#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>

#include "lbx.h"

static const char *progname;
#define errmsg(fmt, ...) (\
	fprintf(stderr, "%s: " fmt, progname, __VA_ARGS__)\
)

enum {
	MODE_NONE,
	MODE_LIST,
	MODE_EXTRACT,
};

int list(FILE *f, int verbose) {
	LBX *lbx = lbx_fopen(f);
	if (!lbx) {
		errmsg("failed to open archive: %s.\n", lbx_strerror());
		return EXIT_FAILURE;
	}

	if (verbose) {
		printf("Files in archive: %zd\n", lbx_numfiles(lbx));
	}

	lbx_close(lbx);
}

int main(int argc, char **argv)
{
	int mode = MODE_NONE, verbose = 0;
	FILE *f  = stdin;
	int opt;

	static const char         *sopts   = "lxf:v";
	static const struct option lopts[] = {
		{ "list",    0, NULL, 'l' },
		{ "extract", 0, NULL, 'x' },

		{ "file",    1, NULL, 'f' },

		{ "verbose", 0, NULL, 'v' },

		{ 0 }
	};

	progname = "lbxtool"; /* argv[0]; */
	while ((opt = getopt_long(argc, argv, sopts, lopts, NULL)) != -1) {
		switch(opt) {
		case 'l':
			mode = MODE_LIST;
			break;
		case 'x':
			mode = MODE_EXTRACT;
			break;
		case 'f':
			f = fopen(optarg, "rb");
			if (!f) {
				errmsg("failed to open file %s: %m\n", optarg);
				return EXIT_FAILURE;
			}
			break;
		case 'v':
			verbose = 1;
			break;
		default:
			return EXIT_FAILURE;
		}
	}

	switch (mode) {
	case MODE_LIST:
		return list(f, verbose);
	case MODE_EXTRACT:
		return EXIT_SUCCESS;
	}

	fprintf(stderr, "%s: you must specify a mode.\n", progname);
	return EXIT_FAILURE;
}