#include <sstream>
#include <string>
#include <curl/curl.h>
#include <iostream>
#include <vector>
#include <cmath>
#include "histogram.h"
#include "svg.h"

using namespace std;

struct Input
{
    vector<double> numbers;
    size_t bin_count{};
};

size_t
write_data(void* items, size_t item_size, size_t item_count, void* ctx)
{
    size_t data_size = item_size * item_count;

    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
    buffer->write(reinterpret_cast<const char*>(items), data_size);

    return data_size;
}

Input
input_data(istream& in, bool prompt)
{
    if(prompt)
        cerr << "vvedite col-vo nomerov:";
    size_t number_count;
    in >> number_count;
    Input rez;

    if(prompt)
        cerr << "vvedite nomera:";
    rez.numbers.resize(number_count);
    for (size_t i = 0; i < number_count; i++)
    {
        in >> rez.numbers[i];
    }
    if(prompt)
        cerr << "vvedite col-vo corzin:";
    in >> rez.bin_count;
    return rez;
}

Input
download(const string& address) {
    stringstream buffer;

    CURL* curl = curl_easy_init();
    if(curl)
    {
        CURLcode res;
        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
        res = curl_easy_perform(curl);
        if (res != 0)
            {
            cout << curl_easy_strerror(res);
            exit(1);
            }
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, &buffer);

        curl_easy_cleanup(curl);
    }
    return input_data(buffer, false);
}

int
main(int argc, char* argv[])
{
    Input input;
    if (argc > 1) {
        input = download(argv[1]);
    } else {
        input = input_data(cin, true);
    }

    curl_global_init(CURL_GLOBAL_ALL);
    bool prompt = false;
    auto in = input_data(cin, prompt);
    const auto bins = make_histogram(in.numbers, in.bin_count);
    show_histogram_svg(bins);
    //show_histogram_text(bins, in.numbers, in.bin_count);
}