using System;
using System.Collections;
using System.Collections.Generic;
using System.Threading;
using UnityEngine;
using UnityEngine.UI;
using Facebook.Unity;

public class PurchasePage : MonoBehaviour {
  [SerializeField]
  private Button _loadProductsBtn;
  [SerializeField]
  private Button _loadPurchasesBtn;
  [SerializeField]
  private GameObject _productRowPrefab;
  [SerializeField]
  private Transform _productScrollTransform;
  [SerializeField]
  private GameObject _purchaseRowPrefab;
  [SerializeField]
  private Transform _purchaseScrollTransform;

  private LogScroller _logScroller;
  private IList<Product> _products = new List<Product>();

  private void Awake () {
    _logScroller = transform.root.GetComponent<UIState>().logScroller;
  }

  public void CheckReady () {
    LogText("Checking Ready");

    FBGamingServices.OnIAPReady(delegate(IIAPReadyResult result) {
      if (result.Error == null && result.ResultDictionary != null) {
        _loadProductsBtn.interactable = true;
        _loadPurchasesBtn.interactable = true;
        LogText("IAP Ready");
      } else {
        LogText("ERR: IAP not ready" + result.Error.ToString());
      }
    });
  }
  public void ConsumePurchase (Purchase purchase, Action<bool> callback) {
    LogText("Consuming " + purchase.PurchaseToken + " : " + purchase.ProductID);

    callback(true);

    FBGamingServices.ConsumePurchase(purchase.PurchaseToken, delegate (IConsumePurchaseResult result) {
      if (result.Error == null && result.ResultDictionary != null) {
        LogText("Consumed purchase " + purchase.PurchaseToken + " : " + purchase.ProductID);
        callback(true);
      } else {
        LogText(string.Format("ERR: Failed to consume purchase {0} : {1}\n{2}", purchase.PurchaseToken, purchase.ProductID, result.Error.ToString()));
        callback(false);
      }
    });
  }
  public void LoadProducts () {
    LogText("Loading Products");

    foreach (Transform child in _productScrollTransform) {
      Destroy(child.gameObject);
    }

    FBGamingServices.GetCatalog(delegate (ICatalogResult result) {
      if (result.Error == null && result.ResultDictionary != null) {
        _products = result.Products; // nullable?
        LogText(string.Format("Got {0} products", result.Products.Count));

        foreach (Product product in _products) {
          GameObject productRow = Instantiate(_productRowPrefab, _productScrollTransform);
          productRow.GetComponent<ProductRowPrefab>().Initialize(this, _logScroller, product);
        }
      } else {
        LogText(string.Format("ERR: Failed to get products\n{0}", result.Error));
      }
    });
  }
  public void LoadPurchases () {
    LogText("Loading Purchases");

    foreach (Transform child in _purchaseScrollTransform) {
      Destroy(child.gameObject);
    }

    FBGamingServices.GetPurchases(delegate (IPurchasesResult result) {
      if (result.Error == null && result.ResultDictionary != null) {
        LogText(string.Format("Got {0} purchases", result.Purchases.Count));
        foreach (Purchase purchase in result.Purchases) {
          AddPurchase(purchase, false);
        }
      } else {
        LogText("ERR: Failed to get purchases\n" + result.Error);
      }
    });
  }
  public void MakePurchase (Product product) {
    LogText("Purchasing " + product.ProductID);

    FBGamingServices.Purchase(product.ProductID, delegate (IPurchaseResult result) {
      if (result.Error == null && result.ResultDictionary != null) {
        // ConsumePurchase(result.Purchase);
        LogText(string.Format("Purchased {0} | {1}", result.Purchase.ProductID, result.Purchase.PurchaseToken));
        AddPurchase(result.Purchase, true);
      } else if (result.Cancelled) {
        LogText("Cancelled purchase");
      } else {
        LogText(string.Format("ERR: Failed to purchase {0}\n{1}", product.ProductID, result.Error.ToString()));
      }
    });
  }
  public void ToggleShowConsumedClicked (bool show) {
    foreach (Transform child in _purchaseScrollTransform) {
      child.gameObject.SetActive(show);
    }
  }

  // private
  private void AddPurchase (Purchase purchase, bool setToTop) {
    GameObject purchaseRow = Instantiate(_purchaseRowPrefab, _purchaseScrollTransform);
    purchaseRow.GetComponent<PurchaseRowPrefab>().Initialize(this, _logScroller, purchase);
    if (setToTop) {
      purchaseRow.transform.SetSiblingIndex(0);
    }
  }

  private void LogText (string text) {
    _logScroller.Log(text);
  }
}