/*
 *
 * (c) 2004,2005 Laurent Vivier <Laurent@lvivier.info>
 *
 */

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>

#include "libemile.h"
#include "libconfig.h"
#include "emile_config.h"

enum {
	ARG_NONE = 0,
	ARG_HELP ='h',
	ARG_VERBOSE = 'v',
	ARG_FIRST = 'f',
	ARG_SECOND = 's',
	ARG_KERNEL = 'k',
	ARG_RAMDISK = 'r',
	ARG_GETINFO = 'g',
	ARG_CONFIG = 'c',
};

static struct option long_options[] =
{
	{"help",	0, NULL,	ARG_HELP	},
	{"verbose",	0, NULL,	ARG_VERBOSE	},
	{"first",	1, NULL,	ARG_FIRST	},
	{"second",	1, NULL,	ARG_SECOND	},
	{"kernel",	1, NULL,	ARG_KERNEL	},
	{"ramdisk",	1, NULL,	ARG_RAMDISK	},
	{"getinfo",	1, NULL,	ARG_GETINFO	},
	{"config",	1, NULL,	ARG_CONFIG	},
	{NULL,		0, NULL,	0		},
};

static void usage(int argc, char** argv)
{
	fprintf(stderr, "Usage: %s [OPTION] <image>\n", argv[0]);
	fprintf(stderr, "Create an EMILE bootable floppy disk\n");
	fprintf(stderr, "EMILE allows you to boot linux from a floppy disk\n");
	fprintf(stderr, "   -h, --help      display this text\n");
	fprintf(stderr, "   -v, --verbose   verbose mode\n");
	fprintf(stderr, "   -f, --first     first level to copy to floppy\n");
	fprintf(stderr, "   -s, --second    second level to copy to floppy\n");
	fprintf(stderr, "   -k, --kernel    kernel to copy to floppy\n");
	fprintf(stderr, "   -r, --ramdisk   ramdisk to copy to floppy\n");
	fprintf(stderr, "   -g, --getinfo   get information from <image>\n");
	fprintf(stderr, "   -c, --config    "
			"set configuration according to a config file\n");
	fprintf(stderr, "\nbuild: \n%s\n", SIGNATURE);
}

static int get_info(char *image, int verbose)
{
	int fd;
	int drive_num;
	int second_offset;
	int second_size;
	char * configuration;
	char property[1024];
	char title[1024];
	int index;
	char *known_properties[] = {
		"kernel",
		"parameters",
		"initrd",
		NULL
	};
	int i;
	int current;
	int res;
	int ret;

	fd = open(image, O_RDONLY);
	if (fd == -1)
	{
		fprintf(stderr, "ERROR: cannot open \"%s\"\n",
				image);
		return 2;
	}

	/* first level info */

	ret = emile_first_get_param(fd, &drive_num, &second_offset,
				    &second_size);

	if (ret != 0)
	{
		printf("EMILE is not installed in this bootblock\n");
		close(fd);
		return 0;
	}

	printf("EMILE boot block identified\n\n");
	printf("Drive number:        %d\n", drive_num);
	printf("Second level offset: %d\n", second_offset);
	printf("Second level size:   %d\n", second_size);

	/* second level info */

	printf("EMILE second level information\n");

	configuration = emile_second_get_configuration(fd);
	if (configuration == NULL)
	{
		fprintf(stderr, "ERROR: cannot read second level\n");
		return 3;
	}

	if (verbose)
	{
		printf("%s\n", configuration);
		return 0;
	}
	
	if (config_get_property(configuration, 
				"gestaltID", property) != -1)
		printf("User forces gestalt ID to %ld\n",
			strtol(property, NULL, 0));

	if (config_get_property(configuration, 
				"default", property) != -1)
		printf("default %ld\n", strtol(property, NULL, 0));

	if (config_get_property(configuration, 
				"timeout", property) != -1)
		printf("timeout %ld\n", strtol(property, NULL, 0));

	if (config_get_property(configuration, 
				"vga", property) != -1)
		printf("vga %s\n", property);

	current = 0;
	for (index = 0; index < 20; index++)
	{
		res = config_get_property(configuration + current,
					  "title", title);
		if (res == -1)
		{
			if (index)
				break;
		}
		else {
			printf("title %s\n", title);
			current += res;
			current = config_get_next_property(
						configuration,
						current,
						NULL, NULL);
		}
		for (i = 0; known_properties[i] != NULL; i++)
		{
			if (config_get_indexed_property(
					configuration,
					(res == -1) ? NULL : "title",
					title, 
					known_properties[i],
					property) != -1)
				printf( "    %s %s\n", 
					known_properties[i], 
					property);
		}
	}

