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

 * Copyright © 2023-2024 The TokTok team.

 */

#include "events_alloc.h"

#include <assert.h>

#include <stdlib.h>

#include <string.h>

#include "../bin_pack.h"

#include "../bin_unpack.h"

#include "../ccompat.h"

#include "../mem.h"

#include "../tox.h"

#include "../tox_events.h"

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

 *

 * :: struct and accessors

 *

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

struct Tox_Event_Group_Password {

    uint32_t group_number;

    uint8_t *password;

    uint32_t password_length;

};

non_null()

static void tox_event_group_password_set_group_number(Tox_Event_Group_Password *group_password,

        uint32_t group_number)

{

    assert(group_password != nullptr);

    group_password->group_number = group_number;

}

uint32_t tox_event_group_password_get_group_number(const Tox_Event_Group_Password *group_password)

{

    assert(group_password != nullptr);

    return group_password->group_number;

}

non_null(1) nullable(2)

static bool tox_event_group_password_set_password(Tox_Event_Group_Password *group_password,

        const uint8_t *password, uint32_t password_length)

{

    assert(group_password != nullptr);

    if (group_password->password != nullptr) {

        free(group_password->password);

        group_password->password = nullptr;

        group_password->password_length = 0;

    }

    if (password == nullptr) {

        assert(password_length == 0);

        return true;

    }

    uint8_t *password_copy = (uint8_t *)malloc(password_length);

    if (password_copy == nullptr) {

        return false;

    }

    memcpy(password_copy, password, password_length);

    group_password->password = password_copy;

    group_password->password_length = password_length;

    return true;

}

uint32_t tox_event_group_password_get_password_length(const Tox_Event_Group_Password *group_password)

{

    assert(group_password != nullptr);

    return group_password->password_length;

}

const uint8_t *tox_event_group_password_get_password(const Tox_Event_Group_Password *group_password)

{

    assert(group_password != nullptr);

    return group_password->password;

}

non_null()

static void tox_event_group_password_construct(Tox_Event_Group_Password *group_password)

{

    *group_password = (Tox_Event_Group_Password) {

        0

    };

}

non_null()

static void tox_event_group_password_destruct(Tox_Event_Group_Password *group_password, const Memory *mem)

{

    free(group_password->password);

}

bool tox_event_group_password_pack(

    const Tox_Event_Group_Password *event, Bin_Pack *bp)

{

    return bin_pack_array(bp, 2)

           && bin_pack_u32(bp, event->group_number)

           && bin_pack_bin(bp, event->password, event->password_length);

}

non_null()

static bool tox_event_group_password_unpack_into(

    Tox_Event_Group_Password *event, Bin_Unpack *bu)

{

    assert(event != nullptr);

    if (!bin_unpack_array_fixed(bu, 2, nullptr)) {

        return false;

    }

    return bin_unpack_u32(bu, &event->group_number)

           && bin_unpack_bin(bu, &event->password, &event->password_length);

}

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

 *

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

 *

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

const Tox_Event_Group_Password *tox_event_get_group_password(const Tox_Event *event)

{

    return event->type == TOX_EVENT_GROUP_PASSWORD ? event->data.group_password : nullptr;

}

Tox_Event_Group_Password *tox_event_group_password_new(const Memory *mem)

{

    Tox_Event_Group_Password *const group_password =

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

    if (group_password == nullptr) {

        return nullptr;

    }

    tox_event_group_password_construct(group_password);

    return group_password;

}

void tox_event_group_password_free(Tox_Event_Group_Password *group_password, const Memory *mem)

{

    if (group_password != nullptr) {

        tox_event_group_password_destruct(group_password, mem);

    }

    mem_delete(mem, group_password);

}

non_null()

static Tox_Event_Group_Password *tox_events_add_group_password(Tox_Events *events, const Memory *mem)

{

    Tox_Event_Group_Password *const group_password = tox_event_group_password_new(mem);

    if (group_password == nullptr) {

        return nullptr;

    }

    Tox_Event event;

    event.type = TOX_EVENT_GROUP_PASSWORD;

    event.data.group_password = group_password;

    tox_events_add(events, &event);

    return group_password;

}

bool tox_event_group_password_unpack(

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

{

    assert(event != nullptr);

    assert(*event == nullptr);

    *event = tox_event_group_password_new(mem);

    if (*event == nullptr) {

        return false;

    }

    return tox_event_group_password_unpack_into(*event, bu);

}

non_null()

static Tox_Event_Group_Password *tox_event_group_password_alloc(void *user_data)

{

    Tox_Events_State *state = tox_events_alloc(user_data);

    assert(state != nullptr);

    if (state->events == nullptr) {

        return nullptr;

    }

    Tox_Event_Group_Password *group_password = tox_events_add_group_password(state->events, state->mem);

    if (group_password == nullptr) {

        state->error = TOX_ERR_EVENTS_ITERATE_MALLOC;

        return nullptr;

    }

    return group_password;

}

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

 *

 * :: event handler

 *

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

void tox_events_handle_group_password(Tox *tox, uint32_t group_number, const uint8_t *password, size_t length,

        void *user_data)

{

    Tox_Event_Group_Password *group_password = tox_event_group_password_alloc(user_data);

    if (group_password == nullptr) {

        return;

    }

    tox_event_group_password_set_group_number(group_password, group_number);

    tox_event_group_password_set_password(group_password, password, length);

}