SideStore/SideStoreApp/Sources/SideStoreAppKit/Components/ToastView.swift

//
//  ToastView.swift
//  AltStore
//
//  Created by Riley Testut on 7/19/19.
//  Copyright © 2019 Riley Testut. All rights reserved.
//

import RoxasUIKit
import Shared
import SideStoreCore
import SideKit
import AltSign

extension TimeInterval {
    static let shortToastViewDuration = 4.0
    static let longToastViewDuration = 8.0
}

final class ToastView: RSTToastView {
    var preferredDuration: TimeInterval

    override init(text: String, detailText detailedText: String?) {
        if detailedText == nil {
            preferredDuration = .shortToastViewDuration
        } else {
            preferredDuration = .longToastViewDuration
        }

        super.init(text: text, detailText: detailedText)

        isAccessibilityElement = true

        layoutMargins = UIEdgeInsets(top: 8, left: 16, bottom: 10, right: 16)
        setNeedsLayout()

        if let stackView = textLabel.superview as? UIStackView {
            // RSTToastView does not expose stack view containing labels,
            // so we access it indirectly as the labels' superview.
            stackView.spacing = (detailedText != nil) ? 4.0 : 0.0
        }
    }

    convenience init(error: Error) {
        var error = error as NSError
        var underlyingError = error.underlyingError

        var preferredDuration: TimeInterval?

        if
            let unwrappedUnderlyingError = underlyingError,
            error.domain == AltServerErrorDomain && error.code == -1 //ALTServerError.underlyingError().rawValue
        {
            // Treat underlyingError as the primary error.

            error = unwrappedUnderlyingError as NSError
            underlyingError = nil

            preferredDuration = .longToastViewDuration
        }

        let text: String
        let detailText: String?

        if let failure = error.localizedFailure {
            text = failure
            detailText = error.localizedFailureReason ?? error.localizedRecoverySuggestion ?? underlyingError?.localizedDescription ?? error.localizedDescription
        } else if let reason = error.localizedFailureReason {
            text = reason
            detailText = error.localizedRecoverySuggestion ?? underlyingError?.localizedDescription
        } else {
            text = error.localizedDescription
            detailText = underlyingError?.localizedDescription ?? error.localizedRecoverySuggestion
        }

        self.init(text: text, detailText: detailText)

        if let preferredDuration = preferredDuration {
            self.preferredDuration = preferredDuration
        }
    }

    @available(*, unavailable)
    required init(coder _: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func layoutSubviews() {
        super.layoutSubviews()

        // Rough calculation to determine height of ToastView with one-line textLabel.
        let minimumHeight = textLabel.font.lineHeight.rounded() + 18
        layer.cornerRadius = minimumHeight / 2
    }

    func show(in viewController: UIViewController) {
        show(in: viewController.navigationController?.view ?? viewController.view, duration: preferredDuration)
    }

    override func show(in view: UIView, duration: TimeInterval) {
        super.show(in: view, duration: duration)

        let announcement = (textLabel.text ?? "") + ". " + (detailTextLabel.text ?? "")
        accessibilityLabel = announcement

        // Minimum 0.75 delay to prevent announcement being cut off by VoiceOver.
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.75) {
            UIAccessibility.post(notification: .announcement, argument: announcement)
        }
    }

    override func show(in view: UIView) {
        show(in: view, duration: preferredDuration)
    }
}