import 'dart:io';

import 'package:filemanager/main.dart';
import 'package:flutter/material.dart';

enum FileOptions{delete, copy, cut, rename}

class FileButton extends StatefulWidget{
  FileButton({super.key, required this.fsEntity, required this.openFile, required this.refresh, required this.copyFile, required this.setMode, required this.getMode, required this.selectionList}) : name = fsEntity.path.split('/').last;

  final FileSystemEntity fsEntity;
  final Function(FileSystemEntity, String) openFile;
  final Function() refresh;
  final Function(FileSystemEntity, FileOptions) copyFile;
  final Function(FMMode) setMode;
  final Function() getMode;
  final Function(FileButton, bool) selectionList;
  final String name;

  @override
  State<FileButton> createState() => _FileButtonState();
}

class _FileButtonState extends State<FileButton>{

  bool selected = false;
  late Icon icon;
  Color? color;
  VoidCallback? onPress;
  VoidCallback? onLongPress;

  @override
  void initState(){
    super.initState();
    onPress = onPressed;
    onLongPress = onLongPressed;
  }

  void onPressed(){
    if(widget.getMode() == FMMode.normal){
      widget.openFile(widget.fsEntity, widget.name);
    }
    else if(widget.getMode() == FMMode.selection){
      setState((){
        if(selected){
          selected = false;
          widget.selectionList(widget, false);
        }
        else{
          selected = true;
          widget.selectionList(widget, true);
        }
      });
    }
  }

  void onLongPressed(){
    setState((){
      selected = true;
    });
    widget.setMode(FMMode.selection);
    widget.selectionList(widget, true);
  }

  void _handleOption(FileOptions value){
    switch (value){
      case FileOptions.cut:
        setState((){
          onPress = null;
          onLongPress = null;
        });
        continue copy;
      copy:
      case FileOptions.copy:
        widget.copyFile(widget.fsEntity, value);
        break;
      case FileOptions.rename:
        var controller = TextEditingController();
        String fileExtension = widget.fsEntity.path.substring(widget.fsEntity.path.lastIndexOf('.'));
        showDialog(
          context: context,
          builder: (BuildContext context) => AlertDialog(
            title: const Text('Rename'),
            content: TextField(
              controller: controller,
            ),
            actions: <IconButton>[
              IconButton(
                  onPressed: () => Navigator.pop(context),
                  icon: const Icon(Icons.cancel)),
              IconButton(
                  onPressed: () {
                    widget.fsEntity.renameSync(
                        '${widget.fsEntity.parent.path}/${controller.text}$fileExtension');
                    Navigator.pop(context);
                    widget.refresh();
                  },
                  icon: const Icon(Icons.check)),
            ],
          ),
        );
        break;
      case FileOptions.delete:
        widget.fsEntity.deleteSync(recursive: true);
      //TODO: call getdirbuttons here
    }
    widget.refresh();
  }

  @override
  Widget build(BuildContext context){
    color = null;
    if(selected){
      icon = const Icon(Icons.check);
      color = Theme.of(context).focusColor;
    }
    else if(widget.fsEntity is File){
      icon = const Icon(Icons.file_copy);
    }
    else if(widget.fsEntity is Directory){
      icon = const Icon(Icons.folder);
    }
    else{
      icon = const Icon(Icons.question_mark);
    }
    return MaterialButton(
      color: color,
      onPressed: onPress, 
      onLongPress: onLongPress,
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.center,
        children: <Widget>[
          SafeArea(child: icon),
          const SizedBox(width: 10),
          Expanded(child: Text(widget.name)),
          SafeArea(
            child: PopupMenuButton(
              itemBuilder: (context) => <PopupMenuEntry<FileOptions>>[
                const PopupMenuItem<FileOptions>(value: FileOptions.copy,child: Text('Copy')),
                const PopupMenuItem<FileOptions>(value: FileOptions.cut,child: Text('Cut')),
                const PopupMenuItem<FileOptions>(value: FileOptions.rename,child: Text('Rename')),
                const PopupMenuItem<FileOptions>(value: FileOptions.delete,child: Text('Delete')),
              ],
              onSelected: null
            ),
          )
        ],
      ),
    );
  }
}