using TMPro;
using UnityEngine;
using DG.Tweening;

public class InstructionManager : MonoBehaviour
{
    public static InstructionManager Instance;

    [Header("Screen Instruction (HUD)")]
    public GameObject instructionBG;              // The background image object
    public TextMeshProUGUI instructionText;       // The TMP text inside the background

    [Header("Speech Bubble UI")]
    public GameObject speechBubbleObj;            // The bubble GameObject (inside its own canvas)
    public TextMeshProUGUI speechText;            // The TMP text inside the speech bubble
    public Vector3 offset = new Vector3(0, 2f, 0); // Offset from followTarget

    private Transform followTarget;               // Target the speech bubble follows
    private Camera mainCam;

    [Header("Optional Settings")]
    public float fadeDuration = 0.5f;             // Not used unless you want to add tween effects later

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

        Instance = this;
        mainCam = Camera.main;

        if (instructionBG != null)
            instructionBG.SetActive(false);

        if (speechBubbleObj != null)
            speechBubbleObj.SetActive(false);
    }

    void LateUpdate()
    {
        // Reposition speech bubble to follow world target
        if (speechBubbleObj != null && followTarget != null)
        {
            Vector3 screenPos = mainCam.WorldToScreenPoint(followTarget.position + offset);
            speechBubbleObj.transform.position = screenPos;
        }
    }

    // Show screen HUD instruction with localization key
    public void ShowScreenInstruction(string key, float autoHideDelay = -1f)
    {
        if (LanguageManager.Instance == null || instructionText == null || instructionBG == null)
            return;

        string localized = LanguageManager.Instance.GetLocalizedText(key);
        bool isArabic = LanguageManager.Instance.currentLanguage == "Arabic";

        instructionText.text = isArabic
            ? ArabicFixerHelper.FixPreservingTags(localized)
            : localized;

        instructionText.font = LanguageManager.Instance.GetCurrentFont();

        instructionBG.SetActive(true);

        if (autoHideDelay > 0)
            Invoke(nameof(HideScreenInstruction), autoHideDelay);
    }

    public void HideScreenInstruction()
    {
        if (instructionBG != null)
            instructionBG.SetActive(false);
    }

    // Show speech bubble above a world target (e.g., teacher's head)
    public void ShowSpeechBubble(string key, Transform target, float autoHideDelay = -1f)
    {
        if (LanguageManager.Instance == null || speechText == null || speechBubbleObj == null)
            return;

        string localized = LanguageManager.Instance.GetLocalizedText(key);
        bool isArabic = LanguageManager.Instance.currentLanguage == "Arabic";

        speechText.text = isArabic
            ? ArabicFixerHelper.FixPreservingTags(localized)
            : localized;

        speechText.font = LanguageManager.Instance.GetCurrentFont();

        followTarget = target;
        speechBubbleObj.SetActive(true);

        if (autoHideDelay > 0)
            Invoke(nameof(HideSpeechBubble), autoHideDelay);
    }

    public void HideSpeechBubble()
    {
        speechBubbleObj.SetActive(false);
        followTarget = null;
    }
}