#include <locale.h>
#include <ncurses.h>
#include <stdio.h>
#include <stdlib.h>

#include "jsf.h"

static const char noise[] = "..,`':;~+=< _ij\"^\\l(amxvu04PYW";

inline static char
rndchar(void)
{
	size_t index = 0;
	size_t len   = sizeof(noise) / sizeof(char);
	while (1) {
		size_t x = jsf_below(8);
		index += x;
		if (x < 5) break;
	}
	if (index >= len) index = 0;
	return noise[index];
}

int
main(void)
{
	jsf_init(arc4random());

	setlocale(LC_ALL, "");
	initscr();
	cbreak();
	curs_set(FALSE);
	leaveok(stdscr, TRUE);
	noecho();

	int percent = LINES * COLS / 5;
	for (int i = 0; i < percent; ++i) {
		int yy = (int) jsf_below((unsigned) LINES);
		int xx = (int) jsf_below((unsigned) COLS);
		mvaddch(yy, xx, rndchar());
	}

	getch();
	endwin();
}