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

using namespace std;

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

Input input_data(istream& stream, bool prompt) {


    size_t number_count;
    if (prompt) {
        cerr << "Enter number count: ";
    }
    stream >> number_count;

    Input in;

    in.numbers.resize(number_count);

    if (prompt){
            cerr << "Enter numbers: ";
    }
    for (size_t i = 0; i < number_count; i++)
    {
        stream >> in.numbers[i];
    }

    if (prompt){
    cerr << "Enter number of bins: ";
    }
        stream >> in.bin_count;

    return in;
}

size_t write_data(void* items, size_t item_size, size_t item_count, void* ctx) { // размер принятых данных в байтах, иначе curl_easy_perform() остановит работу с ошибкой.
    size_t data_size = item_size * item_count;
    stringstream* buffer = reinterpret_cast<stringstream*>(ctx); // stringstream — поток, который может читать из буфера в памяти.
    auto text = reinterpret_cast<const char*>(items);
    buffer->write(text, data_size);
    return data_size;
}

Input download(const string& address) {
    stringstream buffer;
    CURL *curl = curl_easy_init();
    if(curl) {
        CURLcode res;
        double connect_time;

        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 (!curl_easy_getinfo(curl, CURLINFO_CONNECT_TIME, &connect_time)) {
            cerr << "Connect time: " << connect_time << " seconds." << endl;
        } else {
            cerr << "Failed to retrieve connect time." << endl;
        }


        if (res != CURLE_OK) {
            cerr << "CURL error: " << curl_easy_strerror(res) << endl;
            curl_easy_cleanup(curl);
            exit(1);
        }

        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 bins = make_histogram(in.numbers, in.bin_count);

    show_histogram_svg(bins);


    }