	free(configuration);

	close(fd);
	return 0;
}

static int set_config(char *image, int verbose, char *config_path, 
		      char *first_level, char *second_level)
{
	char *ramdisk_ondisk, *kernel_ondisk;
	char* kernel_image = NULL;
	char* ramdisk = NULL;
	emile_config* config;
	char *configuration;
	int timeout;
	int gestaltid;
	int default_entry;
	char *title, *args;
	char buf[64];
	int fd;

	if (kernel_image || ramdisk)
	{
		fprintf(stderr, 
		      "ERROR: don't use --kernel or --ramdisk with --config\n");
		return 4;
	}
	config = emile_config_open(config_path);
	if (config == NULL)
	{
		fprintf(stderr, "ERROR: cannot open %s\n", config_path);
		return 5;
	}

	if ((first_level == NULL) && 
	    (emile_config_get(config, CONFIG_FIRST_LEVEL, &first_level)))
		first_level = PREFIX "/lib/emile/first_floppy";

	if ((second_level == NULL) &&
	    emile_config_get(config, CONFIG_SECOND_LEVEL, &second_level))
		second_level = PREFIX "/lib/emile/second_floppy";

	fd = emile_floppy_create(image, first_level, second_level);
	if (fd < 0)
	{
		fprintf(stderr, "ERROR: cannot create %s\n", image);
		return 6;
	}

	configuration = malloc(65536);
	if (configuration == NULL)
	{
		fprintf(stderr, "ERROR: cannot initalize configuration\n");
		return 7;
	}
	configuration[0] = 0;

	config_set_property(configuration, "vga", "default");

	if (!emile_config_get(config, CONFIG_GESTALTID, &gestaltid))
	{
		sprintf(buf, "%d", gestaltid);
		config_set_property(configuration, "gestaltID", buf);
	}

	if (!emile_config_get(config, CONFIG_DEFAULT, &default_entry))
	{
		sprintf(buf, "%d", default_entry);
		config_set_property(configuration, "default", buf);
	}

	if (!emile_config_get(config, CONFIG_TIMEOUT, &timeout))
	{
		sprintf(buf, "%d", timeout);
		config_set_property(configuration, "timeout", buf);
	}

	kernel_ondisk = NULL;
	ramdisk_ondisk = NULL;
	emile_config_read_first_entry(config);
	do {
		if (!emile_config_get(config, CONFIG_TITLE, &title))
			config_add_property(configuration, "title", title);
		if (verbose)
			printf("title %s\n", title);
		if (!emile_config_get(config, CONFIG_KERNEL, &kernel_image))
		{
			if (emile_is_url(kernel_image))
			{
				if (verbose)
					printf("    kernel %s\n", kernel_image);
				config_set_indexed_property(configuration, 
						    "title", title,
						    "kernel", kernel_image);
			}
			else
			{
				if (kernel_ondisk == NULL)
					kernel_ondisk = emile_floppy_add(fd, 
								kernel_image);
				config_set_indexed_property(configuration,
						    "title", title,
						    "kernel", kernel_ondisk);
				if (verbose)
					printf("    kernel %s (%s)\n", 
						kernel_image, kernel_ondisk);
			}
		}
		if (!emile_config_get(config, CONFIG_INITRD, &ramdisk))
		{
			if (emile_is_url(ramdisk))
			{
				if (verbose)
					printf("    initrd %s\n", ramdisk);
				config_set_indexed_property(configuration,
							    "title", title,
							    "initrd", ramdisk);
			}
			else
			{
				if (ramdisk_ondisk == NULL)
					ramdisk_ondisk = emile_floppy_add(fd, 
								      ramdisk);
				config_set_indexed_property(configuration,
						"title", title,
						"initrd", ramdisk_ondisk);
				if (verbose)
					printf("    initrd %s (%s)\n", 
						ramdisk, ramdisk_ondisk);
			}
		}
		if (!emile_config_get(config, CONFIG_ARGS, &args))
		{
			config_set_indexed_property(configuration, 
						    "title", title,
						    "parameters", args);
			if (verbose)
				printf("    parameters %s\n", args);
		}
	} while (!emile_config_read_next(config));
	emile_config_close(config);
	if (ramdisk_ondisk != NULL)
		free(ramdisk_ondisk);
	if (kernel_ondisk != NULL)
		free(kernel_ondisk);

