#include <iostream>
#include <conio.h>
#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{};
    string fill="black";
};

Input input_data(istream& in_stream, bool prompt) {
    Input in;
    size_t number_count;
    if (prompt) {
        cerr << "Введите количество значений\n";
    }
    in_stream >> number_count;
    in.numbers.resize(number_count);
    if (prompt) {
        cerr << "Введите значения\n";
    }
    for (size_t i = 0; i < number_count; i++) {
        in_stream >> in.numbers[i];
    }
    if (prompt) {
        cerr << "Введите количество столбцов гистограммы\n";
    }
    in_stream >> in.bin_count;
    return in;
}

size_t write_data(void* items, size_t item_size, size_t item_count, void* ctx) {
    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
    const char* char_items = reinterpret_cast<const char*>(items);
    size_t data_size = item_size * item_count;
    buffer->write(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_WRITEFUNCTION, write_data);
        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
        res = curl_easy_perform(curl);
        if (res != 0) {
            cerr << curl_easy_strerror(res);
            exit(1);
        }
    }
    curl_easy_cleanup(curl);

    return input_data(buffer, false);
}

int main(int argc, char* argv[])
{
    Input input;
    bool input_created = false;
    if (argc == 2) {
        input = download(argv[1]);
        input_created = true;
    }
    if (argc > 2) {
        for (int i = 0; i < argc; i++) {
            if (strcmp(argv[i], "-fill") == 0) {
                if (argc < 4) {
                    cerr << "-fill must be followed by a color name or hex code";
                    exit(1);
                }
                else if (i == 3) {
                    cerr << "-fill must be followed by a color name or hex code";
                    exit(1);
                }
                else {
                    if (i == 2) {
                        input = download(argv[1]);
                    }
                    else {
                        input = download(argv[3]);
                    }
                    input.fill = argv[i + 1];
                    input_created = true;
                }
            }
        }
    }
    else {
        input = input_data(cin, true);
    }
    if (!input_created) {
        cerr << "invalid arguements";
        exit(1);
    }
    curl_global_init(CURL_GLOBAL_ALL);
    const size_t SCREEN_WIDTH = 80;
    const size_t MAX_ASTERISK = SCREEN_WIDTH - 3 - 1;
    vector<double> numbers_data = input.numbers;
    auto bins = make_histogram(input.numbers, input.bin_count);
    show_histogram_svg(bins, input.numbers, input.bin_count, input.fill);
    return 0;
}