Client/lib/screen/pages/files/files.dart

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

import 'package:flutter/material.dart';
import 'package:loader_overlay/loader_overlay.dart';
import 'package:marianum_mobile/api/marianumcloud/webdav/queries/listFiles/cacheableFile.dart';
import 'package:marianum_mobile/screen/pages/files/fileUpload.dart';
import 'package:marianum_mobile/widget/errorView.dart';
import 'package:persistent_bottom_nav_bar/persistent_tab_view.dart';

import '../../../api/marianumcloud/webdav/queries/listFiles/listFilesCache.dart';
import '../../../api/marianumcloud/webdav/queries/listFiles/listFilesResponse.dart';
import '../../../api/marianumcloud/webdav/webdavApi.dart';
import '../../../data/files/filesProps.dart';
import '../../../widget/filePick.dart';
import 'fileElement.dart';

class Files extends StatefulWidget {
  List<String> path;
  Files(this.path, {Key? key}) : super(key: key);

  @override
  State<Files> createState() => _FilesState();
}

class BetterSortOption {
  String displayName;
  int Function(CacheableFile, CacheableFile) compare;
  IconData icon;

  BetterSortOption({required this.displayName, required this.icon, required this.compare});
}

enum SortOption {
  name,
  date,
  size
}

class SortOptions {
  static Map<SortOption, BetterSortOption> options = {
    SortOption.name: BetterSortOption(
      displayName: "Name",
      icon: Icons.sort_by_alpha,
      compare: (CacheableFile a, CacheableFile b) => a.name.compareTo(b.name)
    ),
    SortOption.date: BetterSortOption(
      displayName: "Datum",
      icon: Icons.more_time_outlined,
      compare: (CacheableFile a, CacheableFile b) => a.modifiedAt!.compareTo(b.modifiedAt!)
    ),
    SortOption.size: BetterSortOption(
      displayName: "Größe",
      icon: Icons.monitor_weight,
      compare: (CacheableFile a, CacheableFile b) {
        if(a.isDirectory || b.isDirectory) return a.isDirectory ? 1 : 0;
        if(a.size == null) return 0;
        if(b.size == null) return 1;
        return a.size!.compareTo(b.size!);
      }
    )
  };

  static BetterSortOption getOption(SortOption option) {
    return options[option]!;
  }
}

class _FilesState extends State<Files> {
  FilesProps props = FilesProps();
  ListFilesResponse? data;

  SortOption currentSort = SortOption.name;
  bool currentSortDirection = true;

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

  void _query() {
    ListFilesCache(
        path: widget.path.isEmpty ? "/" : widget.path.join("/"),
        onUpdate: (ListFilesResponse d) => {
          setState(() {
            data = d;
          }),
        }
    );
  }

  @override
  Widget build(BuildContext context) {
    List<CacheableFile> files = (data?.files.toList() ?? List.empty())..sort(SortOptions.getOption(currentSort).compare);
    if(currentSortDirection) files = files.reversed.toList();

    return Scaffold(
      appBar: AppBar(
        title: Text(widget.path.isNotEmpty ? widget.path.last : "Dateien"),
        actions: [
          IconButton(
            icon: const Icon(Icons.search),
            onPressed: () => {
              // TODO implement search
            },
          ),
          PopupMenuButton<bool>(
            icon: Icon(currentSortDirection ? Icons.text_rotate_up : Icons.text_rotation_down),
            itemBuilder: (context) {
              return [true, false].map((e) => PopupMenuItem<bool>(
                  value: e,
                  enabled: e != currentSortDirection,
                  child: Row(
                    children: [
                      Icon(e ? Icons.text_rotate_up : Icons.text_rotation_down, color: Colors.black),
                      const SizedBox(width: 15),
                      Text(e ? "Aufsteigend" : "Absteigend")
                    ],
                  )
              )).toList();
            },
            onSelected: (e) {
              setState(() {
                currentSortDirection = e;
              });
            },
          ),
          PopupMenuButton<SortOption>(
            icon: const Icon(Icons.sort),
            itemBuilder: (context) {
              return SortOptions.options.keys.map((key) => PopupMenuItem<SortOption>(
                  value: key,
                  enabled: key != currentSort,
                  child: Row(
                    children: [
                      Icon(SortOptions.getOption(key).icon, color: Colors.black),
                      const SizedBox(width: 15),
                      Text(SortOptions.getOption(key).displayName)
                    ],
                  )
              )).toList();
            },
            onSelected: (e) {
              setState(() {
                currentSort = e;
              });
            },
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          showDialog(context: context, builder: (context) {
            return SimpleDialog(
              children: [
                ListTile(
                  leading: const Icon(Icons.folder),
                  title: const Text("Neuer Ordner"),
                  onTap: () {
                    WebdavApi.webdav.then((webdav) {
                      webdav.mkdirs("/MarianumMobileTest");
                    });
                  },
                ),
                ListTile(
                  leading: const Icon(Icons.file_open),
                  title: const Text("Aus Dateien auswählen"),
                  onTap: () {
                    context.loaderOverlay.show();
                    FilePick.documentPick().then((value) {
                      log(value ?? "?");
                      mediaUpload(value);
                    });
                    Navigator.of(context).pop();
                  },
                ),
                ListTile(
                  leading: const Icon(Icons.image),
                  title: const Text("Aus Gallerie auswählen"),
                  onTap: () {
                    context.loaderOverlay.show();
                    FilePick.galleryPick().then((value) {
                      log(value?.path ?? "?");
                      mediaUpload(value?.path);
                    });
                    Navigator.of(context).pop();
                  },
                ),
              ],
            );
          });
        },
        child: const Icon(Icons.upload),
      ),
      body: data == null ? const Center(child: CircularProgressIndicator()) : data!.files.isEmpty ? const ErrorView(icon: Icons.folder_off_rounded, text: "Der Ordner ist leer") : LoaderOverlay(
        child: RefreshIndicator(
          onRefresh: () {
            _query();
            return Future.delayed(const Duration(seconds: 3));
          },
          child: ListView.builder(
            itemCount: files.length,
            itemBuilder: (context, index) {
              CacheableFile file = files.toList().skip(index).first;
              return FileElement(file, widget.path);
            },
          ),
        )
      )
    );
  }

  void mediaUpload(String? path) async {
    if(path == null) {
      context.loaderOverlay.hide();
      return;
    }

    context.loaderOverlay.show();
    File file = File(path);
    var remotePath = "${widget.path.join("/")}/${file.path.split(Platform.pathSeparator).last}";
    PersistentNavBarNavigator.pushNewScreen(context, screen: FileUpload(localPath: path, remotePath: remotePath), withNavBar: false);

  }
}