// Sends a push message to a Gotify server

#include "helpers.hpp"

#include <boost/program_options/options_description.hpp>
#include <boost/program_options/parsers.hpp>
#include <boost/program_options/variables_map.hpp>
#include <nlohmann/json.hpp>
#include <restclient-cpp/connection.h>
#include <restclient-cpp/restclient.h>

#include <cstdint>
#include <exception>
#include <fstream>
#include <iostream>
#include <string>

struct message
{
    std::string base_url;
    std::string token;
    std::string title;
    std::string body;
    std::int16_t priority{5};
} __attribute__((aligned(128))) message;

void read_options(int argc, char *argv[])
{
    namespace po = boost::program_options;

    po::options_description options("Options");
    // clang-format off
    options.add_options()
        ("help,h", "Display this help and exit.")
        ("baseurl", po::value<std::string>()->required(),
         "Example: https://push.example.org")
        ("token", po::value<std::string>()->required(), "Application token.")
        ("title", po::value<std::string>(), "Title of the message.")
        ("message", po::value<std::string>()->required(), "Message body.")
        ("priority", po::value<std::int16_t>(),
         "Priority of the message. Default is 5. "
         "0 = hidden notification, 1-3 = silent, 4-7 = sound, 8-10 = popup.");
    // clang-format on

    po::variables_map vm;
    po::store(po::command_line_parser(argc, argv).options(options).run(), vm);

    std::ifstream configfile(helpers::get_config_file_path("pushmsg.cfg"));
    po::store(po::parse_config_file(configfile, options, true), vm);
    configfile.close();

    if (vm.count("help") != 0)
    {
        std::cout << options;
        std::exit(0); // NOLINT(concurrency-mt-unsafe)
    }
    po::notify(vm);

    message.base_url = vm["baseurl"].as<std::string>();
    message.token = vm["token"].as<std::string>();
    if (vm.count("title") != 0)
    {
        message.title = vm["title"].as<std::string>();
    }
    message.body = vm["message"].as<std::string>();
    if (vm.count("priority") != 0)
    {
        message.priority = vm["priority"].as<std::int16_t>();
    }
}

int main(int argc, char *argv[])
{
    using std::cerr;

    try
    {
        read_options(argc, argv);

        RestClient::init();
        RestClient::Connection conn(message.base_url);
        conn.FollowRedirects(true, 5);
        conn.SetTimeout(30);
        conn.SetHeaders({{"Content-Type", "application/json; charset=utf-8"}});

        const nlohmann::json json{{"title", message.title},
                                  {"message", message.body},
                                  {"priority", message.priority}};
        const auto response{
            conn.post("/message?token=" + message.token, json.dump())};
        RestClient::disable();

        switch (response.code)
        {
        case 200:
        {
            return 0;
            break;
        }
        case 400:
        {
            cerr << "HTTP status 400: Bad Request.\n";
            break;
        }
        case 401:
        {
            cerr << "HTTP status 401: Unauthorized (invalid token).\n";
            break;
        }
        case 403:
        {
            cerr << "HTTP status 403: Forbidden.\n";
            break;
        }
        case 404:
        {
            cerr << "HTTP status 404: Not Found.\n";
            break;
        }
        case 502:
        {
            cerr << "HTTP status 502: Bad Gateway (server down).\n";
            break;
        }
        default:
        {
            cerr << "HTTP status " << response.code << ".\n";
            break;
        }
        }
    }
    catch (const std::exception &e)
    {
        cerr << e.what() << '\n';
    }

    return 1;
}