import React, { useState } from "react";
import { 
  Text, 
  View, 
  TouchableOpacity, 
  StyleSheet, 
  Dimensions,
} from 'react-native';
import Constants from 'expo-constants';

export default function App() {
  const [count, setCount] = useState(0);  
 
  return (
    <View style={styles.container}>
      <Text
        style={styles.bigNumber}
      >
        {count}
      </Text>
      <TouchableOpacity
        style={styles.button}
        onPress={() => setCount( prevCount => prevCount + 1)}
      >
        <Text>Push Up!</Text>
      </TouchableOpacity>
      
    </View>
  );
}

const windowHeight = Dimensions.get('window').height;
const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: "center",
    // paddingTop: Constants.statusBarHeight,
    backgroundColor: "#ecf0f1",
    padding: 8,
    fontFamily: "System",
  },
  button: {
    alignItems: "center",
    backgroundColor: "#DDDDDD",
    paddingTop: windowHeight/3,
    paddingBottom: windowHeight/3,
  },
  bigNumber: {
    textAlign: "center",
    fontSize: 32,
    fontWeight: 'bold',
    padding: 32,
  },
});