/* SPDX-License-Identifier: GPL-3.0-or-later

 * Copyright © 2023-2026 The TokTok team.

 */

#include "events_alloc.h"

#include <assert.h>

#include <string.h>

#include "../attributes.h"

#include "../bin_pack.h"

#include "../bin_unpack.h"

#include "../ccompat.h"

#include "../mem.h"

#include "../tox.h"

#include "../tox_event.h"

#include "../tox_events.h"

#include "../tox_struct.h"

/*****************************************************

 *

 * :: struct and accessors

 *

 *****************************************************/

struct Tox_Event_Group_Topic {

    uint32_t group_number;

    uint32_t peer_id;

    uint8_t *_Nullable topic;

    uint32_t topic_length;

};

static void tox_event_group_topic_set_group_number(Tox_Event_Group_Topic *_Nonnull group_topic, uint32_t group_number)

{

    assert(group_topic != nullptr);

    group_topic->group_number = group_number;

}

uint32_t tox_event_group_topic_get_group_number(const Tox_Event_Group_Topic *group_topic)

{

    assert(group_topic != nullptr);

    return group_topic->group_number;

}

static void tox_event_group_topic_set_peer_id(Tox_Event_Group_Topic *_Nonnull group_topic, uint32_t peer_id)

{

    assert(group_topic != nullptr);

    group_topic->peer_id = peer_id;

}

uint32_t tox_event_group_topic_get_peer_id(const Tox_Event_Group_Topic *group_topic)

{

    assert(group_topic != nullptr);

    return group_topic->peer_id;

}

static bool tox_event_group_topic_set_topic(Tox_Event_Group_Topic *_Nonnull group_topic,

        const Memory *_Nonnull mem, const uint8_t *_Nullable topic, uint32_t topic_length)

{

    assert(group_topic != nullptr);

    if (group_topic->topic != nullptr) {

        mem_delete(mem, group_topic->topic);

        group_topic->topic = nullptr;

        group_topic->topic_length = 0;

    }

    if (topic == nullptr) {

        assert(topic_length == 0);

        return true;

    }

    if (topic_length == 0) {

        group_topic->topic = nullptr;

        group_topic->topic_length = 0;

        return true;

    }

    uint8_t *topic_copy = (uint8_t *)mem_balloc(mem, topic_length);

    if (topic_copy == nullptr) {

        return false;

    }

    memcpy(topic_copy, topic, topic_length);

    group_topic->topic = topic_copy;

    group_topic->topic_length = topic_length;

    return true;

}

uint32_t tox_event_group_topic_get_topic_length(const Tox_Event_Group_Topic *group_topic)

{

    assert(group_topic != nullptr);

    return group_topic->topic_length;

}

const uint8_t *tox_event_group_topic_get_topic(const Tox_Event_Group_Topic *group_topic)

{

    assert(group_topic != nullptr);

    return group_topic->topic;

}

static void tox_event_group_topic_construct(Tox_Event_Group_Topic *_Nonnull group_topic)

{

    *group_topic = (Tox_Event_Group_Topic) {

        0

    };

}

static void tox_event_group_topic_destruct(Tox_Event_Group_Topic *_Nonnull group_topic, const Memory *_Nonnull mem)

{

    mem_delete(mem, group_topic->topic);

}

bool tox_event_group_topic_pack(

    const Tox_Event_Group_Topic *event, Bin_Pack *bp)

{

    return bin_pack_array(bp, 3)

           && bin_pack_u32(bp, event->group_number)

           && bin_pack_u32(bp, event->peer_id)

           && bin_pack_bin(bp, event->topic, event->topic_length);

}

static bool tox_event_group_topic_unpack_into(Tox_Event_Group_Topic *_Nonnull event, Bin_Unpack *_Nonnull bu)

{

    assert(event != nullptr);

    if (!bin_unpack_array_fixed(bu, 3, nullptr)) {

        return false;

