OnBigWheelWin

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

namespace Oxide.Plugins
{
    [Info("BigWheel Payout Cap", "RustPluginGenerator", "1.0.0")]
    [Description("Caps the maximum big wheel payout and optionally exempts privileged players.")]
    public class BigWheelPayoutCap : RustPlugin
    {
        private const string PermExempt = "bigwheelpayoutcap.exempt";
        private PluginConfig config;

        private class PluginConfig
        {
            [JsonProperty("Maximum payout per spin")]
            public int MaxPayout { get; set; } = 500;

            [JsonProperty("Notify player when payout is capped")]
            public bool Notify { get; set; } = true;
        }

        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>
            {
                ["Capped"] = "Your big wheel win was capped at {0}. Better luck next spin.",
                ["InvalidConfig"] = "MaxPayout must be at least 1, using defaults."
            }, this);
        }

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

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

        private void OnServerInitialized()
        {
            if (config.MaxPayout < 1)
            {
                PrintWarning(Msg("InvalidConfig"));
                config.MaxPayout = 500;
                SaveConfig();
            }
        }

        private object OnBigWheelWin(BigWheelGame bigWheelGame, Item slot, BigWheelBettingTerminal terminal, int num)
        {
            if (slot == null || terminal == null || terminal.inventory == null) return null;
            if (num <= 0 || config.MaxPayout < 1) return null;

            var player = slot.GetOwnerPlayer();
            if (player != null && permission.UserHasPermission(player.UserIDString, PermExempt)) return null;

            long payout = (long)slot.amount * num;
            if (payout <= config.MaxPayout) return null;

            int allowedWager = config.MaxPayout / num;
            if (allowedWager < 1) allowedWager = 1;

            slot.amount = allowedWager;
            slot.MarkDirty();
            terminal.inventory.MarkDirty();

            if (config.Notify && player != null && player.IsConnected)
            {
                player.ChatMessage(Msg("Capped", player.UserIDString, config.MaxPayout));
            }

            return null;
        }
    }
}