import 'dart:io';

import 'package:flutter/material.dart';
import 'package:path/path.dart' as p;

class Sheet {
  final String author;
  final String name;
  final String path;

  Sheet(this.author, this.name, this.path);
}

Future<List<Sheet>> loadSheetsSorted() async {
  var sheets = await _loadSheets();
  sheets.sort((left, right) => left.name.compareTo(right.name));
  return sheets;
}

Future<List<Sheet>> _loadSheets() async {
  // TODO: Handle directory not found
  var dir = Directory("/home/julian/Nextcloud/jhome/Klavier-Noten/");
  if (!dir.existsSync()) {
    throw Exception("Folder does not exist");
  }
  final List<Sheet> sheets = List.empty(growable: true);
  await for (final FileSystemEntity x in dir.list()) {
    if (x is Directory) {
      var authorName = p.basename(x.path);
      await for (final FileSystemEntity a in x.list()) {
        if (a is File) {
          var sheetName = p.basenameWithoutExtension(a.path);
          sheetName = sheetName.capitalize();
          sheets.add(Sheet(authorName, sheetName, a.path));
        }
      }
    }
  }
  return sheets;
}

extension StringExtension on String {
  String capitalize() {
    return "${this[0].toUpperCase()}${substring(1).toLowerCase()}";
  }
}

class SheetsWidget extends StatelessWidget {
  final List<Sheet> sheets;
  final ValueSetter<Sheet> callback;

  const SheetsWidget({super.key, required this.sheets, required this.callback});

  @override
  Widget build(context) {
    return ListView.builder(
        itemCount: sheets.length,
        itemBuilder: (context, index) {
          var sheet = sheets[index];
          return ListTile(
            title: Text(sheet.name),
            subtitle: Text(sheet.author),
            onTap: () => callback(sheet),
          );
        });
  }
}