How to make a Rust day and night control plugin (Oxide/Carbon)

using System.Linq;
using System;
using System.Collections.Generic;
using Newtonsoft.Json;
using Oxide.Core;
using UnityEngine;

namespace Oxide.Plugins
{
    [Info("DayNightControl", "RustPluginGenerator", "1.0.0")]
    [Description("Skips or shortens nights by fast-forwarding the in-game clock, with /day and /night admin commands.")]
    public class DayNightControl : RustPlugin
    {
        private const string PermAdmin = "daynightcontrol.admin";

        private PluginConfig config;
        private Timer checkTimer;
        private bool skippedThisNight;

        private class PluginConfig
        {
            [JsonProperty("Enable automatic skip")]
            public bool EnableAutomaticSkip { get; set; } = true;

            [JsonProperty("Skip mode (fast forward instead of instant)")]
            public bool SkipMode { get; set; } = true;

            [JsonProperty("Night start hour (0-24)")]
            public float NightStartHour { get; set; } = 19f;

            [JsonProperty("Morning hour (0-24)")]
            public float MorningHour { get; set; } = 6f;

            [JsonProperty("Hours advanced per timer tick")]
            public float SkipStepHours { get; set; } = 0.5f;

            [JsonProperty("Check interval (seconds)")]
            public float CheckIntervalSeconds { get; set; } = 5f;
        }

        protected override void LoadDefaultConfig() => config = new PluginConfig();

        protected override void LoadConfig()
        {
            base.LoadConfig();
            try
            {
                config = Config.ReadObject<PluginConfig>();
                if (config == null) throw new Exception();
            }
            catch
            {
                PrintWarning("Configuration file is invalid, using defaults");
                LoadDefaultConfig();
            }
            SaveConfig();
        }

        protected override void SaveConfig() => Config.WriteObject(config);

        protected override void LoadDefaultMessages()
        {
            lang.RegisterMessages(new Dictionary<string, string>
            {
                ["SetDay"] = "In-game clock set to {0:0.##}:00 (morning).",
                ["SetNight"] = "In-game clock set to {0:0.##}:00 (night start).",
                ["NoPermission"] = "You do not have permission to use this command.",
                ["SkipAnnounce"] = "Night is ending early. Good morning!",
                ["SkyMissing"] = "The sky is not available right now. Is the map fully loaded?"
            }, this);
        }

        private string Msg(string key, string userId = null, params object[] args)
            => string.Format(lang.GetMessage(key, this, userId), args);

        private void Init()
        {
            permission.RegisterPermission(PermAdmin, this);
        }

        private void OnServerInitialized(bool initial)
        {
            CheckSky();

            if (checkTimer != null) checkTimer.Destroy();
            checkTimer = timer.Every(Mathf.Max(1f, config.CheckIntervalSeconds), Tick);
        }

        private void Unload()
        {
            if (checkTimer != null)
            {
                checkTimer.Destroy();
                checkTimer = null;
            }
        }

        private TOD_Sky CheckSky()
        {
            var sky = TOD_Sky.Instance;
            if (sky == null || sky.Cycle == null)
            {
                Puts("TOD_Sky is not ready yet; skipping this check.");
                return null;
            }
            return sky;
        }

        private void Tick()
        {
            if (!config.EnableAutomaticSkip) return;

            var sky = CheckSky();
            if (sky == null) return;

            float hour = sky.Cycle.Hour;

            if (hour >= config.MorningHour && hour < config.NightStartHour)
            {
                skippedThisNight = false;
                return;
            }

            if (skippedThisNight) return;
            if (hour < config.NightStartHour && hour >= config.MorningHour) return;

            if (!config.SkipMode)
            {
                SetHour(sky, config.MorningHour);
                skippedThisNight = true;
                Server.Broadcast(Msg("SkipAnnounce"));
                return;
            }

            float next = hour + Mathf.Max(0.05f, config.SkipStepHours);
            if (next >= 24f) next -= 24f;

            if (HoursBetween(next, config.MorningHour) < 0.05f || next >= config.MorningHour)
            {
                SetHour(sky, config.MorningHour);
                skippedThisNight = true;
                Server.Broadcast(Msg("SkipAnnounce"));
                return;
            }

            SetHour(sky, next);
        }

        private static float HoursBetween(float from, float to)
        {
            float diff = to - from;
            if (diff < 0f) diff += 24f;
            return diff;
        }

        private void SetHour(TOD_Sky sky, float hour)
        {
            if (sky == null || sky.Cycle == null) return;
            sky.Cycle.Hour = hour;
        }

        [ChatCommand("day")]
        private void CmdDay(BasePlayer player, string command, string[] args)
        {
            if (player != null && !permission.UserHasPermission(player.UserIDString, PermAdmin))
            {
                player.ChatMessage(Msg("NoPermission", player.UserIDString));
                return;
            }

            var sky = CheckSky();
            if (sky == null)
            {
                if (player != null) player.ChatMessage(Msg("SkyMissing", player.UserIDString));
                return;
            }

            SetHour(sky, config.MorningHour);
            skippedThisNight = true;
            if (player != null) player.ChatMessage(Msg("SetDay", player.UserIDString, config.MorningHour));
        }

        [ChatCommand("night")]
        private void CmdNight(BasePlayer player, string command, string[] args)
        {
            if (player != null && !permission.UserHasPermission(player.UserIDString, PermAdmin))
            {
                player.ChatMessage(Msg("NoPermission", player.UserIDString));
                return;
            }

            var sky = CheckSky();
            if (sky == null)
            {
                if (player != null) player.ChatMessage(Msg("SkyMissing", player.UserIDString));
                return;
            }

            SetHour(sky, config.NightStartHour);
            skippedThisNight = false;
            if (player != null) player.ChatMessage(Msg("SetNight", player.UserIDString, config.NightStartHour));
        }
    }
}