#!/usr/bin/env stap
# block breaker
# Copyright (C) 2008 Masami Hiramatsu <masami.hiramatsu@gmail.com>
#
# This file is free software and is distributed under the terms of the GNU
# General Public License (GPL); either version 2, or (at your option) any
# later version.

#TODO
# - count scores
# - reflection control
# - special items
# - more stages

global b, bx, by, bar, dx, dy, dbar, sbar

probe begin {
  for (i = 1; i < 6; i++)
    for (j = 0; j < 10; j++)
      b[j,i] = 6 - i
  bx = 20; by = 19;
  dx = 1; dy = -1; dbar = 0
  bar = 18

  cursor_cls()
  for (i = 1; i < 6; i++)
    printf("|[%02d][%02d][%02d][%02d][%02d][%02d][%02d][%02d][%02d][%02d]|\n", 
           b[0,i], b[1,i], b[2,i], b[3,i], b[4,i], b[5,i], 
           b[6,i], b[7,i], b[8,i], b[9,i])
  for (i = 5; i < 20; i++)
    printf("|%40s|\n", " ");
  cursor_move(bx+2, by); print("o")
  cursor_move(bar+2, 20); print("=====")
}

probe game.kbd {
  if (down) {
    if (code == GM_KBD_RIGHT)
      dbar = 1
    else if (code == GM_KBD_LEFT)
      dbar = -1
  } else
    sbar = 1
}

probe timer.ms(100) {
   if (dbar*dbar < 9)
     dbar *= 2
}

function update_block(x,y) {
    b[x,y] --;
    if (b[x,y] == 0) {
      delete b[x,y]
      cursor_move(x*4+2,y); print("    ")
    } else {
      cursor_move(x*4+2,y); printf("[%02d]", b[x,y])
    }
} 

function hit_block() {
  x = bx/4; y = by
  if (b[x,y]) {
    update_block(x,y)
    dy = -dy
    dx = -dx
    bx += dx; by += dy 
    return 0;
  }
  x = bx/4; y = by+dy
  if (y <= 0 || b[x,y]) {
    if (b[x,y])
      update_block(x,y)
    dy = -dy
  }
  y = by; x = (bx+dx)/4
  if (bx+dx < 0 || x >= 10 || b[x,y]) {
    if (b[x,y])
      update_block(x,y)
    dx = -dx
  }
}

function no_blocks() {
  foreach ([x,y] in b)
    return 0
  return 1
}

probe timer.ms(200) {
  cursor_move(bx+2, by); print(" ")
  cursor_move(bar+2, 20); print("     ")

  bar+= dbar;
  if (sbar) { dbar = 0; sbar = 0 }
  if (bar <= 0) { bar = 0; dbar = 0}
  if (bar >= 35) { bar = 35; dbar = 0}

  bx += dx; by += dy
  hit_block()
  if (by == 19 && (bx >= bar && bx < bar + 5) ) {
    dy = -dy;
  }
  if (by >= 21)
    exit()

  if (no_blocks()) {
    cursor_move(15,19)
    println("Stage clear!")
    exit()
  }
  cursor_move(bx+2, by); print("o")
  cursor_move(bar+2, 20); print("=====")
  cursor_move(43,20)
}

probe end {
  cursor_move(16, 10);
  println("-GAME-OVER-")
  cursor_move(1, 20);
}