#include <algorithm>
#include <vector>
#include <iostream>
#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{};
};



Input
input_data(istream& in, bool prompt = true){
	size_t number_count;
	Input iiin;
	if (prompt == true) {

		cerr << "Enter number_count ";
	}
	in >> number_count;

	iiin.numbers.resize(number_count);
	if (prompt == true) {
		cerr << "Enter numbers ";
	}
	for (int i = 0; i < number_count;i++) {
		in >> iiin.numbers[i];
	}
	if (prompt == true) {
		cerr << "Enter bin count \n";
	}
	in >> iiin.bin_count;
	return iiin;
}

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, const string& option) {
	stringstream buffer;

	CURL* curl = curl_easy_init();
	if ((option != "") && (address != "-verbose") && (option != "-verbose")) {
		cout << "Invalid argument, please use -verbose" << endl;
		exit(2);
	}
	if (curl) {
		CURLcode res;
		if (option == "" || option == "-verbose") {
			curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
		}
		else if (address == "-verbose") {
			curl_easy_setopt(curl, CURLOPT_URL, option.c_str());
		}
		curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
		curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
		if (address == "-verbose" || option == "-verbose") {
			curl_easy_setopt(curl, CURLOPT_VERBOSE, option == "-verbose" ? option.c_str() : address.c_str());
		}
		res = curl_easy_perform(curl);
		if (res != CURLE_OK) {
			cout << curl_easy_strerror(res);
			exit(1);
		}
		curl_easy_cleanup(curl);
	}
	return input_data(buffer, false);
}

int main(int argc, char* argv[]) {
	Input in;
	if (argc > 1) {
		in = download(argv[1], argv[2]);
	}
	else {
		in = input_data(cin, true);
	}
	auto bins = make_histogram(in.numbers, in.bin_count);
	show_histogram_svg(bins);
	return 0;
}