using System;
using UnityEngine;

namespace OTG.Lab06.Core
{
    [Serializable]
    public sealed class ResourceStat
    {
        [SerializeField] private float maxValue = 100f;
        [SerializeField] private float currentValue = 100f;

        public event Action<float, float> Changed;

        public float Current => currentValue;
        public float Max => maxValue;
        public float Normalized => maxValue <= 0f ? 0f : currentValue / maxValue;

        public ResourceStat(float maxValue)
        {
            this.maxValue = Mathf.Max(1f, maxValue);
            currentValue = this.maxValue;
        }

        public void Initialize(float value)
        {
            maxValue = Mathf.Max(1f, value);
            currentValue = maxValue;
            Changed?.Invoke(currentValue, maxValue);
        }

        public bool TrySpend(float amount)
        {
            if (amount <= 0f)
            {
                return true;
            }

            if (currentValue < amount)
            {
                return false;
            }

            SetCurrent(currentValue - amount);
            return true;
        }

        public void Add(float amount)
        {
            if (amount <= 0f)
            {
                return;
            }

            SetCurrent(currentValue + amount);
        }

        public void Subtract(float amount)
        {
            if (amount <= 0f)
            {
                return;
            }

            SetCurrent(currentValue - amount);
        }

        private void SetCurrent(float value)
        {
            currentValue = Mathf.Clamp(value, 0f, maxValue);
            Changed?.Invoke(currentValue, maxValue);
        }
    }
}