//
//  NewChatButton.swift
//  SimpleX
//
//  Created by Evgeny Poberezkin on 31/01/2022.
//  Copyright © 2022 SimpleX Chat. All rights reserved.
//

import SwiftUI

struct NewChatButton: View {
    @State private var showAddChat = false
    @State private var addContact = false
    @State private var connReqInvitation: String = ""
    @State private var connectContact = false
    @State private var createGroup = false

    var body: some View {
        Button { showAddChat = true } label: {
            Image(systemName: "person.crop.circle.badge.plus")
        }
        .confirmationDialog("Start new chat", isPresented: $showAddChat, titleVisibility: .visible) {
            Button("Add contact") { addContactAction() }
            Button("Scan QR code") { connectContact = true }
            Button("Create group") { createGroup = true }
                .disabled(true)
        }
        .sheet(isPresented: $addContact, content: {
            AddContactView(connReqInvitation: connReqInvitation)
        })
        .sheet(isPresented: $connectContact, content: {
            connectContactSheet()
        })
        .sheet(isPresented: $createGroup, content: { CreateGroupView() })
    }

    func addContactAction() {
        do {
            connReqInvitation = try apiAddContact()
            addContact = true
        } catch {
            DispatchQueue.global().async {
                connectionErrorAlert(error)
            }
            logger.error("NewChatButton.addContactAction apiAddContact error: \(error.localizedDescription)")
        }
    }
    
    func addContactSheet() -> some View {
        AddContactView(connReqInvitation: connReqInvitation)
    }

    func connectContactSheet() -> some View {
        ConnectContactView(completed: { err in
            connectContact = false
            DispatchQueue.global().async {
                switch (err) {
                case let .success(ok):
                    if ok { connectionReqSentAlert(.invitation) }
                case let .failure(error):
                    connectionErrorAlert(error)
                }
            }
        })
    }

    func connectionErrorAlert(_ error: Error) {
        AlertManager.shared.showAlertMsg(title: "Connection error", message: "Error: \(error.localizedDescription)")
    }
}

enum ConnReqType: Equatable {
    case contact
    case invitation
}

func connectionReqSentAlert(_ type: ConnReqType) {
    AlertManager.shared.showAlertMsg(
        title: "Connection request sent!",
        message: type == .contact
            ? "You will be connected when your connection request is accepted, please wait or check later!"
            : "You will be connected when your contact's device is online, please wait or check later!"
    )
}

struct NewChatButton_Previews: PreviewProvider {
    static var previews: some View {
        NewChatButton()
    }
}