using UnityEngine;

namespace Player
{
    public class PlayerVitalsSystem : MonoBehaviour
    {
        public static PlayerVitalsSystem Instance { get; private set; }

        [Header("Vitals")]
        public VitalStat health = new VitalStat();
        public VitalStat hunger = new VitalStat();
        public VitalStat sanity = new VitalStat();

        public VitalStat thirst => health;

        [Header("Runtime")]
        public bool runDecay = true;

        void Reset()
        {
            if (string.IsNullOrWhiteSpace(health.id)) health.id = "health";
            if (string.IsNullOrWhiteSpace(hunger.id)) hunger.id = "hunger";
            if (string.IsNullOrWhiteSpace(sanity.id)) sanity.id = "sanity";
        }

        void Awake()
        {
            if (Instance != null && Instance != this)
            {
                Destroy(gameObject);
                return;
            }

            Instance = this;

            if (string.IsNullOrWhiteSpace(health.id)) health.id = "health";
            if (string.IsNullOrWhiteSpace(hunger.id)) hunger.id = "hunger";
            if (string.IsNullOrWhiteSpace(sanity.id)) sanity.id = "sanity";

            health.Initialize(invokeEvents: true);
            hunger.Initialize(invokeEvents: true);
            sanity.Initialize(invokeEvents: true);
        }

        void Update()
        {
            if (!runDecay) return;
            float dt = Time.deltaTime;
            health.Tick(dt);
            hunger.Tick(dt);
            sanity.Tick(dt);
        }

        public void ApplyDelta(float thirstDelta, float hungerDelta, float sanityDelta)
        {
            if (thirstDelta != 0f) health.Add(thirstDelta);
            if (hungerDelta != 0f) hunger.Add(hungerDelta);
            if (sanityDelta != 0f) sanity.Add(sanityDelta);
        }

        public void AddHealth(float delta) => health.Add(delta);
        public void AddHunger(float delta) => hunger.Add(delta);
        public void AddSanity(float delta) => sanity.Add(delta);
    }
}