#include <sstream>
#include <string>
#include <curl/curl.h>
#include "text.h"
#include "histogram.h"
#include "svg.h"
#include "histogram_internal.h"
#include <iostream>
#include <vector>
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 pro)
{
    if (pro)
        cerr << "enter the number of numbers:";
    size_t number_count;
    in >> number_count;
    Input k;
    if (pro)
        cerr << "enter the numbers:";
    k.numbers.resize(number_count);
    for (size_t i = 0; i < number_count; i++)
        in >> k.numbers[i];
    if (pro)
        cerr << "enter the number of buckets:";
    in >> k.bin_count;
    return k;
}
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());
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
        res = curl_easy_perform(curl);
        if (res != 0) {
            cout << curl_easy_strerror(res);
            exit(1);
        }
        curl_off_t speed;
        res = curl_easy_getinfo(curl, CURLINFO_SPEED_DOWNLOAD_T, &speed);
        if (!res) {
            fprintf(stderr, "Download speed %" CURL_FORMAT_CURL_OFF_T " bytes/sec\n", speed);
        }
        
        curl_easy_cleanup(curl);
    }

    return input_data(buffer, false);
}
int
main(int argc, char* argv[]) {
    Input in;
    if (argc > 1) {
        in = download(argv[1]);
    }
    else {
        in = input_data(cin, true);
    }
    auto ch = make_histogram(in.numbers, in.bin_count);
    show_histogram_svg(ch);
}