//
//  UIViewController+Logger.cpp
//  Unity-iPhone
//
//  Created by Hl Zhang on 2023/3/21.
//

#import "UIViewController+Purchase.h"
#import "Utilities.h"
#import "StoreManager.h"
#import "StoreObserver.h"
#import "AppConfiguration.h"
#import <Foundation/Foundation.h>

static Utilities *utility;

@implementation UIViewController (Purchase)

-(void)initPurchaseEnv {
  utility = [[Utilities alloc] init];
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(handleProductRequestNotification:)
                                               name:PCSProductRequestNotification
                                             object:[StoreManager sharedInstance]];
  
  [[NSNotificationCenter defaultCenter] addObserver:self
                                           selector:@selector(handlePurchaseNotification:)
                                               name:PCSPurchaseNotification
                                             object:[StoreObserver sharedInstance]];
}
/// Retrieves product information from the App Store.
-(void)fetchProductInformation {
  // First, let's check whether the user is allowed to make purchases. Proceed if they are allowed. Display an alert, otherwise.
  if ([StoreObserver sharedInstance].isAuthorizedForPayments) {
    NSArray *identifiers = utility.identifiers;
    
    if (identifiers != nil) {
      if (identifiers.count > 0) {
        Section *section = [[Section alloc] initWithName:PCSProductsInvalidIdentifiers elements:identifiers];
        
        // Refresh the UI with identifiers to be queried.
//        [self switchToViewController:ParentViewControllerSegmentProducts];
//        [self.products reloadWithData:[NSMutableArray arrayWithObject:section]];
        
        // Fetch the product information.
        [[StoreManager sharedInstance] startProductRequestWithIdentifiers:identifiers];
      } else {
        // Warn the user that the resource file does not contain anything.
        [self alertWithTitle:PCSMessagesStatus message:[NSString stringWithFormat:@"%@.%@ %@", PCSProductIdsPlistName, PCSProductIdsPlistFileExtension, PCSMessagesEmptyResource]];
      }
    } else {
      // Warn the user that the resource file could not be found.
      [self alertWithTitle:PCSMessagesStatus message:[NSString stringWithFormat:@"%@ %@.%@.", PCSMessagesResourceNotFound, PCSProductIdsPlistName, PCSProductIdsPlistFileExtension]];
    }
  } else {
    // Warn the user that they are not allowed to make purchases.
    [self alertWithTitle:PCSMessagesStatus message:[NSString stringWithFormat:@"%@", PCSMessagesCannotMakePayments]];
  }
  
}

/// Creates and displays an alert.
-(void)alertWithTitle:(NSString *)title message:(NSString *)message {
    UIAlertController *alertController = [utility alertWithTitle:title message:message];
    [self.navigationController presentViewController:alertController animated:YES completion:nil];
}

#pragma mark - Handle PCSProductRequest Notification

/// Updates the UI according to the product request notification result.
-(void)handleProductRequestNotification:(NSNotification *)notification {
    StoreManager *productRequestNotification = (StoreManager*)notification.object;
    PCSProductRequestStatus status = (PCSProductRequestStatus)productRequestNotification.status;
    
    if (status == PCSStoreResponse) {
        // Switch to the Products view controller.
//        [self switchToViewController:ParentViewControllerSegmentProducts];
//        [self.products reloadWithData:productRequestNotification.storeResponse];
//        self.segmentedControl.selectedSegmentIndex = ParentViewControllerSegmentProducts;
    } else if (status == PCSRequestFailed) {
        [self alertWithTitle:PCSMessagesProductRequestStatus message:productRequestNotification.message];
    }
}

#pragma mark - Handle PCSPurchase Notification

/// Updates the UI according to the purchase request notification result.
-(void)handlePurchaseNotification:(NSNotification *)notification {
    StoreObserver *purchasesNotification = (StoreObserver *)notification.object;
    PCSPurchaseStatus status = (PCSPurchaseStatus)purchasesNotification.status;
    
    switch (status) {
        case PCSNoRestorablePurchases:
        case PCSPurchaseFailed:
        case PCSRestoreFailed: [self alertWithTitle:PCSMessagesPurchaseStatus message:purchasesNotification.message];
            break;
            // Switch to the Purchases view when receiving a successful restore notification.
        case PCSRestoreSucceeded: [self handleRestoredSucceededTransaction];
            break;
        default: break;
    }
}

#pragma mark - Handle Restored Transactions

/// Handles succesful restored transactions. Switches to the Purchases view.
-(void)handleRestoredSucceededTransaction {
    utility.restoreWasCalled = YES;
    
    // Refresh the Purchases view with the restored purchases.
//    [self switchToViewController:ParentViewControllerSegmentPurchases];
//    [self.purchases reloadWithData:self.utility.dataSourceForPurchasesUI];
//    self.segmentedControl.selectedSegmentIndex = ParentViewControllerSegmentPurchases;
}
@end