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

#include "image.h"
#include "lbx.h"

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

enum {
	MODE_NONE,
	MODE_DECODE,
	MODE_IDENT,
};

int main(int argc, char **argv)
{
	int mode = MODE_NONE, verbose = 0;
	FILE *inf = stdin, *palf = NULL;
	const char *name = "stdin";
	LBX_IMG *img;
	int opt;

	static const char *sopts = "idvf:p:";
	static const struct option lopts[] = {
		{ "info",    0, NULL, 'i' },
		{ "decode",  0, NULL, 'd' },
		{ "verbose", 0, NULL, 'v' },
		{ "file",    1, NULL, 'f' },
		{ "palette", 1, NULL, 'p' },

		{ 0 }
	};

	progname = "lbximg"; /* argv[0]; */
	while ((opt = getopt_long(argc, argv, sopts, lopts, NULL)) != -1) {
		switch(opt) {
		case 'i':
			mode = MODE_IDENT;
			break;
		case 'd':
			mode = MODE_DECODE;
			break;
		case 'v':
			verbose = 1;
			break;
		case 'f':
			if (strcmp(optarg, "-") == 0)
				break;

			name = strrchr(optarg, '/');
			name = name ? name+1 : optarg;

			inf = fopen(optarg, "rb");
			if (!inf) {
				errmsg("failed to open %s: %m\n", optarg);
				return EXIT_FAILURE;
			}
			break;
		case 'p':
			palf = fopen(optarg, "rb");
			if (!palf) {
				errmsg("failed to open %s: %m\n", optarg);
				return EXIT_FAILURE;
			}

			break;
		default:
			return EXIT_FAILURE;
		}
	}

	if (mode == MODE_NONE) {
		errmsg("you must specify a mode.\n", 0);
		return EXIT_FAILURE;
	}

	img = lbximg_fopen(inf);
	if (!img) {
		errmsg("failed to open image: %s.\n", lbx_strerror());
		return EXIT_FAILURE;
	}

	if (verbose || mode == MODE_IDENT) {
		struct lbx_imginfo info;
		lbximg_getinfo(img, &info);

		printf("%s is %ux%u LBX image, %u frames\n",
		       name, info.width, info.height, info.nframes);
	}

	switch (mode) {
	case MODE_DECODE:
		errmsg("decode function not yet implemented.\n", 0);
		break;
	}

	lbximg_close(img);
	return EXIT_SUCCESS;
}