import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:lucide_icons/lucide_icons.dart';
import '../theme/app_colors.dart';

class OnboardingDialog extends StatefulWidget {
  final VoidCallback onFinish;
  final List<Map<String, dynamic>>? pages; // Support dynamic for IconData

  const OnboardingDialog({super.key, required this.onFinish, this.pages});

  @override
  State<OnboardingDialog> createState() => _OnboardingDialogState();
}

class _OnboardingDialogState extends State<OnboardingDialog> {
  final PageController _controller = PageController();
  int _currentPage = 0;

  late final List<Map<String, dynamic>> _pages;

  @override
  void initState() {
    super.initState();
    _pages = widget.pages ?? [
      {
        'title': '日本酒の『魂』を保存する',
        'description': 'Ponshu Roomへようこそ。\n飲んだ日本酒のラベルを撮影するだけで、\nAIが情報を解析し、あなたのリストに加えます。',
        'icon': '🍶',
      },
      {
        'title': 'ラベルを撮るだけ',
        'description': '面倒な入力は不要です。\nラベルの写真を撮れば、銘柄、蔵元、味わいまで\nAIが自動でデータベース化します。',
        'icon': LucideIcons.camera,
      },
      {
        'title': 'あなただけのお品書き',
        'description': '集めたコレクションから、\nボタンひとつで美しいお品書きPDFを作成。\n飲食店の方も、個人の方も楽しめます。',
        'icon': LucideIcons.scrollText,
      },
      {
        'title': 'さあ、始めましょう',
        'description': 'AIの力で、日本酒ライフをもっと豊かに。\n右下のカメラボタンからスタートしてください。',
        'icon': LucideIcons.sparkles,
      },
    ];
  }

  @override
  Widget build(BuildContext context) {
    final appColors = Theme.of(context).extension<AppColors>()!;
    return Dialog(
      backgroundColor: Colors.transparent, // Custom shape
      insetPadding: const EdgeInsets.all(20),
      child: Stack(
        clipBehavior: Clip.none,
        alignment: Alignment.center,
        children: [
          Container(
            height: 500,
            decoration: BoxDecoration(
              color: Theme.of(context).scaffoldBackgroundColor,
              borderRadius: BorderRadius.circular(24),
              boxShadow: [
                BoxShadow(
                  color: Colors.black.withValues(alpha: 0.3),
                  blurRadius: 20,
                  offset: const Offset(0, 10),
                )
              ],
            ),
            child: Column(
              children: [
                Expanded(
                  child: PageView.builder(
                    controller: _controller,
                    onPageChanged: (index) => setState(() => _currentPage = index),
                    itemCount: _pages.length,
                    itemBuilder: (context, index) {
                      final page = _pages[index];
                      final iconData = page['icon'];
                      
                      return Center(
                        child: SingleChildScrollView(
                          child: Padding(
                            padding: const EdgeInsets.all(32.0),
                            child: Column(
                              mainAxisAlignment: MainAxisAlignment.center,
                              children: [
                                if (iconData is IconData)
                                  Icon(iconData, size: 80, color: Theme.of(context).brightness == Brightness.dark ? Colors.white : Theme.of(context).primaryColor)
                                else
                                  Text(
                                    iconData.toString(),
                                    style: const TextStyle(fontSize: 80),
                                  ),
                                const SizedBox(height: 32),
                                Text(
                                  page['title']!,
                                  textAlign: TextAlign.center,
                                  style: GoogleFonts.zenOldMincho(
                                    fontSize: 24,
                                    fontWeight: FontWeight.bold,
                                    color: Theme.of(context).textTheme.bodyLarge?.color,
                                  ),
                                ),
                                const SizedBox(height: 16),
                                Text(
                                  page['description']!,
                                  textAlign: TextAlign.center,
                                  style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                                    height: 1.6,
                                    color: appColors.textSecondary,
                                  ),
                                ),
                              ],
                            ),
                          ),
                        ),
                      );
                    },
                  ),
                ),
                // Indicators
                Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: List.generate(_pages.length, (index) {
                    return AnimatedContainer(
                      duration: const Duration(milliseconds: 300),
                      margin: const EdgeInsets.symmetric(horizontal: 4),
                      height: 8,
                      width: _currentPage == index ? 24 : 8,
                      decoration: BoxDecoration(
                        color: _currentPage == index 
                            ? Theme.of(context).primaryColor 
                            : appColors.textSecondary,
                        borderRadius: BorderRadius.circular(4),
                      ),
                    );
                  }),
                ),
                const SizedBox(height: 24),
                // Button
                Padding(
                  padding: const EdgeInsets.symmetric(horizontal: 32.0, vertical: 24.0),
                  child: SizedBox(
                    width: double.infinity,
                    height: 50,
                    child: ElevatedButton(
                      style: ElevatedButton.styleFrom(
                        elevation: 0,
                        backgroundColor: appColors.brandPrimary,
                        foregroundColor: appColors.surfaceSubtle,
                        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
                      ),
                      onPressed: () {
                        if (_currentPage < _pages.length - 1) {
                          _controller.nextPage(
                            duration: const Duration(milliseconds: 300),
                            curve: Curves.easeIn,
                          );
                        } else {
                          widget.onFinish();
                        }
                      },
                      child: Text(
                        _currentPage < _pages.length - 1 ? '次へ' : 'はじめる',
                        style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 16),
                      ),
                    ),
                  ),
                ),
              ],
            ),
          ),
          // Close Button
          Positioned(
            top: -12,
            right: -12,
            child: GestureDetector(
              onTap: widget.onFinish,
              child: Container(
                padding: const EdgeInsets.all(8),
                decoration: BoxDecoration(
                  color: Theme.of(context).scaffoldBackgroundColor,
                  shape: BoxShape.circle,
                  boxShadow: [
                    BoxShadow(
                      color: Colors.black.withValues(alpha: 0.2),
                      blurRadius: 8,
                      offset: const Offset(0, 4),
                    )
                  ],
                ),
                child: const Icon(LucideIcons.x, size: 24),
              ),
            ),
          ),
        ],
      ),
    );
  }
}