using System;
using TMPro;
using UnityEngine;
using UnityEngine.UI;
using Ashwild.Player;

namespace Ashwild.Settings
{
    /// <summary>
    /// One rebindable-key row: an action label, the current key (shown as a glyph when an icon is
    /// available, otherwise as text), a Rebind button and a Reset button. Pure UI — it holds the
    /// config entry's action name + binding index and raises callbacks; it knows nothing about the
    /// Input System. Mirrors SlotUI/RecipeButtonUI: the panel calls Initialize once, then RefreshDisplay.
    /// </summary>
    public class KeybindRowUI : MonoBehaviour
    {
        #region Serialized Fields

        [Header("References")]
        [SerializeField] private TMP_Text labelText;
        [SerializeField] private TMP_Text keyText;
        [SerializeField] private Image keyIcon;
        [SerializeField] private Button rebindButton;
        [SerializeField] private Button resetButton;

        #endregion

        #region State

        private string actionName;
        private int bindingIndex;
        private Action<KeybindRowUI> onRebind;
        private Action<KeybindRowUI> onReset;

        public string ActionName => actionName;
        public int BindingIndex => bindingIndex;

        #endregion

        #region Public API

        /// <summary>
        /// Binds this row to its config entry and the panel callbacks. Call once after Instantiate.
        /// </summary>
        public void Initialize(RebindableEntry entry, Action<KeybindRowUI> onRebind, Action<KeybindRowUI> onReset)
        {
            actionName = entry.ActionName;
            bindingIndex = entry.BindingIndex;
            this.onRebind = onRebind;
            this.onReset = onReset;

            if (labelText != null) labelText.text = entry.DisplayLabel;

            if (rebindButton != null)
            {
                rebindButton.onClick.RemoveAllListeners();
                rebindButton.onClick.AddListener(() => this.onRebind?.Invoke(this));
            }
            if (resetButton != null)
            {
                resetButton.onClick.RemoveAllListeners();
                resetButton.onClick.AddListener(() => this.onReset?.Invoke(this));
            }
        }

        /// <summary>
        /// Shows the current key as a glyph when an icon is supplied, otherwise as text.
        /// </summary>
        public void RefreshDisplay(string keyDisplay, Sprite icon)
        {
            bool hasIcon = icon != null;

            if (keyIcon != null)
            {
                keyIcon.enabled = hasIcon;
                if (hasIcon) keyIcon.sprite = icon;
            }
            if (keyText != null)
            {
                keyText.gameObject.SetActive(!hasIcon);
                keyText.text = keyDisplay;
            }
        }

        #endregion
    }
}