import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

import '../widgets/record_bottom_sheet.dart';
import 'settings_screen.dart';

class HomeScreen extends StatefulWidget {
  const HomeScreen({super.key});

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  static const _channel = MethodChannel('com.snapledger.snapledger/share');

  @override
  void initState() {
    super.initState();
    _checkForSharedData();
    _channel.setMethodCallHandler((call) async {
      if (call.method == 'onShareReceived') {
        final args = Map<String, String>.from(call.arguments as Map);
        _handleSharedData(args);
      }
    });
  }

  Future<void> _checkForSharedData() async {
    try {
      final data = await _channel.invokeMethod<Map>('getSharedData');
      if (data != null && data.containsKey('uri')) {
        _handleSharedData(Map<String, String>.from(data));
      }
    } on PlatformException {
      // No shared data
    }
  }

  Future<void> _handleSharedData(Map<String, String> data) async {
    final filename = data['filename'] ?? 'upload.jpg';

    // Resolve the content URI to a local file
    // Use MethodChannel to get the actual file path from content URI
    try {
      final filePath = await _channel.invokeMethod<String>('getFilePath', {'uri': data['uri']});
      if (filePath == null || !File(filePath).existsSync()) return;

      if (!mounted) return;
      showModalBottomSheet(
        context: context,
        isScrollControlled: true,
        builder: (_) => RecordBottomSheet(
          imageFile: File(filePath),
          originalFilename: filename,
        ),
      );
    } on PlatformException {
      // Could not resolve file
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('SnapLedger'),
        actions: [
          IconButton(
            icon: const Icon(Icons.settings),
            onPressed: () => Navigator.of(context).push(
              MaterialPageRoute(builder: (_) => const SettingsScreen()),
            ),
          ),
        ],
      ),
      body: Center(
        child: Padding(
          padding: const EdgeInsets.all(32),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              const Icon(Icons.receipt_long, size: 64, color: Colors.grey),
              const SizedBox(height: 24),
              Text(
                '如何使用',
                style: Theme.of(context).textTheme.titleLarge,
              ),
              const SizedBox(height: 16),
              const Text(
                '1. 在支付成功页面截图\n'
                '2. 点击分享按钮\n'
                '3. 选择 SnapLedger\n'
                '4. 添加备注（可选）并提交',
                textAlign: TextAlign.center,
                style: TextStyle(fontSize: 16, color: Color(0xFF616161)),
              ),
            ],
          ),
        ),
      ),
    );
  }
}