Cooldown.cs

using System;

using UnityEngine;

namespace Common {
    public interface IReadOnlyCooldown {
        public long LastTrigger { get; }
        public long CooldownTime { get; }
        public long NextTriggerIn { get; }
        public long MillisElapsedSinceLastTrigger { get; }
        public float CooldownProgress { get; }
        public bool IsCooldown { get; }
        public bool IsReady { get; }
    }

public class Cooldown : IReadOnlyCooldown {
        public long LastTrigger { get; private set; } = long.MinValue;

        public long CooldownTime { get; set; }

        public Cooldown(long cooldown = 0) {
            CooldownTime = cooldown;
        }

        public long NextTriggerIn => LastTrigger + CooldownTime <= 0 ? 0 : LastTrigger + CooldownTime;
        public long MillisElapsedSinceLastTrigger => DateTimeOffset.Now.ToUnixTimeMilliseconds() - LastTrigger;
        public float CooldownProgress => Mathf.Abs((float)MillisElapsedSinceLastTrigger / CooldownTime);

        public bool IsCooldown => LastTrigger >= DateTimeOffset.Now.ToUnixTimeMilliseconds() - CooldownTime;
        public bool IsReady => !IsCooldown;

        public bool TryTrigger() {
            if (IsCooldown) return false;

            LastTrigger = DateTimeOffset.Now.ToUnixTimeMilliseconds();

            return true;
        }

        public void Trigger() {
            LastTrigger = DateTimeOffset.Now.ToUnixTimeMilliseconds();
        }

        public void Reset() {
            LastTrigger = long.MinValue;
        }
    }
}