import SwiftUI
import CoreBluetooth

struct ContentView: View {
    @StateObject var bleManager = BLEManager()
    @State var selectedPeripheral: CBPeripheral?
    @State var showPeriSearch = false
    @State var loaded: NetworkSettings?
    var body: some View {
        NavigationView{
            VStack{
                if(selectedPeripheral == nil){
                    Text("Es wurde noch kein LovePi ausgewählt!")
                }else if(loaded != nil){
                    Form{
                        Section(header: Text("Netzwerkeinstellungen")){
                            HStack{
                                Text("WiFi-Name")
                                Spacer()
                                Text(bleManager.settingData!.ssid)
                            }
                            HStack{
                                Text("WiFi-Passwort")
                                Spacer()
                                Text(bleManager.settingData!.psk)
                            }
                        }
                    }
                }else{
                    Button("Laden...", action: {
                        loaded = bleManager.settingData
                    })
                }
            }
            .navigationTitle("LovePi")
            .toolbar{
                ToolbarItem(placement: .navigationBarTrailing){
                    Button("Suchen", action: {
                        showPeriSearch = true
                    })
                }
            }
            .sheet(isPresented: $showPeriSearch, onDismiss: {bleManager.stopScanning();dismissed()}){
                NavigationView{
                    List(bleManager.peripherals, id: \.name){peri in
                        Button(action:{
                            selectedPeripheral = peri
                            showPeriSearch = false
                        }){
                            VStack{
                                Text(peri.name ?? "Unbenannt")
                                if(peri.services != nil){
                                    VStack{
                                        ForEach(peri.services!, id: \.self){service in
                                            Text(service.uuid.uuidString)
                                        }
                                    }
                                }
                            }
                        }
                    }
                    .navigationTitle("LovePi auswählen")
                    .navigationBarTitleDisplayMode(.inline)
                    .onAppear(perform: {
                        bleManager.startScanning()
                    })
                }
            }
        }
    }

    func dismissed(){
        if(selectedPeripheral != nil){
            print("Discover devices")
            bleManager.connect(peripheral: selectedPeripheral!)
        }
    }
}