.services.backtest import BacktestService
from app.services.strategy import StrategyService
from app.services.strategy_compiler import StrategyCompiler
from app.services.strategy_snapshot import StrategySnapshotResolver
from app.utils.db import get_db_connection
from app.utils.logger import get_logger

try:
    from psycopg2.errors import UndefinedTable as PgUndefinedTable
except Exception:  # pragma: no cover
    PgUndefinedTable = None  # type: ignore
from app.data_sources import DataSourceFactory
from app.utils.auth import login_required

logger = get_logger(__name__)

strategy_bp = Blueprint("strategy", __name__)

# Local mode: avoid heavy initialization during module import.
# Instantiate services lazily on first use to keep startup clean.
_strategy_service = None
_backtest_service = None


def get_strategy_service() -> StrategyService:
    global _strategy_service
    if _strategy_service is None:
        _strategy_service = StrategyService()
    return _strategy_service


def get_backtest_service() -> BacktestService:
    global _backtest_service
    if _backtest_service is None:
        _backtest_service = BacktestService()
    return _backtest_service


@strategy_bp.route("/strategies", methods=["GET"])
@login_required
def list_strategies():
    """
    List strategies for the current user.
    """
    try:
        user_id = g.user_id
        items = get_strategy_service().list_strategies(user_id=user_id)
        return jsonify({"code": 1, "msg": "success", "data": {"strategies": items}})
    except Exception as e:
        logger.error(f"list_strategies failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": {"strategies": []}}), 500


@strategy_bp.route("/strategies/detail", methods=["GET"])
@login_required
def get_strategy_detail():
    try:
        user_id = g.user_id
        strategy_id = request.args.get("id", type=int)
        if not strategy_id:
            return jsonify({"code": 0, "msg": "Missing strategy id parameter", "data": None}), 400
        st = get_strategy_service().get_strategy(strategy_id, user_id=user_id)
        if not st:
            return jsonify({"code": 0, "msg": "Strategy not found", "data": None}), 404
        return jsonify({"code": 1, "msg": "success", "data": st})
    except Exception as e:
        logger.error(f"get_strategy_detail failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": None}), 500


@strategy_bp.route("/strategies/backtest", methods=["POST"])
@login_required
def run_strategy_backtest():
    try:
        payload = request.get_json() or {}
        user_id = g.user_id
        strategy_id = int(payload.get("strategyId") or 0)
        if not strategy_id:
            return jsonify({"code": 0, "msg": "strategyId is required", "data": None}), 400

        start_date_str = str(payload.get("startDate") or "").strip()
        end_date_str = str(payload.get("endDate") or "").strip()
        if not start_date_str or not end_date_str:
            return jsonify({"code": 0, "msg": "startDate and endDate are required", "data": None}), 400

        strategy = get_strategy_service().get_strategy(strategy_id, user_id=user_id)
        if not strategy:
            return jsonify({"code": 0, "msg": "Strategy not found", "data": None}), 404

        resolver = StrategySnapshotResolver(user_id=user_id)
        snapshot = resolver.resolve(strategy, payload.get("overrideConfig") or {})
        snapshot["user_id"] = user_id

        start_date = datetime.strptime(start_date_str, "%Y-%m-%d")
        end_date = datetime.strptime(end_date_str, "%Y-%m-%d").replace(hour=23, minute=59, second=59)

        days_diff = (end_date - start_date).days
        timeframe = snapshot.get("timeframe") or "1D"
        if timeframe == "1m":
            max_days = 30
            max_range_text = "1 month"
        elif timeframe == "5m":
            max_days = 180
            max_range_text = "6 months"
        elif timeframe in ["15m", "30m"]:
            max_days = 365
            max_range_text = "1 year"
        else:
            max_days = 1095
            max_range_text = "3 years"
        if days_diff > max_days:
            return jsonify(
                {
                    "code": 0,
                    "msg": f"Backtest range exceeds limit: timeframe {timeframe} supports up to {max_range_text} ({max_days} days), but you selected {days_diff} days",
                    "data": None,
                }
            ), 400

        svc = get_backtest_service()
        result = svc.run_strategy_snapshot(snapshot, start_date=start_date, end_date=end_date)
        run_id = svc.persist_run(
            user_id=user_id,
            indicator_id=snapshot.get("indicator_id"),
            strategy_id=snapshot.get("strategy_id"),
            strategy_name=snapshot.get("strategy_name") or "",
            run_type=snapshot.get("run_type") or "strategy_indicator",
            market=snapshot.get("market") or "",
            symbol=snapshot.get("symbol") or "",
            timeframe=snapshot.get("timeframe") or "",
            start_date_str=start_date_str,
            end_date_str=end_date_str,
            initial_capital=float(snapshot.get("initial_capital") or 0),
            commission=float(snapshot.get("commission") or 0),
            slippage=float(snapshot.get("slippage") or 0),
            leverage=int(snapshot.get("leverage") or 1),
            trade_direction=str(snapshot.get("trade_direction") or "long"),
            strategy_config=snapshot.get("strategy_config") or {},
            config_snapshot=snapshot.get("config_snapshot") or {},
            status="success",
            error_message="",
            result=result,
            code=snapshot.get("code") or "",
        )
        return jsonify({"code": 1, "msg": "success", "data": {"runId": run_id, "result": result}})
    except ValueError as e:
        return jsonify({"code": 0, "msg": str(e), "data": None}), 400
    except Exception as e:
        logger.error(f"run_strategy_backtest failed: {str(e)}")
        logger.error(traceback.format_exc())
        try:
            payload = payload if isinstance(payload, dict) else {}
            strategy_id = int(payload.get("strategyId") or 0)
            strategy = get_strategy_service().get_strategy(strategy_id, user_id=g.user_id) if strategy_id else None
            if strategy:
                resolver = StrategySnapshotResolver(user_id=g.user_id)
                snapshot = resolver.resolve(strategy, payload.get("overrideConfig") or {})
                snapshot["user_id"] = g.user_id
                get_backtest_service().persist_run(
                    user_id=g.user_id,
                    indicator_id=snapshot.get("indicator_id"),
                    strategy_id=snapshot.get("strategy_id"),
                    strategy_name=snapshot.get("strategy_name") or "",
                    run_type=snapshot.get("run_type") or "strategy_indicator",
                    market=snapshot.get("market") or "",
                    symbol=snapshot.get("symbol") or "",
                    timeframe=snapshot.get("timeframe") or "",
                    start_date_str=str(payload.get("startDate") or ""),
                    end_date_str=str(payload.get("endDate") or ""),
                    initial_capital=float(snapshot.get("initial_capital") or 0),
                    commission=float(snapshot.get("commission") or 0),
                    slippage=float(snapshot.get("slippage") or 0),
                    leverage=int(snapshot.get("leverage") or 1),
                    trade_direction=str(snapshot.get("trade_direction") or "long"),
                    strategy_config=snapshot.get("strategy_config") or {},
                    config_snapshot=snapshot.get("config_snapshot") or {},
                    status="failed",
                    error_message=str(e),
                    result=None,
                    code=snapshot.get("code") or "",
                )
        except Exception:
            pass
        return jsonify({"code": 0, "msg": str(e), "data": None}), 500


