OnBigWheelLoss

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

namespace Oxide.Plugins
{
    [Info("Big Wheel Loss Refund", "RustPluginGenerator", "1.0.0")]
    [Description("Refunds big wheel bets for players listed in the config")]
    public class BigWheelLossRefund : RustPlugin
    {
        private const string PermRefund = "bigwheellossrefund.refund";

        private PluginConfig config;
        private readonly Dictionary<string, int> refundTotals = new Dictionary<string, int>();

        private class PluginConfig
        {
            [JsonProperty("Refunded player user IDs")]
            public List<string> RefundedUserIds = new List<string>();

            [JsonProperty("Announce refund on next tick")]
            public bool Announce = 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>
            {
                ["Refunded"] = "Your {0} x {1} bet was refunded.",
                ["NoPermission"] = "You do not have permission to use this command.",
                ["Total"] = "Refunded bets recorded: {0}"
            }, 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(PermRefund, this);
        }

        private object OnBigWheelLoss(BigWheelGame bigWheelGame, Item betItem, BigWheelBettingTerminal terminal)
        {
            if (terminal == null || betItem == null || betItem.info == null) return null;

            BasePlayer player = terminal.lastPlayer;
            if (player == null || !player.IsConnected) return null;

            string userId = player.UserIDString;
            if (!config.RefundedUserIds.Contains(userId) && !permission.UserHasPermission(userId, PermRefund))
                return null;

            int amount = betItem.amount;
            string shortname = betItem.info.shortname;

            NextTick(() =>
            {
                int total;
                refundTotals.TryGetValue(userId, out total);
                refundTotals[userId] = total + amount;

                if (config.Announce)
                    player.ChatMessage(Msg("Refunded", userId, amount, shortname));
            });

            return true;
        }

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

            int total;
            refundTotals.TryGetValue(player.UserIDString, out total);
            player.ChatMessage(Msg("Total", player.UserIDString, total));
        }

        private void Unload()
        {
            refundTotals.Clear();
        }
    }
}