/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * Copyright (©) 2002,2007 Tim Rightnour
 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
 * Copyright (©) 1992,2007 Frank Tore Johansen
 * 
 * Deliantra 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
 * 
 * The authors can be reached via e-mail to <support@deliantra.net>
 */

/* This weather system was written for crossfire by Tim Rightnour */

#include <global.h>
#include <tod.h>
#include <map.h>
#ifndef __CEXTRACT__
# include <sproto.h>
#endif

static const int season_timechange[5][HOURS_PER_DAY] = {
  /* 0  1   2   3   4   5   6   7   8   9  10  11  12  13  14   1   2   3   4   5   6   7   8   9  10  11  12  13 */
  { 0,  0,  0,  0,  0,  0,  0, -1, -1, -1, -1, -1, -1, -1, -1,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  1,  1,  1},
  { 0,  0,  0,  0,  0,  0, -1, -1, -1, -1, -1, -1, -1,  0,  0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  1,  1,  0},
  { 0,  0,  0,  0,  0, -1, -1, -1, -1, -1, -1,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  1,  0},
  { 0,  0,  0,  0,  0, -1, -1, -1, -1, -1,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  0},
  { 0,  0,  0,  0,  0,  0, -1, -1, -1, -1, -1, -1,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  1,  0}
};

void
maptile::set_darkness_map ()
{
  timeofday_t tod;

  if (!outdoor)
    return;

  get_tod (&tod);
  darkness = 0;

  for (int i = HOURS_PER_DAY / 2; i < HOURS_PER_DAY; i++)
    change_map_light (season_timechange[tod.season][i]);

  for (int i = 0; i <= tod.hour; i++)
    change_map_light (season_timechange[tod.season][i]);
}

/*
 * Compute the darkness level for all maps in the game.  Requires the
 * time of day as an argument.
 */

static void
dawn_to_dusk (const timeofday_t * tod)
{
  /* If the light level isn't changing, no reason to do all
   * the work below.
   */
  if (season_timechange[tod->season][tod->hour] == 0)
    return;

  maptile::change_all_map_light (season_timechange[tod->season][tod->hour]);
}

void
adjust_daylight ()
{
  timeofday_t tod;

  get_tod (&tod);
  dawn_to_dusk (&tod);
}