import { StatusBar } from 'expo-status-bar';
import { useState } from 'react';
import { StyleSheet, Text, TouchableHighlight, View } from 'react-native';
import { TextInput } from 'react-native';
import Button from './components/Button';

function calcTriangleArea(base, height) {
  return base * height / 2;
}

export default function App() {
  const [base, setBase] = useState('');
  const [height, setHeight] = useState('');
  const [area, setArea] = useState('');
  function startCalc() {
    let result = calcTriangleArea(base, height);
    setArea(result);
  }
  return (
    <View style={styles.container}>
      <Text>Triangle</Text>
      <Text>Háromszög területszámítás</Text>

      <Text>Alap</Text>
      <TextInput
      style={styles.input}
      onChangeText={base => setBase(base)}
      />


      <Text>Magasság</Text>
      <TextInput
      style={styles.input}
      onChangeText={height => setHeight(height)}
      />

      <Button onPress={startCalc} />

      <Text>Terület</Text>
      <Text>{area}</Text>

      <StatusBar style="auto" />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: 'aqua',
    alignItems: 'center',
    justifyContent: 'center',
  },

  input: {
    backgroundColor: 'white',
    height: 30,
  }
});