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

public class TalentNodeUI : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
{
    public TalentData talent;
    public TalentManager manager;
    public TalentTooltipUI tooltip;

    public Image backgroundImage;
    public Image iconImage;
    public Text nameText;
    public Text costText;
    public Text stateText;
    public Button learnButton;
    public Outline borderOutline;

    private void Awake()
    {
        if (learnButton == null)
        {
            learnButton = GetComponent<Button>();
        }

        if (backgroundImage == null)
        {
            backgroundImage = GetComponent<Image>();
        }

        if (borderOutline == null)
        {
            borderOutline = GetComponent<Outline>();
        }
    }

    private void OnEnable()
    {
        if (learnButton != null)
        {
            learnButton.onClick.RemoveListener(OnClickLearn);
            learnButton.onClick.AddListener(OnClickLearn);
        }
    }

    private void OnDisable()
    {
        if (learnButton != null)
        {
            learnButton.onClick.RemoveListener(OnClickLearn);
        }
    }

    public void Setup(TalentData talent, TalentManager manager)
    {
        this.talent = talent;
        this.manager = manager;
        Refresh();
    }

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

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

        if (costText != null)
        {
            costText.text = $"{talent.cost} очк.";
        }

        if (iconImage != null)
        {
            iconImage.sprite = talent.icon;
            iconImage.color = talent.icon != null ? Color.white : talent.branchColor;
        }

        bool learned = manager != null && manager.IsLearned(talent);
        bool prerequisitesLearned = manager != null && manager.ArePrerequisitesLearned(talent);
        bool enoughPoints = manager != null && manager.GetAvailableTalentPoints() >= talent.cost;
        bool available = manager != null && manager.CanLearn(talent);

        Color nodeColor = UITheme.LockedNode;
        string state = "Заблокировано";

        if (learned)
        {
            nodeColor = UITheme.LearnedNode;
            state = "Изучено";
        }
        else if (available)
        {
            nodeColor = talent.branchColor;
            state = "Доступно";
        }
        else if (prerequisitesLearned && !enoughPoints)
        {
            nodeColor = UITheme.NotEnoughNode;
            state = "Не хватает очков";
        }

        if (backgroundImage != null)
        {
            backgroundImage.color = new Color(nodeColor.r, nodeColor.g, nodeColor.b, learned || available ? 0.92f : 0.72f);
        }

        if (borderOutline != null)
        {
            borderOutline.effectColor = learned ? UITheme.Gold : (available ? Color.white : UITheme.LockedNode);
        }

        if (stateText != null)
        {
            stateText.text = state;
        }

        if (learnButton != null)
        {
            learnButton.interactable = available;
        }
    }

    public void OnClickLearn()
    {
        if (manager != null && talent != null)
        {
            manager.LearnTalent(talent);
        }
    }

    public void ShowTooltip()
    {
        if (tooltip == null)
        {
            tooltip = FindObjectOfType<TalentTooltipUI>(true);
        }

        if (tooltip != null)
        {
            tooltip.Show(talent, manager);
        }
    }

    public void HideTooltip()
    {
        if (tooltip != null)
        {
            tooltip.Hide();
        }
    }

    public void OnPointerEnter(PointerEventData eventData)
    {
        ShowTooltip();
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        HideTooltip();
    }
}