    }

    return bin_unpack_u32(bu, &event->group_number)

           && bin_unpack_u32(bu, &event->peer_id)

           && bin_unpack_bin(bu, &event->topic, &event->topic_length);

}

/*****************************************************

 *

 * :: new/free/add/get/size/unpack

 *

 *****************************************************/

const Tox_Event_Group_Topic *tox_event_get_group_topic(const Tox_Event *event)

{

    return event->type == TOX_EVENT_GROUP_TOPIC ? event->data.group_topic : nullptr;

}

Tox_Event_Group_Topic *tox_event_group_topic_new(const Memory *mem)

{

    Tox_Event_Group_Topic *const group_topic =

        (Tox_Event_Group_Topic *)mem_alloc(mem, sizeof(Tox_Event_Group_Topic));

    if (group_topic == nullptr) {

        return nullptr;

    }

    tox_event_group_topic_construct(group_topic);

    return group_topic;

}

void tox_event_group_topic_free(Tox_Event_Group_Topic *group_topic, const Memory *mem)

{

    if (group_topic != nullptr) {

        tox_event_group_topic_destruct(group_topic, mem);

    }

    mem_delete(mem, group_topic);

}

static Tox_Event_Group_Topic *_Nullable tox_events_add_group_topic(Tox_Events *_Nonnull events, const Memory *_Nonnull mem)

{

    Tox_Event_Group_Topic *const group_topic = tox_event_group_topic_new(mem);

    if (group_topic == nullptr) {

        return nullptr;

    }

    Tox_Event event;

    event.type = TOX_EVENT_GROUP_TOPIC;

    event.data.group_topic = group_topic;

    if (!tox_events_add(events, &event)) {

        tox_event_group_topic_free(group_topic, mem);

        return nullptr;

    }

    return group_topic;

}

bool tox_event_group_topic_unpack(

    Tox_Event_Group_Topic **event, Bin_Unpack *bu, const Memory *mem)

{

    assert(event != nullptr);

    assert(*event == nullptr);

    *event = tox_event_group_topic_new(mem);

    if (*event == nullptr) {

        return false;

    }

    return tox_event_group_topic_unpack_into(*event, bu);

}

static Tox_Event_Group_Topic *_Nullable tox_event_group_topic_alloc(Tox_Events_State *_Nonnull state)

{

    if (state->events == nullptr) {

        return nullptr;

    }

    Tox_Event_Group_Topic *group_topic = tox_events_add_group_topic(state->events, state->mem);

    if (group_topic == nullptr) {

        state->error = TOX_ERR_EVENTS_ITERATE_MALLOC;

        return nullptr;

    }

    return group_topic;

}

/*****************************************************

 *

 * :: event handler

 *

 *****************************************************/

void tox_events_handle_group_topic(

    Tox *_Nonnull tox,

    uint32_t group_number,

    uint32_t peer_id,

    const uint8_t *_Nullable topic, size_t topic_length,

    void *_Nullable user_data)

{

    Tox_Events_State *state = tox_events_alloc(user_data);

    Tox_Event_Group_Topic *group_topic = tox_event_group_topic_alloc(state);

    if (group_topic == nullptr) {

        return;

    }

    tox_event_group_topic_set_group_number(group_topic, group_number);

    tox_event_group_topic_set_peer_id(group_topic, peer_id);

    if (!tox_event_group_topic_set_topic(group_topic, state->mem, topic, topic_length)) {

        tox_event_group_topic_free(group_topic, state->mem);

        state->error = TOX_ERR_EVENTS_ITERATE_MALLOC;

        return;

    }

}

void tox_events_handle_group_topic_dispatch(Tox *tox, const Tox_Event_Group_Topic *event, void *user_data)

{

    if (tox->group_topic_callback == nullptr) {

        return;

    }

    tox_unlock(tox);

    tox->group_topic_callback(tox, event->group_number, event->peer_id, event->topic, event->topic_length, user_data);

    tox_lock(tox);

}