using Michsky.UI.Reach;
using Player;
using UnityEngine;
using UnityEngine.Serialization;

namespace UI
{
    public class VitalsHUD : MonoBehaviour
    {
        [Header("References")]
        public PlayerVitalsSystem target;
        [FormerlySerializedAs("healthBar")] public ProgressBar thirstBar;
        public ProgressBar hungerBar;
        public ProgressBar sanityBar;

        bool isBound;

        void OnEnable()
        {
            if (target == null)
            {
                target = FindObjectOfType<PlayerVitalsSystem>();
            }

            Bind();
            RefreshAll();
        }

        void OnDisable()
        {
            Unbind();
        }

        void Bind()
        {
            if (isBound) return;
            if (target == null) return;

            target.health.onValueChanged.AddListener(OnThirstChanged);
            target.hunger.onValueChanged.AddListener(OnHungerChanged);
            target.sanity.onValueChanged.AddListener(OnSanityChanged);

            isBound = true;
        }

        void Unbind()
        {
            if (!isBound) return;
            if (target == null) return;

            target.health.onValueChanged.RemoveListener(OnThirstChanged);
            target.hunger.onValueChanged.RemoveListener(OnHungerChanged);
            target.sanity.onValueChanged.RemoveListener(OnSanityChanged);

            isBound = false;
        }

        void RefreshAll()
        {
            if (target == null) return;
            UpdateBar(thirstBar, target.health);
            UpdateBar(hungerBar, target.hunger);
            UpdateBar(sanityBar, target.sanity);
        }

        void UpdateBar(ProgressBar bar, VitalStat stat)
        {
            if (bar == null) return;
            if (stat == null) return;

            bar.minValue = stat.minValue;
            bar.maxValue = stat.maxValue;
            bar.SetValue(stat.currentValue);
        }

        void OnThirstChanged(float _) => UpdateBar(thirstBar, target.health);
        void OnHungerChanged(float _) => UpdateBar(hungerBar, target.hunger);
        void OnSanityChanged(float _) => UpdateBar(sanityBar, target.sanity);
    }
}