/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007,2008,2009 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * 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 Affero 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 Affero GNU General Public License
 * and 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>
 */

#include <global.h>
#include <material.h>

//+GPL

/* convert materialname to materialtype_t */

materialtype_t *
name_to_material (const shstr_cmp name)
{
  for (materialtype_t *mt = materialt; mt; mt = mt->next)
    if (name == mt->name)
      return mt;

  return 0;
}

/* when doing transmutation of objects, we have to recheck the resistances,
 * as some that did not apply previously, may apply now.
 */
void
transmute_materialname (object *op, const object *change)
{
  materialtype_t *mt;
  int j;

  if (!op->materialname)
    return;

  if (op->materialname != change->materialname)
    return;

  if (!op->is_armor ())
    return;

  mt = name_to_material (op->materialname);
  if (!mt)
    {
      LOG (llevError, "archetype '%s>%s' uses nonexistent material '%s'\n", &op->arch->archname, &op->name, &op->materialname);
      return;
    }

  for (j = 0; j < NROFATTACKS; j++)
    if (op->resist[j] == 0 && change->resist[j] != 0)
      {
        op->resist[j] += mt->mod[j];
        if (op->resist[j] > 100)
          op->resist[j] = 100;
        if (op->resist[j] < -100)
          op->resist[j] = -100;
      }
}

/* set the materialname and type for an item */
void
set_materialname (object *op, int difficulty, materialtype_t *nmt)
{
  materialtype_t *mt, *lmt;

  if (!op->materialname)
    return;

  if (nmt)
    lmt = nmt;
  else
    {
      lmt = 0;

      for (mt = materialt; mt; mt = mt->next)
        if (op->materials & mt->material && rndm (1, 100) <= mt->chance &&
            difficulty >= mt->difficulty && (op->magic >= mt->magic || mt->magic == 0))
          {
            lmt = mt;
            if (!(op->is_weapon () || op->is_armor ()))
              break;
          }
    }

  if (lmt)
    {
      if (op->stats.dam && op->is_weapon ())
        {
          op->stats.dam += lmt->damage;
          if (op->stats.dam < 1)
            op->stats.dam = 1;
        }

      if (op->stats.sp && op->type == BOW)
        op->stats.sp += lmt->sp;
      if (op->stats.wc && op->is_weapon ())
        op->stats.wc += lmt->wc;
      if (op->is_armor ())
        {
          if (op->stats.ac)
            op->stats.ac += lmt->ac;

          for (int j = 0; j < NROFATTACKS; j++)
            if (op->resist[j] != 0)
              {
                op->resist[j] += lmt->mod[j];
                if (op->resist[j] > 100)
                  op->resist[j] = 100;
                if (op->resist[j] < -100)
                  op->resist[j] = -100;
              }
        }

      op->materialname = lmt->name;
      /* dont make it unstackable if it doesn't need to be */
      if (op->is_weapon () || op->is_armor ())
        {
          op->weight = (op->weight * lmt->weight) / 100;
          op->value = (op->value * lmt->value) / 100;
        }
    }
}

//TODO: make this a constructor
static materialtype_t *
get_empty_mat (void)
{
  materialtype_t *mt;
  int i;

  mt = new materialtype_t;

  mt->name        = shstr_unknown;
  mt->description = 0;

  for (i = 0; i < NROFATTACKS; i++)
    {
      mt->save[i] = 0;
      mt->mod[i]  = 0;
    }

  mt->chance      = 0;
  mt->difficulty  = 0;
  mt->magic       = 0;
  mt->damage      = 0;
  mt->wc          = 0;
  mt->ac          = 0;
  mt->sp          = 0;
  mt->weight      = 100;
  mt->value       = 100;
  mt->density     = 1;
  mt->next        = 0;

  return mt;
}

//-GPL

const materialtype_t *
object::dominant_material () const
{
  if (materialtype_t *mt = name_to_material (materialname))
    return mt;

  return name_to_material (shstr_unknown);
}

void
load_materials (void)
{
  char filename[MAX_BUF];

  sprintf (filename, "%s/materials", settings.datadir);
  LOG (llevDebug, "Reading material type data from %s...\n", filename);

  //TODO: somehow free old materials, or update them in-place
  materialt = 0;

  object_thawer thawer (filename);

  if (!thawer)
    {
      LOG (llevError, "Cannot open %s for reading\n", filename);
      goto done;
    }

  while (thawer.kw != KW_name)
    {
      thawer.next ();

      if (thawer.kw == KW_EOF)
        goto done;
    }

  materialtype_t *mt;

  for (;;)
    {
      switch (thawer.kw)
        {
          case KW_name:
            mt = get_empty_mat ();
            mt->next = materialt;
            materialt = mt;

            thawer.get (mt->name);
            mt->description = mt->name;
            break;

          case KW_description:
            thawer.get (mt->description);
            break;

          case KW_material:
            thawer.get (mt->material);
            break;

          case KW_saves:
            {
              const char *cp = thawer.get_str () - 1;

              for (int i = 0; i < NROFATTACKS; i++)
                {
                  if (!cp)
                    {
                      mt->save[i] = 0;
                      continue;
                    }

                  int value;
                  ++cp;
                  sscanf (cp, "%d", &value);
                  mt->save[i] = (sint8) value;
                  cp = strchr (cp, ',');
                }
            }
            break;

          case KW_mods:
            {
              const char *cp = thawer.get_str () - 1;

              for (int i = 0; i < NROFATTACKS; i++)
                {
                  if (!cp)
                    {
                      mt->save[i] = 0;
                      continue;
                    }

                  ++cp;
                  int value;
                  sscanf (cp, "%d", &value);
                  mt->mod[i] = (sint8) value;
                  cp = strchr (cp, ',');
                }
            }
            break;

          case KW_chance:  thawer.get (mt->chance);     break;
          case KW_difficulty: // cf+ alias, not original cf
          case KW_diff:    thawer.get (mt->difficulty); break;
          case KW_magic:   thawer.get (mt->magic);      break;
          case KW_dam:        // cf+ alias, not original cf
          case KW_damage:  thawer.get (mt->damage);     break;
          case KW_wc:      thawer.get (mt->wc);         break;
          case KW_ac:      thawer.get (mt->ac);         break;
          case KW_sp:      thawer.get (mt->sp);         break;
          case KW_weight:  thawer.get (mt->weight);     break;
          case KW_value:   thawer.get (mt->value);      break;
          case KW_density: thawer.get (mt->density);    break;

          case KW_EOF:
            goto done;

          default:
            if (!thawer.parse_error ("materials file", "materials"))
              goto done;
            break;
        }

      thawer.next ();
    }

done:
  if (!materialt)
    materialt = get_empty_mat ();

  LOG (llevDebug, "Done.\n");
}