chip-gameV3/Assets/Scripts/PrizeSystem/PrizeStockService.cs

using System;
using UnityEngine;

namespace PrizeSystem
{
    public static class PrizeStockService
    {
        public static event Action StateChanged;

        public static int Count => Mathf.Max(PlayerPrefs.GetInt(PrefsKeyVault.PRIZES_AVAILABLE, 0), 0);
        public static bool Enabled => SettingsManager.Initialized
            && SettingsManager.GetBool(SettingKey.PRIZE_STOCK_CONTROL);

        public static void Initialize()
        {
            PlayerPrefs.SetInt(PrefsKeyVault.PRIZES_AVAILABLE, Count);
            SettingsManager.OnSettingsChanged -= NotifyStateChanged;
            SettingsManager.OnSettingsChanged += NotifyStateChanged;
            StateChanged?.Invoke();
        }

        public static void Add(int amount)
        {
            if (amount <= 0)
                return;

            SetCount(Count + amount);
        }

        public static void SetCount(int count)
        {
            int normalizedCount = Mathf.Clamp(count, 0, 999999);

            if (normalizedCount == Count)
                return;

            PlayerPrefs.SetInt(PrefsKeyVault.PRIZES_AVAILABLE, normalizedCount);
            PlayerPrefs.Save();
            StateChanged?.Invoke();
        }

        public static void SetEnabled(bool enabled)
            => SettingsManager.SetBool(SettingKey.PRIZE_STOCK_CONTROL, enabled);

        public static void RecordSuccessfulCountableIssue()
        {
            if (Enabled == false)
                return;

            SetCount(Count - 1);
        }

        private static void NotifyStateChanged()
            => StateChanged?.Invoke();
    }
}