@strategy_bp.route("/strategies/backtest/history", methods=["GET"])
@login_required
def get_strategy_backtest_history():
    try:
        user_id = g.user_id
        strategy_id = int(request.args.get("strategyId") or request.args.get("id") or 0)
        if not strategy_id:
            return jsonify({"code": 0, "msg": "strategyId is required", "data": None}), 400
        limit = max(1, min(int(request.args.get("limit") or 50), 200))
        offset = max(0, int(request.args.get("offset") or 0))
        symbol = (request.args.get("symbol") or "").strip()
        market = (request.args.get("market") or "").strip()
        timeframe = (request.args.get("timeframe") or "").strip()
        rows = get_backtest_service().list_runs(
            user_id=user_id,
            strategy_id=strategy_id,
            limit=limit,
            offset=offset,
            symbol=symbol,
            market=market,
            timeframe=timeframe,
        )
        rows = [r for r in rows if str(r.get("run_type") or "").startswith("strategy_")]
        return jsonify({"code": 1, "msg": "success", "data": rows})
    except Exception as e:
        logger.error(f"get_strategy_backtest_history failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": None}), 500


@strategy_bp.route("/strategies/backtest/get", methods=["GET"])
@login_required
def get_strategy_backtest_run():
    try:
        user_id = g.user_id
        run_id = int(request.args.get("runId") or 0)
        if not run_id:
            return jsonify({"code": 0, "msg": "runId is required", "data": None}), 400
        row = get_backtest_service().get_run(user_id=user_id, run_id=run_id)
        if not row or not str(row.get("run_type") or "").startswith("strategy_"):
            return jsonify({"code": 0, "msg": "run not found", "data": None}), 404
        return jsonify({"code": 1, "msg": "success", "data": row})
    except Exception as e:
        logger.error(f"get_strategy_backtest_run failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": None}), 500


@strategy_bp.route("/strategies/create", methods=["POST"])
@login_required
def create_strategy():
    try:
        user_id = g.user_id
        payload = request.get_json() or {}
        # Use current user's ID
        payload["user_id"] = user_id
        payload["strategy_type"] = payload.get("strategy_type") or "IndicatorStrategy"
        new_id = get_strategy_service().create_strategy(payload)
        return jsonify({"code": 1, "msg": "success", "data": {"id": new_id}})
    except Exception as e:
        logger.error(f"create_strategy failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": None}), 500


@strategy_bp.route("/strategies/batch-create", methods=["POST"])
@login_required
def batch_create_strategies():
    """
    Batch create strategies (multiple symbols)

    Request body:
        strategy_name: Base strategy name
        symbols: Array of symbols, e.g. ["Crypto:BTC/USDT", "Crypto:ETH/USDT"]
        ... other strategy config
    """
    try:
        user_id = g.user_id
        payload = request.get_json() or {}
        payload["user_id"] = user_id
        payload["strategy_type"] = payload.get("strategy_type") or "IndicatorStrategy"

        result = get_strategy_service().batch_create_strategies(payload)

        if result["success"]:
            return jsonify(
                {"code": 1, "msg": f"Successfully created {result['total_created']} strategies", "data": result}
            )
        else:
            return jsonify({"code": 0, "msg": "Batch creation failed", "data": result})
    except Exception as e:
        logger.error(f"batch_create_strategies failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": None}), 500


@strategy_bp.route("/strategies/batch-start", methods=["POST"])
@login_required
def batch_start_strategies():
    """
    Batch start strategies

    Request body:
        strategy_ids: Array of strategy IDs
        or
        strategy_group_id: Strategy group ID
    """
    try:
        user_id = g.user_id
        payload = request.get_json() or {}
        strategy_ids = payload.get("strategy_ids") or []
        strategy_group_id = payload.get("strategy_group_id")

        # If strategy_group_id provided, get all strategies in the group
        if strategy_group_id and not strategy_ids:
            strategy_ids = get_strategy_service().get_strategies_by_group(strategy_group_id, user_id=user_id)

        if not strategy_ids:
            return jsonify({"code": 0, "msg": "Please provide strategy IDs", "data": None}), 400

        # Update database status first
        result = get_strategy_service().batch_start_strategies(strategy_ids, user_id=user_id)

        # Then start executor
        executor = get_trading_executor()
        for sid in result.get("success_ids", []):
            try:
                executor.start_strategy(sid)
            except Exception as e:
                logger.error(f"Failed to start executor for strategy {sid}: {e}")

        return jsonify(
            {
                "code": 1 if result["success"] else 0,
                "msg": f"Successfully started {len(result.get('success_ids', []))} strategies",
                "data": result,
            }
        )
    except Exception as e:
        logger.error(f"batch_start_strategies failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": None}), 500


