/*
 * 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 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>
 */

#include <global.h>
#include <sproto.h>
#include <spells.h>

static partylist *firstparty = NULL;    /* Keeps track of first party in list */
static partylist *lastparty = NULL;     /*Keeps track of last party in list */

partylist *
get_firstparty (void)
{
  return firstparty;
}

void remove_party (partylist *target_party);

/* Forms the party struct for a party called 'params'. it is the responsibility
 * of the caller to ensure that the name is unique, and that it is placed in the 
 * main party list correctly */
static partylist *
form_party (object *op, const char *params)
{
  partylist *newparty;

  newparty = (partylist *) malloc (sizeof (partylist));
  newparty->partyname = strdup (params);
  newparty->total_exp = 0;
  newparty->kills = 0;
  newparty->passwd[0] = '\0';
  newparty->next = NULL;
  newparty->partyleader = strdup (op->name);
  new_draw_info_format (NDI_UNIQUE, 0, op, "You have formed party: %s", newparty->partyname);
  op->contr->party = newparty;

  return newparty;
}

void
remove_party (partylist *target_party)
{
  partylist *tmpparty;
  partylist *previousparty;
  partylist *nextparty;

  if (firstparty == NULL)
    {
      LOG (llevError, "remove_party(): I was asked to remove party %s, but no parties are defined", target_party->partyname);
      return;
    }

  for_all_players (pl)
    if (pl->party == target_party)
      pl->party = NULL;

  /* special case-ism for parties at the beginning and end of the list */
  if (target_party == firstparty)
    {
      firstparty = firstparty->next;

      if (target_party->partyleader)
        free (target_party->partyleader);

      if (target_party->partyname)
        free (target_party->partyname);

      free (target_party);
      return;
    }
  else if (target_party == lastparty)
    {
      for (tmpparty = firstparty; tmpparty->next != NULL; tmpparty = tmpparty->next)
        {
          if (tmpparty->next == target_party)
            {
              lastparty = tmpparty;

              if (target_party->partyleader)
                free (target_party->partyleader);

              if (target_party->partyname)
                free (target_party->partyname);

              free (target_party);
              lastparty->next = NULL;
              return;
            }
        }
    }
  for (tmpparty = firstparty; tmpparty->next != NULL; tmpparty = tmpparty->next)
    if (tmpparty->next == target_party)
      {
        previousparty = tmpparty;
        nextparty = tmpparty->next->next;
        /* this should be safe, because we already dealt with the lastparty case */

        previousparty->next = nextparty;
        if (target_party->partyleader)
          free (target_party->partyleader);
        if (target_party->partyname)
          free (target_party->partyname);
        free (target_party);
        return;
      }
}

/* Remove unused parties, this could be made to scale a lot better. */
void
obsolete_parties (void)
{
  int player_count;
  partylist *party;
  partylist *next = NULL;

  if (!firstparty)
    return;                     /* we can't obsolete parties if there aren't any */
  for (party = firstparty; party != NULL; party = next)
    {
      next = party->next;
      player_count = 0;
      for_all_players (pl)
        if (pl->party == party)
          player_count++;
      if (player_count == 0)
        remove_party (party);
    }
}

void
add_kill_to_party (partylist *party, const char *killer, const char *dead, long exp)
{
  int i, pos;

  if (party == NULL)
    return;

  if (party->kills >= PARTY_KILL_LOG)
    {
      pos = PARTY_KILL_LOG - 1;
      for (i = 0; i < PARTY_KILL_LOG - 1; i++)
        party->party_kills[i] = party->party_kills[i + 1];
    }
  else
    pos = party->kills;

  party->kills++;
  party->total_exp += exp;
  party->party_kills[pos].exp = exp;
  assign (party->party_kills[pos].killer, killer);
  assign (party->party_kills[pos].dead, dead);
  party->party_kills[pos].killer[MAX_NAME] = 0;
  party->party_kills[pos].dead[MAX_NAME] = 0;
}

int
confirm_party_password (object *op)
{
  partylist *tmppartylist;

  for (tmppartylist = firstparty; tmppartylist != NULL; tmppartylist = tmppartylist->next)
    {
      if (!strcmp (op->contr->party_to_join->partyname, tmppartylist->partyname))
        {
          if (strcmp (op->contr->write_buf + 1, tmppartylist->passwd) == 0)
            return 0;
          else
            return 1;
        }
    }
  return 1;
}

