Flipdot-display/src/esp32/logic/display_controller.h

#pragma once

#include <stdint.h>

#include "logic/power_timer.h"

// Power for the panels and the Nano (implemented by NanoLink)
class DisplayPower
{
public:
	virtual bool isOn() = 0;
	// Switch on and wait until the Nano is ready
	virtual void on() = 0;
	virtual void off() = 0;
};

// The screens the display can show (implemented by FlipdotFrames)
class Frames
{
public:
	virtual void clock(int hour, int minute) = 0;
	// Shown instead of the clock while WiFi is down (the time keeps running without it)
	virtual void noWifi(int hour, int minute) = 0;
	virtual void logo() = 0;
	virtual void blank() = 0;
};

// Decides what the display shows and when it is powered, based on the time and the two
// Home Assistant switches. A frame is only sent when it changes. Pure logic, tested in
// test/test_esp32.
class DisplayController
{
public:
	DisplayController(DisplayPower &power, Frames &frames);

	// Home Assistant "FlipDot Display Clock" switch: off shows the logo instead of the clock
	void setClockEnabled(bool enabled);
	// Home Assistant "FlipDot Display Power" switch: off clears the display and powers it off
	void setPowerEnabled(bool enabled);

	bool clockEnabled() const;
	bool powerEnabled() const;

	// Call often (every loop). time_valid is false until the time is synced over NTP.
	// While WiFi is down for NO_WIFI_SHOW_TIME, "No WiFi" is shown instead of the clock.
	void update(uint32_t now, bool time_valid, int hour, int minute, bool wifi_connected);

private:
	enum class Screen
	{
		Unknown, // nothing sent since the last power on
		Clock,
		NoWifi,
		Logo,
		Blank,
	};

	DisplayPower &_power;
	Frames &_frames;
	PowerTimer _off_timer;

	bool _clock_enabled = true;
	bool _power_enabled = true;

	Screen _screen = Screen::Unknown;
	int _shown_hour = -1;
	int _shown_minute = -1;

	bool _wifi_lost = false;
	uint32_t _wifi_lost_since = 0;

	void _showClock(int hour, int minute, bool no_wifi);
	void _showLogo();
	void _showBlank();
};