PaymentsRestoreWalletSplashViewController.swift

//
// Copyright 2021 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
//

import SignalServiceKit
public import SignalUI

public protocol PaymentsRestoreWalletDelegate: AnyObject {
    func restoreWalletDidComplete()
}

// MARK: -

public class PaymentsRestoreWalletSplashViewController: OWSViewController {

    private weak var restoreWalletDelegate: PaymentsRestoreWalletDelegate?

    public init(restoreWalletDelegate: PaymentsRestoreWalletDelegate) {
        self.restoreWalletDelegate = restoreWalletDelegate

        super.init()
    }

    override public func viewDidLoad() {
        super.viewDidLoad()

        title = OWSLocalizedString(
            "SETTINGS_PAYMENTS_RESTORE_WALLET_TITLE",
            comment: "Title for the 'restore payments wallet' view of the app settings.",
        )

        OWSTableViewController2.removeBackButtonText(viewController: self)

        navigationItem.leftBarButtonItem = UIBarButtonItem(
            barButtonSystemItem: .done,
            target: self,
            action: #selector(didTapDismiss),
            accessibilityIdentifier: "dismiss",
        )
        createContents()
    }

    override public func themeDidChange() {
        super.themeDidChange()

        updateContents()
    }

    private let rootView = UIStackView()

    private func createContents() {

        rootView.axis = .vertical
        rootView.alignment = .fill
        view.addSubview(rootView)
        rootView.autoPin(toTopLayoutGuideOf: self, withInset: 0)
        rootView.autoPin(toBottomLayoutGuideOf: self, withInset: 0)
        rootView.autoPinWidthToSuperviewMargins()

        updateContents()
    }

    private func updateContents() {

        let backgroundColor = OWSTableViewController2.tableBackgroundColor(isUsingPresentedStyle: true)
        view.backgroundColor = backgroundColor

        let heroImage = UIImageView(image: UIImage(named: "recovery-phrase"))

        let titleLabel = UILabel()
        titleLabel.text = OWSLocalizedString(
            "SETTINGS_PAYMENTS_RESTORE_WALLET_SPLASH_TITLE",
            comment: "Title for the first step of the 'restore payments wallet' views.",
        )
        titleLabel.font = UIFont.dynamicTypeTitle2Clamped.semibold()
        titleLabel.textColor = Theme.primaryTextColor
        titleLabel.textAlignment = .center

        let explanationLabel = PaymentsViewUtils.buildTextWithLearnMoreLinkTextView(
            text: OWSLocalizedString(
                "SETTINGS_PAYMENTS_RESTORE_WALLET_SPLASH_EXPLANATION",
                comment: "Explanation of the 'restore payments wallet' process payments settings.",
            ),
            font: .dynamicTypeSubheadlineClamped,
            learnMoreUrl: URL.Support.Payments.walletRestorePassphrase,
        )
        explanationLabel.textAlignment = .center

        let topStack = UIStackView(arrangedSubviews: [
            heroImage,
            UIView.spacer(withHeight: 20),
            titleLabel,
            UIView.spacer(withHeight: 10),
            explanationLabel,
        ])
        topStack.axis = .vertical
        topStack.alignment = .center
        topStack.isLayoutMarginsRelativeArrangement = true
        topStack.layoutMargins = UIEdgeInsets(hMargin: 20, vMargin: 0)

        let pasteFromPasteboardButton = OWSFlatButton.button(
            title: OWSLocalizedString(
                "SETTINGS_PAYMENTS_RESTORE_WALLET_PASTE_FROM_PASTEBOARD",
                comment: "Label for the 'restore passphrase from pasteboard' button in the 'restore payments wallet from passphrase' view.",
            ),
            font: UIFont.dynamicTypeHeadline,
            titleColor: .ows_accentBlue,
            backgroundColor: backgroundColor,
            target: self,
            selector: #selector(didTapPasteFromPasteboardButton),
        )
        pasteFromPasteboardButton.autoSetHeightUsingFont()

        let enterManuallyButton = OWSFlatButton.button(
            title: OWSLocalizedString(
                "SETTINGS_PAYMENTS_RESTORE_WALLET_ENTER_MANUALLY",
                comment: "Label for the 'enter passphrase manually' button in the 'restore payments wallet from passphrase' view.",
            ),
            font: UIFont.dynamicTypeHeadline,
            titleColor: .white,
            backgroundColor: .ows_accentBlue,
            target: self,
            selector: #selector(didTapEnterManuallyButton),
        )
        enterManuallyButton.autoSetHeightUsingFont()

        let spacerFactory = SpacerFactory()

        rootView.removeAllSubviews()
        rootView.addArrangedSubviews([
            spacerFactory.buildVSpacer(),
            topStack,
            spacerFactory.buildVSpacer(),
            pasteFromPasteboardButton,
            UIView.spacer(withHeight: 8),
            enterManuallyButton,
            UIView.spacer(withHeight: 8),
        ])

        spacerFactory.finalizeSpacers()
    }

    // MARK: - Events

    @objc
    private func didTapDismiss() {
        dismiss(animated: true, completion: nil)
    }

    @objc
    private func didTapPasteFromPasteboardButton() {
        guard let restoreWalletDelegate else {
            owsFailDebug("Missing restoreWalletDelegate.")
            dismiss(animated: true, completion: nil)
            return
        }
        let view = PaymentsRestoreWalletPasteboardViewController(restoreWalletDelegate: restoreWalletDelegate)
        navigationController?.pushViewController(view, animated: true)
    }

    @objc
    private func didTapEnterManuallyButton() {
        guard let restoreWalletDelegate else {
            owsFailDebug("Missing restoreWalletDelegate.")
            dismiss(animated: true, completion: nil)
            return
        }
        // Start by entering the first word of the partial passphrase.
        let view = PaymentsRestoreWalletWordViewController(
            restoreWalletDelegate: restoreWalletDelegate,
            partialPassphrase: PartialPaymentsPassphrase.empty,
            wordIndex: 0,
        )
        navigationController?.pushViewController(view, animated: true)
    }
}