@strategy_bp.route("/strategies/batch-stop", methods=["POST"])
@login_required
def batch_stop_strategies():
    """
    Batch stop strategies

    Request body:
        strategy_ids: Array of strategy IDs
        or
        strategy_group_id: Strategy group ID
    """
    try:
        user_id = g.user_id
        payload = request.get_json() or {}
        strategy_ids = payload.get("strategy_ids") or []
        strategy_group_id = payload.get("strategy_group_id")

        if strategy_group_id and not strategy_ids:
            strategy_ids = get_strategy_service().get_strategies_by_group(strategy_group_id, user_id=user_id)

        if not strategy_ids:
            return jsonify({"code": 0, "msg": "Please provide strategy IDs", "data": None}), 400

        # Stop executor first
        executor = get_trading_executor()
        for sid in strategy_ids:
            try:
                executor.stop_strategy(sid)
            except Exception as e:
                logger.error(f"Failed to stop executor for strategy {sid}: {e}")

        # Then update database status
        result = get_strategy_service().batch_stop_strategies(strategy_ids, user_id=user_id)

        return jsonify(
            {
                "code": 1 if result["success"] else 0,
                "msg": f"Successfully stopped {len(result.get('success_ids', []))} strategies",
                "data": result,
            }
        )
    except Exception as e:
        logger.error(f"batch_stop_strategies failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": None}), 500


@strategy_bp.route("/strategies/batch-delete", methods=["DELETE"])
@login_required
def batch_delete_strategies():
    """
    Batch delete strategies

    Request body:
        strategy_ids: Array of strategy IDs
        or
        strategy_group_id: Strategy group ID
    """
    try:
        user_id = g.user_id
        payload = request.get_json() or {}
        strategy_ids = payload.get("strategy_ids") or []
        strategy_group_id = payload.get("strategy_group_id")

        if strategy_group_id and not strategy_ids:
            strategy_ids = get_strategy_service().get_strategies_by_group(strategy_group_id, user_id=user_id)

        if not strategy_ids:
            return jsonify({"code": 0, "msg": "Please provide strategy IDs", "data": None}), 400

        # Stop executor first
        executor = get_trading_executor()
        for sid in strategy_ids:
            try:
                executor.stop_strategy(sid)
            except Exception:
                pass  # Ignore stop errors

        # Then delete
        result = get_strategy_service().batch_delete_strategies(strategy_ids, user_id=user_id)

        return jsonify(
            {
                "code": 1 if result["success"] else 0,
                "msg": f"Successfully deleted {len(result.get('success_ids', []))} strategies",
                "data": result,
            }
        )
    except Exception as e:
        logger.error(f"batch_delete_strategies failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": None}), 500


@strategy_bp.route("/strategies/update", methods=["PUT"])
@login_required
def update_strategy():
    try:
        user_id = g.user_id
        strategy_id = request.args.get("id", type=int)
        if not strategy_id:
            return jsonify({"code": 0, "msg": "Missing strategy id parameter", "data": None}), 400
        payload = request.get_json() or {}
        ok = get_strategy_service().update_strategy(strategy_id, payload, user_id=user_id)
        if not ok:
            return jsonify({"code": 0, "msg": "Strategy not found", "data": None}), 404
        return jsonify({"code": 1, "msg": "success", "data": None})
    except Exception as e:
        logger.error(f"update_strategy failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": None}), 500


@strategy_bp.route("/strategies/delete", methods=["DELETE"])
@login_required
def delete_strategy():
    try:
        user_id = g.user_id
        strategy_id = request.args.get("id", type=int)
        if not strategy_id:
            return jsonify({"code": 0, "msg": "Missing strategy id parameter", "data": None}), 400
        ok = get_strategy_service().delete_strategy(strategy_id, user_id=user_id)
        return jsonify({"code": 1 if ok else 0, "msg": "success" if ok else "failed", "data": None})
    except Exception as e:
        logger.error(f"delete_strategy failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": None}), 500


@strategy_bp.route("/strategies/trades", methods=["GET"])
@login_required
def get_trades():
    """Get trade records for the current user's strategy."""
    try:
        user_id = g.user_id
        strategy_id = request.args.get("id", type=int)
        if not strategy_id:
            return jsonify(
                {"code": 0, "msg": "Missing strategy id parameter", "data": {"trades": [], "items": []}}
            ), 400

        # Verify strategy belongs to user
        st = get_strategy_service().get_strategy(strategy_id, user_id=user_id)
        if not st:
            return jsonify({"code": 0, "msg": "Strategy not found", "data": {"trades": [], "items": []}}), 404

        with get_db_connection() as db:
            cur = db.cursor()
            cur.execute(
                """
                SELECT id, strategy_id, symbol, type, price, amount, value, commission, commission_ccy, profit, created_at
                FROM qd_strategy_trades
                WHERE strategy_id = ?
                ORDER BY id DESC
                """,
                (strategy_id,),
            )
            rows = cur.fetchall() or []
            cur.close()

        # Convert created_at to UTC timestamp (seconds) for frontend
        # This ensures consistent timezone handling
        processed_rows = []
        for row in rows:
            trade = dict(row)
            created_at = trade.get("created_at")
            if created_at:
                if hasattr(created_at, "timestamp"):
                    # datetime object - convert to UTC timestamp
                    trade["created_at"] = int(created_at.timestamp())
                elif isinstance(created_at, str):
                    # ISO string - parse and convert
                    try:
                        from datetime import datetime

                        dt = datetime.fromisoformat(created_at.replace("Z", "+00:00"))
                        trade["created_at"] = int(dt.timestamp())
                    except Exception:
                        pass
            processed_rows.append(trade)

        # Frontend expects data.trades; keep data.items for compatibility with list-style components.
        return jsonify({"code": 1, "msg": "success", "data": {"trades": processed_rows, "items": processed_rows}})
    except Exception as e:
        logger.error(f"get_trades failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": {"trades": [], "items": []}}), 500


