#include <curl/curl.h>

using namespace std;
#include "histogram.h"
#include "text.h"
#include "svg.h"
#include <sstream>
#include <string>

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

Input input_data(istream& in, bool promt);
Input download(const string& address);

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



    std::vector<size_t> bins = make_histogram(input.numbers, input.bin_count);
    show_histogram_svg(bins);


    return 0;
}
Input
download(const string& address) {
    stringstream buffer;
    CURL* curl = curl_easy_init();
    if(curl) {
        CURLcode res;
        curl_easy_setopt(curl, CURLOPT_URL, address);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, input_data);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
        res = curl_easy_perform(curl);
        if(res!=0){
            cout << curl_easy_strerror(res) << endl;
            exit(1);
        }
        curl_easy_cleanup(curl);
    }
    return input_data(buffer, false);
}

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<char*>(items), data_size);
    return data_size;
}

Input input_data(istream& in, bool promt) {

    Input input_struct;
    size_t countOfNumbers;
    if(promt){cerr << "Input your count of numbers:\n";}

    in >> countOfNumbers;

    input_struct.numbers.resize(countOfNumbers);
    if(promt){cerr << "Input numbers:\n";}
    for (int i = 0; i < countOfNumbers; i++) {
        if(promt){cerr << i << ":" << endl;}
        in >> input_struct.numbers[i];
    }
    if(promt){
        cerr << endl;
        cerr << "Input bin count:\n";
    }

    in >> input_struct.bin_count;



    return input_struct;
}