import React, { useState } from 'react';
import { Text, View, StyleSheet, Image } from 'react-native';
import { TextInput, Button, HelperText } from 'react-native-paper';
import API from './../API.js';
import { useNavigation } from '@react-navigation/native';
import i18n from "../i18nMessages.js";


let LoginForm = () => {
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');
  const [error, setError] = useState('');
  const navigation = useNavigation();

  const loginCall = async ()=>{
    let r = await API.logIn(email.trim(), password);
    if (r.status === "ok") return navigation.reset({
        index: 0,
        routes: [{ name: 'MainNavigation' }],
      });
    //console.log(r)
    setError(r.status);
    //alert(i18n.t('message.wrongInformation'))
  };

  return (
    <View style={styles.mainView}>
      <Image
        style={styles.logo}
        source={require('./../assets/icon.png')}
      />
      <Text style={styles.header}>EMI Social</Text>
      <Text >{i18n.t("message.login")}</Text>
      <TextInput
        style={styles.input}
        onChangeText={text => setEmail(text)}
        defaultValue={email}
        placeholder="email"
        label={i18n.t("message.email")}
        autoCapitalize='none'
        autoComplete='email'
        autoCorrect={false}
        mode="outlined"
      />
      {error !== '' && error !== 'incorrect password' ? <HelperText type="error" visible={true}>
        {i18n.t("message.invalidEmail")}
      </HelperText> : <></>}
      <TextInput
        style={styles.input}
        onChangeText={text => setPassword(text)}
        defaultValue={password}
        placeholder="password"
        textContentType="password"
        label={i18n.t("message.password")}
        secureTextEntry={true}
        autoCapitalize='none'
        autoComplete='email'
        autoCorrect={false}
        mode="outlined"
      />
      {error === 'incorrect password' ? <HelperText type="error" visible={true}>
        {i18n.t("message.reviewPassword")}
      </HelperText> : <></>}
      <Button
        style={styles.button}
        onPress={async () => {
          await loginCall();
        }}
      >{i18n.t("message.submit")}</Button>
    </View>
  );
}

export default LoginForm;

const styles = StyleSheet.create({
  mainView: {
    backgroundColor: 'white',
    flex: 1,
    flexDirection: "column",
    justifyContent: "center",
    padding: 15,
    width: "100%",
    alignContent: 'center',
    alignItems: 'center',
  },
  header: {
    fontFamily: 'Helvetica-Bold',
    fontSize: 42,
    textAlign: "left",
    paddingBottom: 15,
    color: '#777',
    alignContent: 'center'
  },
  logo:{
    width: 250, 
    height: 250,
    justifyContent: 'center',
    alignItems: 'center',
  },
  input:{
    backgroundColor: 'white',
    width: "80%"
  },
  button:{
    marginTop: 10,

  }
});