#include "framework/framework.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#define AVATAR_SIZE 100

static const uint8_t avatar_data[AVATAR_SIZE] = "This is a fake avatar image data. It should be longer but for testing this is enough.";

typedef struct {

    uint8_t avatar_hash[TOX_HASH_LENGTH];

    bool transfer_finished;

} AvatarState;

static void on_file_chunk_request(const Tox_Event_File_Chunk_Request *event, void *user_data)

{

    ToxNode *self = (ToxNode *)user_data;

    AvatarState *state = (AvatarState *)tox_node_get_script_ctx(self);

    uint32_t friend_number = tox_event_file_chunk_request_get_friend_number(event);

    uint32_t file_number = tox_event_file_chunk_request_get_file_number(event);

    uint64_t position = tox_event_file_chunk_request_get_position(event);

    size_t length = tox_event_file_chunk_request_get_length(event);

    if (length == 0) {

        state->transfer_finished = true;

        return;

    }

    if (position >= AVATAR_SIZE) {

        tox_file_send_chunk(tox_node_get_tox(self), friend_number, file_number, position, nullptr, 0, nullptr);

        state->transfer_finished = true;

        return;

    }

    size_t to_send = AVATAR_SIZE - (size_t)position;

    if (to_send > length) {

        to_send = length;

    }

    tox_file_send_chunk(tox_node_get_tox(self), friend_number, file_number, position, avatar_data + position, to_send, nullptr);

}

static void alice_script(ToxNode *self, void *ctx)

{

    AvatarState *state = (AvatarState *)ctx;

    tox_events_callback_file_chunk_request(tox_node_get_dispatch(self), on_file_chunk_request);

    tox_node_wait_for_self_connected(self);

    tox_node_wait_for_friend_connected(self, 0);

    Tox *tox = tox_node_get_tox(self);

    tox_hash(state->avatar_hash, avatar_data, AVATAR_SIZE);

    tox_node_log(self, "Sending avatar request to Bob...");

    Tox_Err_File_Send err_send;

    tox_file_send(tox, 0, TOX_FILE_KIND_AVATAR, AVATAR_SIZE, state->avatar_hash, (const uint8_t *)"avatar.png", 10, &err_send);

    ck_assert(err_send == TOX_ERR_FILE_SEND_OK);

    WAIT_UNTIL(state->transfer_finished);

    tox_node_log(self, "Avatar transfer finished from Alice side.");

}

typedef struct {

    bool avatar_received;

    uint8_t received_data[AVATAR_SIZE];

    size_t received_len;

} BobState;

static void on_file_recv(const Tox_Event_File_Recv *event, void *user_data)

{

    ToxNode *self = (ToxNode *)user_data;

    uint32_t kind = tox_event_file_recv_get_kind(event);

    uint32_t friend_number = tox_event_file_recv_get_friend_number(event);

    uint32_t file_number = tox_event_file_recv_get_file_number(event);

    if (kind == TOX_FILE_KIND_AVATAR) {

        tox_node_log(self, "Receiving avatar from Alice, resuming...");

        tox_file_control(tox_node_get_tox(self), friend_number, file_number, TOX_FILE_CONTROL_RESUME, nullptr);

    }

}

static void on_file_recv_chunk(const Tox_Event_File_Recv_Chunk *event, void *user_data)

{

    ToxNode *self = (ToxNode *)user_data;

    BobState *state = (BobState *)tox_node_get_script_ctx(self);

    size_t length = tox_event_file_recv_chunk_get_data_length(event);

    uint64_t position = tox_event_file_recv_chunk_get_position(event);

    if (length == 0) {

        state->avatar_received = true;

        return;

    }

    if (position + length <= AVATAR_SIZE) {

        memcpy(state->received_data + position, tox_event_file_recv_chunk_get_data(event), length);

        state->received_len += length;

    }

}

static void bob_script(ToxNode *self, void *ctx)

{

    const BobState *state = (const BobState *)ctx;

    tox_events_callback_file_recv(tox_node_get_dispatch(self), on_file_recv);

    tox_events_callback_file_recv_chunk(tox_node_get_dispatch(self), on_file_recv_chunk);

    tox_node_wait_for_self_connected(self);

    tox_node_wait_for_friend_connected(self, 0);

    WAIT_UNTIL(state->avatar_received);

    tox_node_log(self, "Avatar received. Verifying data...");

    ck_assert(state->received_len == AVATAR_SIZE);

    ck_assert(memcmp(state->received_data, avatar_data, AVATAR_SIZE) == 0);

    tox_node_log(self, "Avatar verification successful!");

}

int main(int argc, char *argv[])

{

    ToxScenario *s = tox_scenario_new(argc, argv, 60000);

    AvatarState alice_state = {{0}, false};

    BobState bob_state = {false, {0}, 0};

    tox_scenario_add_node(s, "Alice", alice_script, &alice_state, sizeof(AvatarState));

    tox_scenario_add_node(s, "Bob", bob_script, &bob_state, sizeof(BobState));

    ToxNode *alice = tox_scenario_get_node(s, 0);

    ToxNode *bob = tox_scenario_get_node(s, 1);

    tox_node_bootstrap(alice, bob);

    tox_node_friend_add(alice, bob);

    tox_node_friend_add(bob, alice);

    ToxScenarioStatus res = tox_scenario_run(s);

    if (res != TOX_SCENARIO_DONE) {

        fprintf(stderr, "Scenario failed with status %u\n", res);

        return 1;

    }

    tox_scenario_free(s);

    return 0;

}