/**********GROUP CHAT FUNCTIONS ************/

/* Group chat types for tox_callback_group_invite function.
 *
 * TOX_GROUPCHAT_TYPE_TEXT groupchats must be accepted with the tox_join_groupchat() function.
 * The function to accept TOX_GROUPCHAT_TYPE_AV is in toxav.
 */
enum {
    TOX_GROUPCHAT_TYPE_TEXT,
    TOX_GROUPCHAT_TYPE_AV
};

/* Set the callback for group invites.
 *
 *  Function(Tox *tox, int32_t friendnumber, uint8_t type, const uint8_t *data, uint16_t length, void *userdata)
 *
 * data of length is what needs to be passed to join_groupchat().
 *
 * for what type means see the enum right above this comment.
 */
void tox_callback_group_invite(Tox *tox, void (*function)(Tox *tox, int32_t, uint8_t, const uint8_t *, uint16_t,
                               void *), void *userdata);

/* Set the callback for group messages.
 *
 *  Function(Tox *tox, int groupnumber, int peernumber, const uint8_t * message, uint16_t length, void *userdata)
 */
void tox_callback_group_message(Tox *tox, void (*function)(Tox *tox, int, int, const uint8_t *, uint16_t, void *),
                                void *userdata);

/* Set the callback for group actions.
 *
 *  Function(Tox *tox, int groupnumber, int peernumber, const uint8_t * action, uint16_t length, void *userdata)
 */
void tox_callback_group_action(Tox *tox, void (*function)(Tox *tox, int, int, const uint8_t *, uint16_t, void *),
                               void *userdata);

/* Set callback function for title changes.
 *
 * Function(Tox *tox, int groupnumber, int peernumber, uint8_t * title, uint8_t length, void *userdata)
 * if peernumber == -1, then author is unknown (e.g. initial joining the group)
 */
void tox_callback_group_title(Tox *tox, void (*function)(Tox *tox, int, int, const uint8_t *, uint8_t,
                              void *), void *userdata);

/* Set callback function for peer name list changes.
 *
 * It gets called every time the name list changes(new peer/name, deleted peer)
 *  Function(Tox *tox, int groupnumber, int peernumber, TOX_CHAT_CHANGE change, void *userdata)
 */
typedef enum {
    TOX_CHAT_CHANGE_PEER_ADD,
    TOX_CHAT_CHANGE_PEER_DEL,
    TOX_CHAT_CHANGE_PEER_NAME,
} TOX_CHAT_CHANGE;

void tox_callback_group_namelist_change(Tox *tox, void (*function)(Tox *tox, int, int, uint8_t, void *),
                                        void *userdata);

/* Creates a new groupchat and puts it in the chats array.
 *
 * return group number on success.
 * return -1 on failure.
 */
int tox_add_groupchat(Tox *tox);

/* Delete a groupchat from the chats array.
 *
 * return 0 on success.
 * return -1 if failure.
 */
int tox_del_groupchat(Tox *tox, int groupnumber);

/* Copy the name of peernumber who is in groupnumber to name.
 * name must be at least TOX_MAX_NAME_LENGTH long.
 *
 * return length of name if success
 * return -1 if failure
 */
int tox_group_peername(const Tox *tox, int groupnumber, int peernumber, uint8_t *name);

/* Copy the public key of peernumber who is in groupnumber to public_key.
 * public_key must be TOX_PUBLIC_KEY_SIZE long.
 *
 * returns 0 on success
 * returns -1 on failure
 */
int tox_group_peer_pubkey(const Tox *tox, int groupnumber, int peernumber, uint8_t *public_key);

/* invite friendnumber to groupnumber
 * return 0 on success
 * return -1 on failure
 */
int tox_invite_friend(Tox *tox, int32_t friendnumber, int groupnumber);

/* Join a group (you need to have been invited first.) using data of length obtained
 * in the group invite callback.
 *
 * returns group number on success
 * returns -1 on failure.
 */
int tox_join_groupchat(Tox *tox, int32_t friendnumber, const uint8_t *data, uint16_t length);

/* send a group message
 * return 0 on success
 * return -1 on failure
 */
int tox_group_message_send(Tox *tox, int groupnumber, const uint8_t *message, uint16_t length);

/* send a group action
 * return 0 on success
 * return -1 on failure
 */
int tox_group_action_send(Tox *tox, int groupnumber, const uint8_t *action, uint16_t length);

/* set the group's title, limited to MAX_NAME_LENGTH
 * return 0 on success
 * return -1 on failure
 */
int tox_group_set_title(Tox *tox, int groupnumber, const uint8_t *title, uint8_t length);

/* Get group title from groupnumber and put it in title.
 * title needs to be a valid memory location with a max_length size of at least MAX_NAME_LENGTH (128) bytes.
 *
 *  return length of copied title if success.
 *  return -1 if failure.
 */
int tox_group_get_title(Tox *tox, int groupnumber, uint8_t *title, uint32_t max_length);

/* Check if the current peernumber corresponds to ours.
 *
 * return 1 if the peernumber corresponds to ours.
 * return 0 on failure.
 */
unsigned int tox_group_peernumber_is_ours(const Tox *tox, int groupnumber, int peernumber);

/* Return the number of peers in the group chat on success.
 * return -1 on failure
 */
int tox_group_number_peers(const Tox *tox, int groupnumber);

/* List all the peers in the group chat.
 *
 * Copies the names of the peers to the name[length][TOX_MAX_NAME_LENGTH] array.
 *
 * Copies the lengths of the names to lengths[length]
 *
 * returns the number of peers on success.
 *
 * return -1 on failure.
 */
int tox_group_get_names(const Tox *tox, int groupnumber, uint8_t names[][TOX_MAX_NAME_LENGTH], uint16_t lengths[],
                        uint16_t length);

/* Return the number of chats in the instance m.
 * You should use this to determine how much memory to allocate
 * for copy_chatlist. */
uint32_t tox_count_chatlist(const Tox *tox);

/* Copy a list of valid chat IDs into the array out_list.
 * If out_list is NULL, returns 0.
 * Otherwise, returns the number of elements copied.
 * If the array was too small, the contents
 * of out_list will be truncated to list_size. */
uint32_t tox_get_chatlist(const Tox *tox, int32_t *out_list, uint32_t list_size);

/* return the type of groupchat (TOX_GROUPCHAT_TYPE_) that groupnumber is.
 *
 * return -1 on failure.
 * return type on success.
 */
int tox_group_get_type(const Tox *tox, int groupnumber);