#pragma once
#include <Arduino.h>

// Controls the discrete RGB LED on the back of the CYD (no speaker
// present, therefore the LED replaces the acoustic alarm from the Cardputer
// project). Pins: Red=GPIO4, Green=GPIO16, Blue=GPIO17, active-low (LOW = on).
namespace LedAlert {

    enum class Mode {
        Off,
        ProximityGreen,
        WatchlistBlue,
        EmergencyRed,
    };

    void begin();
    bool update(Mode mode, uint32_t nowMs);

    void pulseHeartbeat(uint32_t nowMs);

// Blocking, short white flash (all 3 color channels on) as
    // immediate confirmation for a one-time user action (e.g. "Cam"
    // button hit). Deliberately blocking (delay), since only called from the
    // main loop on a tap, not from the NetTask loop.
    void flashWhite(uint32_t durationMs = 150);
}