@strategy_bp.route("/strategies/positions", methods=["GET"])
@login_required
def get_positions():
    """Get position records for the current user's strategy."""
    try:
        user_id = g.user_id
        strategy_id = request.args.get("id", type=int)
        if not strategy_id:
            return jsonify(
                {"code": 0, "msg": "Missing strategy id parameter", "data": {"positions": [], "items": []}}
            ), 400

        # Verify strategy belongs to user
        st = get_strategy_service().get_strategy(strategy_id, user_id=user_id)
        if not st:
            return jsonify({"code": 0, "msg": "Strategy not found", "data": {"positions": [], "items": []}}), 404

        with get_db_connection() as db:
            cur = db.cursor()
            cur.execute(
                """
                SELECT id, strategy_id, symbol, side, size, entry_price, current_price, highest_price,
                       unrealized_pnl, pnl_percent, equity, updated_at
                FROM qd_strategy_positions
                WHERE strategy_id = ?
                ORDER BY id DESC
                """,
                (strategy_id,),
            )
            rows = cur.fetchall() or []
            cur.close()

        # Sync current price and PnL on read (frontend polls every few seconds).
        def _calc_unrealized_pnl(side: str, entry_price: float, current_price: float, size: float) -> float:
            ep = float(entry_price or 0.0)
            cp = float(current_price or 0.0)
            sz = float(size or 0.0)
            if ep <= 0 or cp <= 0 or sz <= 0:
                return 0.0
            s = (side or "").strip().lower()
            if s == "short":
                return (ep - cp) * sz
            return (cp - ep) * sz

        def _calc_pnl_percent(entry_price: float, size: float, pnl: float) -> float:
            ep = float(entry_price or 0.0)
            sz = float(size or 0.0)
            denom = ep * sz
            if denom <= 0:
                return 0.0
            return float(pnl) / denom * 100.0

        now = int(time.time())
        # Fetch prices once per symbol to reduce API calls.
        sym_to_price: dict[str, float] = {}
        ds = DataSourceFactory.get_source("Crypto")
        for r in rows:
            sym = (r.get("symbol") or "").strip()
            if not sym:
                continue
            if sym in sym_to_price:
                continue
            try:
                t = ds.get_ticker(sym) or {}
                px = float(t.get("last") or t.get("close") or 0.0)
                if px > 0:
                    sym_to_price[sym] = px
            except Exception:
                continue

        # Apply to rows and persist best-effort
        out = []
        with get_db_connection() as db:
            cur = db.cursor()
            for r in rows:
                sym = (r.get("symbol") or "").strip()
                side = (r.get("side") or "").strip().lower()
                entry = float(r.get("entry_price") or 0.0)
                size = float(r.get("size") or 0.0)
                cp = float(sym_to_price.get(sym) or r.get("current_price") or 0.0)
                pnl = _calc_unrealized_pnl(side, entry, cp, size)
                pct = _calc_pnl_percent(entry, size, pnl)

                rr = dict(r)
                # Make sure entry_price has a value (if it is NULL in the database, use the calculated entry value)
                if not rr.get("entry_price") or float(rr.get("entry_price") or 0.0) <= 0:
                    rr["entry_price"] = float(entry or 0.0)
                else:
                    rr["entry_price"] = float(rr.get("entry_price") or 0.0)
                rr["current_price"] = float(cp or 0.0)
                rr["unrealized_pnl"] = float(pnl)
                rr["pnl_percent"] = float(pct)
                rr["updated_at"] = now
                out.append(rr)

                try:
                    cur.execute(
                        """
                        UPDATE qd_strategy_positions
                        SET current_price = ?, unrealized_pnl = ?, pnl_percent = ?, updated_at = NOW()
                        WHERE id = ?
                        """,
                        (float(cp or 0.0), float(pnl), float(pct), int(rr.get("id"))),
                    )
                except Exception:
                    pass
            db.commit()
            cur.close()

        return jsonify({"code": 1, "msg": "success", "data": {"positions": out, "items": out}})
    except Exception as e:
        logger.error(f"get_positions failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": {"positions": [], "items": []}}), 500


@strategy_bp.route("/strategies/equityCurve", methods=["GET"])
@login_required
def get_equity_curve():
    """Get equity curve for the current user's strategy."""
    try:
        user_id = g.user_id
        strategy_id = request.args.get("id", type=int)
        if not strategy_id:
            return jsonify({"code": 0, "msg": "Missing strategy id parameter", "data": []}), 400

        st = get_strategy_service().get_strategy(strategy_id, user_id=user_id) or {}
        if not st:
            return jsonify({"code": 0, "msg": "Strategy not found", "data": []}), 404
        initial = float(st.get("initial_capital") or (st.get("trading_config") or {}).get("initial_capital") or 0)
        if initial <= 0:
            initial = 1000.0

        with get_db_connection() as db:
            cur = db.cursor()
            cur.execute(
                """
                SELECT created_at, profit
                FROM qd_strategy_trades
                WHERE strategy_id = ?
                ORDER BY created_at ASC
                """,
                (strategy_id,),
            )
            rows = cur.fetchall() or []
            cur.execute(
                """
                SELECT COALESCE(SUM(unrealized_pnl), 0) AS u
                FROM qd_strategy_positions
                WHERE strategy_id = ?
                """,
                (strategy_id,),
            )
            prow = cur.fetchone() or {}
            cur.close()

        equity = initial
        curve = []
        for r in rows:
            try:
                equity += float(r.get("profit") or 0)
            except Exception:
                pass
            created_at = r.get("created_at")
            if created_at and hasattr(created_at, "timestamp"):
                ts = int(created_at.timestamp())
            elif created_at:
                ts = int(created_at)
            else:
                ts = int(time.time())
            curve.append({"time": ts, "equity": round(equity, 2)})

        # 将未实现盈亏并入曲线末端，便于「持仓中」也能在绩效里看到浮动权益
        try:
            unreal = float(prow.get("u") or prow.get("U") or 0)
        except Exception:
            unreal = 0.0
        live_equity = float(equity) + unreal
        now_ts = int(time.time())
        if abs(unreal) > 1e-12 or not curve:
            curve.append({"time": now_ts, "equity": round(live_equity, 2)})

        return jsonify({"code": 1, "msg": "success", "data": curve})
    except Exception as e:
        logger.error(f"get_equity_curve failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": []}), 500


@strategy_bp.route("/strategies/stop", methods=["POST"])
@login_required
def stop_strategy():
    """
    Stop a strategy for the current user.

