//
// requester.cpp
// curly
//
// Created by Bob Polis at 2020-09-01
// Copyright (c) 2020 SwiftCoder. All rights reserved.
//

#include "requester.hpp"
#include <libsclogging.hpp>
#include <vector>
#include <cstring>
#include <stdexcept>

extern sc::logger logger;

size_t requester::write_data(char *buf, size_t sz, size_t nmemb, void *user_data) {
    size_t realsize = sz * nmemb;
    SCInfo(logger, "received ", realsize, " bytes");
    std::vector<char>* dest {reinterpret_cast<std::vector<char>*>(user_data)};
    size_t oldsize = dest->size();
    dest->resize(oldsize + realsize);
    std::memcpy(dest->data() + oldsize, buf, realsize);
    return realsize;
}

requester::requester() {
    curl_global_init(CURL_GLOBAL_ALL);
    _h = curl_easy_init();
    curl_easy_setopt(_h, CURLOPT_WRITEFUNCTION, write_data);
}

requester::~requester() {
    if (_h) {
        curl_easy_cleanup(_h);
    }
}

requester::requester(requester&& other) {
    _h = other._h;
    other._h = nullptr;
}

requester& requester::operator=(requester &&other) {
    if (this != &other) {
        if (_h) {
            curl_easy_cleanup(_h);
        }
        _h = other._h;
        other._h = nullptr;
    }
    return *this;
}

std::string requester::get(const std::string &url) {
    curl_easy_setopt(_h, CURLOPT_URL, url.c_str());
    std::vector<char> buf;
    curl_easy_setopt(_h, CURLOPT_WRITEDATA, &buf);
    auto success = curl_easy_perform(_h);
    if (success != CURLE_OK) throw std::runtime_error("could not get remote data");
    std::string text {buf.data(), buf.size()};
    return text;
}