import 'dart:collection';
// import 'dart:convert';
import 'dart:io';
// import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:flutter_inappwebview/flutter_inappwebview.dart';
// import 'package:path_provider/path_provider.dart';
import 'package:url_launcher/url_launcher.dart';

import 'main.dart';

class InAppWebViewExampleScreen extends StatefulWidget {
  @override
  _InAppWebViewExampleScreenState createState() =>
      new _InAppWebViewExampleScreenState();
}

class _InAppWebViewExampleScreenState extends State<InAppWebViewExampleScreen> {
  final GlobalKey webViewKey = GlobalKey();

  InAppWebViewController? webView;
  late ContextMenu contextMenu;
  String url = "";
  double progress = 0;
  // CookieManager _cookieManager = CookieManager.instance();

  @override
  void initState() {
    super.initState();

    contextMenu = ContextMenu(
        menuItems: [
          ContextMenuItem(
              androidId: 1,
              iosId: "1",
              title: "Special",
              action: () async {
                print("Menu item Special clicked!");
                print(await webView?.getSelectedText());
                await webView?.clearFocus();
              })
        ],
        options: ContextMenuOptions(hideDefaultSystemContextMenuItems: false),
        onCreateContextMenu: (hitTestResult) async {
          print("onCreateContextMenu");
          print(hitTestResult.extra);
          print(await webView?.getSelectedText());
        },
        onHideContextMenu: () {
          print("onHideContextMenu");
        },
        onContextMenuActionItemClicked: (contextMenuItemClicked) async {
          var id = (Platform.isAndroid)
              ? contextMenuItemClicked.androidId
              : contextMenuItemClicked.iosId;
          print("onContextMenuActionItemClicked: " +
              id.toString() +
              " " +
              contextMenuItemClicked.title);
        });
  }

  @override
  void dispose() {
    super.dispose();
  }

  var options = InAppWebViewGroupOptions(
      crossPlatform: InAppWebViewOptions(
        useShouldOverrideUrlLoading: false,
        mediaPlaybackRequiresUserGesture: false,
      ),
      android: AndroidInAppWebViewOptions(
        useHybridComposition: true,
      ),
      ios: IOSInAppWebViewOptions(
        allowsInlineMediaPlayback: true,
      ));

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: Text("InAppWebView")),
        drawer: myDrawer(context: context),
        body: SafeArea(
            child: Column(children: <Widget>[
          Container(
            padding: EdgeInsets.all(20.0),
            child: Text(
                "CURRENT URL\n${(url.length > 50) ? url.substring(0, 50) + "..." : url}"),
          ),
          Container(
              padding: EdgeInsets.all(10.0),
              child: progress < 1.0
                  ? LinearProgressIndicator(value: progress)
                  : Container()),
          Expanded(
            child: Container(
              margin: const EdgeInsets.all(10.0),
              decoration:
                  BoxDecoration(border: Border.all(color: Colors.blueAccent)),
              child: InAppWebView(
                key: webViewKey,
                // contextMenu: contextMenu,
                initialUrlRequest:
                    URLRequest(url: Uri.parse("https://flutter.dev")),
                // initialFile: "assets/index.html",
                initialUserScripts: UnmodifiableListView<UserScript>([]),
                initialOptions: options,
                onWebViewCreated: (controller) {
                  webView = controller;
                  print("onWebViewCreated");
                },
                onLoadStart: (controller, url) {
                  print("onLoadStart $url");
                  setState(() {
                    this.url = url.toString();
                  });
                },
                androidOnPermissionRequest: (InAppWebViewController controller,
                    String origin, List<String> resources) async {
                  return PermissionRequestResponse(
                      resources: resources,
                      action: PermissionRequestResponseAction.GRANT);
                },
                shouldOverrideUrlLoading: (controller, navigationAction) async {
                  var uri = navigationAction.request.url!;

                  if (![
                    "http",
                    "https",
                    "file",
                    "chrome",
                    "data",
                    "javascript",
                    "about"
                  ].contains(uri.scheme)) {
                    if (await canLaunch(url)) {
                      // Launch the App
                      await launch(
                        url,
                      );
                      // and cancel the request
                      return NavigationActionPolicy.CANCEL;
                    }
                  }

                  return NavigationActionPolicy.ALLOW;
                },
                onLoadStop: (controller, url) async {
                  print("onLoadStop $url");
                  setState(() {
                    this.url = url.toString();
                  });
                  webView = controller;
                },
                onProgressChanged: (controller, progress) {
                  setState(() {
                    this.progress = progress / 100;
                  });
                },
                onUpdateVisitedHistory: (controller, url, androidIsReload) {
                  print("onUpdateVisitedHistory $url");
                  setState(() {
                    this.url = url.toString();
                  });
                },
                onConsoleMessage: (controller, consoleMessage) {
                  print(consoleMessage);
                },
              ),
            ),
          ),
          ButtonBar(
            alignment: MainAxisAlignment.center,
            children: <Widget>[
              ElevatedButton(
                child: Icon(Icons.arrow_back),
                onPressed: () {
                  webView?.goBack();
                },
              ),
              ElevatedButton(
                child: Icon(Icons.arrow_forward),
                onPressed: () {
                  webView?.goForward();
                },
              ),
              ElevatedButton(
                child: Icon(Icons.refresh),
                onPressed: () {
                  webView?.reload();
                },
              ),
            ],
          ),
        ])));
  }
}