#!/usr/bin/env python3
"""Utility script to pull historical bars from MetaTrader 5 into live_store.

Run inside the backend virtualenv with DATA_PROVIDER=metatrader.
"""

import argparse
from datetime import datetime, timedelta

try:
    import MetaTrader5 as mt5  # type: ignore
except Exception as exc:  # pragma: no cover
    raise SystemExit("MetaTrader5 package not installed.") from exc

from app.streaming.live_store import live_store


def parse_args():
    parser = argparse.ArgumentParser(description="Import MT5 history into live_store.")
    parser.add_argument("symbol", help="Symbol, e.g., XAUUSD")
    parser.add_argument("timeframe", help="MT5 timeframe, e.g., 1m, 5m, 1h", default="1m")
    parser.add_argument("bars", type=int, default=1000, nargs="?", help="Number of bars to fetch")
    return parser.parse_args()


def resolve_timeframe(name: str):
    mapping = {
        "1m": mt5.TIMEFRAME_M1,
        "5m": mt5.TIMEFRAME_M5,
        "15m": mt5.TIMEFRAME_M15,
        "30m": mt5.TIMEFRAME_M30,
        "60m": mt5.TIMEFRAME_H1,
        "1h": mt5.TIMEFRAME_H1,
        "4h": mt5.TIMEFRAME_H4,
        "1d": mt5.TIMEFRAME_D1,
    }
    return mapping.get(name.lower(), mt5.TIMEFRAME_M1)


def main():
    args = parse_args()
    if not mt5.initialize():
        raise SystemExit(f"Failed to initialize MetaTrader5: {mt5.last_error()}")

    timeframe = resolve_timeframe(args.timeframe)
    rates = mt5.copy_rates_from_pos(args.symbol, timeframe, 0, args.bars)
    if not rates:
        raise SystemExit("No rates returned. Check symbol/timeframe.")

    for row in rates:
        live_store.ingest_bar(
            symbol=args.symbol,
            timeframe=args.timeframe,
            bar={
                "time": int(row['time']),
                "open": float(row['open']),
                "high": float(row['high']),
                "low": float(row['low']),
                "close": float(row['close']),
                "volume": float(row.get('tick_volume', 0.0)),
            },
        )

    print(f"Imported {len(rates)} bars for {args.symbol} {args.timeframe}")


if __name__ == "__main__":
    main()