/* status.c       status lines, game clock */

/*
 * xcheckers:     a point and click checkerboard
 * (C):           1999, 2000 Peter Chiocchetti <girbal@tacheles.de>
 */


#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <time.h>
#include <X11/Xlib.h>
#include "xcheckers.h"
#include "board.h"
#include "status.h"


#define sgutter (XTextWidth (font, "n", 1))
#define sline(i) ((font->ascent + font->descent) * (i + 1))

#define STATUSMASK (ExposureMask)


Pixmap          spix;		/* holds a picture of the satusline   */
GC              bgc;		/* foreground and background reversed */


/* draw the status lines */
static void
drawStatus(void)
{
  int             tmp;

  XFillRectangle(dpy, spix, bgc, 0, 0, board_width, status_height);
  XDrawLine(dpy, spix, gc, 0, 0, board_width, 0);
  /* player names */
  XDrawString(dpy, spix, gc, sgutter, sline(0),
	      &statusline[0][0], strlen(&statusline[0][0]));
  XDrawString(dpy, spix, gc, sgutter, sline(1),
	      &statusline[1][0], strlen(&statusline[1][0]));
  /* player clocks */
  tmp = board_width - XTextWidth(font, &clockline[0][0],
				 strlen(&clockline[0][0])) - sgutter;
  XDrawString(dpy, spix, gc, tmp, sline(0),
	      &clockline[0][0], strlen(&clockline[0][0]));
  tmp = board_width - XTextWidth(font, &clockline[1][0],
				 strlen(&clockline[1][0])) - sgutter;
  XDrawString(dpy, spix, gc, tmp, sline(1),
	      &clockline[1][0], strlen(&clockline[1][0]));
}


/* prepare the status window */
void
initStatus(unsigned long paper, unsigned long pen, char *myname)
{
  swin = XCreateSimpleWindow(dpy, win, 0, board_height,
			     board_width, status_height, 0, pen, paper);
  spix = XCreatePixmap(dpy, swin, board_width, status_height,
		       DefaultDepth(dpy, screen));
  bgc = XCreateGC(dpy, swin, 0, NULL);
  XSetForeground(dpy, bgc, paper);
  XSetBackground(dpy, bgc, pen);
  XSelectInput(dpy, swin, STATUSMASK);

  /* set clock to be invisible first */
  currClock = 0;
  currTime = time(NULL);
  clockline[0][0] = '\0';
  clockline[1][0] = '\0';

  snprintf(&statusline[0][0], 30, "Welcome %s!", myname);
  drawStatus();
  XMapWindow(dpy, swin);
}


/* handle exposures */
void
paintStatus(XExposeEvent * e)
{
  XCopyArea(dpy, spix, swin, gc, e->x, e->y, e->width, e->height,
	    e->x, e->y);
}


/* display status in window after engine move */
void
showStatus(void)
{
  drawStatus();
  XCopyArea(dpy, spix, swin, gc, 0, 0, board_width, status_height, 0, 0);
  XFlush(dpy);
}


/* resize status window to fit board */
void
resizeStatus(void)
{
  XMoveWindow(dpy,swin,0,board_height);
  XResizeWindow(dpy, swin, board_width, status_height);
  XFreePixmap(dpy, spix);
  spix = XCreatePixmap(dpy, swin, board_width, status_height,
		       DefaultDepth(dpy, screen));
  drawStatus();
}


/* redraw the clock, i.e. the status line */
void
freshenClock(void)
{
  /* could be smarter */
  showStatus();
}


/* update game clock display */
void
checkClock(void)
{
  time_t          dummy;

  if ((clockline[currPlayer][0] != '\0')
      && (currTime != (dummy = time(NULL)))) {
    currClock -= dummy - currTime;
    currTime = dummy;

    // stop at +/- 9:59
    if (currClock / 60 >= 10)
      return;
    if (currClock / 60 <= -10)
      return;

    if (currClock < 0)
      sprintf(&clockline[currPlayer][0], "-%d : %02d",
	      abs((int) (currClock / 60)), abs((int) (currClock % 60)));
    else
      sprintf(&clockline[currPlayer][0], " %d : %02d",
	      abs((int) (currClock / 60)), abs((int) (currClock % 60)));

    freshenClock();
  }
}