import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:url_launcher/url_launcher.dart';
import '../../../core/network/api_client.dart';
import '../../../core/theme/app_theme.dart';
import '../../../core/widgets/status_badge.dart';
import '../../asset_detail/views/asset_detail_screen.dart';
import '../../favorites/cubit/favorites_cubit.dart';
import '../models/news_article_model.dart';
import '../repositories/news_repository.dart';
import 'finbert_sentiment_tab.dart';

class ArticleSentimentDialog extends StatefulWidget {
  final NewsArticleModel articleData;
  final ApiClient? apiClient;
  final ValueChanged<NewsArticleModel>? onArticleUpdated;

  const ArticleSentimentDialog({
    super.key,
    required this.articleData,
    this.apiClient,
    this.onArticleUpdated,
  });

  @override
  State<ArticleSentimentDialog> createState() => _ArticleSentimentDialogState();
}

class _ArticleSentimentDialogState extends State<ArticleSentimentDialog> with SingleTickerProviderStateMixin {
  late TabController _tabController;
  late NewsArticleModel _currentArticle;
  bool _isReanalyzing = false;
  String? _reanalyzeError;

  @override
  void initState() {
    super.initState();
    _currentArticle = widget.articleData;
    _tabController = TabController(length: 2, vsync: this);
  }

  @override
  void dispose() {
    _tabController.dispose();
    super.dispose();
  }

  void _openOriginalSource() async {
    final urlStr = _currentArticle.sourceUrl;
    if (urlStr.isNotEmpty) {
      final uri = Uri.parse(urlStr);
      if (await canLaunchUrl(uri)) {
        await launchUrl(uri, mode: LaunchMode.externalApplication);
      }
    }
  }

  Future<void> _reanalyzeSentiment() async {
    if (_isReanalyzing || _currentArticle.id.isEmpty) return;

    setState(() {
      _isReanalyzing = true;
      _reanalyzeError = null;
    });

    try {
      final client = widget.apiClient ?? context.read<ApiClient>();
      final repo = NewsRepository(apiClient: client, backendUrl: ApiClient.baseUrl);
      final updatedArticle = await repo.reanalyzeArticle(_currentArticle.id);

      if (mounted) {
        setState(() {
          _currentArticle = updatedArticle;
          _isReanalyzing = false;
        });

        widget.onArticleUpdated?.call(updatedArticle);

        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Row(
              children: [
                Icon(Icons.check_circle, color: AppTheme.primaryEmerald, size: 20),
                const SizedBox(width: 8),
                const Text('Sentiment-Analyse erfolgreich erneuert!'),
              ],
            ),
            backgroundColor: AppTheme.cardSurface,
            duration: const Duration(seconds: 3),
          ),
        );
      }
    } catch (e) {
      if (mounted) {
        setState(() {
          _isReanalyzing = false;
          _reanalyzeError = e.toString();
        });
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    final article = _currentArticle;
    final title = article.title.isNotEmpty ? article.title : 'Nachrichtenartikel';
    final author = article.author.isNotEmpty ? article.author : 'Finlytic News';
    final summary = article.summary;
    final sourceUrl = article.sourceUrl;
    final contentRaw = article.contentRaw;
    final publishedAt = "${article.publishedAt.day.toString().padLeft(2, '0')}.${article.publishedAt.month.toString().padLeft(2, '0')}.${article.publishedAt.year}";
    final status = article.status.isNotEmpty ? article.status : 'Completed';
    final rawSentiment = article.sentiment;

    final compoundScore = article.finbertResult?.score ?? article.sentimentScore;

    final Widget listBadge = rawSentiment.isNotEmpty
        ? StatusBadge.sentiment(rawSentiment.toUpperCase(), score: compoundScore)
        : StatusBadge(
            label: status.toUpperCase(),
            color: status.toLowerCase().contains('analyz') ? AppTheme.primaryEmerald : AppTheme.accentCyan,
          );

