import 'dart:io';

import 'package:cwtch/models/contact.dart';
import 'package:cwtch/models/message.dart';
import 'package:cwtch/third_party/linkify/flutter_linkify.dart';
import 'package:cwtch/models/profile.dart';
import 'package:cwtch/widgets/malformedbubble.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';
import 'package:provider/provider.dart';
import 'package:intl/intl.dart';
import 'package:url_launcher/url_launcher.dart';

import '../settings.dart';
import 'messagebubbledecorations.dart';

class MessageBubble extends StatefulWidget {
  final String content;

  MessageBubble(this.content);

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

class MessageBubbleState extends State<MessageBubble> {
  FocusNode _focus = FocusNode();

  @override
  Widget build(BuildContext context) {
    var fromMe = Provider.of<MessageMetadata>(context).senderHandle == Provider.of<ProfileInfoState>(context).onion;
    var borderRadiousEh = 15.0;
    var showClickableLinks = Provider.of<Settings>(context).isExperimentEnabled(ClickableLinksExperiment);

    DateTime messageDate = Provider.of<MessageMetadata>(context).timestamp;

    // If the sender is not us, then we want to give them a nickname...
    var senderDisplayStr = "";
    if (!fromMe) {
      ContactInfoState? contact = Provider.of<ProfileInfoState>(context).contactList.findContact(Provider.of<MessageMetadata>(context).senderHandle);
      if (contact != null) {
        senderDisplayStr = contact.nickname;
      } else {
        senderDisplayStr = Provider.of<MessageMetadata>(context).senderHandle;
      }
    }
    var wdgSender = SelectableText(senderDisplayStr,
        style: TextStyle(fontSize: 9.0, color: fromMe ? Provider.of<Settings>(context).theme.messageFromMeTextColor : Provider.of<Settings>(context).theme.messageFromOtherTextColor));

    var wdgMessage;

    if (!showClickableLinks) {
      wdgMessage = SelectableText(
        widget.content + '\u202F',
        //key: Key(myKey),
        focusNode: _focus,
        style: TextStyle(
          color: fromMe ? Provider.of<Settings>(context).theme.messageFromMeTextColor : Provider.of<Settings>(context).theme.messageFromOtherTextColor,
        ),
        textAlign: TextAlign.left,
        textWidthBasis: TextWidthBasis.longestLine,
      );
    } else {
      wdgMessage = SelectableLinkify(
        text: widget.content + '\u202F',
        // TODO: onOpen breaks the "selectable" functionality. Maybe something to do with gesture handler?
        options: LinkifyOptions(looseUrl: true, defaultToHttps: true),
        linkifiers: [UrlLinkifier()],
        onOpen: (link) {
          _modalOpenLink(context, link);
        },
        //key: Key(myKey),
        focusNode: _focus,
        style: TextStyle(
          color: fromMe ? Provider.of<Settings>(context).theme.messageFromMeTextColor : Provider.of<Settings>(context).theme.messageFromOtherTextColor,
        ),
        linkStyle: TextStyle(
          color: Provider.of<Settings>(context).current().mainTextColor,
        ),
        textAlign: TextAlign.left,
        textWidthBasis: TextWidthBasis.longestLine,
      );
    }

    var wdgDecorations = MessageBubbleDecoration(ackd: Provider.of<MessageMetadata>(context).ackd, errored: Provider.of<MessageMetadata>(context).error, fromMe: fromMe, messageDate: messageDate);

    var error = Provider.of<MessageMetadata>(context).error;

    return LayoutBuilder(builder: (context, constraints) {
      //print(constraints.toString()+", "+constraints.maxWidth.toString());
      return RepaintBoundary(
          child: Container(
              child: Container(
                  decoration: BoxDecoration(
                    color: error ? malformedColor : (fromMe ? Provider.of<Settings>(context).theme.messageFromMeBackgroundColor : Provider.of<Settings>(context).theme.messageFromOtherBackgroundColor),
                    border: Border.all(
                        color: error
                            ? malformedColor
                            : (fromMe ? Provider.of<Settings>(context).theme.messageFromMeBackgroundColor : Provider.of<Settings>(context).theme.messageFromOtherBackgroundColor),
                        width: 1),
                    borderRadius: BorderRadius.only(
                      topLeft: Radius.circular(borderRadiousEh),
                      topRight: Radius.circular(borderRadiousEh),
                      bottomLeft: fromMe ? Radius.circular(borderRadiousEh) : Radius.zero,
                      bottomRight: fromMe ? Radius.zero : Radius.circular(borderRadiousEh),
                    ),
                  ),
                  child: Padding(
                      padding: EdgeInsets.all(9.0),
                      child: Column(
                          crossAxisAlignment: fromMe ? CrossAxisAlignment.end : CrossAxisAlignment.start,
                          mainAxisAlignment: fromMe ? MainAxisAlignment.end : MainAxisAlignment.start,
                          mainAxisSize: MainAxisSize.min,
                          children: fromMe ? [wdgMessage, wdgDecorations] : [wdgSender, wdgMessage, wdgDecorations])))));
    });
  }

  void _modalOpenLink(BuildContext ctx, LinkableElement link) {
    showModalBottomSheet<void>(
        context: ctx,
        builder: (BuildContext bcontext) {
          return Container(
              height: 200, // bespoke value courtesy of the [TextField] docs
              child: Center(
                child: Padding(
                    padding: EdgeInsets.all(30.0),
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      mainAxisSize: MainAxisSize.min,
                      children: <Widget>[
                        Text(AppLocalizations.of(context)!.clickableLinksWarning),
                        Flex(direction: Axis.horizontal, mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[
                          Container(
                            margin: EdgeInsets.symmetric(vertical: 20, horizontal: 10),
                            child: ElevatedButton(
                              child: Text(AppLocalizations.of(context)!.clickableLinksCopy, semanticsLabel: AppLocalizations.of(context)!.clickableLinksCopy),
                              onPressed: () {
                                Clipboard.setData(new ClipboardData(text: link.url));

                                final snackBar = SnackBar(
                                  content: Text(AppLocalizations.of(context)!.copiedToClipboardNotification),
                                );

                                Navigator.pop(bcontext);
                                ScaffoldMessenger.of(context).showSnackBar(snackBar);
                              },
                            ),
                          ),
                          Container(
                            margin: EdgeInsets.symmetric(vertical: 20, horizontal: 10),
                            child: ElevatedButton(
                              child: Text(AppLocalizations.of(context)!.clickableLinkOpen, semanticsLabel: AppLocalizations.of(context)!.clickableLinkOpen),
                              onPressed: () async {
                                if (await canLaunch(link.url)) {
                                  await launch(link.url);
                                  Navigator.pop(bcontext);
                                } else {
                                  final snackBar = SnackBar(
                                    content: Text(AppLocalizations.of(context)!.clickableLinkError),
                                  );
                                  ScaffoldMessenger.of(context).showSnackBar(snackBar);
                                }
                              },
                            ),
                          ),
                        ]),
                      ],
                    )),
              ));
        });
  }
}