/* 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 "crmessage.h"

#include "message.h"
#include "goodies.h"
#include "log.h"

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>

/** type to string conversion **/
typedef struct tsf_list {
  struct tsf_list *next;
  const char *name;
  tostring_f fun;
} tsf_list;

static tsf_list *tostringfs;

static tostring_f tsf_find(const char *name)
{
  if (name != NULL) {
    tsf_list *tsf;
    for (tsf = tostringfs; tsf; tsf = tsf->next) {
      if (!strcmp(tsf->name, name))
        return tsf->fun;
    }
  }
  return NULL;
}

void tsf_register(const char *name, tostring_f fun)
{
  tsf_list *tsf;
  for (tsf = tostringfs; tsf; tsf = tsf->next) {
    if (!strcmp(tsf->name, name))
      break;
  }
  if (tsf == NULL) {
    tsf = malloc(sizeof(tsf_list));
    tsf->fun = fun;
    tsf->name = name;
    tsf->next = tostringfs;
    tostringfs = tsf;
  }
}

/** crmesssage **/
typedef struct crmessage_type {
  const struct message_type *mtype;
  tostring_f *renderers;
  struct crmessage_type *next;
} crmessage_type;

#define CRMAXHASH 63
static crmessage_type *crtypes[CRMAXHASH];

static crmessage_type *crt_find(const struct message_type *mtype)
{
  unsigned int hash = hashstring(mtype->name) % CRMAXHASH;
  crmessage_type *found = NULL;
  crmessage_type *type = crtypes[hash];
  while (type) {
    if (type->mtype == mtype)
      found = type;
    type = type->next;
  }
  return found;
}

void crt_register(const struct message_type *mtype)
{
  unsigned int hash = hashstring(mtype->name) % CRMAXHASH;
  crmessage_type *crt = crtypes[hash];
  while (crt && crt->mtype != mtype) {
    crt = crt->next;
  }
  if (!crt) {
    int i;
    crt = malloc(sizeof(crmessage_type));
    crt->mtype = mtype;
    crt->next = crtypes[hash];
    crtypes[hash] = crt;
    if (mtype->nparameters > 0) {
      crt->renderers = malloc(sizeof(tostring_f) * mtype->nparameters);
    } else {
      crt->renderers = NULL;
    }

    /* can be scrapped for memory vs. speed */
    for (i = 0; i != mtype->nparameters; ++i) {
      crt->renderers[i] = tsf_find(mtype->types[i]->name);
    }
  }
}

int cr_render(const message * msg, char *buffer, const void *userdata)
{
  int i;
  char *c = buffer;
  struct crmessage_type *crt = crt_find(msg->type);

  if (crt == NULL)
    return -1;
  for (i = 0; i != msg->type->nparameters; ++i) {
    if (crt->renderers[i] == NULL) {
      log_error(("No renderer for argument %s:%s of \"%s\"\n",
          msg->type->pnames[i], msg->type->types[i]->name, msg->type->name));
      continue;                 /* strcpy(c, (const char*)msg->locale_string(u->faction->locale, parameters[i])); */
    } else {
      if (crt->renderers[i] (msg->parameters[i], c, userdata) != 0)
        continue;
    }
    c += strlen(c);
    sprintf(c, ";%s\n", msg->type->pnames[i]);
    c += strlen(c);
  }
  return 0;
}

int cr_string(variant var, char *buffer, const void *userdata)
{
  sprintf(buffer, "\"%s\"", (const char *)var.v);
  unused(userdata);
  return 0;
}

int cr_int(variant var, char *buffer, const void *userdata)
{
  sprintf(buffer, "%d", var.i);
  unused(userdata);
  return 0;
}

int cr_ignore(variant var, char *buffer, const void *userdata)
{
  unused(var);
  unused(buffer);
  unused(userdata);
  return -1;
}