import 'dart:io';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:path_provider/path_provider.dart';
import 'package:photobooth_mobile_app/core/image/image_cleanup_service.dart';
import 'package:photobooth_mobile_app/core/image/image_compositor.dart';
import 'package:photobooth_mobile_app/core/print/print_service.dart';

class PreviewScreen extends StatefulWidget {
  final String imagePath;
  final String frameAsset;
  final bool isFrontCamera;

  const PreviewScreen({
    super.key,
    required this.imagePath,
    required this.frameAsset,
    required this.isFrontCamera,
  });

  @override
  State<PreviewScreen> createState() => _PreviewScreenState();
}

class _PreviewScreenState extends State<PreviewScreen> {
  final ImageCompositor _compositor = ImageCompositor();
  final PrintService _printer = PrintService();
  final ImageCleanupService _cleanup = ImageCleanupService();

  late String _finalPath;
  String? _lastFinalPath;
  bool _loading = true;

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

  Future<void> _init() async {
    final dir = await getTemporaryDirectory();
    final twibbonData = await rootBundle.load(widget.frameAsset);

    await _cleanup.deleteIfExists(_lastFinalPath);

    final newPath = await _compositor.composeFinalA5(
      imagePath: widget.imagePath,
      twibbonBytes: twibbonData.buffer.asUint8List(),
      tempDir: dir.path,
      isFrontCamera: widget.isFrontCamera,
    );

    _lastFinalPath = newPath;
    _finalPath = newPath;

    await _cleanup.keepLastN(tempDir: dir.path, maxFiles: 10);

    if (mounted) {
      setState(() => _loading = false);
    }
  }

  @override
  void dispose() {
    _cleanup.deleteIfExists(_finalPath);
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Pratinjau')),
      body: Column(
        children: [
          Expanded(
            child: _loading
                ? const Center(child: CupertinoActivityIndicator())
                : Center(
                    child: AspectRatio(
                      aspectRatio: 148 / 210,
                      child: Image.file(File(_finalPath), fit: BoxFit.contain),
                    ),
                  ),
          ),
          Padding(
            padding: const EdgeInsets.all(16),
            child: ElevatedButton.icon(
              icon: const Icon(Icons.print),
              label: Text(_loading ? 'Menyiapkan...' : 'Cetak'),
              onPressed: _loading
                  ? null
                  : () async {
                      final pdfPath = await _printer.generateA5Pdf(_finalPath);
                      await _printer.sharePdf(pdfPath);
                    },
            ),
          ),
        ],
      ),
    );
  }
}