using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace OTGIntegrated.Talents
{
    public sealed class TalentNodeUI : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
    {
        public Image background;
        public Text titleText;
        public Text costText;
        public Button button;

        private TalentData talent;
        private TalentManager manager;
        private TalentTooltipUI tooltip;

        public TalentData Talent => talent;

        public void Initialize(TalentData talent, TalentManager manager, TalentTooltipUI tooltip, Font font)
        {
            this.talent = talent;
            this.manager = manager;
            this.tooltip = tooltip;

            if (background == null) background = GetComponent<Image>();
            if (button == null) button = GetComponent<Button>();
            if (titleText != null)
            {
                titleText.font = font != null ? font : Resources.GetBuiltinResource<Font>("Arial.ttf");
            }

            if (costText != null)
            {
                costText.font = font != null ? font : Resources.GetBuiltinResource<Font>("Arial.ttf");
            }

            if (button != null)
            {
                button.onClick.RemoveAllListeners();
                button.onClick.AddListener(() =>
                {
                    if (this.manager != null)
                    {
                        this.manager.LearnTalent(this.talent);
                    }
                });
            }

            Refresh();
        }

        public void Refresh()
        {
            if (talent == null)
            {
                return;
            }

            if (titleText != null)
            {
                titleText.text = talent.displayName;
            }

            if (costText != null)
            {
                costText.text = talent.cost.ToString();
            }

            bool learned = manager != null && manager.IsLearned(talent);
            bool canLearn = manager != null && manager.CanLearn(talent);
            bool prereqReady = manager != null && manager.ArePrerequisitesLearned(talent);

            if (background != null)
            {
                if (learned)
                {
                    background.color = new Color(0.86f, 0.68f, 0.22f, 0.96f);
                }
                else if (canLearn)
                {
                    background.color = new Color(0.2f, 0.48f, 0.72f, 0.94f);
                }
                else if (prereqReady)
                {
                    background.color = new Color(0.18f, 0.2f, 0.26f, 0.92f);
                }
                else
                {
                    background.color = new Color(0.09f, 0.1f, 0.12f, 0.88f);
                }
            }

            if (button != null)
            {
                button.interactable = canLearn;
            }
        }

        public void OnPointerEnter(PointerEventData eventData)
        {
            tooltip?.Show(talent, manager);
        }

        public void OnPointerExit(PointerEventData eventData)
        {
            tooltip?.Hide();
        }
    }
}