// A small async HTTP/1.1 GET client over asio, with TLS support.
//
// Written rather than pulled in (libcurl) because we need exactly one verb, and
// libcurl's threading/blocking model does not fit the single control thread we
// run everything else on. Scope is deliberately narrow: GET, redirects, a hard
// byte cap, and a deadline.
#pragma once

#include <asio.hpp>

#include <chrono>
#include <functional>
#include <string>
#include <system_error>

namespace ovg::http {

struct Url {
  std::string scheme;  // "http" or "https"
  std::string host;
  std::string port;    // always populated (defaulted from scheme)
  std::string target;  // path + query, starts with '/'
};

bool parse_url(const std::string &text, Url *out);

struct Response {
  int status = 0;
  std::string body;
};

using Handler = std::function<void(std::error_code, Response)>;

struct Options {
  std::chrono::milliseconds timeout{30000};
  size_t max_bytes = 32u * 1024 * 1024;
  int max_redirects = 3;
  std::string user_agent = "openvpngate/0.1";
  // TLS peer verification. Only disable for a mirror you control.
  bool verify_tls = true;
};

// Invokes `handler` exactly once, on `io`'s executor.
void async_get(asio::io_context &io, const std::string &url,
               const Options &opts, Handler handler);

}  // namespace ovg::http