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

public class GameShop : MonoBehaviour
{
    [Serializable]
    public class ShopItem
    {
        public Button buyButton;
        public TMP_Text buyLabel;
        public TMP_Text nameLabel;
        public Image iconImage;
        public string id;
        public int price;
    }

    public AgentSettings agentSettings;
    public string shopKey = "Characters";
    public List<ShopItem> items = new();

    public event Action<string> OnPurchaseSuccess;
    public event Action<string> OnPurchaseFail;

    string WalletAddress => PlayerPrefs.GetString("WALLET_ADDRESS", "");

    void Start()
    {
        ApplyCatalogIfPresent();
        EnsureFirstUnlocked();
        RefreshUI();
    }

    void ApplyCatalogIfPresent()
    {
        if (agentSettings == null || agentSettings.Agents == null || agentSettings.Agents.Length == 0)
        {
            for (int i = 0; i < items.Count; i++)
                if (string.IsNullOrWhiteSpace(items[i].id)) items[i].id = $"Item{i + 1}";
            return;
        }

        int count = Mathf.Min(items.Count, agentSettings.Agents.Length);
        for (int i = 0; i < count; i++)
        {
            var a = agentSettings.Agents[i];
            var slot = items[i];
            slot.id = a.ID;
            slot.price = a.Price;
            if (slot.nameLabel) slot.nameLabel.text = string.IsNullOrEmpty(a.DisplayName) ? a.ID : a.DisplayName;
            if (slot.iconImage) slot.iconImage.sprite = a.Icon;
        }
        for (int i = count; i < items.Count; i++)
            if (string.IsNullOrWhiteSpace(items[i].id)) items[i].id = $"Item{i + 1}";
    }

    void EnsureFirstUnlocked()
    {
        if (items.Count == 0) return;
        var id = string.IsNullOrWhiteSpace(items[0].id) ? "Item1" : items[0].id;
        ShopUnlocks.EnsureUnlocked(id, shopKey);
    }

    public void TryBuy(string id)
    {
        int idx = items.FindIndex(s => s.id == id);
        if (idx < 0) return;
        if (ShopUnlocks.IsUnlocked(id, shopKey)) return;
        //if (string.IsNullOrEmpty(WalletAddress))
        //{
        //    OnPurchaseFail?.Invoke(id);
        //    return;
        //}
        StartCoroutine(SimPurchase(idx));
    }
    long currentPrice;
    public async void GetCurrency()
    {
        try
        {
            var rec = await GameDb.GetCurrencyAsync(PlayerPrefs.GetString("WALLET_ADDRESS"));
            currentPrice = rec;
            Debug.Log(rec.ToString());
        }
        catch (System.Exception e)
        {
            Debug.LogError($"[Runtime] ❌ Ensure failed: {e.Message}");
        }
    }
    IEnumerator SimPurchase(int idx)
    {
        yield return new WaitForSeconds(0.6f);
        var id = items[idx].id;
        bool ok = true;
        Debug.Log("CurrentPrice: " + currentPrice);
        if (items[idx].price > currentPrice)
        {
            ok = false;
        }
        if (ok)
        {
            ShopUnlocks.Unlock(id, shopKey);
            RefreshUI();
            OnPurchaseSuccess?.Invoke(id);
        }
        else
        {
            OnPurchaseFail?.Invoke(id);
        }
    }

    void RefreshUI()
    {
        for (int i = 0; i < items.Count; i++)
        {
            var slot = items[i];
            bool owned = !string.IsNullOrWhiteSpace(slot.id) && ShopUnlocks.IsUnlocked(slot.id, shopKey);

            if (slot.buyButton)
            {
                if (i == 0)
                {
                    slot.buyButton.gameObject.SetActive(false);
                }
                else
                {
                    slot.buyButton.onClick.RemoveAllListeners();
                    slot.buyButton.gameObject.SetActive(!owned);
                    if (!owned)
                    {
                        var label = slot.buyLabel ? slot.buyLabel : slot.buyButton.GetComponentInChildren<TMP_Text>(true);
                        if (label) label.text = $"BUY {slot.price}";
                        string captured = slot.id;
                        slot.buyButton.onClick.AddListener(() => TryBuy(captured));
                    }
                }
            }

            //if (slot.lockIcon) slot.lockIcon.SetActive(!owned);
        }
    }

    [ContextMenu("Reset Unlocks")]
    void ResetUnlocks()
    {
        ShopUnlocks.Reset(shopKey);
        EnsureFirstUnlocked();
        RefreshUI();
    }
}