#!/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", {})
    threshold = iproyal.CFG.get("alerts", {}).get("low_balance_threshold", 10.0)
    max_sats = args.cap_sats or int(cfg.get("max_sats", 100000))
    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 >= threshold:
        print(f"balance ${bal} >= threshold ${threshold} — no top-up needed")
        return

    if not dest:
        print("NO destination set (sweep.iproyal_btc_address). "
              "Set it in config.json before going live.")
        return

    if args.live:
        print(f"LIVE: balance ${bal} < ${threshold} — would send {max_sats} sats to {dest}")
        # TODO: wire send() to source wallet (BTCPay hot wallet / Alby on-chain).
        # Hard cap enforced here: never exceed max_sats.
        print("WARNING: send() not yet wired — this is a no-op placeholder.")
    else:
        print(f"DRY-RUN: balance ${bal} < ${threshold} — would top up {max_sats} sats to {dest}")


if __name__ == "__main__":
    main()