/* vi: set ts=2:
 +-------------------+  Christian Schlittchen <corwin@amber.kn-bremen.de>
 |                   |  Enno Rehling <enno@eressea.de>
 | Eressea PBEM host |  Katja Zedel <katze@felidae.kn-bremen.de>
 | (c) 1998 - 2003   |  Henning Peters <faroul@beyond.kn-bremen.de>
 |                   |  Ingo Wilken <Ingo.Wilken@informatik.uni-oldenburg.de>
 +-------------------+  Stefan Reich <reich@halbling.de>

 This program may not be used, modified or distributed 
 without prior permission by the authors of Eressea.
 
 */
#include <platform.h>
#include <kernel/config.h>
#include "command.h"

#include <kernel/order.h>

#include <util/umlaut.h>
#include <util/language.h>
#include <util/log.h>
#include <util/parser.h>

/* libc includes */
#include <assert.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>

typedef struct command {
  parser fun;
  struct tnode *nodes;
} command;

tnode *stree_find(const syntaxtree * stree, const struct locale *lang)
{
  while (stree) {
    if (stree->lang == lang)
      return stree->root;
    stree = stree->next;
  }
  return NULL;
}

syntaxtree *stree_create(void)
{
  syntaxtree *sroot = NULL;
  const struct locale *lang = locales;
  while (lang) {
    syntaxtree *stree = (syntaxtree *) malloc(sizeof(syntaxtree));
    stree->lang = lang;
    stree->next = sroot;
    sroot = stree;
    lang = nextlocale(lang);
  }
  return sroot;
}

void
add_command(struct tnode *keys, struct tnode *tnext,
  const char *str, parser fun)
{
  command *cmd = (command *) malloc(sizeof(command));
  variant var;

  cmd->fun = fun;
  cmd->nodes = tnext;
  var.v = cmd;
  addtoken(keys, str, var);
}

static int do_command_i(const struct tnode *keys, void *u, struct order *ord)
{
  const char *c;
  variant var;

  c = getstrtoken();
  if (findtoken(keys, c, &var) == E_TOK_SUCCESS) {
    command *cmd = (command *) var.v;
    if (cmd->nodes && *c) {
      assert(!cmd->fun);
      return do_command_i(cmd->nodes, u, ord);
    } else if (cmd->fun) {
      cmd->fun(cmd->nodes, u, ord);
      return E_TOK_SUCCESS;
    }
  }
  return E_TOK_NOMATCH;
}

void do_command(const struct tnode *keys, void *u, struct order *ord)
{
  init_tokens(ord);
  skip_token();
  if (do_command_i(keys, u, ord) != E_TOK_SUCCESS) {
    char *cmd = getcommand(ord);
    log_warning(("%s failed command '%s'\n", unitname(u), cmd));
    free(cmd);
  }
}