raspberry/iOS/Wallet/Sources/Resources/Controller/Popup/ResourcesControllerPopup.swift

//
//  ResourcesControllerPopup.swift
//  Wallet
//
//  Created by Igor on 11.02.2021.
//  Copyright © 2021 AM. All rights reserved.
//

import UIKit

enum QuotaType: Int {
    case freeTransactions
    case accountResources
}

class ResourcesControllerPopup: UIViewController, ResourcesControllerPopupStatisticsDelegate {
    
    @IBOutlet private var quotasContainerStackView: UIStackView!
    @IBOutlet private weak var quotaView: UIView!
    @IBOutlet private weak var statisticsView: UIView!
    @IBOutlet private weak var selectedResourcesRadioBattonsGroupView: CommonViewRadioGroup?
    
    private let account = Accounts().current?.name

    private var quota: ResourcesControllerPopupQuota { child()! }
    private lazy var statistics: ResourcesControllerPopupStatistics = {
        let vc: ResourcesControllerPopupStatistics = child()!
        vc.delegate = self
        return vc
    }()
    private var quotaType: QuotaType?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.selectedResourcesRadioBattonsGroupView?.collection = [L10n.Resources.Popup.Transactions.title, L10n.Resources.Popup.Statistics.title]

        if let account {
            self.quota.service = .init(account: account)
            self.statistics.service = .init(account: account)
        }
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        self.preload()
    }

    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        self.bag.flush()
    }
    
    func selectQuota(type: QuotaType) {
        if type != self.quotaType {
            self.quotaType = type
        }
        if let radio = self.selectedResourcesRadioBattonsGroupView {
            radio.selectedIndex = type.rawValue   
        }
    }
    
    private func preload() {
        Loader.show(in: self)
        self.quotasContainerStackView.alpha = 0
        let group = DispatchGroup()
        group.enter()
        self.quota.service.fetch { _ in
            group.leave()
        }
        group.enter()
        self.statistics.service.fetch { _ in
            group.leave()
        }
        group.notify(queue: .main) {
            Loader.hide(in: self)
            if let quota = self.quotaType {
                self.selectQuota(type: quota)
            } else {
                self.updateQuotaRadioGroup()
            }
            UIView.animate(withDuration: 0.3) {
                self.quotasContainerStackView.alpha = 1
            }
        }
    }
    
    private func addObserver() {
        Notification.subscribe(bag: self.bag, name: .didUpdateAccountQuota) { [weak self] _ in
            self?.updateQuotaRadioGroup()
        }
    }

    @IBAction func onResourcesSelect(_ sender: Any) {
        let isEnabled = self.selectedResourcesRadioBattonsGroupView?.selectedIndex == 0
        self.quotaType = isEnabled ? .freeTransactions : .accountResources
        Accounts().quota.isEnabled = isEnabled
    }
    
    private func updateQuotaRadioGroup() {
        let quotaType: QuotaType = Accounts().quota.isEnabled ? .accountResources 
                                                              : .freeTransactions
        self.selectQuota(type: quotaType)
    }
    
    internal func sendSubmit() {
        if let type = self.quotaType {
            Accounts().quota.isEnabled = type == .freeTransactions
        }
        self.dismiss(animated: true)
        Popup.hide()
    }
}