#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;
    string stroke_color = "black";
};

Input input_data(istream& in, bool prompt) {
    Input inp;
    size_t number_count;
    if (prompt) cerr << "Enter number count: ";
    in >> number_count;
    inp.numbers.resize(number_count);
    if (prompt) cerr << "Enter numbers: ";
    for (size_t i = 0; i < number_count; i++) {
        in >> inp.numbers[i];
    }
    if (prompt) cerr << "Enter bin count: ";
    in >> inp.bin_count;
    return inp;
}

size_t write_data(void* items, size_t item_size, size_t item_count, void* ctx) {
    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
    size_t data_size = item_size * item_count;
    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) {
        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
        CURLcode res = curl_easy_perform(curl);
        if (res != CURLE_OK) {
            cerr << curl_easy_strerror(res);
            exit(1);
        }
        curl_easy_cleanup(curl);
    }
    return input_data(buffer, false);
}

void process_args(int argc, char* argv[], Input& input) {
    for (int i = 1; i < argc; i++) {
        if (string(argv[i]) == "-stroke") {
            if (i + 1 < argc) {
                input.stroke_color = argv[i + 1];
                i++;
            } else {
                cerr << "Error: trebueca one argument.\n";
                exit(1);
            }
        }
    }
}

int main(int argc, char* argv[]) {
    Input input;
    process_args(argc, argv, input);

    bool url_provided = false;
    for (int i = 1; i < argc; i++) {
        if (string(argv[i]) != "-stroke" && argv[i][0] != '-') {
            input = download(argv[i]);
            url_provided = true;
            break;
        }
    }

    if (!url_provided) {
        input = input_data(cin, true);
    }

    auto bins = make_histogram(input.numbers, input.bin_count);
    show_histogram_svg(bins, input.stroke_color);
    return 0;
}