import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter_hbb/mobile/pages/file_manager_page.dart';
import 'package:provider/provider.dart';
import 'package:url_launcher/url_launcher.dart';

import '../../common.dart';
import '../../models/model.dart';
import '../../models/peer_model.dart';
import '../../models/platform_model.dart';
import 'home_page.dart';
import 'remote_page.dart';
import 'scan_page.dart';
import 'settings_page.dart';

/// Connection page for connecting to a remote peer.
class ConnectionPage extends StatefulWidget implements PageShape {
  ConnectionPage({Key? key}) : super(key: key);

  @override
  final icon = Icon(Icons.connected_tv);

  @override
  final title = translate("Connection");

  @override
  final appBarActions = !isAndroid ? <Widget>[WebMenu()] : <Widget>[];

  @override
  _ConnectionPageState createState() => _ConnectionPageState();
}

/// State for the connection page.
class _ConnectionPageState extends State<ConnectionPage> {
  /// Controller for the id input bar.
  final _idController = TextEditingController();

  /// Update url. If it's not null, means an update is available.
  var _updateUrl = '';
  var _menuPos;

  @override
  void initState() {
    super.initState();
    if (_idController.text.isEmpty) {
      () async {
        final lastRemoteId = await bind.mainGetLastRemoteId();
        if (lastRemoteId != _idController.text) {
          setState(() {
            _idController.text = lastRemoteId;
          });
        }
      }();
    }
    if (isAndroid) {
      Timer(Duration(seconds: 5), () async {
        _updateUrl = await bind.mainGetSoftwareUpdateUrl();
        ;
        if (_updateUrl.isNotEmpty) setState(() {});
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    Provider.of<FfiModel>(context);
    return SingleChildScrollView(
      child: Column(
          mainAxisAlignment: MainAxisAlignment.start,
          mainAxisSize: MainAxisSize.max,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: <Widget>[
            getUpdateUI(),
            getSearchBarUI(),
            Container(height: 12),
            getPeers(),
          ]),
    );
  }

  /// Callback for the connect button.
  /// Connects to the selected peer.
  void onConnect() {
    var id = _idController.text.trim();
    connect(id);
  }

  /// Connect to a peer with [id].
  /// If [isFileTransfer], starts a session only for file transfer.
  void connect(String id, {bool isFileTransfer = false}) async {
    if (id == '') return;
    id = id.replaceAll(' ', '');
    if (isFileTransfer) {
      if (!await PermissionManager.check("file")) {
        if (!await PermissionManager.request("file")) {
          return;
        }
      }
      Navigator.push(
        context,
        MaterialPageRoute(
          builder: (BuildContext context) => FileManagerPage(id: id),
        ),
      );
    } else {
      Navigator.push(
        context,
        MaterialPageRoute(
          builder: (BuildContext context) => RemotePage(id: id),
        ),
      );
    }
    FocusScopeNode currentFocus = FocusScope.of(context);
    if (!currentFocus.hasPrimaryFocus) {
      currentFocus.unfocus();
    }
  }

  /// UI for software update.
  /// If [_updateUrl] is not empty, shows a button to update the software.
  Widget getUpdateUI() {
    return _updateUrl.isEmpty
        ? SizedBox(height: 0)
        : InkWell(
            onTap: () async {
              final url = _updateUrl + '.apk';
              if (await canLaunchUrl(Uri.parse(url))) {
                await launchUrl(Uri.parse(url));
              }
            },
            child: Container(
                alignment: AlignmentDirectional.center,
                width: double.infinity,
                color: Colors.pinkAccent,
                padding: EdgeInsets.symmetric(vertical: 12),
                child: Text(translate('Download new version'),
                    style: TextStyle(
                        color: Colors.white, fontWeight: FontWeight.bold))));
  }

  /// UI for the search bar.
  /// Search for a peer and connect to it if the id exists.
  Widget getSearchBarUI() {
    var w = Padding(
      padding: const EdgeInsets.fromLTRB(16.0, 8.0, 16.0, 0.0),
      child: Container(
        height: 84,
        child: Padding(
          padding: const EdgeInsets.only(top: 8, bottom: 8),
          child: Ink(
            decoration: BoxDecoration(
              color: MyTheme.white,
              borderRadius: const BorderRadius.all(Radius.circular(13)),
            ),
            child: Row(
              children: <Widget>[
                Expanded(
                  child: Container(
                    padding: const EdgeInsets.only(left: 16, right: 16),
                    child: TextField(
                      autocorrect: false,
                      enableSuggestions: false,
                      keyboardType: TextInputType.visiblePassword,
                      // keyboardType: TextInputType.number,
                      style: TextStyle(
                        fontFamily: 'WorkSans',
                        fontWeight: FontWeight.bold,
                        fontSize: 30,
                        color: MyTheme.idColor,
                      ),
                      decoration: InputDecoration(
                        labelText: translate('Remote ID'),
                        // hintText: 'Enter your remote ID',
                        border: InputBorder.none,
                        helperStyle: TextStyle(
                          fontWeight: FontWeight.bold,
                          fontSize: 16,
                          color: MyTheme.darkGray,
                        ),
                        labelStyle: TextStyle(
                          fontWeight: FontWeight.w600,
                          fontSize: 16,
                          letterSpacing: 0.2,
                          color: MyTheme.darkGray,
                        ),
                      ),
                      controller: _idController,
                    ),
                  ),
                ),
                SizedBox(
                  width: 60,
                  height: 60,
                  child: IconButton(
                    icon: Icon(Icons.arrow_forward,
                        color: MyTheme.darkGray, size: 45),
                    onPressed: onConnect,
                  ),
                ),
              ],
            ),
          ),
        ),
      ),
    );
    return Center(
        child: Container(constraints: BoxConstraints(maxWidth: 600), child: w));
  }

