#include "cmd_spi.h"

/*
SPI command shows some info about SPI protocol
HELP   - shows all params
MISO,MOSI,SCK,HOLD,CS shows meaning of them
MODES  - shows SPI modes avaliable
SPI    - show diagram of spi
MASTER - show master connection
SLAVE  - show slave connection
*/

//TODO multiline output =[
char _spi_str_spi[]="""\
--------\n\
| MISO |\n\
| MOSI |\n\
| SCK  |\n\
| CS   |\n\
--------\
""";

char _spi_str_slave[]="""\
slave\n\
--------\n\
| MISO |>-\n\
| MOSI |<-\n\
| SCK  |<-\n\
| CS   |<-\n\
--------\
""";

char _spi_str_master[]="""\
master\n\
--------\n\
| MISO |<-\n\
| MOSI |>-\n\
| SCK  |>-\n\
| CS   |>-\n\
--------\
""";

char *_spi_help_table[] = 
{
	"HELP"  ,"MODES,SPI,SLAVE,MASTER,MISO,MOSI,SCK,HOLD,CS",
	"MODES" ,"QUAD(4-wires),DOUBLE(3-wires),SINGLE(2-wires)",
	"SPI"   ,_spi_str_spi,
	"SLAVE" ,_spi_str_slave,
	"MASTER",_spi_str_master,
	"MISO"  ,"(M)aster(I)nput(S)lave(O)utput",
	"MOSI"  ,"(M)aster(O)utput(S)lave(I)nput",
	"SCK"   ,"Serial Clockrate",
	"HOLD"  ,"HOLD operation for some time",
	"CS"    ,"(C)hip(S)elect",
	NULL,NULL
};

char *__cmd_spi_iter(char **table, char *cmp)
{
	int iter = 0;
	char *ret = NULL;

	//yea thats hack mate
	iter = 0;
	while (table[iter]!=NULL)
	{
		printf("%s\n",table[iter]);
		if (strncmp(table[iter],cmp,strlen(table[iter]))==0)
		{
			ret = table[iter+1];
		}
		iter += 2;
	}
	return ret;
}

void *cmd_spi(void *data)
{
	char *ret = NULL;
	char *match = NULL;

	int count=-1;
	sds params;
	sds *tokens=NULL;

	printf("SPI\n");

	if (data == NULL)
	{
		ret = alloc_new_str("SPI protocol info!");
	} else
	{
		params = sdsnew(data);
		tokens = sdssplitargs(params, &count);

		//maybe useless thing but who knows
		if (count < 1)
		{
			ret = alloc_new_str("None args");
		}

		match = __cmd_spi_iter(_spi_help_table, tokens[0]);
		if (match)
		{
			ret = alloc_new_str(match);
		} else
		{
			ret = alloc_new_str("None such commund");
		}

		sdsfree(params);
		sdsfreesplitres(tokens, count);
		
	}

	return ret;
}