import 'package:flutter/material.dart';
import 'package:auto_route/auto_route.dart';
import 'package:package_info_plus/package_info_plus.dart';
import 'package:device_info_plus/device_info_plus.dart';

import '../../../common/theme/theme.dart';

@RoutePage()
class AboutAppPage extends StatefulWidget {
  const AboutAppPage({super.key});

  @override
  State<AboutAppPage> createState() => _AboutAppPageState();
}

class _AboutAppPageState extends State<AboutAppPage>
    with TickerProviderStateMixin {
  PackageInfo? packageInfo;
  String deviceInfo = '';
  late AnimationController _fadeController;
  late AnimationController _slideController;
  late Animation<double> _fadeAnimation;
  late Animation<Offset> _slideAnimation;

  @override
  void initState() {
    super.initState();
    _initAnimations();
    _loadAppInfo();
  }

  void _initAnimations() {
    _fadeController = AnimationController(
      duration: const Duration(milliseconds: 800),
      vsync: this,
    );
    _slideController = AnimationController(
      duration: const Duration(milliseconds: 1000),
      vsync: this,
    );

    _fadeAnimation = Tween<double>(begin: 0.0, end: 1.0).animate(
      CurvedAnimation(parent: _fadeController, curve: Curves.easeInOut),
    );

    _slideAnimation =
        Tween<Offset>(begin: const Offset(0, 0.3), end: Offset.zero).animate(
          CurvedAnimation(parent: _slideController, curve: Curves.elasticOut),
        );

    _fadeController.forward();
    Future.delayed(const Duration(milliseconds: 300), () {
      _slideController.forward();
    });
  }

  Future<void> _loadAppInfo() async {
    try {
      final info = await PackageInfo.fromPlatform();
      final deviceInfoPlugin = DeviceInfoPlugin();
      String device = '';

      if (Theme.of(context).platform == TargetPlatform.android) {
        final androidInfo = await deviceInfoPlugin.androidInfo;
        device = '${androidInfo.brand} ${androidInfo.model}';
      } else if (Theme.of(context).platform == TargetPlatform.iOS) {
        final iosInfo = await deviceInfoPlugin.iosInfo;
        device = '${iosInfo.name} ${iosInfo.model}';
      }

      setState(() {
        packageInfo = info;
        deviceInfo = device;
      });
    } catch (e) {
      print('Error loading app info: $e');
    }
  }

  @override
  void dispose() {
    _fadeController.dispose();
    _slideController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: CustomScrollView(
        physics: const BouncingScrollPhysics(),
        slivers: [_buildSliverAppBar(), _buildContent()],
      ),
    );
  }

  Widget _buildSliverAppBar() {
    return SliverAppBar(
      expandedHeight: 280.0,
      pinned: true,
      elevation: 0,
      backgroundColor: AppColor.primary,
      flexibleSpace: FlexibleSpaceBar(
        title: AnimatedBuilder(
          animation: _fadeAnimation,
          builder: (context, child) {
            return Opacity(
              opacity: _fadeAnimation.value,
              child: Text(
                'Tentang Aplikasi',
                style: AppStyle.lg.copyWith(
                  color: AppColor.white,
                  fontWeight: FontWeight.bold,
                ),
              ),
            );
          },
        ),
        background: Container(
          decoration: const BoxDecoration(
            gradient: LinearGradient(
              begin: Alignment.topLeft,
              end: Alignment.bottomRight,
              colors: AppColor.primaryGradient,
            ),
          ),
          child: Stack(
            children: [
              // Background pattern
              Positioned.fill(child: CustomPaint(painter: _PatternPainter())),
              // App icon and version
              Center(
                child: FadeTransition(
                  opacity: _fadeAnimation,
                  child: SlideTransition(
                    position: _slideAnimation,
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: [
                        Container(
                          width: 100,
                          height: 100,
                          decoration: BoxDecoration(
                            color: AppColor.white,
                            borderRadius: BorderRadius.circular(25),
                            boxShadow: [
                              BoxShadow(
                                color: AppColor.black.withOpacity(0.2),
                                blurRadius: 20,
                                offset: const Offset(0, 10),
                              ),
                            ],
                          ),
                          child: Icon(
                            Icons.mobile_friendly,
                            size: 50,
                            color: AppColor.primary,
                          ),
                        ),
                        const SizedBox(height: 16),
                        Text(
                          packageInfo?.appName ?? 'My App',
                          style: AppStyle.h4.copyWith(
                            color: AppColor.white,
                            fontWeight: FontWeight.bold,
                          ),
                        ),
                        const SizedBox(height: 8),
                        Container(
                          padding: const EdgeInsets.symmetric(
                            horizontal: 12,
                            vertical: 6,
                          ),
                          decoration: BoxDecoration(
                            color: AppColor.white.withOpacity(0.2),
                            borderRadius: BorderRadius.circular(20),
                          ),
                          child: Text(
                            'v${packageInfo?.version ?? '1.0.0'}',
                            style: AppStyle.sm.copyWith(
                              color: AppColor.white,
                              fontWeight: FontWeight.w600,
                            ),
                          ),
                        ),
                      ],
                    ),
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
      leading: IconButton(
        icon: const Icon(Icons.arrow_back_ios, color: AppColor.white),
        onPressed: () => context.router.back(),
      ),
    );
  }