    Params:
        id: Strategy ID
    """
    try:
        user_id = g.user_id
        strategy_id = request.args.get("id", type=int)

        if not strategy_id:
            return jsonify({"code": 0, "msg": "Missing strategy id parameter", "data": None}), 400

        # Verify strategy belongs to user
        st = get_strategy_service().get_strategy(strategy_id, user_id=user_id)
        if not st:
            return jsonify({"code": 0, "msg": "Strategy not found", "data": None}), 404

        # Get strategy type
        strategy_type = get_strategy_service().get_strategy_type(strategy_id)

        # Local backend: AI strategy executor was removed. Only indicator strategies are supported.
        if strategy_type == "PromptBasedStrategy":
            return jsonify(
                {
                    "code": 0,
                    "msg": "AI strategy has been removed; local edition does not support starting/stopping AI strategies",
                    "data": None,
                }
            ), 400

        # Indicator strategy
        get_trading_executor().stop_strategy(strategy_id)

        # Update strategy status
        get_strategy_service().update_strategy_status(strategy_id, "stopped", user_id=user_id)

        return jsonify({"code": 1, "msg": "Stopped successfully", "data": None})

    except Exception as e:
        logger.error(f"Failed to stop strategy: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": f"Failed to stop strategy: {str(e)}", "data": None}), 500


@strategy_bp.route("/strategies/start", methods=["POST"])
@login_required
def start_strategy():
    """
    Start a strategy for the current user.

    Params:
        id: Strategy ID
    """
    try:
        user_id = g.user_id
        strategy_id = request.args.get("id", type=int)

        if not strategy_id:
            return jsonify({"code": 0, "msg": "Missing strategy id parameter", "data": None}), 400

        # Verify strategy belongs to user
        st = get_strategy_service().get_strategy(strategy_id, user_id=user_id)
        if not st:
            return jsonify({"code": 0, "msg": "Strategy not found", "data": None}), 404

        # Get strategy type
        strategy_type = get_strategy_service().get_strategy_type(strategy_id)

        # IndicatorStrategy and ScriptStrategy are executed by TradingExecutor.
        if strategy_type == "PromptBasedStrategy":
            return jsonify(
                {
                    "code": 0,
                    "msg": "AI strategy has been removed; local edition does not support starting AI strategies",
                    "data": None,
                }
            ), 400
        get_strategy_service().update_strategy_status(strategy_id, "running", user_id=user_id)

        success = get_trading_executor().start_strategy(strategy_id)

        if not success:
            # If start failed, restore status
            get_strategy_service().update_strategy_status(strategy_id, "stopped", user_id=user_id)
            return jsonify({"code": 0, "msg": "Failed to start strategy executor", "data": None}), 500

        return jsonify({"code": 1, "msg": "Started successfully", "data": None})

    except Exception as e:
        logger.error(f"Failed to start strategy: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": f"Failed to start strategy: {str(e)}", "data": None}), 500


@strategy_bp.route("/strategies/test-connection", methods=["POST"])
@login_required
def test_connection():
    """
    Test exchange connection.

    Request body:
        exchange_config: Exchange configuration (may contain credential_id or inline keys)
    """
    try:
        data = request.get_json() or {}

        # Log request data (for debugging, but do not log sensitive information)
        logger.debug(f"Connection test request keys: {list(data.keys())}")

        # Get exchange configuration
        exchange_config = data.get("exchange_config", data)

        # Local deployment: no encryption/decryption; accept dict or JSON string.
        if isinstance(exchange_config, str):
            try:
                import json

                exchange_config = json.loads(exchange_config)
            except Exception:
                pass

        # Verify exchange_config is a dictionary
        if not isinstance(exchange_config, dict):
            logger.error(f"Invalid exchange_config type: {type(exchange_config)}, data: {str(exchange_config)[:200]}")
            # Frontend expects HTTP 200 with {code:0} for business failures.
            return jsonify(
                {"code": 0, "msg": "Invalid exchange config format; please check your payload", "data": None}
            )

        # Resolve credential_id → full config (merges credential keys with any overrides).
        # This allows the frontend to send just {credential_id: 5} without raw api_key/secret_key.
        from app.services.exchange_execution import resolve_exchange_config

        user_id = g.user_id if hasattr(g, "user_id") else 1
        resolved = resolve_exchange_config(exchange_config, user_id=user_id)

        # Verify required fields (check resolved config after credential merge)
        if not resolved.get("exchange_id"):
            return jsonify({"code": 0, "msg": "Please select an exchange", "data": None})

        api_key = resolved.get("api_key", "")
        secret_key = resolved.get("secret_key", "")

        # Detailed log troubleshooting
        logger.info(f"Testing connection: exchange_id={resolved.get('exchange_id')}")
        if api_key:
            logger.info(f"API Key: {api_key[:5]}... (len={len(api_key)})")
        if secret_key:
            logger.info(f"Secret Key: {secret_key[:5]}... (len={len(secret_key)})")

        # Check if there are special characters
        if api_key and api_key.strip() != api_key:
            logger.warning("API key contains leading/trailing whitespace")
        if secret_key and secret_key.strip() != secret_key:
            logger.warning("Secret key contains leading/trailing whitespace")

        if not api_key or not secret_key:
            return jsonify({"code": 0, "msg": "Please provide API key and secret key", "data": None})

        # Pass the resolved config (with actual keys) to the service
        result = get_strategy_service().test_exchange_connection(resolved, user_id=user_id)

        if result["success"]:
            return jsonify(
                {"code": 1, "msg": result.get("message") or "Connection successful", "data": result.get("data")}
            )
        # Always return HTTP 200 for business-level failures.
        return jsonify({"code": 0, "msg": result.get("message") or "Connection failed", "data": result.get("data")})

    except Exception as e:
        logger.error(f"Connection test failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": f"Connection test failed: {str(e)}", "data": None}), 500


@strategy_bp.route("/strategies/get-symbols", methods=["POST"])
@login_required
def get_symbols():
    """
    Get exchange trading pairs list.

