/*
 * This program 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 2
 * 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, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

/** \file
 * \ingroup wm
 */

#include <stdio.h>

#include "CLG_log.h"

#include "MEM_guardedalloc.h"

#include "BLI_utildefines.h"
#include "BLI_ghash.h"
#include "BLI_listbase.h"

#include "WM_types.h"
#include "WM_message.h"
#include "message_bus/intern/wm_message_bus_intern.h"

/* -------------------------------------------------------------------------- */

static uint wm_msg_static_gset_hash(const void *key_p)
{
  const wmMsgSubscribeKey_Static *key = key_p;
  const wmMsgParams_Static *params = &key->msg.params;
  uint k = params->event;
  return k;
}
static bool wm_msg_static_gset_cmp(const void *key_a_p, const void *key_b_p)
{
  const wmMsgParams_Static *params_a = &((const wmMsgSubscribeKey_Static *)key_a_p)->msg.params;
  const wmMsgParams_Static *params_b = &((const wmMsgSubscribeKey_Static *)key_b_p)->msg.params;
  return !((params_a->event == params_b->event));
}
static void wm_msg_static_gset_key_free(void *key_p)
{
  wmMsgSubscribeKey *key = key_p;
  wmMsgSubscribeValueLink *msg_lnk_next;
  for (wmMsgSubscribeValueLink *msg_lnk = key->values.first; msg_lnk; msg_lnk = msg_lnk_next) {
    msg_lnk_next = msg_lnk->next;
    BLI_remlink(&key->values, msg_lnk);
    MEM_freeN(msg_lnk);
  }
  MEM_freeN(key);
}

static void wm_msg_static_repr(FILE *stream, const wmMsgSubscribeKey *msg_key)
{
  const wmMsgSubscribeKey_Static *m = (wmMsgSubscribeKey_Static *)msg_key;
  fprintf(stream,
          "<wmMsg_Static %p, "
          "id='%s', "
          "values_len=%d\n",
          m,
          m->msg.head.id,
          BLI_listbase_count(&m->head.values));
}

void WM_msgtypeinfo_init_static(wmMsgTypeInfo *msgtype_info)
{
  msgtype_info->gset.hash_fn = wm_msg_static_gset_hash;
  msgtype_info->gset.cmp_fn = wm_msg_static_gset_cmp;
  msgtype_info->gset.key_free_fn = wm_msg_static_gset_key_free;
  msgtype_info->repr = wm_msg_static_repr;

  msgtype_info->msg_key_size = sizeof(wmMsgSubscribeKey_Static);
}

/* -------------------------------------------------------------------------- */

wmMsgSubscribeKey_Static *WM_msg_lookup_static(struct wmMsgBus *mbus,
                                               const wmMsgParams_Static *msg_key_params)
{
  wmMsgSubscribeKey_Static key_test;
  key_test.msg.params = *msg_key_params;
  return BLI_gset_lookup(mbus->messages_gset[WM_MSG_TYPE_STATIC], &key_test);
}

void WM_msg_publish_static_params(struct wmMsgBus *mbus, const wmMsgParams_Static *msg_key_params)
{
  CLOG_INFO(WM_LOG_MSGBUS_PUB, 2, "static(event=%d)", msg_key_params->event);

  wmMsgSubscribeKey_Static *key = WM_msg_lookup_static(mbus, msg_key_params);
  if (key) {
    WM_msg_publish_with_key(mbus, &key->head);
  }
}

void WM_msg_publish_static(struct wmMsgBus *mbus, int event)
{
  WM_msg_publish_static_params(mbus,
                               &(wmMsgParams_Static){
                                   .event = event,
                               });
}

void WM_msg_subscribe_static_params(struct wmMsgBus *mbus,
                                    const wmMsgParams_Static *msg_key_params,
                                    const wmMsgSubscribeValue *msg_val_params,
                                    const char *id_repr)
{
  wmMsgSubscribeKey_Static msg_key_test = {{NULL}};

  /* use when added */
  msg_key_test.msg.head.id = id_repr;
  msg_key_test.msg.head.type = WM_MSG_TYPE_STATIC;
  /* for lookup */
  msg_key_test.msg.params = *msg_key_params;

  WM_msg_subscribe_with_key(mbus, &msg_key_test.head, msg_val_params);
}

void WM_msg_subscribe_static(struct wmMsgBus *mbus,
                             int event,
                             const wmMsgSubscribeValue *msg_val_params,
                             const char *id_repr)
{
  WM_msg_subscribe_static_params(mbus,
                                 &(const wmMsgParams_Static){
                                     .event = event,
                                 },
                                 msg_val_params,
                                 id_repr);
}
