/**
 *   ESP32 SvelteKit
 *
 *   A simple, secure and extensible framework for IoT projects for ESP32 platforms
 *   with responsive Sveltekit front-end built with TailwindCSS and DaisyUI.
 *   https://github.com/theelims/ESP32-sveltekit
 *
 *   Copyright (C) 2018 - 2023 rjwats
 *   Copyright (C) 2023 theelims
 *
 *   All Rights Reserved. This software may be modified and distributed under
 *   the terms of the LGPL v3 license. See the LICENSE file for details.
 **/

#include <NTPStatus.h>

NTPStatus::NTPStatus(PsychicHttpServer *server) : _server(server) {}

void NTPStatus::begin() {
    _server->on(NTP_STATUS_SERVICE_PATH, HTTP_GET, [this](PsychicRequest *request) { return ntpStatus(request); });

    ESP_LOGV("NTPStatus", "Registered GET endpoint: %s", NTP_STATUS_SERVICE_PATH);
}

/*
 * Formats the time using the format provided.
 *
 * Uses a 25 byte buffer, large enough to fit an ISO time string with offset.
 */
String formatTime(tm *time, const char *format) {
    char time_string[25];
    strftime(time_string, 25, format, time);
    return String(time_string);
}

String toUTCTimeString(tm *time) { return formatTime(time, "%FT%TZ"); }

String toLocalTimeString(tm *time) { return formatTime(time, "%FT%T"); }

esp_err_t NTPStatus::ntpStatus(PsychicRequest *request) {
    PsychicJsonResponse response = PsychicJsonResponse(request, false);
    JsonObject root = response.getRoot();

    // grab the current instant in unix seconds
    time_t now = time(nullptr);

    // only provide enabled/disabled status for now
    root["status"] = sntp_enabled() ? 1 : 0;

    // the current time in UTC
    root["utc_time"] = toUTCTimeString(gmtime(&now));

    // local time with offset
    root["local_time"] = toLocalTimeString(localtime(&now));

    // the sntp server name
    root["server"] = sntp_getservername(0);

    // device uptime in seconds
    root["uptime"] = millis() / 1000;

    return response.send();
}