#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <X11/Xft/Xft.h>
#include <X11/Xlib.h>

#include "pipe.h"

Display* display;
Window win;
GC gc;

static int height = 17;
static int width = 1000;
static float width_ratio = 1;

static int err_code = 1;

void die(const char* fmt, ...) {
  va_list args;
  va_start(args, fmt);
  vfprintf(stderr, fmt, args);
  va_end(args);

  putc('\n', stderr);

  exit(err_code);
}

void draw_bar(void) {
}

void init(void) {
  display = XOpenDisplay(NULL);
  if (display == NULL) {
    die("could not open X display");
  }

  XSetWindowAttributes win_attr = {
    .override_redirect = 1,
    .background_pixel = 0x202020,
    .event_mask = ExposureMask | PropertyChangeMask,
  };

  Screen* screen = DefaultScreenOfDisplay(display);
  width = WidthOfScreen(screen);

  win = XCreateWindow(
    display,
    DefaultRootWindow(display),
    0, 0,
    width, height,
    0,
    CopyFromParent,
    InputOutput,
    CopyFromParent,
    CWOverrideRedirect | CWBackPixel | CWEventMask,
    &win_attr
  );

  XMapRaised(display, win);

  gc = XCreateGC(display, win, 0, NULL);
  XSetForeground(display, gc, 0xFFFFFF);

  XFlush(display);
}

void deinit(void) {
  XUnmapWindow(display, win);
  XDestroyWindow(display, win);
}

int main(void) {
  init_pipe();
  init();

  while (true) {
    XEvent ev;
    XNextEvent(display, &ev);

    XDrawLine(display, win, gc, 0, 0, width, height);

    XFlush(display);
    await_change();
  }

  deinit();
  return 0;
}