/*
 * 	libglacier.c - Backend C library for Glacier
 *
 * 	This file is part of Glacier.
 *
 * 	Glacier is free software: you can redistribute it and/or modify it under the terms of the
 * 	GNU General Public License as published by the Free Software Foundation, either
 * 	version 3 of the License, or (at your option) any later version.
 *
 * 	Glacier is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * 	without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * 	PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * 	You should have received a copy of the GNU General Public License along with Glacier. If
 * 	not, see <https://www.gnu.org/licenses/>.
 */

#include <color.h>
#include <fcntl.h>
#include <libconfig.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

/* Global variables */

config_t cfg;
config_setting_t *setting;
const char str;
int GLACIER_ALLOW_SERVICES;
char GLACIER_ALLOWED_LICENSES;

const char *runtime_files[] = { "/etc/glacier.cfg", "/etc/glacier/call-hooks", "/etc/make.conf" };

/*
 * infolog
 *
 * DESCRIPTION: Output a stylized info message.
 * PARAMETERS: char MSG[]
 *
 */

void
infolog(char MSG[])
{
	if (MSG == NULL) {
		return;
	}

	printf(COL_BLUE "[i]" COL_RESET " %s\n", MSG);
	return;
}

/*
 * warnlog
 *
 * DESCRIPTION: Output a stylized warning message.
 * Parameters: char MSG[]
 *
 */

void
warnlog(char MSG[])
{
	if (MSG == NULL) {
		return;
	}

	printf(COL_YELLOW "[!]" COL_RESET " %s\n", MSG);
	return;
}

/*
 * errlog
 * 
 * DESCRIPTION: Output a stylized error message.
 * PARAMETERS: char MSG[]
 *
 */

void
errlog(char MSG[])
{
	if (MSG == NULL) {
		return;
	}

	fprintf(stderr, COL_RED "[x]" COL_RESET " %s\n", MSG);
	return;
}

/*
 * runtime_exists
 *
 * DESCRIPTION: Check if necesary runtime files exist.
 * PARAMETERS: None.
 *
 */

void
runtime_exists()
{
	int f;

	for (f = 0; f < 3; f++) {
		if (access(runtime_files[f], F_OK) == 0) {
			printf("%s exists\n", runtime_files[f]);
		} else {
			printf("%s does not exist\n", runtime_files[f]);
		}
	}
	return;
}

/*
 * init_config
 *
 * DESCRIPTION: Initialize libconfig.
 * PARAMETERS: None.
 *
 */

int
init_config()
{
	config_init(&cfg);

	if (! config_read_file(&cfg, "glacier.cfg")) {
		fprintf(stderr, "%s:%d - %s\n", config_error_file(&cfg),
			config_error_line(&cfg), config_error_text(&cfg));
		config_destroy(&cfg);
		return(EXIT_FAILURE);
	}

	infolog("Initialized libconfig");
}

int
die_config()
{
	config_destroy(&cfg);
	infolog("Destroyed libconfig");
	return(EXIT_SUCCESS);
}

void
load_setting_from_config()
{
	if(config_lookup_bool(&cfg, "GLACIER_ALLOW_SERVICES", &GLACIER_ALLOW_SERVICES))
		printf("Services allowed: %s\n", GLACIER_ALLOW_SERVICES ? "true" : "false");
	else
		warnlog("GLACIER_SERVICES_ALLOWED is not defined in glacier.cfg.");

}

int
copy_file(char pkg[], char workpkg[])
{
	char cwd[PATH_MAX];
	FILE *localpkg, *newpkg;

	localpkg = fopen(pkg, "r");
	newpkg = fopen(workpkg, "a+");

	contents = fgetc(localpkg);
	while (contents != EOF) {
		fputc(contents, newpkg);
		contents = fgetc(localpkg);
	}
}

int
main(int argc, char *argv[])
{
	errlog("Unknown option.");
	printf(COL_RED "[x]" COL_RESET " usage: %s [-h] [-v] [-f] [-u] [-x] [-fl] [-ul] [-d] [-s] PKG\n", argv[0]);
	runtime_exists();
	init_config();
	load_setting_from_config();
	die_config();
}