#pragma once

// Rough "time left on battery" estimator. Watches the AXP fuel-gauge percentage
// while discharging and projects minutes-to-empty from the average drain rate
// since discharge began. Coarse by design — the gauge moves in slow 1% steps —
// so the UI shows it as "~Xh Ym left", emphasis on the ~.
//
// Feed it the latest percent + charging flag whenever a fresh battery reading
// lands (the daemon-independent battery poll in main.cpp).
void battery_est_update(int percent, bool charging);

// Estimated minutes remaining, or:
//   -2  charging / on USB (no estimate to give)
//   -1  not enough discharge history yet ("estimating…")
int battery_est_minutes(void);