import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:nextcloud/nextcloud.dart';
import 'package:persistent_bottom_nav_bar_v2/persistent_bottom_nav_bar_v2.dart';

import '../../../../api/marianumcloud/files-sharing/fileSharingApi.dart';
import '../../../../api/marianumcloud/files-sharing/fileSharingApiParams.dart';
import '../../../../api/marianumcloud/talk/sendMessage/sendMessage.dart';
import '../../../../api/marianumcloud/talk/sendMessage/sendMessageParams.dart';
import '../../../../api/marianumcloud/webdav/webdavApi.dart';
import '../../../../state/app/modules/chat/bloc/chat_bloc.dart';
import '../../../../state/app/modules/settings/bloc/settings_cubit.dart';
import '../../../../widget/file_pick.dart';
import '../../../../widget/focus_behaviour.dart';
import '../../files/files_upload_dialog.dart';
import 'answer_reference.dart';

class ChatTextfield extends StatefulWidget {
  final String sendToToken;
  final String? selfId;

  const ChatTextfield(this.sendToToken, {this.selfId, super.key});

  @override
  State<ChatTextfield> createState() => _ChatTextfieldState();
}

class _ChatTextfieldState extends State<ChatTextfield> {
  late SettingsCubit settings;
  final TextEditingController _textBoxController = TextEditingController();
  bool isLoading = false;

  void share(String shareFolder, List<String> filePaths) {
    for (final element in filePaths) {
      final fileName = element.split(Platform.pathSeparator).last;
      FileSharingApi().share(FileSharingApiParams(
        shareType: 10,
        shareWith: widget.sendToToken,
        path: '$shareFolder/$fileName',
      )).then((_) {
        if (mounted) context.read<ChatBloc>().refresh();
      });
    }
  }

  Future<void> mediaUpload(List<String>? paths) async {
    if (paths == null) return;

    const shareFolder = 'MarianumMobile';
    WebdavApi.webdav.then((webdav) => webdav.mkcol(PathUri.parse('/$shareFolder')));

    if (!mounted) return;
    pushScreen(
      context,
      withNavBar: false,
      screen: FilesUploadDialog(
        filePaths: paths,
        remotePath: shareFolder,
        onUploadFinished: (uploaded) => share(shareFolder, uploaded),
        uniqueNames: true,
      ),
    );
  }

  void _setDraft(String text) {
    final talkSettings = settings.val(write: true).talkSettings;
    if (text.isNotEmpty) {
      talkSettings.drafts[widget.sendToToken] = text;
    } else {
      talkSettings.drafts.removeWhere((key, _) => key == widget.sendToToken);
    }
  }

  void _setDraftReply(int? messageId) {
    final talkSettings = settings.val(write: true).talkSettings;
    if (messageId != null) {
      talkSettings.draftReplies[widget.sendToToken] = messageId;
    } else {
      talkSettings.draftReplies.removeWhere((key, _) => key == widget.sendToToken);
    }
  }

  @override
  void initState() {
    super.initState();
    settings = context.read<SettingsCubit>();
    final draftReply = settings.val().talkSettings.draftReplies[widget.sendToToken];
    if (draftReply != null) {
      context.read<ChatBloc>().setReferenceMessageId(draftReply);
    }
  }

  @override
  Widget build(BuildContext context) {
    _textBoxController.text = settings.val().talkSettings.drafts[widget.sendToToken] ?? '';
    final chatBloc = context.watch<ChatBloc>();
    final chatState = chatBloc.state.data;

