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

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

Input
input_data(istream& in, bool prompt) {

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

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

    if (prompt) {
        cerr << "Enter bin count: ";
    }
    in >> iinn.bin_count;

    return iinn;
}

static 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
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 != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
            exit(1);
        }
        curl_easy_cleanup(curl);
    }
    return input_data(buffer, false);
}

void usage() {
    cout << "Usage: (lab34.exe [-format {text|svg}] URL) or (lab34.exe URL [-format {text|svg}])\n" ;
    exit(1);
}
int
main(int argc, char* argv[])
{
#include <curl/curl.h>
    
    curl_global_init(CURL_GLOBAL_ALL);
    Input input;
    string format_option;
    if ((argc > 3) && (strcmp(argv[1], "-format") == 0))
    {
        if (strcmp(argv[2], "svg") == 0) {
            format_option = "svg";
        } 
        else if (strcmp(argv[2], "text") == 0) {
            format_option = "text";
        }
       
        input = download(argv[3]);
    }
    
    else if ((argc > 3) && (strcmp(argv[2], "-format") == 0))
    {
        if (strcmp(argv[3], "svg") == 0) {
            format_option = "svg";
        }
        else if (strcmp(argv[3], "text") == 0) {
            format_option = "text";
        }
        input = download(argv[1]);
    }
    else {
        usage();

    }
    if (format_option != "text" && format_option != "svg") {
        usage();
    }

    const auto bins = make_histogram(input.numbers, input.bin_count);

    if (format_option == "text") {
        show_histogram_text(bins, input.bin_count);
          }
    else if (format_option == "svg") {
        show_histogram_svg(bins);
    }
    return(0);
}