eqn.ios/Sources/Earthquake Network/Controllers/InApp/SubscriptionDetailViewController.swift

//
//  SubscriptionDetailViewController.swift
//  Earthquake Network
//
//  Created by Busi Andrea on 29/07/2020.
//  Copyright © 2020 Earthquake Network. All rights reserved.
//

import UIKit
import SafariServices
import StoreKit


class SubscriptionDetailViewController: UIViewController {

    /// Enable this allows shake to enable the current subscription
    private static let ShakeToEnableSubscription = false
    
    var product: SKProduct? {
        didSet {
            updateUI()
        }
    }

    @IBOutlet private weak var containerView: UIView!
    @IBOutlet private weak var productTitleLabel: UILabel!
    @IBOutlet private weak var productImageView: UIImageView!
    @IBOutlet private weak var productDescriptionLabel: UILabel!
    @IBOutlet private weak var subscriptionDetailsLabel: UILabel!
    @IBOutlet private weak var openPrivacyButton: UIButton!
    @IBOutlet private weak var openTermsButton: UIButton!
    @IBOutlet private weak var purchaseRecapLabel: UILabel!
    @IBOutlet private weak var productPriceLabel: UILabel!
    @IBOutlet private weak var purchaseButton: UIButton!

    
    // MARK: - View Lifecycle
    
    override func viewDidLoad() {
        super.viewDidLoad()

        NotificationCenter.default.addObserver(self, selector: #selector(handlePurchaseNotification(_:)),
                                               name: .EQNInAppPurchaseDidComplete,
                                               object: nil)
        
        updateUI()
        setupUI()
    }
    
    // MARK: - Private
    
    private func setupUI() {
        containerView.eqn_applyShadowAndRoundedCorners()
    }
    
    private func updateUI() {
        guard let product = product, isViewLoaded else { return }
        
        productImageView.image = VersioneProProducts.image(for: product.productIdentifier)
        productTitleLabel.text = product.localizedTitle
        productDescriptionLabel.text = product.localizedDescription
        
        var purchaseRecapString = ""
        var subscriptionDetailsString = ""
        switch product.productIdentifier {
        case VersioneProProducts.Identifier.Subscription10kMonthly,
             VersioneProProducts.Identifier.Subscription100kMonthly:
            purchaseRecapString = "inapp_monthly_payment"
            subscriptionDetailsString = "inapp_detail_description"
        case VersioneProProducts.Identifier.Subscription100kYearly,
             VersioneProProducts.Identifier.Subscription100kYearlyDiscounted,
             VersioneProProducts.Identifier.Subscription10kYearly,
             VersioneProProducts.Identifier.Subscription10kYearlyDiscounted:
            purchaseRecapString = "inapp_yearly_payment"
            subscriptionDetailsString = "inapp_detail_description"
        case VersioneProProducts.Identifier.Subscription10kPerpetual,
             VersioneProProducts.Identifier.Subscription100kPerpetual:
            purchaseRecapString = "inapp_lifetime_payment"
            subscriptionDetailsString = "inapp_lifetime_detail_description"
        default:
            break
        }
        
        subscriptionDetailsLabel.text = NSLocalizedString(subscriptionDetailsString, comment: "")
        openPrivacyButton.setTitle(NSLocalizedString("network_pro_privacy_disclaimer", comment: ""), for: .normal)
        openTermsButton.setTitle(NSLocalizedString("network_pro_terms_conditions", comment: ""), for: .normal)
        
        purchaseRecapLabel.text = "\(product.localizedDescription), \(NSLocalizedString(purchaseRecapString, comment: ""))"
        
        priceFormatter.locale = product.priceLocale
        productPriceLabel.text = priceFormatter.string(from: product.price)
        purchaseButton.setTitle(NSLocalizedString("inapp_purchase", comment: ""), for: .normal)
    }
    
    // MARK: - Notifications
    
    @objc func handlePurchaseNotification(_ notification: Notification) {
        navigationController?.popViewController(animated: true)
    }
    
    // MARK: - Actions
    
    @IBAction func openExternalLinkTapped(_ sender: UIButton) {
        var linkUrl: URL?
        if sender == openPrivacyButton {
            linkUrl = URL(string: "\(EQNWebsiteAddress)/privacy/")
        } else if sender == openTermsButton {
            linkUrl = URL(string: "\(EQNWebsiteAddress)/terms-conditions/")

        }
        
        if let url = linkUrl {
            let controller = SFSafariViewController(url: url)
            present(controller, animated: true, completion: nil)
        }
    }
    
    @IBAction func subscribeTapped(_ sender: UIButton) {
        guard let product = product else { return }
        
        VersioneProProducts.store.buyProduct(product)
    }
    
    // MARK: - Helper
    
    private var priceFormatter: NumberFormatter = {
        let formatter = NumberFormatter()
        formatter.formatterBehavior = .behavior10_4
        formatter.numberStyle = .currency
        return formatter
    }()
}


extension SubscriptionDetailViewController {
    override func motionEnded(_ motion: UIEvent.EventSubtype, with event: UIEvent?) {
        guard let product = product, event?.subtype == .motionShake, Self.ShakeToEnableSubscription else {
            return
        }
         
        let alert = UIAlertController(title: "🧑‍💻", message: "Please select an action", preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "Reset all purchases", style: .default) { action in
            EQNPurchaseUtility.resetInAppPurchases()
        })
        alert.addAction(UIAlertAction(title: "Activate this subscription", style: .default) { action in
            EQNPurchaseUtility.simulateProPurchase(identifier: product.productIdentifier)
        })
        alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
        present(alert, animated: true, completion: nil)
    }
}