// -*- mode:C++; tab-width:2; c-basic-offset:2; indent-tabs-mode:nil -*-
/* Blackjack - slot.cpp
 * Copyright (C) 2003 William Jon McCann <mccann@jhu.edu>
 * Copyright (C) 1998 Jonathan Blandford <jrb@mit.edu>
 *
 * This game is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA
 */

#include <stdlib.h>

#include "blackjack.h"
#include "slot.h"
#include "card.h"
#include "chips.h"

GList *slot_list = NULL;

GdkPixbuf *slot_pixbuf;
GdkPixmap *default_background_pixmap; 

GdkPixmap*
get_background_pixmap () {
  
  return default_background_pixmap;
}

GdkPixbuf*
bj_slot_get_pixbuf ()
{
  return slot_pixbuf;
}

void
bj_slot_load_pixmaps (void)
{
  gchar *buffer;

  buffer = g_build_filename ("cards", "slots", "white-outline.png", NULL);
  slot_pixbuf = get_pixbuf (buffer);
  g_free (buffer);
  buffer = g_build_filename ("blackjack", "baize.png", NULL);
  default_background_pixmap = get_pixmap (buffer);
  g_free (buffer);
}

void
bj_slot_free_pixmaps (void)
{
  if (slot_pixbuf != NULL)
    g_object_unref (slot_pixbuf);

  if (default_background_pixmap != NULL)
    g_object_unref (default_background_pixmap);
}

void 
bj_slot_add (gint id, gint x, gint y)
{
  hslot_type hslot = (hslot_type) g_malloc (sizeof (slot_type));

  hslot->id = id;
  hslot->cards = NULL;
  hslot->x = x;
  hslot->y = y;

  hslot->dx = hslot->dy = 0;
  hslot->expansion_depth = 0;

  hslot->dx = x_expanded_offset;
    
  hslot->length = hslot->exposed = 0;
  bj_slot_update_length (hslot);

  if (slot_list)
    slot_list = g_list_append (slot_list, hslot);
  else {
    slot_list = g_list_alloc ();
    slot_list->data = hslot;
  }
}

hslot_type
bj_slot_add_before_slot (hslot_type next_slot, gint id, gint x, gint y)
{
  GList *list_ptr = NULL;

  hslot_type hslot = (hslot_type) g_malloc (sizeof (slot_type));

  hslot->id = id;
  hslot->cards = NULL;
  hslot->x = x;
  hslot->y = y;

  hslot->dx = hslot->dy = 0;
  hslot->expansion_depth = 0;

  hslot->dx = x_expanded_offset;
    
  hslot->length = hslot->exposed = 0;
  bj_slot_update_length (hslot);

  if (slot_list)
    {
      list_ptr = g_list_find (slot_list, next_slot);
      slot_list = g_list_insert_before (slot_list, list_ptr, hslot);
    }
  else {
    slot_list = g_list_alloc ();
    slot_list->data = hslot;
  }
  return hslot;
}

void 
bj_slot_pressed (gint x, gint y, hslot_type *slot, gint *cardid) 
{
  GList *tempptr;

  gint num_cards;
  gboolean got_slot = FALSE;

  *slot = NULL;
  *cardid = -1;

  for (tempptr = g_list_last (slot_list); tempptr; tempptr = tempptr->prev)
    {

      hslot_type hslot = (hslot_type) tempptr->data;

      /* if point is within our rectangle */
      if (hslot->x < x && x < hslot->x + hslot->width 
          && hslot->y < y && y < hslot->y + hslot->height) 
      {
        num_cards = hslot->length;
        
        if ( got_slot == FALSE || num_cards > 0 )
          {  
            /* if we support exposing more than one card,
             * find the exact card  */
            
            gint depth = 1;
            
            if (hslot->dx > 0)		
              depth += (x - hslot->x) / hslot->dx;
            else if (hslot->dy > 0)
              depth += (y - hslot->y) / hslot->dy;
            
            /* account for the last card getting much more display area
             * or no cards */
            
            if (depth > hslot->exposed)
              depth = hslot->exposed;

            *slot = hslot;
            
            /* card = #cards in slot + card chosen (indexed in # exposed cards) - # exposed cards */

            *cardid = num_cards + depth - hslot->exposed;
            
            /* this is the topmost slot with a card */
            /* take it and run*/
            if ( num_cards > 0 )
              break;
            
            got_slot = TRUE;
          }
      }
  }
}

void 
bj_slot_update_length (hslot_type hslot) 
{
  gint delta = g_list_length (hslot->cards) - hslot->length;

  hslot->length += delta;
  hslot->exposed += delta;

  if (0 < hslot->expansion_depth && hslot->expansion_depth < hslot->exposed)
    hslot->exposed = hslot->expansion_depth;

  if ((hslot->dx == 0 && hslot->dy == 0 && hslot->exposed > 1) 
      || (hslot->length > 0 && hslot->exposed < 1))
    hslot->exposed = 1;

  delta = hslot->exposed ? hslot->exposed - 1 : 0;

  hslot->width = bj_card_get_width () + delta * hslot->dx;
  //hslot->height = get_card_height () + delta * hslot->dy;
  hslot->height = bj_card_get_height ();
}

GList* 
bj_slot_get_list ()
{
  return slot_list;
}

hslot_type
bj_slot_get (gint slotid)
{
  GList* tempptr;
  
  for (tempptr = slot_list; tempptr; tempptr = tempptr->next)
    if (((hslot_type) tempptr->data)-> id == slotid)
      return (hslot_type)tempptr->data;
  return NULL;
}

void
bj_slot_add_cards (GList* newcards, hslot_type hslot)
{

  hslot->cards = g_list_concat (hslot->cards, newcards);
  bj_slot_update_length (hslot);
}

void
bj_slot_delete (hslot_type hslot) 
{
  GList* temptr;
  
  for (temptr = hslot->cards; temptr; temptr = temptr->next)
    free (temptr->data);
  g_list_free (hslot->cards);
  free (hslot);
}

void
delete_surface()
{
  GList* temptr;

  // delete card slots
  for (temptr = slot_list; temptr; temptr = temptr->next)
    {
      bj_slot_delete ((slot_type*)temptr->data);
      temptr->data = NULL;
    }
  g_list_free (slot_list);
  slot_list = NULL;

  // delete chip stacks
  bj_chip_stack_delete_all ();

}