using System.Collections;
using UnityEngine;
using UnityEngine.UI;

public class DialogueHUD : MonoBehaviour
{
    public static DialogueHUD Instance { get; private set; }

    [Header("UI")]
    public Text hintText;
    public Text statusText;
    public Text inventoryText;

    [Header("Data")]
    public Inventory inventory;
    public float messageDuration = 2.5f;

    private Coroutine messageRoutine;

    private void Awake()
    {
        if (Instance != null && Instance != this)
        {
            Destroy(gameObject);
            return;
        }

        Instance = this;
    }

    private void OnEnable()
    {
        if (inventory != null)
            inventory.OnInventoryChanged += UpdateInventoryText;

        HideHint();
        UpdateInventoryText();
    }

    private void OnDisable()
    {
        if (inventory != null)
            inventory.OnInventoryChanged -= UpdateInventoryText;
    }

    public void ShowHint(string message)
    {
        if (hintText == null)
            return;

        hintText.text = message;
        SetTextRootActive(hintText, !string.IsNullOrEmpty(message));
    }

    public void HideHint()
    {
        if (hintText == null)
            return;

        hintText.text = string.Empty;
        SetTextRootActive(hintText, false);
    }

    public void SetStatus(string message)
    {
        if (statusText == null)
            return;

        statusText.text = message;
        SetTextRootActive(statusText, !string.IsNullOrEmpty(message));

        if (messageRoutine != null)
            StopCoroutine(messageRoutine);

        if (!string.IsNullOrEmpty(message) && gameObject.activeInHierarchy)
            messageRoutine = StartCoroutine(ClearStatusAfterDelay());
    }

    public void UpdateInventoryText()
    {
        if (inventoryText == null)
            return;

        inventoryText.text = inventory != null ? inventory.GetDebugText() : "Инвентарь: недоступен";
    }

    private IEnumerator ClearStatusAfterDelay()
    {
        yield return new WaitForSeconds(messageDuration);

        if (statusText != null)
        {
            statusText.text = string.Empty;
            SetTextRootActive(statusText, false);
        }

        messageRoutine = null;
    }

    private static void SetTextRootActive(Text text, bool active)
    {
        if (text == null)
            return;

        Transform parent = text.transform.parent;
        if (parent != null && parent.GetComponent<Image>() != null)
            parent.gameObject.SetActive(active);
        else
            text.gameObject.SetActive(active);
    }
}