//
//  ContentView.swift
//  Toolbar
//
//  Created by Tobias on 16.12.20.
//

import SwiftUI

struct ContentView: View {
    enum Selection: String {
        case First
    }

    @State private var selection: Selection? = .First

    var body: some View {
        NavigationView {
            List {
                NavigationLink(
                    destination: DetailsView(),
                    tag: Selection.First,
                    selection: $selection
                ) {
                    Text("First")
                }
            }
            .listStyle(SidebarListStyle())
        }
    }
}

struct DetailsView: View {
    @State private var displayAdd = false
    @State private var message = "Initial Message"

    var body: some View {
        Text(message)
            .toolbar {
                ToolbarItem(placement: .primaryAction) {
                    Button("Add") {
                        self.displayAdd = true
                    }
                }
            }
            .sheet(isPresented: $displayAdd) {
                SheetView(completion: didFinish)
            }
    }

    func didFinish(_ result: SheetView.Result) {
        displayAdd = false
        
        switch result {
            case .Success:
                message = "Success"
            default:
                message = "Cancelled"
        }
    }
}

struct SheetView: View {
    typealias Completion = (Result) -> Void

    enum Result {
        case Cancel
        case Success
    }
    
    private var completion: Completion

    init(completion: @escaping Completion) {
        self.completion = completion
    }

    var body: some View {
        Text("Modal Sheet")
            .toolbar {
                ToolbarItem(placement: .confirmationAction) {
                    Button("Done") {
                        completion(.Success)
                    }
                }

                ToolbarItem(placement: .destructiveAction) {
                    Button("Cancel") {
                        completion(.Cancel)
                    }
                }
            }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}