import 'package:flutter/material.dart';
import 'package:one_key/utils/event_bus.dart';
import 'package:one_key/widgets/system_app_bar.dart';

// import 'package:path_provider/path_provider.dart';
import 'package:webview_flutter/webview_flutter.dart';
// #docregion platform_imports
// Import for Android features.
import 'package:webview_flutter_android/webview_flutter_android.dart';
// Import for iOS features.
import 'package:webview_flutter_wkwebview/webview_flutter_wkwebview.dart';


/**
 * 
 * 帮助与反馈页面    功能暂时已经弃用
 */

class WebViewPage extends StatefulWidget {
  @override
  _WebViewPageState createState() => _WebViewPageState();
}

class _WebViewPageState extends State<WebViewPage> {
  late WebViewController _controller = WebViewController();
//  late final WebViewController _controller;
  @override
  void initState() {
    super.initState();
    // Enable hybrid composition.
    // if (Platform.isAndroid) WebView.platform = SurfaceAndroidWebView();
    // #docregion platform_features
    late final PlatformWebViewControllerCreationParams params;
    if (WebViewPlatform.instance is WebKitWebViewPlatform) {
      params = WebKitWebViewControllerCreationParams(
        allowsInlineMediaPlayback: true,
        mediaTypesRequiringUserAction: const <PlaybackMediaTypes>{},
      );
    } else {
      params = const PlatformWebViewControllerCreationParams();
    }

    final WebViewController controller =
        WebViewController.fromPlatformCreationParams(params);
    // #enddocregion platform_features

    controller
      ..setJavaScriptMode(JavaScriptMode.unrestricted)
      ..setBackgroundColor(const Color(0x00000000))
      ..setNavigationDelegate(
        NavigationDelegate(
          onProgress: (int progress) {
            debugPrint('WebView is loading (progress : $progress%)');
          },
          onPageStarted: (String url) {
            debugPrint('Page started loading: $url');
          },
          onPageFinished: (String url) {
            debugPrint('Page finished loading: $url');
          },
          onWebResourceError: (WebResourceError error) {
            debugPrint('''
Page resource error:
  code: ${error.errorCode}
  description: ${error.description}
  errorType: ${error.errorType}
  isForMainFrame: ${error.isForMainFrame}
          ''');
          },
          onNavigationRequest: (NavigationRequest request) {
            if (request.url.startsWith('https://www.youtube.com/')) {
              debugPrint('blocking navigation to ${request.url}');
              return NavigationDecision.prevent;
            }
            debugPrint('allowing navigation to ${request.url}');
            return NavigationDecision.navigate;
          },
          onUrlChange: (UrlChange change) {
            debugPrint('url change to ${change.url}');
          },
          onHttpAuthRequest: (HttpAuthRequest request) {
            // openDialog(request);
          },
        ),
      )
      ..addJavaScriptChannel(
        'Toaster',
        onMessageReceived: (JavaScriptMessage message) {
          ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(content: Text(message.message)),
          );
        },
      )
      ..loadRequest(Uri.parse("https://support.qq.com/product/152856"));

    // #docregion platform_features
    if (controller.platform is AndroidWebViewController) {
      AndroidWebViewController.enableDebugging(true);
      (controller.platform as AndroidWebViewController)
          .setMediaPlaybackRequiresUserGesture(false);
    }
    // #enddocregion platform_features

    _controller = controller;
  }

  @override
  void dispose() {
    // TODO: implement dispose
    EventBus().emit('changeStatusColor');
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      // We're using a Builder here so we have a context that is below the Scaffold
      // to allow calling Scaffold.of(context) so we can show a snackbar.
      appBar: SystemAppBar(
        '周到安排商家',
      ),
      body: Builder(builder: (BuildContext context) {
        return WebViewWidget(controller: _controller);
        //   initialUrl: "https://support.qq.com/product/152856",
        //   javascriptMode: JavascriptMode.unrestricted,
        //   onWebViewCreated: (WebViewController webViewController) {
        //     _controller.complete(webViewController);
        //   },
        //   // TODO(iskakaushik): Remove this when collection literals makes it to stable.
        //   // ignore: prefer_collection_literals
        //   javascriptChannels: <JavascriptChannel>[
        //     _toasterJavascriptChannel(context),
        //   ].toSet(),
        //   navigationDelegate: (NavigationRequest request) {
        //     if (request.url.startsWith('https://www.youtube.com/')) {
        //       print('blocking navigation to $request}');
        //       return NavigationDecision.prevent;
        //     }
        //     print('allowing navigation to $request');
        //     return NavigationDecision.navigate;
        //   },
        //   onPageStarted: (String url) {
        //     print('Page started loading: $url');
        //   },
        //   onPageFinished: (String url) {
        //     print('Page finished loading: $url');
        //   },
        //   gestureNavigationEnabled: true,
        // );
      }),
    );
  }

  // JavascriptChannel _toasterJavascriptChannel(BuildContext context) {
  //   return JavascriptChannel(
  //       name: 'Toaster',
  //       onMessageReceived: (JavascriptMessage message) {
  //         ScaffoldMessenger.of(context).showSnackBar(
  //           SnackBar(content: Text(message.message)),
  //         );
  //       });
  // }
}