using System;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
using TMPro;

namespace Ashwild.Building
{
    /// <summary>
    /// One clickable card in the construction menu — a pure view. It renders the icon/label it is
    /// handed and reports a left-click back by its index, never resolving what it represents. The
    /// manager that populated the menu maps that index to a buildable and decides what the pick does.
    /// </summary>
    [DisallowMultipleComponent]
    public class BuildMenuCardUI : MonoBehaviour, IPointerClickHandler
    {
        #region Serialized Fields

        [Header("References")]
        [SerializeField] private Image iconImage;
        [SerializeField] private TextMeshProUGUI nameText;

        #endregion

        #region State

        /// <summary>
        /// This card's position in the menu, reported back on click.
        /// </summary>
        private int index;

        /// <summary>
        /// Invoked with this card's index when the player left-clicks it.
        /// </summary>
        private Action<int> onSelected;

        #endregion

        #region Public API

        /// <summary>
        /// Binds the card to its index and the menu's selection callback, then draws the payload.
        /// </summary>
        public void Initialize(BuildCardView view, int cardIndex, Action<int> selectedCallback)
        {
            index = cardIndex;
            onSelected = selectedCallback;

            if (iconImage != null)
            {
                iconImage.sprite = view.Icon;
                iconImage.enabled = view.Icon != null;
            }
            if (nameText != null)
                nameText.text = view.Label;
        }

        #endregion

        #region Event Handlers

        /// <summary>
        /// Reports a left-click to the menu by index; other buttons are ignored.
        /// </summary>
        public void OnPointerClick(PointerEventData eventData)
        {
            Debug.Log($"[BuildMenuCardUI] Click reçu — button={eventData.button}, index={index}", this);
            if (eventData.button != PointerEventData.InputButton.Left) return;
            if (onSelected == null)
            {
                Debug.LogWarning("[BuildMenuCardUI] onSelected est null — la carte n'a pas été Initialize().", this);
                return;
            }
            Debug.Log($"[BuildMenuCardUI] Invoke onSelected({index})", this);
            onSelected.Invoke(index);
        }

        #endregion
    }
}