import 'package:desktop_drop/desktop_drop.dart';
import 'package:flutter/material.dart';
import 'package:filepicker_windows/filepicker_windows.dart';
import 'package:archive/archive_io.dart';
import 'dart:io';
import 'package:url_launcher/url_launcher_string.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.lightBlue),
        useMaterial3: true,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});
  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        color: Colors.white,
        height: double.infinity,
        width: double.infinity,
        child: DropTarget(
          onDragDone: (detail) async {

            if (detail.files.isEmpty) {
              return;
            }

            if (detail.files.length == 1 && await File(detail.files[0].path).exists() ) {
              // 1ファイルでかつ、ファイルの場合

              final fileName = detail.files[0].name;
              final filePath = detail.files[0].path;
              final dirPath = filePath.substring(0, filePath.length - fileName.length);

              if (fileName.toLowerCase().endsWith('.zip')) {
                // zip圧縮ファイルの場合
                // 解凍実行
                final newDirName = fileName.substring(0, fileName.length - 4);
                final dstDirPath = "${dirPath}${newDirName}\\";
                final inputStream = InputFileStream(filePath);
                final archive = ZipDecoder().decodeBuffer(inputStream);
                for (var file in archive.files) {
                  if (file.isFile) {
                    final outputStream = OutputFileStream('${dstDirPath}${file.name}');
                    file.writeContent(outputStream);
                    outputStream.close();
                  }
                }
                inputStream.close();
                // 解凍先のフォルダをエクスプローラで開く
                launchUrlString('file://${dstDirPath}');

                return;
              }

            }
            // 圧縮実行
            final file = SaveFilePicker()
              ..filterSpecification = {'ZIPファイル': '*.zip'}
              ..defaultFilterIndex = 0
              ..defaultExtension = '*'
              ..fileName = 'newfile.zip'
              ..title = '圧縮ファイル名を設定してください';
            final saveFilePath = file.getFile();

            if (saveFilePath != null) {
              var encoder = ZipFileEncoder();
              encoder.create(saveFilePath.path);
              for (var file in detail.files) {
                if(await File(file.path).exists()) {
                  encoder.addFile(File(file.path));
                } else if(await Directory(file.path).exists()) {
                  encoder.addDirectory(Directory(file.path));
                }
              }
              encoder.close();
            }
          },
          child: const Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: [
              Icon(Icons.file_open, size: 48, color: Colors.blueAccent,),
              SizedBox(height: 5,),
              Text("圧縮・解凍ツール"),
              SizedBox(height: 10,),
              Text("ここにドロップしてください", style: TextStyle(fontSize: 13),)
            ],
          ),
        ),
      ),
    );
  }
}