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

  /// Get the image for the current [platform].
  Widget getPlatformImage(String platform) {
    platform = platform.toLowerCase();
    if (platform == 'mac os')
      platform = 'mac';
    else if (platform != 'linux' && platform != 'android') platform = 'win';
    return Image.asset('assets/$platform.png', width: 24, height: 24);
  }

  /// Get all the saved peers.
  Widget getPeers() {
    final windowWidth = MediaQuery.of(context).size.width;
    final space = 8.0;
    var width = windowWidth - 2 * space;
    final minWidth = 320.0;
    if (windowWidth > minWidth + 2 * space) {
      final n = (windowWidth / (minWidth + 2 * space)).floor();
      width = windowWidth / n - 2 * space;
    }
    return FutureBuilder<List<Peer>>(
        future: gFFI.peers(),
        builder: (context, snapshot) {
          final cards = <Widget>[];
          if (snapshot.hasData) {
            final peers = snapshot.data!;
            peers.forEach((p) {
              cards.add(Container(
                  width: width,
                  child: Card(
                      child: GestureDetector(
                          onTap:
                              !isWebDesktop ? () => connect('${p.id}') : null,
                          onDoubleTap:
                              isWebDesktop ? () => connect('${p.id}') : null,
                          onLongPressStart: (details) {
                            final x = details.globalPosition.dx;
                            final y = details.globalPosition.dy;
                            _menuPos = RelativeRect.fromLTRB(x, y, x, y);
                            showPeerMenu(context, p.id);
                          },
                          child: ListTile(
                            contentPadding: const EdgeInsets.only(left: 12),
                            subtitle: Text('${p.username}@${p.hostname}'),
                            title: Text('${p.id}'),
                            leading: Container(
                                padding: const EdgeInsets.all(6),
                                child: getPlatformImage('${p.platform}'),
                                color: str2color('${p.id}${p.platform}', 0x7f)),
                            trailing: InkWell(
                                child: Padding(
                                    padding: const EdgeInsets.all(12),
                                    child: Icon(Icons.more_vert)),
                                onTapDown: (e) {
                                  final x = e.globalPosition.dx;
                                  final y = e.globalPosition.dy;
                                  _menuPos = RelativeRect.fromLTRB(x, y, x, y);
                                },
                                onTap: () {
                                  showPeerMenu(context, p.id);
                                }),
                          )))));
            });
          }
          return Wrap(children: cards, spacing: space, runSpacing: space);
        });
  }

  /// Show the peer menu and handle user's choice.
  /// User might remove the peer or send a file to the peer.
  void showPeerMenu(BuildContext context, String id) async {
    var value = await showMenu(
      context: context,
      position: this._menuPos,
      items: [
            PopupMenuItem<String>(
                child: Text(translate('Remove')), value: 'remove')
          ] +
          (!isAndroid
              ? []
              : [
                  PopupMenuItem<String>(
                      child: Text(translate('Transfer File')), value: 'file')
                ]),
      elevation: 8,
    );
    if (value == 'remove') {
      setState(() => bind.mainRemovePeer(id: id));
      () async {
        removePreference(id);
      }();
    } else if (value == 'file') {
      connect(id, isFileTransfer: true);
    }
  }
}

class WebMenu extends StatefulWidget {
  @override
  _WebMenuState createState() => _WebMenuState();
}

class _WebMenuState extends State<WebMenu> {
  String? username;
  String url = "";

  @override
  void initState() {
    super.initState();
    () async {
      final usernameRes = await getUsername();
      final urlRes = await getUrl();
      var update = false;
      if (usernameRes != username) {
        username = usernameRes;
        update = true;
      }
      if (urlRes != url) {
        url = urlRes;
        update = true;
      }

      if (update) {
        setState(() {});
      }
    }();
  }

  @override
  Widget build(BuildContext context) {
    Provider.of<FfiModel>(context);
    return PopupMenuButton<String>(
        icon: Icon(Icons.more_vert),
        itemBuilder: (context) {
          return (isIOS
                  ? [
                      PopupMenuItem(
                        child: Icon(Icons.qr_code_scanner, color: Colors.black),
                        value: "scan",
                      )
                    ]
                  : <PopupMenuItem<String>>[]) +
              [
                PopupMenuItem(
                  child: Text(translate('ID/Relay Server')),
                  value: "server",
                )
              ] +
              (url.contains('admin.rustdesk.com')
                  ? <PopupMenuItem<String>>[]
                  : [
                      PopupMenuItem(
                        child: Text(username == null
                            ? translate("Login")
                            : translate("Logout") + ' ($username)'),
                        value: "login",
                      )
                    ]) +
              [
                PopupMenuItem(
                  child: Text(translate('About') + ' RustDesk'),
                  value: "about",
                )
              ];
        },
        onSelected: (value) {
          if (value == 'server') {
            showServerSettings();
          }
          if (value == 'about') {
            showAbout();
          }
          if (value == 'login') {
            if (username == null) {
              showLogin();
            } else {
              logout();
            }
          }
          if (value == 'scan') {
            Navigator.push(
              context,
              MaterialPageRoute(
                builder: (BuildContext context) => ScanPage(),
              ),
            );
          }
        });
  }
}