import 'dart:developer';
import 'dart:io';

import 'package:async/async.dart';
import 'package:flutter/material.dart';
import 'package:marianum_mobile/api/marianumcloud/webdav/webdavApi.dart';

class FileUpload extends StatefulWidget {
  final String localPath;
  final String remotePath;
  const FileUpload({Key? key, required this.localPath, required this.remotePath}) : super(key: key);

  @override
  State<FileUpload> createState() => _FileUploadState();
}

class _FileUploadState extends State<FileUpload> {
  CancelableOperation? cancelableOperation;
  late File localFile;

  @override
  void initState() {
    super.initState();
    localFile = File(widget.localPath);
  }

  bool isRunning() {
    return cancelableOperation != null && !(cancelableOperation!.isCompleted);
  }

  bool isComplete() {
    return cancelableOperation?.isCompleted ?? false;
  }

  void start() async {
    cancelableOperation = CancelableOperation.fromFuture(
      (await WebdavApi.webdav).upload(localFile.readAsBytesSync(), widget.remotePath).then((value) {
        log("Upload done!");
      }),
      onCancel: () => log("Upload cancelled"),
    );

    cancelableOperation!.then((e) {
      setState(() {});
    });
    setState(() {});
  }

  void stop() {
    cancelableOperation?.cancel();
    setState(() {});
    Navigator.of(context).pop();
  }


  @override
  Widget build(BuildContext context) {
    List<Widget> actions = List<Widget>.empty(growable: true);
    if(!isRunning() && !isComplete()) actions.add(TextButton(onPressed: start, child: const Text("Upload starten")));
    if(isRunning()) actions.add(TextButton(onPressed: stop, child: const Text("Upload Abbrechen")));
    if(isComplete()) actions.add(TextButton(onPressed: Navigator.of(context).pop, child: const Text("Fertig")));

    return AlertDialog(
      title: const Text("Hochladen"),
      content: Center(
        child: isRunning() ? const CircularProgressIndicator() : const Text("Datei hochladen"),
      ),
      actions: actions,
      icon: const Icon(Icons.upload),
    );
  }
}