//
//  SetPrivateKeyViewController.swift
//  Malinka
//
//  Created by Nut.Tech on 29.07.2022.
//

import UIKit
import Combine
import WalletKit

final class SetPrivateKeyViewController: UIViewController {
    
    private enum WalletNavigation {
        case account(WalletKit.Wallet)
    }
    
    @IBOutlet weak var warningView: CommonViewWarning!
    @IBOutlet var headerTitleLabel: UILabel!
    @IBOutlet private weak var submitBtn: CommonButtonAction!
    
    private let accountService = AccountOnboarding.Service.CreateAccount()
    private let iapService = AccountOnboarding.Service.IAP.shared
    
    @IBOutlet var signalView: UIView!
    @IBOutlet var checkboxButton: UIButton!
    @IBOutlet private weak var usernameView: CommonViewCopy!
    @IBOutlet private weak var privateKeyView: CommonViewCopy!
    
    var showCreateManual: Bool!
    var walletService: KeysWalletService!
    
    private var service: UpdateWalletStateService?
    private var refreshSubscription: AnyCancellable?
    
    // MARK: - Lifecycle
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.title = L10n.Account.Onboarding.freeTitle
        self.checkboxButton.setImage(Asset.checkboxOff.image, for: .normal)
        
        self.usernameView.text = self.walletService.walletName
        self.privateKeyView.text = self.walletService.walletPrivateKey
        self.warningView.makeCritical()
        
        self.submitBtn.lzTitle = L10n.Account.Onboarding.Username.create
        self.submitBtn.isEnabled = false
        
        if let navigationController = self.navigationController {
            
            self.navigationItem.leftBarButtonItem = .pop(self)
            
            navigationController.navigationBar.setBackgroundImage(UIImage(), for: .default)
            navigationController.navigationBar.shadowImage = UIImage()
            navigationController.navigationBar.isTranslucent = true
        }
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        
        if Accounts().current != nil,
           self.navigationController == nil {
            self.dismiss(animated: false) 
        }
    }
    
    @IBAction private func onSubmit(_ : AnyObject?) {
        
        if checkboxButton.image(for: .normal) == Asset.checkboxOff.image {
            UIView.animate(withDuration: 0.3, animations: {
                self.signalView.alpha = 1
            })
            DispatchQueue.main.async {
                UIView.animate(withDuration: 0.3, animations: {
                    self.signalView.alpha = 0
                })
            }
            return
        }
        
        Popup.showWithLoader(in: self, with: "account.create.progress".localized)
        
        let service = self.walletService.createService()
        
        AccountViewAuthorize.showGetPassword(in: self) { password in
            self.createWallet(with: service, password: password)
        }
    }
    
    private func createWallet(with service: CreateWalletService, password: String) {
        
        Task {
            
            do {
                
                let service = try await service.create(for: password)
                self.service = service
                
                var newWallet: WalletKit.Wallet?
                self.refreshSubscription = service.statusPublisher
                    .receive(on: DispatchQueue.main)
                    .sink(receiveCompletion: { [weak self] _ in
                        guard let self,
                              let wallet = newWallet else {
                            return
                        }
                        
                        switch wallet.state {
                        case .accepted:
                            self.showErrorPopup(title: "account.create.success.title".localized,
                                                description: "account.create.success.description".localized,
                                                button: "account.create.success.button".localized,
                                                navigate: .account(wallet))
                        case .creating, .pending:
                            self.showErrorPopup(title: "account.create.needMoreTime.title".localized,
                                                description: "account.create.needMoreTime.description".localized,
                                                button: "account.create.needMoreTime.button".localized,
                                                navigate: .account(wallet))
                        case .declined:
                            self.showErrorPopup(title: "account.create.failed.general.title".localized,
                                                description: "account.create.failed.general.description".localized,
                                                button: "account.create.failed.general.button".localized)
                        }
                    }, receiveValue: { wallet in
                        if !newWallet.isExist { newWallet = wallet } 
                    })
                
            } catch WalletError.dailyLimit {
                self.showErrorPopup(title: "account.create.failed.daily.title".localized,
                                    description: "account.create.failed.daily.description".localized,
                                    button: "account.create.failed.daily.button".localized)
            } catch WalletError.deviceLimit {
                self.showErrorPopup(title: "account.create.failed.device.title".localized,
                                    description: "account.create.failed.device.description".localized,
                                    button: "account.create.failed.device.button".localized)
            } catch WalletError.exists {
                self.showErrorPopup(title: "account.create.failed.exists.title".localized,
                                    description: "account.create.failed.exists.description".localized,
                                    button: "account.create.failed.exists.button".localized)
            } catch {
                self.showErrorPopup(title: "account.create.failed.general.title".localized,
                                    description: "account.create.failed.general.description".localized,
                                    button: "account.create.failed.general.button".localized)
            }
            
        }
    }
    
    @IBAction func onGenerateKeyClicked(_ sender: Any) {
        self.walletService.generateKey()
        privateKeyView.text = self.walletService.walletPrivateKey
    }
    
    @IBAction func onUseOwnKeyClicked(_ sender: Any) {
        let view = AccountOnboardingAddPrivateKey()
        view.onSubmit = { key in
            
            self.walletService.update(key: key)
            self.privateKeyView.text = self.walletService.walletPrivateKey
            
            Popup.hide()
            // TODO: - need remove ?? ""
            Popup.show(title: L10n.Account.Onboarding.Keys.Use.Own.added, views: [
                .field(title: L10n.Account.Onboarding.Username.accountNameTitle, text: self.walletService.walletName),
                .field(title: L10n.Account.Onboarding.Keys.Use.Own.privateKeyAdded, text: key.privateKey ?? "") 
            ], submit: L10n.Common.Button.continue, in: self)
        }
        
        Popup.show(content: CommonViewControllerViewPopUp(
            title: L10n.Account.Onboarding.Enter.Private.key,
            description: L10n.Account.Onboarding.Keys.Use.Own.description,
            view: view
        ))
    }
    
    @IBAction func onCheckbox(_ sender: Any) {
        self.signalView.alpha = 0
        if self.checkboxButton.image(for: .normal) == Asset.checkboxOff.image {
            self.checkboxButton.setImage(Asset.checkboxOn.image, for: .normal)
            self.submitBtn.isEnabled = true
        } else {
            self.checkboxButton.setImage(Asset.checkboxOff.image, for: .normal)
            self.submitBtn.isEnabled = false
        }
    }
    
    @IBAction func haveWalletPrssed(_: AnyObject?) {
        let ctrl = UINavigationController(rootViewController: StoryboardScene.Account.manual.instantiate())
        self.navigationController?.pushViewController(ctrl, animated: true)
    }
    
    private func showErrorPopup(title: String, description: String, button: String, navigate: WalletNavigation? = nil) {
        
        let views: [UIView] = [
            .field(text: description, textStyle: "regular_16")
        ]
        
        DispatchQueue.main.async { [weak self] in
            guard let self = self else { return }
            
            Popup.hide(in: self) {
                Popup.show(title: title,
                           views: views,
                           submit: button,
                           submitStyle: .primary, in: self) { ctrl in
                    
                    ctrl.dismiss(animated: true)
                    self.processAccountCreation(navigation: navigate)
                }
            }
        }
    }
    
    private func processAccountCreation(navigation: WalletNavigation?) {
        switch navigation {
        case .account(let wallet):
            self.dismiss(animated: true) { [weak self] in
                guard let self = self else { return }
                let vc = AccountsListController()
                self.mainController.content.push(vc, animated: false)
            }
        default: 
            break
        }
    }
    
}