// lib/screens/learn_more_screen.dart

import 'package:flutter/material.dart';
import '../features/events/models/event_models.dart';
import '../features/events/services/events_service.dart';
import 'booking_screen.dart';

class LearnMoreScreen extends StatefulWidget {
  final int eventId;
  const LearnMoreScreen({Key? key, required this.eventId}) : super(key: key);

  @override
  State<LearnMoreScreen> createState() => _LearnMoreScreenState();
}

class _LearnMoreScreenState extends State<LearnMoreScreen> {
  final EventsService _service = EventsService();

  bool _loading = true;
  EventModel? _event;
  String? _error;

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

  Future<void> _loadEvent() async {
    setState(() {
      _loading = true;
      _error = null;
    });

    try {
      final ev = await _service.getEventDetails(widget.eventId);
      if (!mounted) return;
      setState(() => _event = ev);
    } catch (e) {
      if (!mounted) return;
      setState(() => _error = e.toString());
    } finally {
      if (mounted) setState(() => _loading = false);
    }
  }

  Widget _buildImageCarousel() {
    final imgs = _event?.images ?? [];
    final thumb = _event?.thumbImg;
    final list = <String>[];

    if (thumb != null && thumb.isNotEmpty) list.add(thumb);
    for (final i in imgs) {
      if (i.image.isNotEmpty && !list.contains(i.image)) list.add(i.image);
    }

    if (list.isEmpty) {
      return Container(
        height: 220,
        color: Colors.grey.shade200,
        child: const Center(child: Icon(Icons.event, size: 80, color: Colors.grey)),
      );
    }

    return SizedBox(
      height: 220,
      child: PageView.builder(
        itemCount: list.length,
        itemBuilder: (context, i) => Image.network(list[i], fit: BoxFit.cover, width: double.infinity),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);

    return Scaffold(
      appBar: AppBar(
        title: const Text('Event Details'),
      ),
      body: _loading
          ? const Center(child: CircularProgressIndicator())
          : _error != null
              ? Center(child: Text('Error: $_error'))
              : _event == null
                  ? const Center(child: Text('Event not found'))
                  : SingleChildScrollView(
                      child: DefaultTextStyle.merge(
                        // force child Text widgets to use theme-aware foreground color (works in light/dark)
                        style: TextStyle(color: theme.colorScheme.onSurface, height: 1.45),
                        child: Column(
                          crossAxisAlignment: CrossAxisAlignment.stretch,
                          children: [
                            _buildImageCarousel(),
                            Padding(
                              padding: const EdgeInsets.all(16.0),
                              child: Column(
                                crossAxisAlignment: CrossAxisAlignment.start,
                                children: [
                                  // Title — use theme typography
                                  Text(
                                    _event!.title ?? _event!.name ?? '',
                                    style: theme.textTheme.headlineSmall?.copyWith(fontSize: 22, fontWeight: FontWeight.bold),
                                  ),
                                  const SizedBox(height: 8),

                                  // Meta row (date, location) — icons will use theme icon color
                                  Row(
                                    children: [
                                      Icon(Icons.calendar_today, size: 16, color: theme.iconTheme.color),
                                      const SizedBox(width: 6),
                                      Text(
                                        '${_event!.startDate}${_event!.startTime != null ? ' • ${_event!.startTime}' : ''}',
                                        style: theme.textTheme.bodyMedium,
                                      ),
                                      const SizedBox(width: 12),
                                      Icon(Icons.location_on, size: 16, color: theme.iconTheme.color),
                                      const SizedBox(width: 6),
                                      Flexible(child: Text(_event!.place ?? _event!.venueName ?? '', style: theme.textTheme.bodyMedium)),
                                    ],
                                  ),
                                  const SizedBox(height: 12),

                                  // Description — themed body text (no hardcoded black)
                                  Text(
                                    _event!.description ?? '',
                                    style: theme.textTheme.bodyMedium,
                                  ),
                                  const SizedBox(height: 16),

                                  // Important section (if present)
                                  if ((_event!.importantInformation ?? '').isNotEmpty) ...[
                                    Text('Important', style: theme.textTheme.titleMedium?.copyWith(fontWeight: FontWeight.bold)),
                                    const SizedBox(height: 6),
                                    Text(_event!.importantInformation!, style: theme.textTheme.bodyMedium),
                                    const SizedBox(height: 12),
                                  ],

                                  // Book button
                                  Row(
                                    mainAxisAlignment: MainAxisAlignment.end,
                                    children: [
                                      ElevatedButton(
                                        onPressed: () {
                                          Navigator.push(
                                            context,
                                            MaterialPageRoute(
                                              builder: (_) => BookingScreen(
                                                onBook: () {
                                                  ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('Booked (demo)')));
                                                },
                                                image: _event!.thumbImg ?? '',
                                              ),
                                            ),
                                          );
                                        },
                                        child: const Padding(
                                          padding: EdgeInsets.symmetric(horizontal: 14, vertical: 12),
                                          child: Text('Book Tickets'),
                                        ),
                                      ),
                                    ],
                                  ),
                                ],
                              ),
                            ),
                          ],
                        ),
                      ),
                    ),
    );
  }
}