import React, {Component} from 'react';
import {
  AppRegistry,
  StyleSheet,
  Text,
  View,
  ListView,
  TouchableOpacity,
  Image,
  AlertIOS
} from 'react-native';

import {
  CameraKitCamera,
  CameraKitGallery
} from 'react-native-camera-kit';

import CameraScreen from  './CameraScreen';
import AlbumsScreen from  './AlbumsScreen';

class example extends Component {
  
  constructor(props) {
    super(props);
    this.state = {
      example: undefined
    };
  }
  
  render() {
    if (this.state.example) {
      const Example = this.state.example;
      return <Example />;
    }
    return (
      <View style={styles.container}>
        
        <TouchableOpacity onPress={() => this.setState({example: CameraScreen})}>
          <Text style={styles.buttonText}>
            Camera Screen
          </Text>
        </TouchableOpacity>
        
        <TouchableOpacity onPress={() => this.setState({example: AlbumsScreen})}>
          <Text style={styles.buttonText}>
            Albums Screen
          </Text>
        </TouchableOpacity>
        
        <TouchableOpacity onPress={() => this.onCheckCameraAuthoPressed()}>
          <Text style={styles.buttonText}>
            Check Camera Autotization Status
          </Text>
        </TouchableOpacity>
        
        <TouchableOpacity onPress={() => this.onCheckGalleryAuthoPressed()}>
          <Text style={styles.buttonText}>
            Check Photos Autotization Status
          </Text>
        </TouchableOpacity>
      
      </View>
    
    );
  }
  
  async onCheckCameraAuthoPressed() {
    const success = await CameraKitCamera.checkDeviceCameraAuthorizationStatus();
    if (success) {
      AlertIOS.alert('You have permission!')
    }
    else {
      AlertIOS.alert('No permission :(')
    }
  }
  
  async onCheckGalleryAuthoPressed() {
    const success = await CameraKitGallery.checkDevicePhotosAuthorizationStatus();
    if (success) {
      AlertIOS.alert('You have permission!')
    }
    else {
      AlertIOS.alert('No permission :(')
    }
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  },
  buttonText: {
    color: 'blue',
    marginBottom: 20,
    fontSize: 20
    
  }
});

AppRegistry.registerComponent('example', () => example);