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

 * Copyright © 2023-2025 The TokTok team.

 */

#include "events_alloc.h"

#include <assert.h>

#include <stdlib.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"

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

 *

 * :: struct and accessors

 *

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

struct Tox_Event_File_Recv_Chunk {

    uint32_t friend_number;

    uint32_t file_number;

    uint64_t position;

    uint8_t *data;

    uint32_t data_length;

};

static void tox_event_file_recv_chunk_set_friend_number(Tox_Event_File_Recv_Chunk *_Nonnull file_recv_chunk, uint32_t friend_number)

{

    assert(file_recv_chunk != nullptr);

    file_recv_chunk->friend_number = friend_number;

}

uint32_t tox_event_file_recv_chunk_get_friend_number(const Tox_Event_File_Recv_Chunk *file_recv_chunk)

{

    assert(file_recv_chunk != nullptr);

    return file_recv_chunk->friend_number;

}

static void tox_event_file_recv_chunk_set_file_number(Tox_Event_File_Recv_Chunk *_Nonnull file_recv_chunk, uint32_t file_number)

{

    assert(file_recv_chunk != nullptr);

    file_recv_chunk->file_number = file_number;

}

uint32_t tox_event_file_recv_chunk_get_file_number(const Tox_Event_File_Recv_Chunk *file_recv_chunk)

{

    assert(file_recv_chunk != nullptr);

    return file_recv_chunk->file_number;

}

static void tox_event_file_recv_chunk_set_position(Tox_Event_File_Recv_Chunk *_Nonnull file_recv_chunk, uint64_t position)

{

    assert(file_recv_chunk != nullptr);

    file_recv_chunk->position = position;

}

uint64_t tox_event_file_recv_chunk_get_position(const Tox_Event_File_Recv_Chunk *file_recv_chunk)

{

    assert(file_recv_chunk != nullptr);

    return file_recv_chunk->position;

}

static bool tox_event_file_recv_chunk_set_data(Tox_Event_File_Recv_Chunk *_Nonnull file_recv_chunk,

        const uint8_t *_Nullable data, uint32_t data_length)

{

    assert(file_recv_chunk != nullptr);

    if (file_recv_chunk->data != nullptr) {

        free(file_recv_chunk->data);

        file_recv_chunk->data = nullptr;

        file_recv_chunk->data_length = 0;

    }

    if (data == nullptr) {

        assert(data_length == 0);

        return true;

    }

    uint8_t *data_copy = (uint8_t *)malloc(data_length);

    if (data_copy == nullptr) {

        return false;

    }

    memcpy(data_copy, data, data_length);

    file_recv_chunk->data = data_copy;

    file_recv_chunk->data_length = data_length;

    return true;

}

uint32_t tox_event_file_recv_chunk_get_data_length(const Tox_Event_File_Recv_Chunk *file_recv_chunk)

{

    assert(file_recv_chunk != nullptr);

    return file_recv_chunk->data_length;

}

const uint8_t *tox_event_file_recv_chunk_get_data(const Tox_Event_File_Recv_Chunk *file_recv_chunk)

{

    assert(file_recv_chunk != nullptr);

    return file_recv_chunk->data;

}

static void tox_event_file_recv_chunk_construct(Tox_Event_File_Recv_Chunk *_Nonnull file_recv_chunk)

{

    *file_recv_chunk = (Tox_Event_File_Recv_Chunk) {

        0

    };

}

static void tox_event_file_recv_chunk_destruct(Tox_Event_File_Recv_Chunk *_Nonnull file_recv_chunk, const Memory *_Nonnull mem)

{

    free(file_recv_chunk->data);

}

bool tox_event_file_recv_chunk_pack(

    const Tox_Event_File_Recv_Chunk *event, Bin_Pack *bp)

{

    return bin_pack_array(bp, 4)

           && bin_pack_u32(bp, event->friend_number)

           && bin_pack_u32(bp, event->file_number)

           && bin_pack_u64(bp, event->position)

