#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 NVDA's file (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/sec/nvda.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 stock = nlohmann::json::parse(body);

    // How many funds hold it: in their issuers' own files, and in SEC filings
    std::cout << "NVDA held_by " << stock["held_by"].get<int>()
              << " (issuer files), held_by_sec_nport "
              << stock["held_by_sec_nport"].get<int>() << " (SEC filings)\n";

    // holders is sorted, largest weight first: [fund, weight %, file date]
    for (auto& h : stock["holders"]) {
        std::cout << h[0].get<std::string>() << " " << h[1].get<double>()
                  << " " << h[2].get<std::string>() << "\n";
    }

    // The line to print under any figure you quote
    std::cout << stock["cite_as"].get<std::string>() << "\n";
}