/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 */
'use strict';
import React, {
  AppRegistry,
  Component,
  StyleSheet,
  Platform,
  Text,
  View,
  Alert,
  TouchableOpacity,
  Linking,
  Image,
} from 'react-native';

import {
  isFirstTime,
  isRolledBack,
  packageVersion,
  currentVersion,
  checkUpdate,
  downloadUpdate,
  switchVersion,
  switchVersionLater,
  markSuccess,
} from 'react-native-update';

import _updateConfig from '../update.json';
const {appKey} = _updateConfig[Platform.OS];

class MyProject extends Component {
  componentWillMount(){
    if (isRolledBack) {
      Alert.alert('提示', '刚刚更新失败了,版本被回滚.');
    } else if (isFirstTime) {
      Alert.alert('提示', '这是当前版本第一次启动,是否要模拟启动失败?将回滚到上一版本', [
        {text: '是', onPress: ()=>{throw new Error('模拟启动失败,请重启应用')}},
        {text: '否', onPress: ()=>{markSuccess()}},
      ]);
    };
  }
  doUpdate = info => {
    downloadUpdate(info).then(hash => {
      Alert.alert('提示', '下载完毕,是否重启应用?', [
        {text: '是', onPress: ()=>{switchVersion(hash);}},
        {text: '否',},
        {text: '下次启动时', onPress: ()=>{switchVersionLater(hash);}},
      ]);
    }).catch(err => {
      Alert.alert('提示', '更新失败.');
    });
  };

  checkUpdate = () => {
    checkUpdate(appKey).then(info => {
      if (info.expired) {
        Alert.alert('提示', '您的应用版本已更新,请前往应用商店下载新的版本', [
          {text: '确定', onPress: ()=>{info.downloadUrl && Linking.openURL(info.downloadUrl)}},
        ]);
      } else if (info.upToDate) {
        Alert.alert('提示', '您的应用版本已是最新.');
      } else {
        Alert.alert('提示', '检查到新的版本'+info.name+',是否下载?\n'+ info.description, [
          {text: '是', onPress: ()=>{this.doUpdate(info)}},
          {text: '否',},
        ]);
      }
    }).catch(err => {
      Alert.alert('提示', '检查更新失败.');
    });
  };

  render() {
    return (
      <View style={styles.container}>
        <Text style={styles.welcome}>
          欢迎使用热更新服务
        </Text>
        <Image
          resizeMode = {'contain'}
          source = {require('./assets/shoucang.png')}
          style = {styles.image}
        />
        <Text style={styles.instructions}>
          这是版本一 {'\n'}
          当前包版本号: {packageVersion}{'\n'}
          当前版本Hash: {currentVersion||'(空)'}{'\n'}
        </Text>
        <TouchableOpacity onPress={this.checkUpdate}>
          <Text style={styles.instructions}>
            点击这里检查更新
          </Text>
        </TouchableOpacity>
      </View>
    );
  }
}

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 : {
  },
});

AppRegistry.registerComponent('testHotUpdate', () => MyProject);