    final client = widget.apiClient ?? (context.mounted ? context.read<ApiClient>() : null);
    final favourites = context.read<FavoritesCubit>().state.favoriteDetails;

    return Dialog(
      backgroundColor: AppTheme.cardSurface,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(16),
        side: BorderSide(color: AppTheme.glassBorder),
      ),
      child: Container(
        width: 720,
        height: 640,
        padding: const EdgeInsets.all(20),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            // Header
            Row(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Expanded(
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        title,
                        style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 16, color: Colors.white),
                        maxLines: 2,
                        overflow: TextOverflow.ellipsis,
                      ),
                      const SizedBox(height: 6),
                      Text(
                        'Quelle: $author • $publishedAt',
                        style: TextStyle(color: AppTheme.textMuted, fontSize: 12),
                      ),
                    ],
                  ),
                ),
                const SizedBox(width: 12),
                Row(
                  mainAxisSize: MainAxisSize.min,
                  crossAxisAlignment: CrossAxisAlignment.center,
                  children: [
                    // Sentiment Reanalyze Icon Button (directly left of badge)
                    IconButton(
                      tooltip: 'KI-Sentiment neu analysieren',
                      onPressed: _isReanalyzing ? null : _reanalyzeSentiment,
                      icon: _isReanalyzing
                          ? SizedBox(
                              width: 14,
                              height: 14,
                              child: CircularProgressIndicator(strokeWidth: 2, color: AppTheme.accentCyan),
                            )
                          : Icon(Icons.auto_awesome, size: 18, color: AppTheme.accentCyan),
                      padding: const EdgeInsets.all(6),
                      constraints: const BoxConstraints(),
                    ),
                    const SizedBox(width: 6),
                    listBadge,
                    const SizedBox(width: 8),
                    IconButton(
                      onPressed: () => Navigator.pop(context),
                      icon: const Icon(Icons.close, color: Colors.white70, size: 20),
                      padding: EdgeInsets.zero,
                      constraints: const BoxConstraints(),
                    ),
                  ],
                ),
              ],
            ),
            if (_reanalyzeError != null) ...[
              const SizedBox(height: 8),
              Container(
                padding: const EdgeInsets.all(8),
                decoration: BoxDecoration(
                  color: AppTheme.accentRed.withValues(alpha: 0.15),
                  borderRadius: BorderRadius.circular(6),
                  border: Border.all(color: AppTheme.accentRed.withValues(alpha: 0.4)),
                ),
                child: Row(
                  children: [
                    Icon(Icons.error_outline, size: 16, color: AppTheme.accentRed),
                    const SizedBox(width: 6),
                    Expanded(
                      child: Text(
                        _reanalyzeError!,
                        style: TextStyle(color: AppTheme.accentRed, fontSize: 11),
                      ),
                    ),
                  ],
                ),
              ),
            ],
            const SizedBox(height: 12),

            // Tab Bar
            Container(
              decoration: BoxDecoration(
                color: AppTheme.glassSurface,
                borderRadius: BorderRadius.circular(10),
                border: Border.all(color: AppTheme.glassBorder),
              ),
              child: TabBar(
                controller: _tabController,
                indicatorColor: AppTheme.primaryEmerald,
                labelColor: AppTheme.primaryEmerald,
                unselectedLabelColor: AppTheme.textMuted,
                indicatorSize: TabBarIndicatorSize.tab,
                tabs: const [
                  Tab(icon: Icon(Icons.article_outlined, size: 18), text: 'Artikel & Assets'),
                  Tab(icon: Icon(Icons.psychology_outlined, size: 18), text: 'FinBERT KI-Sentiment'),
                ],
              ),
            ),
            const SizedBox(height: 12),

