#include <iostream>
#include <fstream>
#include <string>
#include <unordered_map>
#include <vector>
#include <cstring>
#include <cassert>
using namespace std;

struct index_data {
    vector <string> file_names;
    vector <long long> start_reading_positions;
    vector <long long> end_reading_positions;
    int data_size;
    bool deleted;
};

unordered_map <int,index_data> indexes;

void write_function(void* data, size_t &current_data_size, FILE* data_file) {
    fwrite(data, 1, current_data_size, data_file);
}

bool write_map_to_file(int id) {
    FILE* data_file;
    string current_file = "/home/twite/CLionProjects/Test/map.txt";
    int last_written_byte_position = 0;
    data_file = fopen(current_file.c_str(), "a+b");
    size_t current_data_size = 0;
    for (const auto &i : indexes[id].file_names) {
        current_data_size += i.size();
    }
    write_function(static_cast<void*>(indexes[id].file_names.data()), current_data_size, data_file);
    current_data_size = sizeof(long long) * indexes[id].start_reading_positions.size();
    write_function(static_cast<void*>(indexes[id].start_reading_positions.data()), current_data_size, data_file);
    current_data_size = sizeof(long long) * indexes[id].end_reading_positions.size();
    write_function(static_cast<void*>(indexes[id].end_reading_positions.data()), current_data_size, data_file);
    current_data_size = sizeof(int);
    write_function(static_cast<void*>(&indexes[id].data_size), current_data_size, data_file);
    current_data_size = sizeof(bool);
    write_function(static_cast<void*>(&indexes[id].deleted), current_data_size, data_file);
    fclose(data_file);
    return true;
}

bool load_map_from_file() {
    FILE *data_file;

    return true;
}

int main() {
    indexes[1].file_names.push_back("test.txt");
    indexes[1].start_reading_positions.push_back(0);
    indexes[1].end_reading_positions.push_back(10);
    indexes[1].data_size = 10;
    indexes[1].deleted = false;
    assert(write_map_to_file(1) == true);
    indexes[1].file_names;
    assert(load_map_from_file(1) == true);
    //load_map_from_file();
    return 0;
}