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


using namespace std;
const size_t SCREEN_WIDTH = 80;
const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;

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];

    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)
{
    size_t data_size = item_size * item_count;
    stringstream* buffer = reinterpret_cast<stringstream*>(ctx); //смена типа
    auto text = reinterpret_cast<const char*>(items);
    buffer->write(text, data_size);
    return data_size;
}

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

    curl_global_init(CURL_GLOBAL_ALL);
    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);

        if (verbose){
            curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
        }

        res = curl_easy_perform(curl);
        if(res != CURLE_OK){
            curl_easy_strerror(res);
            exit(1);
        }
        curl_easy_cleanup(curl);
    }
    return input_data(buffer, false);
}


int main(int argc, char* argv[])
{
    bool verbose = false;
    string url;

    for (int i = 1; i < argc; ++i) {
        string arg = argv[i];
        if (arg == "-verbose") {
            verbose = true;
        } else if (arg.find("http://") == 0 || arg.find("https://") == 0) {
            url = arg;
        } else {
            cerr << "Invalid argument: " << arg << endl;
            cerr << "Usage: " << argv[0] << " [-verbose] [URL]" << endl;
            return 1;
        }
    }

    Input input;

    if (!url.empty()) {
        input = download(url, verbose);
    } else {
        input = input_data(cin, true);
    }

    auto bins = make_histogram(input.numbers, input.bin_count);
    // show_histogram_svg_vertical(bins);
    show_histogram_svg(bins);

}