/*
 * main.c
 *
 * Created: 08-Feb-21 10:03:33 AM
 *  Author: lemms
 */ 
# define F_CPU 10000000UL

#include <util/delay.h>
#include <xc.h>

typedef enum {
	IDLE,
	PERPARE_COFFEE_POWDER,
	BOIL_WATER,
	POUR_COFFEE
	} state ;
	
	typedef enum {
		false = 0,
		true = 1
	} bool;

state current_state;

void wait( int ms )
{
	for (int i=0; i<ms; i++)
	{
		_delay_ms( 1 );		// library function (max 30 ms at 8MHz)
	}
}

void setPulveriserState(bool state){
	// set coffee powder mill on or off;
}

bool checkCoffeePowderLevel(){
	// check sensor
	return true;
}

void updateScreen(){
	// update its display;
	if(...){
		current_state = PERPARE_COFFEE_POWDER;
	}
}

void setBoilerState(bool state){
	// set boiler on or off;
}

bool checkWaterTemp(){
	// check sensor
	return true;
}

 long milisPouring;
 
void setPourPumpState(bool state){
	// set pump on or off;
}

int main(void)
{
    while(1)
    {
        switch(state){
			case IDLE:
				updateScreen();
			break;
			
			case PERPARE_COFFEE_POWDER:
				bool coffeeLevel = checkCoffeePowderLevel();
				setPulveriserState(!coffeeLevel);
			
				if(coffeeLevel){
					current_state = BOIL_WATER;
				}
			break;
			
			case BOIL_WATER:
				bool waterTemp = checkWaterTemp();
				setBoilerState(!waterTemp);
				if(waterTemp){
					current_state = POUR_COFFEE;
				}
			break;
			
			case POUR_COFFEE:
				bool shouldPour = !(milisPouring => 2000);
				setPourPumpState(shouldPour);
			
				milisPouring++;
			
				if(!shouldPour){
					milisPouring = 0;
				}
			break;
		}
		wait(1);
    }
}