    Widget replyBanner = const SizedBox.shrink();
    if (chatState != null && chatState.referenceMessageId != null && chatState.chatResponse != null) {
      try {
        final referenceMessage = chatState.chatResponse!.sortByTimestamp().firstWhere(
              (e) => e.id == chatState.referenceMessageId,
            );
        replyBanner = Row(
          children: [
            Expanded(
              child: AnswerReference(
                context: context,
                referenceMessage: referenceMessage,
                selfId: widget.selfId,
              ),
            ),
            IconButton(
              onPressed: () {
                chatBloc.setReferenceMessageId(null);
                _setDraftReply(null);
              },
              icon: const Icon(Icons.close_outlined),
              padding: const EdgeInsets.only(left: 0),
            ),
          ],
        );
      } catch (_) {/* reference no longer in current chat data */}
    }

    return Stack(children: <Widget>[
      Align(
        alignment: Alignment.bottomLeft,
        child: Container(
          padding: const EdgeInsets.only(left: 10, bottom: 3, top: 3, right: 10),
          width: double.infinity,
          child: Column(
            children: [
              replyBanner,
              Row(children: <Widget>[
                GestureDetector(
                  onTap: () {
                    showDialog(context: context, builder: (dialogCtx) => SimpleDialog(children: [
                      ListTile(
                        leading: const Icon(Icons.file_open),
                        title: const Text('Aus Dateien auswählen'),
                        onTap: () {
                          FilePick.documentPick().then(mediaUpload);
                          Navigator.of(dialogCtx).pop();
                        },
                      ),
                      Visibility(
                        visible: !Platform.isIOS,
                        child: ListTile(
                          leading: const Icon(Icons.image),
                          title: const Text('Aus Gallerie auswählen'),
                          onTap: () {
                            FilePick.multipleGalleryPick().then((value) {
                              if (value != null) mediaUpload(value.map((e) => e.path).toList());
                            });
                            Navigator.of(dialogCtx).pop();
                          },
                        ),
                      ),
                    ]));
                  },
                  child: Material(
                    elevation: 5,
                    shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(30)),
                    child: Container(
                      height: 30,
                      width: 30,
                      decoration: BoxDecoration(
                        color: Theme.of(context).primaryColor,
                        borderRadius: BorderRadius.circular(30),
                      ),
                      child: const Icon(Icons.attach_file_outlined, color: Colors.white, size: 20),
                    ),
                  ),
                ),
                const SizedBox(width: 15),
                Expanded(
                  child: TextField(
                    autocorrect: true,
                    textCapitalization: TextCapitalization.sentences,
                    controller: _textBoxController,
                    maxLines: 7,
                    minLines: 1,
                    decoration: const InputDecoration(
                      hintText: 'Nachricht schreiben...',
                      border: InputBorder.none,
                    ),
                    onChanged: (text) {
                      if (text.trim().toLowerCase() == 'marbot marbot marbot') {
                        const newText = 'Roboter sind cool und so, aber Marbots sind besser!';
                        _textBoxController.text = newText;
                        text = newText;
                      }
                      _setDraft(text);
                    },
                    onTapOutside: (_) => FocusBehaviour.textFieldTapOutside(context),
                  ),
                ),
                const SizedBox(width: 15),
                FloatingActionButton(
                  mini: true,
                  onPressed: () {
                    if (_textBoxController.text.isEmpty || isLoading) return;

                    setState(() => isLoading = true);
                    SendMessage(
                      widget.sendToToken,
                      SendMessageParams(
                        _textBoxController.text,
                        replyTo: chatBloc.state.data?.referenceMessageId?.toString(),
                      ),
                    ).run().then((_) {
                      if (!mounted) return;
                      chatBloc.refresh();
                      setState(() => isLoading = false);
                      _textBoxController.text = '';
                      _setDraft('');
                      chatBloc.setReferenceMessageId(null);
                      _setDraftReply(null);
                    });
                  },
                  backgroundColor: Theme.of(context).primaryColor,
                  elevation: 5,
                  child: isLoading
                      ? Container(
                          padding: const EdgeInsets.all(10),
                          child: const CircularProgressIndicator(color: Colors.white, strokeWidth: 2),
                        )
                      : const Icon(Icons.send, color: Colors.white, size: 18),
                ),
              ]),
            ],
          ),
        ),
      ),
    ]);
  }
}