void
receive_party_password (object *op, char k)
{

  if (confirm_party_password (op) == 0)
    {
      partylist *joined_party = op->contr->party_to_join;
      char buf[MAX_BUF];

      op->contr->party = op->contr->party_to_join;
      op->contr->party_to_join = NULL;
      new_draw_info_format (NDI_UNIQUE, 0, op, "You have joined party: %s\n", joined_party->partyname);
      snprintf (buf, MAX_BUF, "%s joins party %s", &op->name, joined_party->partyname);
      send_party_message (op, buf);
      op->contr->ns->state = ST_PLAYING;
      return;
    }
  else
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You entered the wrong password");
      op->contr->party_to_join = NULL;
      op->contr->ns->state = ST_PLAYING;
      return;
    }
}

void
send_party_message (object *op, char *msg)
{
  for_all_players (pl)
    if (pl->ob->contr->party == op->contr->party && pl->ob != op)
      new_draw_info (NDI_WHITE, 0, pl->ob, msg);
}

int
command_gsay (object *op, char *params)
{
  char party_params[MAX_BUF];

  if (!params)
    return 0;

  strcpy (party_params, "say ");
  strcat (party_params, params);
  command_party (op, party_params);
  return 0;
}

int
command_party (object *op, char *params)
{
  char buf[MAX_BUF];
  partylist *tmpparty, *oldparty;       /* For iterating over linked list */
  char *currentparty;           /* For iterating over linked list */

  if (params == NULL)
    {
      if (op->contr->party == NULL)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You are not a member of any party.");
          new_draw_info (NDI_UNIQUE, 0, op, "For help try: party help");
        }
      else
        {
          currentparty = op->contr->party->partyname;
          new_draw_info_format (NDI_UNIQUE, 0, op, "You are a member of party %s.", currentparty);
        }
      return 1;
    }

  if (strcmp (params, "help") == 0)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "To form a party type: party form <partyname>");
      new_draw_info (NDI_UNIQUE, 0, op, "To join a party type: party join <partyname>");
      new_draw_info (NDI_UNIQUE, 0, op, "If the party has a passwd, it will you prompt you for it.");
      new_draw_info (NDI_UNIQUE, 0, op, "For a list of current parties type: party list");
      new_draw_info (NDI_UNIQUE, 0, op, "To leave a party type: party leave");
      new_draw_info (NDI_UNIQUE, 0, op, "To change a passwd for a party type: party passwd <password>");
      new_draw_info (NDI_UNIQUE, 0, op, "There is an 8 character max");
      new_draw_info (NDI_UNIQUE, 0, op, "To talk to party members type: party say <msg>");
      new_draw_info (NDI_UNIQUE, 0, op, "To see who is in your party: party who");
      new_draw_info (NDI_UNIQUE, 0, op, "To see what you've killed, type: party kills");
      return 1;
    }

  if (!strncmp (params, "kills", 5))
    {
      int i, max;
      char chr;
      char buffer[80];
      float exp;

      if (op->contr->party == NULL)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You are not a member of any party.");
          return 1;
        }
      tmpparty = op->contr->party;
      if (!tmpparty->kills)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You haven't killed anything yet.");
          return 1;
        }
      max = tmpparty->kills - 1;
      if (max > PARTY_KILL_LOG - 1)
        max = PARTY_KILL_LOG - 1;
      new_draw_info (NDI_UNIQUE, 0, op, "Killed          |          Killer|     Exp");
      new_draw_info (NDI_UNIQUE, 0, op, "----------------+----------------+--------");
      for (i = 0; i <= max; i++)
        {
          exp = tmpparty->party_kills[i].exp;
          chr = ' ';
          if (exp > 1000000)
            {
              exp /= 1000000;
              chr = 'M';
            }
          else if (exp > 1000)
            {
              exp /= 1000;
              chr = 'k';
            }
          sprintf (buffer, "%16s|%16s|%6.1f%c", tmpparty->party_kills[i].dead, tmpparty->party_kills[i].killer, exp, chr);
          new_draw_info (NDI_UNIQUE, 0, op, buffer);
        }
      exp = tmpparty->total_exp;
      chr = ' ';
      if (exp > 1000000)
        {
          exp /= 1000000;
          chr = 'M';
        }
      else if (exp > 1000)
        {
          exp /= 1000;
          chr = 'k';
        }
      new_draw_info (NDI_UNIQUE, 0, op, "----------------+----------------+--------");
      sprintf (buffer, "Totals: %d kills, %.1f%c exp", tmpparty->kills, exp, chr);
      new_draw_info (NDI_UNIQUE, 0, op, buffer);
      return 1;
    }

