var React = require('react-native');
var { StyleSheet } = React;

var WebViewAndroid = require('react-native-webview-android');

var SITE_URL = "https://www.google.com";

var WebViewAndroidExample = React.createClass({
    getInitialState: function() {
      return {
        url: SITE_URL,
        // OR
        // you can use a source object like React Native Webview.
        // source {uri: string, method: string, headers: object, body: string}, {html: string, baseUrl: string}
        // Loads static html or a uri (with optional headers) in the WebView. <Just like React Native's version>
        // source: {
        //   uri: SITE_URL,
        //   headers: {
        //     ...
        //   },
        // },
        status: 'No Page Loaded',
        backButtonEnabled: false,
        forwardButtonEnabled: false,
        loading: true,
        messageFromWebView: null
      };
    },
    goBack: function() {
      // you can use this callback to control web view
      this.refs.webViewAndroidSample.goBack();
    },
    goForward: function() {
      this.refs.webViewAndroidSample.goForward();
    },
    reload: function() {
      this.refs.webViewAndroidSample.reload();
    },
    stopLoading: function() {
      // stops the current load
      this.refs.webViewAndroidSample.stopLoading();
    },
    postMessage: function(data) {
      // posts a message to web view
      this.refs.webViewAndroidSample.postMessage(data);
    },
    evaluateJavascript: function(data) {
      // evaluates javascript directly on the webview instance
      this.refs.webViewAndroidSample.evaluateJavascript(data);
    },
    injectJavaScript: function(script) {
      // executes JavaScript immediately in web view
      this.refs.webViewAndroidSample.injectJavaScript(script);
    },
    onShouldStartLoadWithRequest: function(event) {
      // currently only url & navigationState are returned in the event.
      console.log(event.url);
      console.log(event.navigationState);

      if (event.url === 'https://www.mywebsiteexample.com/') {
        return true;
      } else {
        return false;
      }
    },
    onNavigationStateChange: function(event) {
      console.log(event);

      this.setState({
        backButtonEnabled: event.canGoBack,
        forwardButtonEnabled: event.canGoForward,
        url: event.url,
        status: event.title,
        loading: event.loading
      });
    },
    onMessage: function(event) {
      this.setState({
        messageFromWebView: event.message
      });
    },
    javascriptToInject: function () {
      return `
        $(document).ready(function() {
          $('a').click(function(event) {
            if ($(this).attr('href')) {
              var href = $(this).attr('href');
              window.webView.postMessage('Link tapped: ' + href);
            }
          })
        })
      `
    },
    render: function() {
      return (
        <WebViewAndroid
          ref="webViewAndroidSample"
          javaScriptEnabled={true}
          geolocationEnabled={false}
          builtInZoomControls={false}
          injectedJavaScript={this.javascriptToInject()}
          onShouldStartLoadWithRequest={this.onShouldStartLoadWithRequest}
          onNavigationStateChange={this.onNavigationStateChange}
          onMessage={this.onMessage}
          url={SITE_URL} // or use the source(object) attribute...
          style={styles.containerWebView} />
      );

      // other attributes: source(object), html(string), htmlCharset(string), baseUrl(string), injectedJavaScript(string), disableCookies(bool), disablePlugins(bool), userAgent(string)
    }
});

var styles = StyleSheet.create({
  containerWebView: {
    flex: 1,
  }
});