#include <stdlib.h>

#define SHUTDOWN_THRESHOLD 2048

/**
 * Contains the system idle loop. Checks for button presses, handles
 * standby/resume, reads data from the Modem and updates the Display.
 */
class System {
	private:
		uint16_t want_shutdown;
		void shutdown(void);
		void receive(void);

		enum RxExpect : uint8_t {
			START1,
			START2,
			START_OR_PATTERN,
			PATTERN1,
			PATTERN2,
			HEADER1,
			HEADER2,
			META1,
			META2,
			DATA_FIRSTBLOCK,
			DATA,
		};

		RxExpect rxExpect;

	public:
		System() { want_shutdown = 0; rxExpect = START1; };

		/**
		 * Initial MCU setup. Turns off unused peripherals to save power
		 * and configures the button pins. Also configures all other pins
		 * and peripherals using the enable function of their respective
		 * classes. Turns on interrupts once that's done.
		 */
		void initialize(void);

		/**
		 * System idle loop. Checks for button presses, handles
		 * standby/resume, reads data from the Modem and updates the Display.
		 *
		 * It is recommended to run this function before going back to sleep
		 * whenever the system is woken up by an interrupt.
		 */
		void loop(void);
};

extern System rocket;