/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 */

import React, { Component } from 'react';
import { AppRegistry, CameraRoll, StyleSheet, Text, View, Image, Alert, TouchableOpacity } from 'react-native';
import Spinner from 'react-native-gifted-spinner';
import ImageResizer from 'react-native-image-resizer';

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  },
  welcome: {
    fontSize: 20,
    textAlign: 'center',
    margin: 10,
  },
  instructions: {
    textAlign: 'center',
    color: '#333333',
    marginBottom: 5,
  },
  image: {
    width: 250,
    height: 250,
  },
  resizeButton: {
    color: '#333333',
    fontWeight: 'bold',
    marginBottom: 5,
  },
});

export default class ResizerExample extends Component {
  constructor() {
    super();

    this.state = {
      resizedImageUri: '',
      loading: true,
    };
  }

  componentDidMount() {
    CameraRoll.getPhotos({ first: 1 })
      .then(photos => {
        if (!photos.edges || photos.edges.length === 0) {
          return Alert.alert(
            'Unable to load camera roll',
            'Check that you authorized the access to the camera roll photos and that there is at least one photo in it'
          );
        }

        this.setState({
          image: photos.edges[0].node.image,
        });
      })
      .catch(() => {
        return Alert.alert(
          'Unable to load camera roll',
          'Check that you authorized the access to the camera roll photos'
        );
      });
  }

  resize() {
    ImageResizer.createResizedImage(this.state.image.uri, 8, 6, 'JPEG', 80)
      .then(({ uri }) => {
        this.setState({
          resizedImageUri: uri,
        });
      })
      .catch(err => {
        console.log(err);
        return Alert.alert('Unable to resize the photo', 'Check the console for full the error message');
      });
  }

  render() {
    return (
      <View style={styles.container}>
        <Text style={styles.welcome}>Image Resizer example</Text>
        <Text style={styles.instructions}>This is the original image:</Text>
        {this.state.image ? <Image style={styles.image} source={{ uri: this.state.image.uri }} /> : <Spinner />}
        <Text style={styles.instructions}>Resized image:</Text>
        <TouchableOpacity onPress={() => this.resize()}>
          <Text style={styles.resizeButton}>Click me to resize the image</Text>
        </TouchableOpacity>
        {this.state.resizedImageUri ? (
          <Image style={styles.image} source={{ uri: this.state.resizedImageUri }} />
        ) : null}
      </View>
    );
  }
}