  if (strncmp (params, "say ", 4) == 0)
    {
      if (op->contr->party == NULL)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You are not a member of any party.");
          return 1;
        }
      params += 4;
      currentparty = op->contr->party->partyname;
      snprintf (buf, MAX_BUF - 1, "[%s] %s says: %s", currentparty, &op->name, params);
      send_party_message (op, buf);
      new_draw_info_format (NDI_LT_GREEN | NDI_UNIQUE, 0, op, "[%s] You say: %s", currentparty, params);
      return 1;
    }

  if (strncmp (params, "form ", 5) == 0)
    {
      int player_count;

      params += 5;
      if (op->contr->party)
        oldparty = op->contr->party;
      else
        oldparty = NULL;

      if (firstparty)
        {
          for (tmpparty = firstparty; tmpparty != NULL; tmpparty = tmpparty->next)
            {
              if (!strcmp (tmpparty->partyname, params))
                {
                  new_draw_info_format (NDI_UNIQUE, 0, op, "The party %s already exists, pick another name", params);
                  return 1;
                }
            }
          lastparty->next = form_party (op, params);
          lastparty = lastparty->next;
        }
      else
        {
          firstparty = form_party (op, params);
          lastparty = firstparty;
        }
      /* 
       * The player might have previously been a member of a party, if so, he will be leaving
       * it, so check if there are any other members and if not, delete the party
       */
      player_count = 0;
      if (oldparty)
        {
          for_all_players (pl)
            if (pl->party == oldparty)
              player_count++;

          if (player_count == 0)
            remove_party (oldparty);
        }

      return 0;
    }                           /* form */

  if (strcmp (params, "leave") == 0)
    {
      if (op->contr->party == NULL)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You are not a member of any party.");
          return 1;
        }
      currentparty = op->contr->party->partyname;
      new_draw_info_format (NDI_UNIQUE, 0, op, "You leave party %s.", currentparty);
      sprintf (buf, "%s leaves party %s.", &op->name, currentparty);
      send_party_message (op, buf);
      op->contr->party = NULL;
      return 1;
    }

  if (strcmp (params, "who") == 0)
    {
      tmpparty = op->contr->party;
      if (op->contr->party == NULL)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You are not a member of any party.");
          return 1;
        }
      new_draw_info_format (NDI_UNIQUE, 0, op, "Members of party: %s.", op->contr->party->partyname);
      for_all_players (pl)
        if (pl->ob->contr->party == op->contr->party)
          {
            if (settings.set_title == TRUE)
              {
                if (pl->ob->contr->own_title[0] != '\0')
                  sprintf (buf, "%3d %s the %s", pl->ob->level, &pl->ob->name, pl->ob->contr->own_title);
                else
                  sprintf (buf, "%3d %s the %s", pl->ob->level, &pl->ob->name, pl->ob->contr->title);
              }
            else
              sprintf (buf, "%3d %s the %s", pl->ob->level, &pl->ob->name, pl->ob->contr->title);
            new_draw_info (NDI_UNIQUE, 0, op, buf);
          }
      return 1;
    }                           /* leave */

  if (strncmp (params, "passwd ", 7) == 0)
    {
      partylist *tmplist;

      params += 7;

      if (op->contr->party == NULL)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You are not a member of a party");
          return 1;
        }

      if (strlen (params) > 8)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "The password must not exceed 8 characters");
          return 1;
        }

