%{
#include <stdio.h>
#include <string.h>

extern int yylineno;
extern int yylex();
extern int yyparse();

void yyerror(const char *str)
{
	fprintf(stderr, "Error: %s, line %d\n", str, yylineno);
}

int yywrap()
{
        return 1;
} 
  
int main()
{
        yyparse();
        return 0;
} 

%}

%locations

%token COMMENT PL_PID_CONF PL_SET_TEMP PL_WAIT_FOR_TEMP PL_WAIT_FOR_TIME PL_SET_RAMP PL_LOUDSPEAKER_SET PL_OFF PL_CLEAR_FLAGS PL_DIGIO_CONF PL_DIGIO_SET PL_DIGIO_WAIT NEWLINE LITERAL
%token <float_value> NUMBER
%token <int_value> INT_NUMBER

%type <float_value> any_num

%union
{
    int int_value;
    float float_value;
}

%%

program: /* empty */
	| program command
	| program NEWLINE
	| program cmt_line
	;

command:
	command_core NEWLINE
	|
	command_core cmt_line
	;
	
command_core:
	pid_conf | temp_set | wait_time | wait_temp | temp_ramp | beep | temp_off | clear_flags | digio_conf | digio_set | digio_wait;
	
pid_conf: PL_PID_CONF any_num any_num any_num any_num any_num any_num
	{
		printf("PID Config\n");
	} 
	;

temp_set: PL_SET_TEMP any_num
	{
		printf("Target temp set: %f\n", $2);
	}
	;
	
wait_time: PL_WAIT_FOR_TIME any_num
	{
		printf("Wait for %f seconds\n", $2);
	}
	;

wait_temp: PL_WAIT_FOR_TEMP any_num
	{
		printf("Wait for temperature %f\n", $2);
	}
	;
	
temp_ramp: PL_SET_RAMP any_num any_num
	{
		printf("Temperature ramp. Target %f, duration: %f\n", $2, $3);
	}
	;
	
cmt_line: COMMENT NEWLINE
	{
		printf("Comment line detected\n");
	};
	
beep: PL_LOUDSPEAKER_SET INT_NUMBER
	{
		printf("Beep: %d\n", $2);
	}
	|
	PL_LOUDSPEAKER_SET NUMBER
	{
		printf("Warning: Float value casted to int!\n");
		printf("Beep %u\n", (unsigned int)$2);
	};

temp_off: PL_OFF
	{
		printf("Turn off oven\n");
	}
	;
	
clear_flags: PL_CLEAR_FLAGS
	{
		printf("Clear flags\n");
	}
	;

digio_conf: PL_DIGIO_CONF INT_NUMBER INT_NUMBER
	{
		printf("Configure digio pin\n");
	};
	
digio_set: PL_DIGIO_SET INT_NUMBER INT_NUMBER
	{
		printf("Configure digio pin\n");
	};
	
digio_wait: PL_DIGIO_WAIT INT_NUMBER INT_NUMBER
	{
		printf("Configure digio pin\n");
	};

/* Matches any number format that can be interpreted as float */	
any_num : NUMBER | INT_NUMBER
	{
		$$ = (float)$1;
	};
%%