#include <ownetapi.h>

#include "parser.h"
#include "debug.h"
#include "string.h"

int onewire_parser(char *rrd_data, const char **parser_data)
{
	OWNET_HANDLE h;
	const char *server_addr;
	char buf[24], *tmp;
	int i = 1, ret;
	int max_str = RRD_DATA_MAX_LEN;

	if (!parser_data) {
		pr_err("No parser data available\n");
		return -1;
	}

	server_addr = parser_data[0];

	if (!server_addr) {
		pr_err("Server address not specified\n");
		return -1;
	}

	h = OWNET_init(server_addr);
	if (h < 0) {
		pr_err("Failed to connect to server %s\n", server_addr);
		return -1;
	}

	while (parser_data[i]) {
		if (!strcmp("U", parser_data[i])) {
undefined:
			ret = snprintf(rrd_data, max_str, "U");
			max_str -= ret;
			rrd_data += ret;
			goto next;
		}

		pr_info("Reading data for entry %s\n", parser_data[i]);
		ret = OWNET_read(h, parser_data[i], &tmp);
		if (ret < 0) {
			pr_err("Failed to read entry %s\n", parser_data[i]);
			goto undefined;
		}

		/* The data from OWNET_read appears to not be NULL terminated */
		memcpy(buf, tmp, MIN(ret, sizeof(buf) -1));
		free(tmp);
		buf[ret] = 0;

		ret = snprintf(rrd_data, max_str, "%s", buf);
		max_str -= ret;
		rrd_data += ret;

next:
		i++;
		if (!parser_data[i])
			break;

		ret = snprintf(rrd_data, max_str, ":");
		max_str -= ret;
		rrd_data += ret;
	}
	rrd_data = 0;

	OWNET_finish();
	return 0;
}