    Request body:
        exchange_config: Exchange configuration
    """
    try:
        data = request.get_json() or {}
        exchange_config = data.get("exchange_config", data)

        result = get_strategy_service().get_exchange_symbols(exchange_config)

        if result["success"]:
            return jsonify({"code": 1, "msg": result["message"], "data": {"symbols": result["symbols"]}})
        else:
            return jsonify({"code": 0, "msg": result["message"], "data": {"symbols": []}})

    except Exception as e:
        logger.error(f"Failed to fetch symbols: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": f"Failed to fetch symbols: {str(e)}", "data": {"symbols": []}}), 500


@strategy_bp.route("/strategies/preview-compile", methods=["POST"])
@login_required
def preview_compile():
    """
    Preview compiled strategy result.
    """
    try:
        data = request.get_json() or {}
        # strategy_config is passed as 'config'
        config = data.get("config")

        if not config:
            return jsonify({"code": 0, "msg": "Missing config"}), 400

        # Compile
        compiler = StrategyCompiler()
        try:
            code = compiler.compile(config)
        except Exception as e:
            return jsonify({"code": 0, "msg": f"Compilation failed: {str(e)}"}), 400

        # Execute
        symbol = config.get("symbol", "BTC/USDT")
        timeframe = config.get("timeframe", "4h")

        backtest_service = BacktestService()
        result = backtest_service.run_code_strategy(code=code, symbol=symbol, timeframe=timeframe, limit=500)

        if result.get("error"):
            return jsonify({"code": 0, "msg": f"Execution failed: {result['error']}"}), 400

        return jsonify({"code": 1, "msg": "Success", "data": result})

    except Exception as e:
        logger.error(f"Preview failed: {e}")
        return jsonify({"code": 0, "msg": str(e)}), 500


@strategy_bp.route("/strategies/notifications", methods=["GET"])
@login_required
def get_strategy_notifications():
    """
    Strategy signal notifications for the current user.

    Query:
      - id: strategy id (optional)
      - limit: default 50, max 200
      - since_id: return rows with id > since_id (optional)
    """
    try:
        user_id = g.user_id
        strategy_id = request.args.get("id", type=int)
        limit = request.args.get("limit", type=int) or 50
        limit = max(1, min(200, int(limit)))
        since_id = request.args.get("since_id", type=int) or 0

        # Get user's strategy IDs for filtering notifications
        user_strategy_ids = []
        with get_db_connection() as db:
            cur = db.cursor()
            cur.execute("SELECT id FROM qd_strategies_trading WHERE user_id = ?", (user_id,))
            rows = cur.fetchall() or []
            user_strategy_ids = [r.get("id") for r in rows if r.get("id")]
            cur.close()

        where = []
        args = []

        # Filter by user's strategies
        if strategy_id:
            if strategy_id in user_strategy_ids:
                where.append("strategy_id = ?")
                args.append(int(strategy_id))
            else:
                return jsonify({"code": 1, "msg": "success", "data": {"items": []}})
        else:
            if user_strategy_ids:
                placeholders = ",".join(["?"] * len(user_strategy_ids))
                where.append(f"(strategy_id IN ({placeholders}) OR (strategy_id IS NULL AND user_id = ?))")
                args.extend(user_strategy_ids)
                args.append(user_id)
            else:
                # Only portfolio monitor notifications (strategy_id is NULL)
                where.append("strategy_id IS NULL AND user_id = ?")
                args.append(user_id)

        if since_id:
            where.append("id > ?")
            args.append(int(since_id))
        where_sql = ("WHERE " + " AND ".join(where)) if where else ""

        with get_db_connection() as db:
            cur = db.cursor()
            cur.execute(
                f"""
                SELECT *
                FROM qd_strategy_notifications
                {where_sql}
                ORDER BY id DESC
                LIMIT ?
                """,
                tuple(args + [int(limit)]),
            )
            rows = cur.fetchall() or []
            cur.close()

        # Convert created_at to UTC timestamp (seconds) for frontend
        from datetime import timezone as _dt_tz

        processed_rows = []
        for row in rows:
            item = dict(row)
            created_at = item.get("created_at")
            if created_at:
                if hasattr(created_at, "timestamp"):
                    # No time zone datetime: The connection has SET TIME ZONE UTC, interpret it according to UTC and then transfer to Unix to avoid misjudgment of the local TZ on the server side.
                    if getattr(created_at, "tzinfo", None) is None:
                        created_at = created_at.replace(tzinfo=_dt_tz.utc)
                    item["created_at"] = int(created_at.timestamp())
                elif isinstance(created_at, str):
                    try:
                        from datetime import datetime

                        dt = datetime.fromisoformat(created_at.replace("Z", "+00:00"))
                        item["created_at"] = int(dt.timestamp())
                    except Exception:
                        pass
            processed_rows.append(item)

        return jsonify({"code": 1, "msg": "success", "data": {"items": processed_rows}})
    except Exception as e:
        logger.error(f"get_strategy_notifications failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": {"items": []}}), 500


