#include <iostream>
#include <httplib.h>
#include <noolite.h>

namespace App {

constexpr auto DefaultPort = 8888;
constexpr auto DefaultHost = "0.0.0.0";
constexpr auto ContentType = "application/json";

static httplib::Server *srv = nullptr;

}

void signalHandler(int signum) {
    std::cout << "\n\nInterrupt signal (" << signum << ") received.\n";

    if (App::srv) {
        App::srv->stop();
        delete App::srv;
    }

    exit(signum);
}

int main(int argc, char *argv[])
{
    std::signal(SIGINT, signalHandler);

    App::srv = new httplib::Server();

    const std::map< std::string, noolitelib::Command > commands = {
        { "off", noolitelib::Off },
        { "decraseBrightnes", noolitelib::DecraseBrightnes },
        { "on", noolitelib::On },
        { "incraseBrightnes", noolitelib::IncreaseBrightnes },
        { "switch", noolitelib::Switch },
        { "invertBrightnes", noolitelib::InvertBrightnes },
        { "set", noolitelib::Set },
        { "callScenario", noolitelib::CallScenario },
        { "saveScenario", noolitelib::SaveScenario },
        { "unbind", noolitelib::Unbind },
        { "stopColorSelection", noolitelib::StopColorSelection },
        { "bind", noolitelib::Bind },
        { "colorSelection", noolitelib::ColorSelection },
        { "colorSwitch", noolitelib::ColorSwitch },
        { "modeSwitch", noolitelib::ModeSwitch },
        { "effectSpeed", noolitelib::EffectSpeed }
    };

    App::srv->Get("/noolite/:command/:channel", [&commands](const httplib::Request &req, httplib::Response &res) {

        auto formatResult = [](bool successful, const std::string &text) -> std::string {
            std::stringstream res;
            res << "{\"" << (successful ? "result" : "error")
                << "\":\"" << (successful ? "ok" : text) << "\"";
            if (successful) {
                res << (",\"command\":\"" + text + "\"");
            }
            res << "}";

            return res.str();
        };

        auto command = req.path_params.at("command");
        if (!commands.count(command)) {
            res.set_content(formatResult(false, "Command not found"), App::ContentType);
            return;
        }

        auto channel = req.path_params.at("channel");

        noolitelib::Noolite adapter;
        if (adapter.sendCommand(std::stoi(channel), commands.at(command))) {
            res.set_content(formatResult(true, command + " " + channel), App::ContentType);
        } else {
            res.set_content(formatResult(false, "Device error"), App::ContentType);
        }
    });

    App::srv->set_mount_point("/static", "/var/www/static");

    auto host = argc > 1 ? argv[1] : App::DefaultHost;
    auto port = argc > 2 ? atoi(argv[2]) : App::DefaultPort;

    std::cout << "Listen on " << host << ":" << port << std::endl;

    App::srv->listen(host, port);

    return 0;
}