/*
 * UNG's Not GNU
 *
 * Copyright (c) 2022, Jakob Kaivo <jkk@ung.org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/* TODO: Track down XPG/3 or 4 to get a more accurate description of requirements */

#define _POSIX_C_SOURCE 2
#include <ctype.h>
#include <limits.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define CHARACTER_WIDTH		9
#define CHARACTER_HEIGHT	8

static char letters[UCHAR_MAX][CHARACTER_HEIGHT][CHARACTER_WIDTH] = {
	['a'] =	{ "        ",
		  "        ",
		  "  aaa   ",
		  "     a  ",
		  "  aaaa  ",
		  " a   a  ",
		  "  aaa a ",
		  "        ", },

	['b'] =	{ "        ",
		  " b      ",
		  " b      ",
		  " b      ",
		  " bbbbb  ",
		  " b    b ",
		  " bbbbb  ",
		  "        " },

};

static void banner(char *s, size_t columns)
{
	size_t slen = strlen(s);
	for (size_t i = 0; i < slen; i++) {
		if (!isprint(s[i]) || s[i] < 0 || i > UCHAR_MAX) {
			s[i] = '?';
		}
	}

	for (size_t row = 0; row < CHARACTER_HEIGHT; row++) {
		for (size_t i = 0; i < columns / CHARACTER_WIDTH && i < slen; i++) {
			fputs(letters[(size_t)s[i]][row], stdout);
		}
		putchar('\n');
	}
}

int main(int argc, char *argv[])
{
	setlocale(LC_ALL, "");

	int c;
	while ((c = getopt(argc, argv, "")) != -1) {
		switch(c) {
		default:
			return 1;
		}
	}

	if (optind >= argc) {
		fprintf(stderr, "banner: missing operands\n");
		return 1;
	}

	size_t columns = 80;
	char *colenv = getenv("COLUMNS");
	if (colenv) {
		columns = atoi(colenv);
	}

	while (optind < argc) {
		banner(argv[optind++], columns);
	}
	return 0;
}