  Widget _buildContent() {
    return SliverToBoxAdapter(
      child: FadeTransition(
        opacity: _fadeAnimation,
        child: Container(
          color: AppColor.background,
          child: Column(
            children: [_buildAppInfoSection(), const SizedBox(height: 40)],
          ),
        ),
      ),
    );
  }

  Widget _buildAppInfoSection() {
    return Container(
      margin: const EdgeInsets.all(20),
      padding: const EdgeInsets.all(24),
      decoration: BoxDecoration(
        color: AppColor.white,
        borderRadius: BorderRadius.circular(20),
        boxShadow: [
          BoxShadow(
            color: AppColor.primary.withOpacity(0.1),
            blurRadius: 20,
            offset: const Offset(0, 8),
          ),
        ],
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Container(
                padding: const EdgeInsets.all(12),
                decoration: BoxDecoration(
                  color: AppColor.primary.withOpacity(0.1),
                  borderRadius: BorderRadius.circular(12),
                ),
                child: Icon(
                  Icons.info_outline,
                  color: AppColor.primary,
                  size: 24,
                ),
              ),
              const SizedBox(width: 16),
              Text(
                'Informasi Aplikasi',
                style: AppStyle.h6.copyWith(
                  fontWeight: FontWeight.bold,
                  color: AppColor.primary,
                ),
              ),
            ],
          ),
          const SizedBox(height: 20),
          _buildInfoRow('Nama Aplikasi', packageInfo?.appName ?? 'Loading...'),
          _buildInfoRow('Versi', packageInfo?.version ?? 'Loading...'),
          _buildInfoRow(
            'Build Number',
            packageInfo?.buildNumber ?? 'Loading...',
          ),
          _buildInfoRow(
            'Package Name',
            packageInfo?.packageName ?? 'Loading...',
          ),
          _buildInfoRow(
            'Device',
            deviceInfo.isEmpty ? 'Loading...' : deviceInfo,
          ),
        ],
      ),
    );
  }

  Widget _buildInfoRow(String label, String value) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 8),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          SizedBox(
            width: 120,
            child: Text(
              label,
              style: AppStyle.md.copyWith(
                fontWeight: FontWeight.w600,
                color: AppColor.textSecondary,
              ),
            ),
          ),
          const SizedBox(width: 16),
          Expanded(
            child: Text(
              value,
              style: AppStyle.md.copyWith(color: AppColor.textPrimary),
            ),
          ),
        ],
      ),
    );
  }
}

class _PatternPainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    final paint = Paint()
      ..color = AppColor.white.withOpacity(0.1)
      ..strokeWidth = 1
      ..style = PaintingStyle.stroke;

    // Create geometric pattern
    for (int i = 0; i < 20; i++) {
      for (int j = 0; j < 20; j++) {
        final x = (size.width / 20) * i;
        final y = (size.height / 20) * j;

        if ((i + j) % 3 == 0) {
          canvas.drawCircle(Offset(x, y), 3, paint);
        }
      }
    }
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
}