@strategy_bp.route("/strategies/notifications/unread-count", methods=["GET"])
@login_required
def get_unread_notification_count():
    """
    Get unread notification count for the current user.
    Used by frontend header badge (cap at 99+ on UI).
    """
    try:
        user_id = g.user_id

        with get_db_connection() as db:
            cur = db.cursor()
            cur.execute("SELECT id FROM qd_strategies_trading WHERE user_id = ?", (user_id,))
            rows = cur.fetchall() or []
            user_strategy_ids = [r.get("id") for r in rows if r.get("id")]
            cur.close()

        where = ["is_read = 0"]
        args = []

        if user_strategy_ids:
            placeholders = ",".join(["?"] * len(user_strategy_ids))
            where.append(f"(strategy_id IN ({placeholders}) OR (strategy_id IS NULL AND user_id = ?))")
            args.extend(user_strategy_ids)
            args.append(user_id)
        else:
            where.append("strategy_id IS NULL AND user_id = ?")
            args.append(user_id)

        where_sql = "WHERE " + " AND ".join(where)

        with get_db_connection() as db:
            cur = db.cursor()
            cur.execute(
                f"SELECT COUNT(1) AS cnt FROM qd_strategy_notifications {where_sql}",
                tuple(args),
            )
            cnt = int((cur.fetchone() or {}).get("cnt") or 0)
            cur.close()

        return jsonify({"code": 1, "msg": "success", "data": {"unread": cnt}})
    except Exception as e:
        logger.error(f"get_unread_notification_count failed: {str(e)}")
        logger.error(traceback.format_exc())
        return jsonify({"code": 0, "msg": str(e), "data": {"unread": 0}}), 500


@strategy_bp.route("/strategies/notifications/read", methods=["POST"])
@login_required
def mark_notification_read():
    """Mark a single notification as read for the current user."""
    try:
        user_id = g.user_id
        data = request.get_json(force=True, silent=True) or {}
        notification_id = data.get("id")
        if not notification_id:
            return jsonify({"code": 0, "msg": "Missing id"}), 400

        # Update notifications for user's strategies OR portfolio monitor notifications
        with get_db_connection() as db:
            cur = db.cursor()
            cur.execute(
                """
                UPDATE qd_strategy_notifications SET is_read = 1
                WHERE id = ? AND (
                    strategy_id IN (SELECT id FROM qd_strategies_trading WHERE user_id = ?)
                    OR (strategy_id IS NULL AND user_id = ?)
                )
                """,
                (int(notification_id), user_id, user_id),
            )
            db.commit()
            cur.close()

        return jsonify({"code": 1, "msg": "success"})
    except Exception as e:
        logger.error(f"mark_notification_read failed: {str(e)}")
        return jsonify({"code": 0, "msg": str(e)}), 500


@strategy_bp.route("/strategies/notifications/read-all", methods=["POST"])
@login_required
def mark_all_notifications_read():
    """Mark all notifications as read for the current user."""
    try:
        user_id = g.user_id
        with get_db_connection() as db:
            cur = db.cursor()
            cur.execute(
                """
                UPDATE qd_strategy_notifications SET is_read = 1
                WHERE strategy_id IN (SELECT id FROM qd_strategies_trading WHERE user_id = ?)
                   OR (strategy_id IS NULL AND user_id = ?)
                """,
                (user_id, user_id),
            )
            db.commit()
            cur.close()

        return jsonify({"code": 1, "msg": "success"})
    except Exception as e:
        logger.error(f"mark_all_notifications_read failed: {str(e)}")
        return jsonify({"code": 0, "msg": str(e)}), 500


@strategy_bp.route("/strategies/notifications/clear", methods=["DELETE"])
@login_required
def clear_notifications():
    """Clear all notifications for the current user."""
    try:
        user_id = g.user_id
        with get_db_connection() as db:
            cur = db.cursor()
            cur.execute(
                """
                DELETE FROM qd_strategy_notifications
                WHERE strategy_id IN (SELECT id FROM qd_strategies_trading WHERE user_id = ?)
                   OR (strategy_id IS NULL AND user_id = ?)
                """,
                (user_id, user_id),
            )
            db.commit()
            cur.close()

        return jsonify({"code": 1, "msg": "success"})
    except Exception as e:
        logger.error(f"clear_notifications failed: {str(e)}")
        return jsonify({"code": 0, "msg": str(e)}), 500


# ===== Script Strategy Endpoints =====


@strategy_bp.route("/strategies/verify-code", methods=["POST"])
@login_required
def verify_strategy_code():
    """Verify script strategy code syntax and safety."""
    try:
        payload = request.get_json() or {}
        code = payload.get("code", "")
        if not code.strip():
            return jsonify({"success": False, "message": "Code is empty"})

        required_funcs = ["on_bar", "on_init"]
        found = [f for f in required_funcs if f"def {f}" in code]
        missing = [f for f in required_funcs if f not in found]

        if missing:
            return jsonify({"success": False, "message": f"Missing required functions: {', '.join(missing)}"})

        try:
            compile(code, "<strategy>", "exec")
        except SyntaxError as se:
            return jsonify({"success": False, "message": f"Syntax error at line {se.lineno}: {se.msg}"})

        return jsonify({"success": True, "message": "Code verification passed"})
    except Exception as e:
        logger.error(f"verify_strategy_code failed: {str(e)}")
        return jsonify({"success": False, "message": str(e)})


@strategy_bp.route("/strategies/ai-generate", methods=["POST"])
@login_required
def ai_generate_strategy():
    """Generate strategy code or suggest template parameter updates using AI."""
    try:
        payload = request.get_json() or {}
        prompt = payload.get("prompt", "")
        if not prompt.strip():
            return jsonify({"code": "", "msg": "Prompt is empty", "params": None})

        intent = (payload.get("intent") or "generate_code").strip()
        from app.services.llm import LLMService

        llm = LLMService()
        api_key = llm.get_api_key()
        if not api_key:
            return jsonify({"code": "", "msg": "No LLM API key configured", "params": None})

        if intent == "adjust_params":
            template_key = payload.get("template_key") or ""
            current_params = payload.get("params") or {}
            code_snapshot = (payload.get("code") or "")[:8000]
            system_prompt = """You tune quantitative strategy template parameters from the user's request.
Return ONLY a single JSON object: keys are parameter names (strings), values are JSON numbers or booleans.
You may return a partial object (only keys that should change) or a full object.
Do not use markdown fences, do not add explanations before or after the JSON."""

