// Filename	: NPCShopDetailPanel.cs
// Creator	: Converted from C++ EC_Shop
// Date		: 2024

using UnityEngine;
using UnityEngine.UI;
using TMPro;
using PerfectWorld.Scripts.Shop;
using BrewMonster.Scripts.Managers;
using BrewMonster.Network;
using CSNetwork.C2SCommand;

public class NPCShopDetailPanel : MonoBehaviour
{
    [Header("UI Components")]
    public TextMeshProUGUI itemNameText;
    public TextMeshProUGUI itemDescriptionText;
    public Image itemIconImage;
    public TextMeshProUGUI itemPriceText;
    
    [Header("Action Buttons")]
    public Button closeButton;
    public Button buyButton;
    
    private GShopItem currentItem;
    private NPCShopUIManager shopManager;
    
    void Start()
    {
        SetupEventListeners();
    }
    
    void SetupEventListeners()
    {
        if (closeButton != null)
            closeButton.onClick.AddListener(OnCloseClicked);
        
        if (buyButton != null)
            buyButton.onClick.AddListener(OnBuyButtonClicked);
    }
    
    public void SetupDetailPanel(GShopItem item, NPCShopUIManager manager)
    {
        currentItem = item;
        shopManager = manager;
        
        UpdateDisplay();
    }
    
    void UpdateDisplay()
    {
        if (currentItem.id == 0)
        {
            Debug.LogWarning("[NPCShopDetailPanel] Current item ID is 0, skipping display update");
            return;
        }
        
        // Set item name
        if (itemNameText != null)
            itemNameText.text = currentItem.name;
        
        // Set item description
        if (itemDescriptionText != null)
        {
            string description = GetItemDescription((int)currentItem.id);
            itemDescriptionText.text = description;
        }
        
        // Set price (use first available price)
        uint price = 0;
        if (currentItem.buy != null && currentItem.buy.Length > 0)
        {
            for (int i = 0; i < currentItem.buy.Length; i++)
            {
                if (currentItem.buy[i].price > 0)
                {
                    price = currentItem.buy[i].price;
                    break;
                }
            }
        }
        
        if (itemPriceText != null)
            itemPriceText.text = price > 0 ? $"Price: {price}" : "Price: N/A";
        
        // Load icon
        if (itemIconImage != null)
        {
            LoadItemIcon(itemIconImage, (int)currentItem.id);
        }
    }
    
    void LoadItemIcon(Image iconImage, int itemId)
    {
        if (itemId <= 0 || iconImage == null)
            return;
        
        // Ensure the Image component is enabled and properly configured
        iconImage.enabled = true;
        iconImage.preserveAspect = true;
        iconImage.type = Image.Type.Simple;
        
        // Use the existing icon loading system from EC_IvtrItemUtils
        Sprite iconSprite = EC_IvtrItemUtils.Instance.ResolveItemIconSprite(itemId);
        
        if (iconSprite != null)
        {
            iconImage.sprite = iconSprite;
            iconImage.color = Color.white;
        }
        else
        {
            iconImage.sprite = null;
        }
    }
    
        string GetItemDescription(int itemId)
    {
        // First check if description is already in the item data
        if (!string.IsNullOrEmpty(currentItem.desc))
        {
            return currentItem.desc;
        }

            // Otherwise, build description using the same central pipeline as inventory:
            try
            {
                EC_IvtrItem item = EC_IvtrItem.CreateItem(itemId, 0, 1);
                if (item != null)
                {
                    // For NPC shop, we typically have static data only, so load from local DB
                    item.GetDetailDataFromLocal();
                    string description = item.GetDesc();
                    if (!string.IsNullOrEmpty(description))
                    {
                        return description.Replace("\\r", "\n");
                    }
                }
            }
            catch (System.Exception ex)
            {
                Debug.LogWarning($"[NPCShopDetailPanel] Failed to get description for item {itemId}: {ex.Message}");
            }

            return "No description available.";
    }
    
    void OnCloseClicked()
    {
        gameObject.SetActive(false);
    }

    void OnBuyButtonClicked()
    {
        if (currentItem.id == 0)
        {
            Debug.LogWarning("[NPCShopDetailPanel] Cannot buy item with ID 0");
            return;
        }

        // Get price from item
        uint price = 0;
        if (currentItem.buy != null && currentItem.buy.Length > 0)
        {
            for (int i = 0; i < currentItem.buy.Length; i++)
            {
                if (currentItem.buy[i].price > 0)
                {
                    price = currentItem.buy[i].price;
                    break;
                }
            }
        }

        // Create npc_trade_item array for buying from NPC
        // The tid is the item template ID, index is shop item index (0 for now), count is quantity to buy
        npc_trade_item[] items = new npc_trade_item[1];
        items[0] = new npc_trade_item
        {
            tid = (int)currentItem.id,
            index = 0, // Shop item index - may need to be determined from shop item position
            count = 1  // Quantity to buy
        };

        // Send the buy command
        UnityGameSession.c2s_CmdNPCSevBuy(1, items);
        
        Debug.Log($"[NPCShopDetailPanel] Sent buy command for item {currentItem.id}, price {price}");
    }
    
    void OnDestroy()
    {
        // Clean up event listeners
        if (closeButton != null)
            closeButton.onClick.RemoveListener(OnCloseClicked);
        
        if (buyButton != null)
            buyButton.onClick.RemoveListener(OnBuyButtonClicked);
    }
}