using OTG.Lab06.Abilities;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace OTG.Lab06.UI
{
    public sealed class AbilitySlotUI : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
    {
        [SerializeField] private Image icon;
        [SerializeField] private Image cooldownOverlay;
        [SerializeField] private Text hotkeyLabel;
        [SerializeField] private Text nameLabel;
        [SerializeField] private Text manaLabel;
        [SerializeField] private Text cooldownLabel;

        private AbilityRuntime runtime;
        private TooltipUI tooltip;

        public void Bind(AbilityRuntime abilityRuntime, int index, TooltipUI tooltipUI)
        {
            runtime = abilityRuntime;
            tooltip = tooltipUI;

            if (icon != null)
            {
                icon.sprite = runtime.Data.icon;
                icon.color = runtime.Data.icon == null ? new Color(0.35f, 0.35f, 0.35f, 1f) : Color.white;
            }

            if (hotkeyLabel != null)
            {
                hotkeyLabel.text = (index + 1).ToString();
            }

            if (manaLabel != null)
            {
                manaLabel.text = Mathf.RoundToInt(runtime.Data.manaCost).ToString();
            }

            if (nameLabel != null)
            {
                nameLabel.text = GetShortName(runtime.Data.abilityName);
            }

            Refresh();
        }

        private static string GetShortName(string abilityName)
        {
            if (string.IsNullOrWhiteSpace(abilityName))
            {
                return string.Empty;
            }

            return abilityName.Length <= 9 ? abilityName : abilityName.Substring(0, 9);
        }

        private void Update()
        {
            Refresh();
        }

        private void Refresh()
        {
            if (runtime == null)
            {
                return;
            }

            if (cooldownOverlay != null)
            {
                cooldownOverlay.fillAmount = runtime.CooldownNormalized;
            }

            if (cooldownLabel != null)
            {
                bool show = runtime.CooldownRemaining > 0.05f;
                cooldownLabel.gameObject.SetActive(show);
                if (show)
                {
                    cooldownLabel.text = runtime.CooldownRemaining.ToString("0.0");
                }
            }
        }

        public void OnPointerEnter(PointerEventData eventData)
        {
            if (tooltip != null && runtime != null)
            {
                tooltip.Show(runtime.Data, transform as RectTransform);
            }
        }

        public void OnPointerExit(PointerEventData eventData)
        {
            if (tooltip != null)
            {
                tooltip.Hide();
            }
        }
    }
}