#include <curl/curl.h>
#include <nlohmann/json.hpp>

#include <iostream>
#include <string>

// libcurl hands the body over in pieces: append each one to a string
static size_t append(char* data, size_t size, size_t n, void* body) {
    static_cast<std::string*>(body)->append(data, size * n);
    return size * n;
}

int main() {
    // Read the list of covered funds (one GET, no key), naming your own
    // project
    std::string body;
    CURL* curl = curl_easy_init();
    curl_easy_setopt(curl, CURLOPT_URL,
                     "https://tickerinside.com/api/v1/funds.json");
    curl_easy_setopt(curl, CURLOPT_USERAGENT,
                     "MyProject/1.0 (+https://example.com)");
    curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1L);
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, append);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, &body);
    CURLcode rc = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
    if (rc != CURLE_OK) {
        std::cerr << curl_easy_strerror(rc) << "\n";
        return 1;
    }
    auto doc = nlohmann::json::parse(body);

    // funds: read from their issuers' own files, with the date of the data
    std::cout << doc["count"].get<int>() << " funds from issuer files, as_of "
              << doc["as_of"].get<std::string>() << "\n";
    // sec_funds: more US stock ETFs, from SEC filings, t and n as in funds
    std::cout << doc["sec_count"].get<int>()
              << " more from SEC filings, listed in sec_funds\n";

    // One entry per fund: t is the ticker, n the name
    for (auto& f : doc["funds"]) {
        std::cout << f["t"].get<std::string>() << " "
                  << f["n"].get<std::string>() << "\n";
    }
}