            // Tab Views
            Expanded(
              child: TabBarView(
                controller: _tabController,
                children: [
                  SingleChildScrollView(
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        if (summary.isNotEmpty) ...[
                          const Text('Zusammenfassung:', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 13, color: Colors.white)),
                          const SizedBox(height: 6),
                          Container(
                            width: double.infinity,
                            padding: const EdgeInsets.all(12),
                            decoration: BoxDecoration(
                              color: AppTheme.glassSurface,
                              borderRadius: BorderRadius.circular(8),
                              border: Border.all(color: AppTheme.glassBorder),
                            ),
                            child: Text(summary, style: const TextStyle(color: Colors.white70, fontSize: 13, height: 1.4)),
                          ),
                          const SizedBox(height: 14),
                        ],
                        if (article.matchedAssets.isNotEmpty) ...[
                          Row(
                            children: [
                              const Text('Erkannte Unternehmen & Assets:', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 13, color: Colors.white)),
                              const SizedBox(width: 6),
                              Text('(Klick öffnet Asset-Details)', style: TextStyle(color: AppTheme.textMuted, fontSize: 11)),
                            ],
                          ),
                          const SizedBox(height: 8),
                          Wrap(
                            spacing: 8,
                            runSpacing: 8,
                            children: article.matchedAssets.map((asset) {
                              final isin = asset.isin;
                              final name = asset.name.isNotEmpty ? asset.name : (asset.symbol.isNotEmpty ? asset.symbol : isin);
                              final match = favourites.where((e) => e.isin == isin);
                              final symbol = match.isEmpty ? null : match.first;

                              return ActionChip(
                                avatar: Icon(Icons.open_in_new, size: 14, color: AppTheme.accentCyan),
                                label: Text(
                                  name,
                                  style: TextStyle(
                                    fontSize: 12,
                                    fontWeight: FontWeight.bold,
                                    color: AppTheme.accentCyan,
                                  ),
                                ),
                                backgroundColor: AppTheme.accentCyan.withValues(alpha: 0.1),
                                side: BorderSide(color: AppTheme.accentCyan.withValues(alpha: 0.35)),
                                padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
                                onPressed: () {
                                  if (client != null && isin.isNotEmpty) {
                                    Navigator.push(
                                      context,
                                      MaterialPageRoute(
                                        builder: (_) => AssetDetailScreen(
                                          isin: isin,
                                          name: name,
                                          symbol: symbol != null ? symbol.symbol : asset.symbol,
                                          apiClient: client,
                                        ),
                                      ),
                                    );
                                  }
                                },
                              );
                            }).toList(),
                          ),
                          const SizedBox(height: 14),
                        ],
                        const Text('Vollständiger Artikeltext:', style: TextStyle(fontWeight: FontWeight.bold, fontSize: 13, color: Colors.white)),
                        const SizedBox(height: 6),
                        Container(
                          width: double.infinity,
                          padding: const EdgeInsets.all(12),
                          decoration: BoxDecoration(
                            color: Colors.black.withValues(alpha: 0.2),
                            borderRadius: BorderRadius.circular(8),
                            border: Border.all(color: AppTheme.glassBorder),
                          ),
                          child: Text(
                            contentRaw.isNotEmpty ? contentRaw : (summary.isNotEmpty ? summary : 'Kein vollständiger Text verfügbar.'),
                            style: const TextStyle(color: Colors.white70, fontSize: 13, height: 1.5),
                          ),
                        ),
                      ],
                    ),
                  ),
                  FinbertSentimentTab(article: article),
                ],
              ),
            ),
            const SizedBox(height: 12),

            // Footer
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                if (sourceUrl.isNotEmpty)
                  TextButton.icon(
                    onPressed: _openOriginalSource,
                    icon: const Icon(Icons.open_in_new, size: 16),
                    label: const Text('Originalquelle im Web öffnen'),
                    style: TextButton.styleFrom(foregroundColor: AppTheme.accentCyan),
                  )
                else
                  const SizedBox.shrink(),
                ElevatedButton(
                  onPressed: () => Navigator.pop(context),
                  style: ElevatedButton.styleFrom(
                    backgroundColor: AppTheme.primaryEmerald,
                    foregroundColor: Colors.black,
                    padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 10),
                    shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
                  ),
                  child: const Text('Schließen', style: TextStyle(fontWeight: FontWeight.bold)),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}