            user_content = (
                f"Template key: {template_key}\n"
                f"Current parameters (JSON):\n{json.dumps(current_params, ensure_ascii=False)}\n\n"
                f"Strategy code excerpt (context):\n{code_snapshot}\n\n"
                f"User request:\n{prompt.strip()}\n\n"
                "Respond with JSON only."
            )

            content = llm.call_llm_api(
                messages=[
                    {"role": "system", "content": system_prompt},
                    {"role": "user", "content": user_content},
                ],
                model=llm.get_code_generation_model(),
                temperature=0.3,
                use_json_mode=False,
            )

            raw = (content or "").strip()
            if raw.startswith("```"):
                raw = re.sub(r"^```[a-zA-Z]*", "", raw).strip()
                if raw.endswith("```"):
                    raw = raw[:-3].strip()
            updates = None
            try:
                updates = json.loads(raw)
            except json.JSONDecodeError:
                m = re.search(r"\{[\s\S]*\}", raw)
                if m:
                    try:
                        updates = json.loads(m.group(0))
                    except json.JSONDecodeError:
                        updates = None
            if not isinstance(updates, dict):
                return jsonify({"code": "", "params": None, "msg": "AI did not return valid JSON parameters"})
            return jsonify({"code": "", "params": updates, "msg": "success"})

        system_prompt = """You are a quantitative trading strategy code generator.
Generate Python strategy code that follows this framework:
- def on_init(ctx): Initialize strategy parameters using ctx.param(name, default)
- def on_bar(ctx, bar): Core logic called on each K-line bar
  - bar supports both bar.close and bar['close'] access, and has: open, high, low, close, volume, timestamp
  - ctx.buy(price, amount), ctx.sell(price, amount), ctx.close_position()
  - ctx.position supports both numeric checks and dict-style fields:
    - if not ctx.position / if ctx.position > 0 / if ctx.position < 0
    - ctx.position['side'], ctx.position['size'], ctx.position['entry_price']
  - ctx.balance, ctx.equity
  - ctx.bars(n) to get last N bars, ctx.log(message) to log
- def on_order_filled(ctx, order): Optional callback when order fills
- def on_stop(ctx): Optional cleanup when strategy stops

Return ONLY the Python code, no explanations."""

        extra = ""
        template_key = payload.get("template_key")
        params = payload.get("params")
        code_ctx = (payload.get("code") or "").strip()
        if template_key or params is not None or code_ctx:
            extra_parts = []
            if template_key:
                extra_parts.append(f"Current template key: {template_key}")
            if isinstance(params, dict) and params:
                extra_parts.append("Current template parameters (JSON):\n" + json.dumps(params, ensure_ascii=False))
            if code_ctx:
                extra_parts.append("Current code (may be long):\n" + code_ctx[:12000])
            extra = "\n\n" + "\n\n".join(extra_parts)

        user_prompt = prompt.strip() + extra

        content = llm.call_llm_api(
            messages=[
                {"role": "system", "content": system_prompt},
                {"role": "user", "content": user_prompt},
            ],
            model=llm.get_code_generation_model(),
            temperature=0.7,
            use_json_mode=False,
        )

        content = content.strip()
        if content.startswith("```python"):
            content = content[9:]
        elif content.startswith("```"):
            content = content[3:]
        if content.endswith("```"):
            content = content[:-3]
        content = content.strip()

        if content:
            return jsonify({"code": content, "msg": "success", "params": None})
        else:
            return jsonify({"code": "", "msg": "AI generation returned empty result", "params": None})
    except Exception as e:
        logger.error(f"ai_generate_strategy failed: {str(e)}")
        return jsonify({"code": "", "msg": str(e), "params": None})


@strategy_bp.route("/strategies/performance", methods=["GET"])
@login_required
def get_strategy_performance():
    """Get strategy performance metrics (aggregated from equity curve and trades)."""
    try:
        strategy_id = request.args.get("id")
        if not strategy_id:
            return jsonify({"code": 0, "msg": "Strategy ID required"})

        svc = get_strategy_service()
        equity_data = svc.get_equity_curve(int(strategy_id))
        return jsonify({"code": 1, "msg": "success", "data": {"equity_curve": equity_data}})
    except Exception as e:
        logger.error(f"get_strategy_performance failed: {str(e)}")
        return jsonify({"code": 0, "msg": str(e)}), 500


@strategy_bp.route("/strategies/logs", methods=["GET"])
@login_required
def get_strategy_logs():
    """Get strategy running logs."""
    try:
        user_id = g.user_id
        strategy_id = request.args.get("id")
        limit = int(request.args.get("limit", 200))
        if not strategy_id:
            return jsonify({"code": 0, "msg": "Strategy ID required"})

        st = get_strategy_service().get_strategy(int(strategy_id), user_id=user_id)
        if not st:
            return jsonify({"code": 0, "msg": "Strategy not found"}), 404

        with get_db_connection() as db:
            cur = db.cursor()
            cur.execute(
                """
                SELECT id, strategy_id, level, message, timestamp
                FROM qd_strategy_logs
                WHERE strategy_id = ?
                ORDER BY id DESC
                LIMIT ?
                """,
                (int(strategy_id), limit),
            )
            rows = cur.fetchall() or []
            cur.close()

        out = []
        for r in rows or []:
            if not isinstance(r, dict):
                continue
            rr = dict(r)
            ts = rr.get("timestamp")
            if ts is not None and hasattr(ts, "isoformat"):
                rr["timestamp"] = ts.isoformat()
            out.append(rr)
        logs = list(reversed(out))
        return jsonify({"code": 1, "msg": "success", "data": logs})
    except Exception as e:
        if PgUndefinedTable is not None and isinstance(e, PgUndefinedTable):
            return jsonify({"code": 1, "msg": "success", "data": []})
        el = str(e).lower()
        if "qd_strategy_logs" in el and ("does not exist" in el or "no such table" in el):
            return jsonify({"code": 1, "msg": "success", "data": []})
        logger.error(f"get_strategy_logs failed: {str(e)}")
        return jsonify({"code": 0, "msg": str(e)}), 500