//
//  Copyright RevenueCat Inc. All Rights Reserved.
//
//  Licensed under the MIT License (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//      https://opensource.org/licenses/MIT
//
//  ErrorDisplay.swift
//
//  Created by Nacho Soto on 7/21/23.

import SwiftUI

/// A modifier that allows easily displaying an `NSError` as an `alert`.
@available(iOS 15.0, macOS 12.0, tvOS 15.0, watchOS 8.0, *)
struct ErrorDisplay: ViewModifier {

    @Binding
    var error: NSError?
    var onDismiss: (() -> Void)?

    func body(content: Content) -> some View {
        content
            .alert(isPresented: self.isShowingError, error: self.error.map(LocalizedAlertError.init)) { _ in
                Button {
                    self.error = nil

                    self.onDismiss?()
                } label: {
                    Text("OK", bundle: .module)
                }
            } message: { error in
                Text(error.failureReason ?? "")
            }
    }

    private var isShowingError: Binding<Bool> {
        return .init {
            self.error != nil
        } set: { newValue in
            if !newValue {
                self.error = nil
            }
        }
    }

}

@available(iOS 15.0, macOS 12.0, tvOS 15.0, watchOS 8.0, *)
extension View {

    func displayError(_ error: Binding<NSError?>, onDismiss: (() -> Void)? = nil) -> some View {
        self.modifier(ErrorDisplay(error: error, onDismiss: onDismiss))
    }

}