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

 * Copyright © 2022-2024 The TokTok team.

 */

#include "tox_events.h"

#include <assert.h>

#include <string.h>

#include "bin_pack.h"

#include "bin_unpack.h"

#include "ccompat.h"

#include "events/events_alloc.h"

#include "logger.h"

#include "mem.h"

#include "tox.h"

#include "tox_event.h"

#include "tox_private.h"

#include "tox_struct.h"

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

 *

 * :: Set up event handlers.

 *

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

void tox_events_init(Tox *tox)

{

    tox_callback_conference_connected(tox, tox_events_handle_conference_connected);

    tox_callback_conference_invite(tox, tox_events_handle_conference_invite);

    tox_callback_conference_message(tox, tox_events_handle_conference_message);

    tox_callback_conference_peer_list_changed(tox, tox_events_handle_conference_peer_list_changed);

    tox_callback_conference_peer_name(tox, tox_events_handle_conference_peer_name);

    tox_callback_conference_title(tox, tox_events_handle_conference_title);

    tox_callback_file_chunk_request(tox, tox_events_handle_file_chunk_request);

    tox_callback_file_recv_chunk(tox, tox_events_handle_file_recv_chunk);

    tox_callback_file_recv_control(tox, tox_events_handle_file_recv_control);

    tox_callback_file_recv(tox, tox_events_handle_file_recv);

    tox_callback_friend_connection_status(tox, tox_events_handle_friend_connection_status);

    tox_callback_friend_lossless_packet(tox, tox_events_handle_friend_lossless_packet);

    tox_callback_friend_lossy_packet(tox, tox_events_handle_friend_lossy_packet);

    tox_callback_friend_message(tox, tox_events_handle_friend_message);

    tox_callback_friend_name(tox, tox_events_handle_friend_name);

    tox_callback_friend_read_receipt(tox, tox_events_handle_friend_read_receipt);

    tox_callback_friend_request(tox, tox_events_handle_friend_request);

    tox_callback_friend_status_message(tox, tox_events_handle_friend_status_message);

    tox_callback_friend_status(tox, tox_events_handle_friend_status);

    tox_callback_friend_typing(tox, tox_events_handle_friend_typing);

    tox_callback_self_connection_status(tox, tox_events_handle_self_connection_status);

    tox_callback_group_peer_name(tox, tox_events_handle_group_peer_name);

    tox_callback_group_peer_status(tox, tox_events_handle_group_peer_status);

    tox_callback_group_topic(tox, tox_events_handle_group_topic);

    tox_callback_group_privacy_state(tox, tox_events_handle_group_privacy_state);

    tox_callback_group_voice_state(tox, tox_events_handle_group_voice_state);

    tox_callback_group_topic_lock(tox, tox_events_handle_group_topic_lock);

    tox_callback_group_peer_limit(tox, tox_events_handle_group_peer_limit);

    tox_callback_group_password(tox, tox_events_handle_group_password);

    tox_callback_group_message(tox, tox_events_handle_group_message);

    tox_callback_group_private_message(tox, tox_events_handle_group_private_message);

    tox_callback_group_custom_packet(tox, tox_events_handle_group_custom_packet);

    tox_callback_group_custom_private_packet(tox, tox_events_handle_group_custom_private_packet);

    tox_callback_group_invite(tox, tox_events_handle_group_invite);

    tox_callback_group_peer_join(tox, tox_events_handle_group_peer_join);

    tox_callback_group_peer_exit(tox, tox_events_handle_group_peer_exit);

    tox_callback_group_self_join(tox, tox_events_handle_group_self_join);

    tox_callback_group_join_fail(tox, tox_events_handle_group_join_fail);

    tox_callback_group_moderation(tox, tox_events_handle_group_moderation);

    tox_callback_dht_get_nodes_response(tox, tox_events_handle_dht_get_nodes_response);

}

uint32_t tox_events_get_size(const Tox_Events *events)

{

    return events == nullptr ? 0 : events->events_size;

}

nullable(1)

static const Tox_Event *tox_events_get_events(const Tox_Events *events)

{

    return events == nullptr ? nullptr : events->events;

