#include <iostream>
#include "network.hpp"

size_t writeCallback( void *contents, size_t size, size_t nmemb, void *target ) {
    *static_cast<std::string*>(target) += std::string(static_cast<char*>(contents), size*nmemb);
    return size * nmemb;
}

Curl::Curl() {
    curl_global_init(CURL_GLOBAL_ALL);
    curl_handle = curl_easy_init();
    curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, writeCallback);
    curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, "libcurl-agent/1.0");
}

Curl::~Curl() {
    curl_easy_cleanup(curl_handle);
    curl_global_cleanup();
}

std::string Curl::execute(const std::string &url) {
    std::string source;
    source.reserve(100000);
    curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, static_cast<void*>(&source));
    curl_easy_setopt(curl_handle, CURLOPT_URL, url.c_str());
    auto res = curl_easy_perform(curl_handle);
    if(res != CURLE_OK) {
        std::cerr << "curl_easy_perform() failed: " << curl_easy_strerror(res) << std::endl;
        return "";
    }
    return source;
}