           && bin_pack_bin(bp, event->data, event->data_length);

}

static bool tox_event_file_recv_chunk_unpack_into(Tox_Event_File_Recv_Chunk *_Nonnull event, Bin_Unpack *_Nonnull bu)

{

    assert(event != nullptr);

    if (!bin_unpack_array_fixed(bu, 4, nullptr)) {

        return false;

    }

    return bin_unpack_u32(bu, &event->friend_number)

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

           && bin_unpack_u64(bu, &event->position)

           && bin_unpack_bin(bu, &event->data, &event->data_length);

}

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

 *

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

 *

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

const Tox_Event_File_Recv_Chunk *tox_event_get_file_recv_chunk(const Tox_Event *event)

{

    return event->type == TOX_EVENT_FILE_RECV_CHUNK ? event->data.file_recv_chunk : nullptr;

}

Tox_Event_File_Recv_Chunk *tox_event_file_recv_chunk_new(const Memory *mem)

{

    Tox_Event_File_Recv_Chunk *const file_recv_chunk =

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

    if (file_recv_chunk == nullptr) {

        return nullptr;

    }

    tox_event_file_recv_chunk_construct(file_recv_chunk);

    return file_recv_chunk;

}

void tox_event_file_recv_chunk_free(Tox_Event_File_Recv_Chunk *file_recv_chunk, const Memory *mem)

{

    if (file_recv_chunk != nullptr) {

        tox_event_file_recv_chunk_destruct(file_recv_chunk, mem);

    }

    mem_delete(mem, file_recv_chunk);

}

static Tox_Event_File_Recv_Chunk *tox_events_add_file_recv_chunk(Tox_Events *_Nonnull events, const Memory *_Nonnull mem)

{

    Tox_Event_File_Recv_Chunk *const file_recv_chunk = tox_event_file_recv_chunk_new(mem);

    if (file_recv_chunk == nullptr) {

        return nullptr;

    }

    Tox_Event event;

    event.type = TOX_EVENT_FILE_RECV_CHUNK;

    event.data.file_recv_chunk = file_recv_chunk;

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

        tox_event_file_recv_chunk_free(file_recv_chunk, mem);

        return nullptr;

    }

    return file_recv_chunk;

}

bool tox_event_file_recv_chunk_unpack(

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

{

    assert(event != nullptr);

    assert(*event == nullptr);

    *event = tox_event_file_recv_chunk_new(mem);

    if (*event == nullptr) {

        return false;

    }

    return tox_event_file_recv_chunk_unpack_into(*event, bu);

}

static Tox_Event_File_Recv_Chunk *tox_event_file_recv_chunk_alloc(void *_Nonnull user_data)

{

    Tox_Events_State *state = tox_events_alloc(user_data);

    assert(state != nullptr);

    if (state->events == nullptr) {

        return nullptr;

    }

    Tox_Event_File_Recv_Chunk *file_recv_chunk = tox_events_add_file_recv_chunk(state->events, state->mem);

    if (file_recv_chunk == nullptr) {

        state->error = TOX_ERR_EVENTS_ITERATE_MALLOC;

        return nullptr;

    }

    return file_recv_chunk;

}

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

 *

 * :: event handler

 *

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

void tox_events_handle_file_recv_chunk(

    Tox *tox, uint32_t friend_number, uint32_t file_number, uint64_t position, const uint8_t *data, size_t length,

    void *user_data)

{

    Tox_Event_File_Recv_Chunk *file_recv_chunk = tox_event_file_recv_chunk_alloc(user_data);

    if (file_recv_chunk == nullptr) {

        return;

    }

    tox_event_file_recv_chunk_set_friend_number(file_recv_chunk, friend_number);

    tox_event_file_recv_chunk_set_file_number(file_recv_chunk, file_number);

    tox_event_file_recv_chunk_set_position(file_recv_chunk, position);

    tox_event_file_recv_chunk_set_data(file_recv_chunk, data, length);

}