OnFireworkExhausted

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

namespace Oxide.Plugins
{
    [Info("Firework Exhausted Reward", "RustPluginGenerator", "1.0.0")]
    [Description("Rewards the player who launched a firework once it burns out, with a per-player cooldown.")]
    public class FireworkExhaustedReward : RustPlugin
    {
        private const string PermUse = "fireworkexhaustedreward.use";

        private PluginConfig config;
        private readonly Dictionary<ulong, float> lastReward = new Dictionary<ulong, float>();

        private class PluginConfig
        {
            [JsonProperty("Require permission")]
            public bool RequirePermission { get; set; } = false;

            [JsonProperty("Reward item shortname")]
            public string RewardItem { get; set; } = "scrap";

            [JsonProperty("Reward amount")]
            public int RewardAmount { get; set; } = 5;

            [JsonProperty("Cooldown seconds per player")]
            public float CooldownSeconds { get; set; } = 30f;

            [JsonProperty("Max distance from firework to reward")]
            public float MaxDistance { get; set; } = 50f;
        }

        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>
            {
                ["Reward"] = "Your firework burned out. Here is {0} x{1}.",
                ["NoRoom"] = "Your firework burned out, but there was no room for {0} x{1}."
            }, 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(PermUse, this);
        }

        private void OnFireworkExhausted(BaseFirework firework)
        {
            if (firework == null || firework.OwnerID == 0 || config.RewardAmount <= 0)
                return;

            var player = BasePlayer.FindByID(firework.OwnerID);
            if (player == null || !player.IsConnected || player.IsDead())
                return;

            if (config.RequirePermission && !permission.UserHasPermission(player.UserIDString, PermUse))
                return;

            float now = UnityEngine.Time.realtimeSinceStartup;
            float last;
            if (lastReward.TryGetValue(player.userID.Get(), out last) && now - last < config.CooldownSeconds)
                return;

            if (UnityEngine.Vector3.Distance(player.transform.position, firework.transform.position) > config.MaxDistance)
                return;

            var definition = ItemManager.FindItemDefinition(config.RewardItem);
            if (definition == null)
                return;

            lastReward[player.userID.Get()] = now;

            var item = ItemManager.CreateByName(config.RewardItem, config.RewardAmount);
            if (item == null)
                return;

            if (!player.inventory.GiveItem(item))
            {
                item.Remove();
                player.ChatMessage(Msg("NoRoom", player.UserIDString, definition.displayName.english, config.RewardAmount));
                return;
            }

            player.ChatMessage(Msg("Reward", player.UserIDString, definition.displayName.english, config.RewardAmount));
        }

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