"""Trade-by-trade comparison to locate the PnL gap source.

Both sides now produce 92 trades on the same window. This script dumps the
first ~20 trades from each side side-by-side so we can see WHERE the PnL
diverges (entry price? exit price? lots? swap?).
"""
from __future__ import annotations

import sys
from pathlib import Path

PROJECT = Path(__file__).resolve().parent.parent
sys.path.insert(0, str(PROJECT))

import pandas as pd

from shared.core.engine import SizingInputs
from shared.core.metrics import compute_metrics
from shared.data.loaders import load_bars
from shared.data.mt5_report import parse_mt5_report
from strategies.gold_scalper_pro.instruments import XAUUSD_REAL
from strategies.gold_scalper_pro.scalper_engine import (
    ScalperEngine,
    engine_kwargs_from_params,
)
from strategies.gold_scalper_pro.search_space import FROZEN_BASELINE
from strategies.gold_scalper_pro.signals import build_signals


def main() -> int:
    # ── Python trades ─────────────────────────────────────────────────────
    bars = load_bars(PROJECT / "data" / "XAUUSD_M5_2024-06-26_2026-06-26.parquet")
    start = pd.Timestamp("2026-04-16 00:00:00")
    end = pd.Timestamp("2026-05-08 00:00:00")
    window = bars[(bars["timestamp"] >= start) & (bars["timestamp"] < end)].reset_index(drop=True)
    pack = build_signals(FROZEN_BASELINE, window, XAUUSD_REAL)
    engine = ScalperEngine()
    result = engine.run(
        window, pack.signals_long, pack.signals_short,
        pack.sl_prices, pack.tp_prices,
        XAUUSD_REAL, SizingInputs(), 1000.0,
        **engine_kwargs_from_params(FROZEN_BASELINE),
    )
    print("=== Python first 20 trades ===")
    print(f"{'#':>3