      tmplist = firstparty;
      while (tmplist != NULL)
        {
          if (tmplist == op->contr->party)
            {
              strcpy (tmplist->passwd, params);
              new_draw_info_format (NDI_UNIQUE, 0, op, "The password for party %s is %s", tmplist->partyname, tmplist->passwd);
              snprintf (buf, MAX_BUF, "Password for party %s is now %s, changed by %s", tmplist->partyname, tmplist->passwd, &op->name);
              send_party_message (op, buf);
              return 0;
            }
          tmplist = tmplist->next;
        }
      return 0;
    }                           /* passwd */

  if (strcmp (params, "list") == 0)
    {
      partylist *tmplist;

      tmplist = firstparty;

      if (firstparty == NULL)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "There are no parties active right now");
          return 1;
        }

      new_draw_info (NDI_UNIQUE, 0, op, "Party name                       Leader");
      new_draw_info (NDI_UNIQUE, 0, op, "----------                       ------");

      while (tmplist != NULL)
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "%-32s %s", tmplist->partyname, tmplist->partyleader);
          tmplist = tmplist->next;
        }
      return 0;
    }                           /* list */

  if (strncmp (params, "join ", 5) == 0)
    {

      params += 5;

      /* Can't join a party cause non exist */
      if (firstparty == NULL)
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "Party: %s does not exist.  You must form it first", params);
          return 1;
        }

      /* Special case if thier is only one party */
      if (firstparty->next == NULL)
        {
          if (strcmp (firstparty->partyname, params) != 0)
            {
              new_draw_info_format (NDI_UNIQUE, 0, op, "Party: %s does not exist. You must form it first", params);
              return 1;
            }
          else
            {
              if (op->contr->party == firstparty)
                {
                  new_draw_info_format (NDI_UNIQUE, 0, op, "You are already in party: %s", firstparty->partyname);
                  return 1;
                }
              /* found party player wants to join */
              if (firstparty->passwd[0] == '\0')
                {
                  op->contr->party = firstparty;
                  new_draw_info_format (NDI_UNIQUE, 0, op, "You have joined party: %s", firstparty->partyname);
                  snprintf (buf, MAX_BUF, "%s joins party %s", &op->name, firstparty->partyname);
                  send_party_message (op, buf);
                  return 0;
                }
              else
                {
                  get_party_password (op, firstparty);
                  return 0;
                }
            }
        }

      tmpparty = firstparty;
      while (tmpparty != NULL)
        {
          if (strcmp (tmpparty->partyname, params) == 0)
            {
              if (op->contr->party == tmpparty)
                {
                  new_draw_info_format (NDI_UNIQUE, 0, op, "You are already a member of party: %s", tmpparty->partyname);
                  return 1;
                }
              else
                {
                  if (tmpparty->passwd[0] == '\0')
                    {
                      new_draw_info_format (NDI_UNIQUE, 0, op, "You have joined party: %s", tmpparty->partyname);
                      op->contr->party = tmpparty;
                      snprintf (buf, MAX_BUF, "%s joins party %s", &op->name, tmpparty->partyname);
                      send_party_message (op, buf);
                      return 0;
                    }
                  else
                    {
                      get_party_password (op, tmpparty);
                      return 0;
                    }
                }
            }
          else
            tmpparty = tmpparty->next;
        }

      new_draw_info_format (NDI_UNIQUE, 0, op, "Party %s does not exist.  You must form it first.", params);
      return 1;
    }                           /* join */

  new_draw_info (NDI_UNIQUE, 0, op, "To form a party type: party form <partyname>");
  new_draw_info (NDI_UNIQUE, 0, op, "To join a party type: party join <partyname>");
  new_draw_info (NDI_UNIQUE, 0, op, "If the party has a passwd, it will you prompt you for it.");
  new_draw_info (NDI_UNIQUE, 0, op, "For a list of current parties type: party list");
  new_draw_info (NDI_UNIQUE, 0, op, "To leave a party type: party leave");
  new_draw_info (NDI_UNIQUE, 0, op, "To change a passwd for a party type: party passwd <password>");
  new_draw_info (NDI_UNIQUE, 0, op, "There is an 8 character max");
  new_draw_info (NDI_UNIQUE, 0, op, "To talk to party members type: party say <msg>");
  new_draw_info (NDI_UNIQUE, 0, op, "To see who is in your party: party who");
  new_draw_info (NDI_UNIQUE, 0, op, "To see what you've killed, type: party kills");
  return 1;
}