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

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

    [Header("UI Components")]
    [SerializeField] private GameObject guestInfoPanel;
    [SerializeField] private Text guestNameText;
    [SerializeField] private Text guestTypeText;
    [SerializeField] private Text guestStateText;
    [SerializeField] private Image moodImage;
    [SerializeField] private Text satisfactionText;
    [SerializeField] private Text patienceText;
    [SerializeField] private Transform wishesContainer;
    [SerializeField] private Transform moodReasonsContainer;
    [SerializeField] private Button closeButton;

    [Header("Prefabs")]
    [SerializeField] private GameObject wishItemPrefab;
    [SerializeField] private GameObject moodReasonPrefab;

    [Header("Mood Sprites")]
    [SerializeField] private Sprite[] moodSprites; // Happy, Neutral, Annoyed, Angry

    private Guest currentGuest;

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

    private void Start()
    {
        SetupUI();
    }

    private void SetupUI()
    {
        if (guestInfoPanel != null)
            guestInfoPanel.SetActive(false);

        if (closeButton != null)
            closeButton.onClick.AddListener(CloseGuestInfo);

        // Create UI elements if they don't exist
        CreateUIIfMissing();
    }

    private void CreateUIIfMissing()
    {
        if (guestInfoPanel == null)
        {
            CreateGuestInfoPanel();
        }
    }

    private void CreateGuestInfoPanel()
    {
        // Create a simple guest info panel programmatically
        GameObject canvas = GameObject.Find("Canvas");
        if (canvas == null)
        {
            GameObject canvasObj = new GameObject("Canvas");
            canvas = canvasObj;
            canvas.AddComponent<Canvas>();
            canvas.AddComponent<CanvasScaler>();
            canvas.AddComponent<GraphicRaycaster>();
            canvas.GetComponent<Canvas>().renderMode = RenderMode.ScreenSpaceOverlay;
        }

        guestInfoPanel = new GameObject("Guest Info Panel");
        guestInfoPanel.transform.SetParent(canvas.transform, false);

        RectTransform panelRect = guestInfoPanel.AddComponent<RectTransform>();
        panelRect.anchorMin = new Vector2(0.1f, 0.1f);
        panelRect.anchorMax = new Vector2(0.9f, 0.9f);
        panelRect.offsetMin = Vector2.zero;
        panelRect.offsetMax = Vector2.zero;

        Image panelImage = guestInfoPanel.AddComponent<Image>();
        panelImage.color = new Color(0, 0, 0, 0.8f);

        guestInfoPanel.SetActive(false);
    }

    public void ShowGuestInfo(Guest guest)
    {
        if (guest == null || guestInfoPanel == null) return;

        currentGuest = guest;
        guestInfoPanel.SetActive(true);

        UpdateGuestInfo();
    }

    public void CloseGuestInfo()
    {
        if (guestInfoPanel != null)
            guestInfoPanel.SetActive(false);

        currentGuest = null;
    }

    private void Update()
    {
        // Update info if panel is open and we have a guest
        if (currentGuest != null && guestInfoPanel != null && guestInfoPanel.activeSelf)
        {
            UpdateGuestInfo();
        }
    }

    private void UpdateGuestInfo()
    {
        if (currentGuest == null) return;

        // Update basic info
        if (guestNameText != null)
            guestNameText.text = currentGuest.GuestName;

        if (guestTypeText != null)
            guestTypeText.text = $"Type: {currentGuest.Type}";

        if (guestStateText != null)
            guestStateText.text = $"State: {currentGuest.CurrentState}";

        // Update mood
        if (moodImage != null && moodSprites != null && moodSprites.Length > (int)currentGuest.CurrentMood)
        {
            moodImage.sprite = moodSprites[(int)currentGuest.CurrentMood];
        }

        // Update satisfaction
        if (satisfactionText != null)
        {
            float satisfaction = currentGuest.SatisfactionLevel;
            satisfactionText.text = $"Satisfaction: {satisfaction:P0}";

            // Color code satisfaction
            if (satisfaction > 0.7f)
                satisfactionText.color = Color.green;
            else if (satisfaction < 0.4f)
                satisfactionText.color = Color.red;
            else
                satisfactionText.color = Color.yellow;
        }

        // Update patience
        if (patienceText != null)
        {
            float patience = currentGuest.Patience;
            patienceText.text = $"Patience: {patience:F0}%";

            // Color code patience
            if (patience > 70f)
                patienceText.color = Color.green;
            else if (patience < 30f)
                patienceText.color = Color.red;
            else
                patienceText.color = Color.yellow;
        }

        // Update wishes
        UpdateWishesList();

        // Update mood reasons
        UpdateMoodReasonsList();
    }

    private void UpdateWishesList()
    {
        if (wishesContainer == null || currentGuest == null) return;

        // Clear existing wishes
        foreach (Transform child in wishesContainer)
        {
            Destroy(child.gameObject);
        }

        // Add current wishes
        foreach (var wish in currentGuest.Wishes)
        {
            CreateWishItem(wish);
        }
    }

    private void CreateWishItem(GuestWish wish)
    {
        GameObject wishItem;

        if (wishItemPrefab != null)
        {
            wishItem = Instantiate(wishItemPrefab, wishesContainer);
        }
        else
        {
            // Create simple wish item
            wishItem = new GameObject("Wish Item");
            wishItem.transform.SetParent(wishesContainer);

            Text wishText = wishItem.AddComponent<Text>();
            wishText.font = Resources.GetBuiltinResource<Font>("Arial.ttf");
            wishText.fontSize = 14;
        }

        Text textComponent = wishItem.GetComponent<Text>();
        if (textComponent != null)
        {
            string fulfillmentStatus = wish.isFulfilled ? "✓" : "✗";
            textComponent.text = $"{fulfillmentStatus} {wish.wishType} (Importance: {wish.importance:P0})";
            textComponent.color = wish.isFulfilled ? Color.green : Color.white;
        }
    }

    private void UpdateMoodReasonsList()
    {
        if (moodReasonsContainer == null || currentGuest == null) return;

        // Clear existing reasons
        foreach (Transform child in moodReasonsContainer)
        {
            Destroy(child.gameObject);
        }

        // Add recent mood reasons
        foreach (string reason in currentGuest.MoodReasons)
        {
            CreateMoodReasonItem(reason);
        }
    }

    private void CreateMoodReasonItem(string reason)
    {
        GameObject reasonItem;

        if (moodReasonPrefab != null)
        {
            reasonItem = Instantiate(moodReasonPrefab, moodReasonsContainer);
        }
        else
        {
            // Create simple reason item
            reasonItem = new GameObject("Mood Reason Item");
            reasonItem.transform.SetParent(moodReasonsContainer);

            Text reasonText = reasonItem.AddComponent<Text>();
            reasonText.font = Resources.GetBuiltinResource<Font>("Arial.ttf");
            reasonText.fontSize = 12;
            reasonText.color = Color.gray;
        }

        Text textComponent = reasonItem.GetComponent<Text>();
        if (textComponent != null)
        {
            textComponent.text = reason;
        }
    }

    #region Static Helper Methods
    public static void ShowGuestInfoStatic(Guest guest)
    {
        if (Instance != null)
        {
            Instance.ShowGuestInfo(guest);
        }
    }

    public static void CloseGuestInfoStatic()
    {
        if (Instance != null)
        {
            Instance.CloseGuestInfo();
        }
    }
    #endregion
}