	if (strlen(configuration) > 1023)
	{
		int tmpfd;
		char *conf;
		char *tmpfile = strdup("/tmp/emile-install-XXXXXX");

		fprintf(stderr, "WARNING: configuration doesn't fit in second level\n"
				"         will store it at end of floppy\n");

		tmpfd = mkstemp(tmpfile);
		write(tmpfd, configuration, strlen(configuration) + 1);
		close(tmpfd);

		conf = emile_floppy_add(fd, tmpfile);
		free(configuration);

		unlink(tmpfile);
		free(tmpfile);

		configuration = malloc(1024);
		configuration[0] = 0;

		config_set_property(configuration, "configuration", conf);
		if (verbose)
			printf("configuration %s\n", conf);
	}

	emile_second_set_configuration(fd, configuration);
	emile_floppy_close(fd);

	free(configuration);

	return 0;
}

int main(int argc, char** argv)
{
	int verbose = 0;
	int option_index = 0;
	char* first_level = NULL;
	char* second_level = NULL;
	char* kernel_image = NULL;
	char* ramdisk = NULL;
	char* image = NULL;
	char* config_path = NULL;
	int action_getinfo = 0;
	int c;
	int ret;

	while(1)
	{
		c = getopt_long(argc, argv, "hvf:s:k:r:gc:", long_options, 
				&option_index);
		if (c == -1)
			break;
		switch(c)
		{
		case ARG_HELP:
			usage(argc, argv);
			return 0;
		case ARG_VERBOSE:
			verbose = 1;
			break;
		case ARG_FIRST:
			first_level = optarg;
			break;
		case ARG_SECOND:
			second_level = optarg;
			break;
		case ARG_KERNEL:
			kernel_image = optarg;
			break;
		case ARG_RAMDISK:
			ramdisk = optarg;
			break;
		case ARG_GETINFO:
			action_getinfo = 1;
			break;
		case ARG_CONFIG:
			config_path = optarg;
			break;
		}
	}

	if (optind < argc)
		image = argv[optind];

	if (image == NULL)
	{
		fprintf(stderr, 
		"ERROR: you must provide an image file or a block device.\n");
		usage(argc, argv);
		return 1;
	}

	if (action_getinfo)
		return get_info(image, verbose);

	if (config_path != NULL)
		return set_config(image, verbose, config_path, 
				  first_level, second_level);

	if (first_level == NULL)
		first_level = PREFIX "/lib/emile/first_floppy";

	if (second_level == NULL)
		second_level = PREFIX "/lib/emile/second_floppy";

	if (kernel_image == NULL)
		kernel_image = PREFIX "/boot/vmlinuz";

	if (verbose)
	{
		printf("first:   %s\n", first_level);
		printf("second:  %s\n", second_level);
		printf("kernel:  %s\n", kernel_image);
		printf("ramdisk: %s\n", ramdisk);
		printf("image:   %s\n", image);
	}

	ret = emile_floppy_create_image(first_level, second_level, 
					kernel_image, ramdisk, image);
	switch(ret)
	{
	case 0:
		break;
	case EEMILE_CANNOT_WRITE_FIRST:
		fprintf(stderr, "ERROR: cannot write first\n");
		break;
	case EEMILE_CANNOT_WRITE_SECOND:
		fprintf(stderr, "ERROR: cannot write second\n");
		break;
	case EEMILE_CANNOT_WRITE_KERNEL:
		fprintf(stderr, "ERROR: cannot write kernel\n");
		break;
	case EEMILE_CANNOT_WRITE_RAMDISK:
		fprintf(stderr, "ERROR: cannot write ramdisk\n");
		break;
	case EEMILE_CANNOT_WRITE_PAD:
		fprintf(stderr, "ERROR: cannot write padding\n");
		break;
	case EEMILE_CANNOT_CREATE_IMAGE:
		fprintf(stderr, "ERROR: cannot create image\n");
		break;
	case EEMILE_CANNOT_OPEN_FILE:
		fprintf(stderr, "ERROR: cannot open one of provided files\n");
		break;
	default:
		fprintf(stderr, "ERROR: unknown error :-P\n");
		break;
	}

	return ret;
}