#!/usr/bin/env python3
"""Auto-top-up (sweep): send BTC to IPRoyal when reseller balance is low.

SAFETY: DRY-RUN by default — prints what it *would* do, never moves money.
To go live you must:
  1. set sweep.iproyal_btc_address in config.json (IPRoyal's BTC deposit address),
  2. wire the send() function to your source wallet (BTCPay hot wallet / Alby),
  3. pass --live, with a hard cap via --cap-sats.
"""
import argparse
import sys

import iproyal


def main():
    ap = argparse.ArgumentParser()
    ap.add_argument("--live", action="store_true", help="actually send (default: dry-run)")
    ap.add_argument("--cap-sats", type=int, default=0, help="hard cap on sats to send")
    args = ap.parse_args()

    cfg = iproyal.CFG.get("sweep", {})
    float_target = float(cfg.get("float_target", 50.0))
    max_sats = args.cap_sats or int(cfg.get("max_sats", 75000))
    dest = cfg.get("iproyal_btc_address", "")

    try:
        bal = iproyal.get_balance()
    except Exception as e:
        print(f"balance check failed: {e}")
        sys.exit(1)

    if bal >= float_target:
        print(f"balance ${bal} >= float target ${float_target} — no top-up needed")
        return

    shortfall = float_target - bal
    if not dest:
        print(f"LOW: balance ${bal} is below float target ${float_target} (shortfall ${shortfall:.2f}). "
              "Set sweep.iproyal_btc_address in config.json to enable auto-top-up.")
        return

    if args.live:
        print(f"LIVE: balance ${bal} < ${float_target} — would send {max_sats} sats (~${shortfall:.2f}) to {dest}")
        print("WARNING: send() not yet wired — this is a no-op placeholder.")
    else:
        print(f"DRY-RUN: balance ${bal} < float target ${float_target} (shortfall ${shortfall:.2f}) — "
              f"would top up {max_sats} sats to {dest}")


if __name__ == "__main__":
    main()