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

namespace Cryville.Crtr.Browsing.UI {
	[RequireComponent(typeof(BrowserTabLayout))]
	[RequireComponent(typeof(CanvasGroup))]
	internal class BrowserTab : MonoBehaviour, IPointerClickHandler {
		[SerializeField]
		Image m_icon;
		[SerializeField]
		TextMeshProUGUI m_text;
		[SerializeField]
		float m_deselectedAlpha = 0.6f;

		public event Action<BrowserTab> Clicked;

		public Sprite Icon {
			get { return m_icon.sprite; }
			set { m_icon.sprite = value; }
		}
		public string Text {
			get { return m_text.text; }
			set { m_text.text = value; }
		}

		bool m_selected;
		public bool Selected {
			get { return m_selected; }
			set {
				if (m_selected == value) return;
				m_selected = value;
				UpdateSelected();
			}
		}
		void UpdateSelected() {
			_group.alpha = Selected ? 1 : m_deselectedAlpha;
			_layout.Selected = Selected;
		}

		CanvasGroup _group;
		BrowserTabLayout _layout;
		void Awake() {
			_group = GetComponent<CanvasGroup>();
			_layout = GetComponent<BrowserTabLayout>();
			UpdateSelected();
		}

		public void OnPointerClick(PointerEventData eventData) {
			Clicked?.Invoke(this);
		}
	}
}