import { Button, View, Text } from 'react-native';
import { NavigationContainer } from '@react-navigation/native';
import { createNativeStackNavigator } from '@react-navigation/native-stack';

function HomeScreen({ navigation }) {
  return (
    <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
      <Text>Minőség</Text>
      <Button
        title="Kezdés"
        onPress={() => navigation.navigate('Subject')}
      />
    </View>
  );
}

function SubjectScreen({ navigation }) {
  return (
    <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
      <Button
        title="Tanárok"
        onPress={() => navigation.navigate('Teacher')}
      />
      <Button title="Vissza" onPress={() => navigation.goBack()} />
    </View>
  );
}

function TeacherScreen({ navigation }) {
  return (
    <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
      <Button
        title="Kérdések"
        onPress={() => navigation.navigate('Questions')}
      />
      <Button title="Vissza" onPress={() => navigation.goBack()} />
    </View>
  );
}

function QuestionsScreen({ navigation }) {
  return (
    <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
      <Button title="Vissza" onPress={() => navigation.goBack()} />
    </View>
  );
}

const Stack = createNativeStackNavigator();

function QualityStack() {
  return (
    <Stack.Navigator>      
      <Stack.Screen name="Home" component={HomeScreen} />
      <Stack.Screen name="Teacher" component={TeacherScreen} />
      <Stack.Screen name="Subject" component={SubjectScreen} />
      <Stack.Screen name="Questions" component={QuestionsScreen} />
    </Stack.Navigator>
  );
}

export default function App() {
  return (
    <NavigationContainer>
      <QualityStack />
    </NavigationContainer>
  );
}