import 'dart:io';

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

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Sheetless',
      theme: ThemeData(
        useMaterial3: true,
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Sheetless'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class Sheet {
  final String author;
  final String name;

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

class _MyHomePageState extends State<MyHomePage> {
  Future<List<Sheet>> loadSheets() async {
    print("LOADING SHEETS!!! ###############################");
    // TODO: Handle directory not found
    var dir = Directory("/home/julian/Nextcloud/jhome/Klavier-Noten/");
    final List<Sheet> sheets = List.empty(growable: true);
    if (dir.existsSync()) {
      await for (final FileSystemEntity x in dir.list()) {
        if (x is Directory) {
          var y = x;
          var authorName = p.basename(y.path);
          await for (final FileSystemEntity a in y.list()) {
            if (a is File) {
              var sheetName = p.basenameWithoutExtension(a.path);
              sheets.add(Sheet(authorName, sheetName));
            }
          }
        }
      }
    }
    return sheets;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      // body: Center(
      //   child: Column(
      //     mainAxisAlignment: MainAxisAlignment.center,
      //     children: <Widget>[
      body: FutureBuilder(
          future: loadSheets(),
          builder: (BuildContext context, AsyncSnapshot<List<Sheet>> snapshot) {
            if (snapshot.hasData) {
              return SheetsWidget(sheets: snapshot.data!);
            } else if (snapshot.hasError) {
              return const Icon(Icons.error);
            } else {
              return const CircularProgressIndicator();
            }
          }),
      //     const Text(
      //       'You have pushed the button this many times:',
      //     ),
      //     Text(
      //       '$_counter',
      //       style: Theme.of(context).textTheme.headlineMedium,
      //     ),
      //   ],
      // ),
      // ),
    );
  }
}

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

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

  @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),
          );
        });
  }
}