}

const Tox_Event *tox_events_get(const Tox_Events *events, uint32_t index)

{

    if (index >= tox_events_get_size(events)) {

        return nullptr;

    }

    return &events->events[index];

}

Tox_Events *tox_events_iterate(Tox *tox, bool fail_hard, Tox_Err_Events_Iterate *error)

{

    const Tox_System *sys = tox_get_system(tox);

    Tox_Events_State state = {TOX_ERR_EVENTS_ITERATE_OK, sys->mem};

    tox_iterate(tox, &state);

    if (error != nullptr) {

        *error = state.error;

    }

    if (fail_hard && state.error != TOX_ERR_EVENTS_ITERATE_OK) {

        tox_events_free(state.events);

        return nullptr;

    }

    return state.events;

}

non_null()

static bool tox_event_pack_handler(const void *arr, uint32_t index, const Logger *logger, Bin_Pack *bp)

{

    const Tox_Event *events = (const Tox_Event *)arr;

    assert(events != nullptr);

    return tox_event_pack(&events[index], bp);

}

non_null(3) nullable(1, 2)

static bool tox_events_pack_handler(const void *obj, const Logger *logger, Bin_Pack *bp)

{

    const Tox_Events *events = (const Tox_Events *)obj;

    return bin_pack_obj_array(bp, tox_event_pack_handler, tox_events_get_events(events), tox_events_get_size(events), logger);

}

uint32_t tox_events_bytes_size(const Tox_Events *events)

{

    return bin_pack_obj_size(tox_events_pack_handler, events, nullptr);

}

bool tox_events_get_bytes(const Tox_Events *events, uint8_t *bytes)

{

    return bin_pack_obj(tox_events_pack_handler, events, nullptr, bytes, UINT32_MAX);

}

non_null()

static bool tox_events_unpack_handler(void *obj, Bin_Unpack *bu)

{

    Tox_Events *events = (Tox_Events *)obj;

    uint32_t size;

    if (!bin_unpack_array(bu, &size)) {

        return false;

    }

    for (uint32_t i = 0; i < size; ++i) {

        Tox_Event event = {TOX_EVENT_INVALID};

        if (!tox_event_unpack_into(&event, bu, events->mem)) {

            tox_event_destruct(&event, events->mem);

            return false;

        }

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

            tox_event_destruct(&event, events->mem);

            return false;

        }

    }

    // Invariant: if all adds worked, the events size must be the input array size.

    assert(tox_events_get_size(events) == size);

    return true;

}

Tox_Events *tox_events_load(const Tox_System *sys, const uint8_t *bytes, uint32_t bytes_size)

{

    Tox_Events *events = (Tox_Events *)mem_alloc(sys->mem, sizeof(Tox_Events));

    if (events == nullptr) {

        return nullptr;

    }

    *events = (Tox_Events) {

        nullptr

    };

    events->mem = sys->mem;

    if (!bin_unpack_obj(tox_events_unpack_handler, events, bytes, bytes_size)) {

        tox_events_free(events);

        return nullptr;

    }

    return events;

}

bool tox_events_equal(const Tox_System *sys, const Tox_Events *a, const Tox_Events *b)

{

    assert(sys != nullptr);

    assert(sys->mem != nullptr);

    const uint32_t a_size = tox_events_bytes_size(a);

    const uint32_t b_size = tox_events_bytes_size(b);

    if (a_size != b_size) {

        return false;

    }

    uint8_t *a_bytes = (uint8_t *)mem_balloc(sys->mem, a_size);

    uint8_t *b_bytes = (uint8_t *)mem_balloc(sys->mem, b_size);

    if (a_bytes == nullptr || b_bytes == nullptr) {

        mem_delete(sys->mem, b_bytes);

        mem_delete(sys->mem, a_bytes);

        return false;

    }

    tox_events_get_bytes(a, a_bytes);

    tox_events_get_bytes(b, b_bytes);

    const bool ret = memcmp(a_bytes, b_bytes, a_size) == 0;

    mem_delete(sys->mem, b_bytes);

    mem_delete(sys->mem, a_bytes);

    return ret;

}