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

import '../main.dart' show supabase;
import '../widgets/app_gradients.dart';
import '../widgets/entrance.dart';
import '../widgets/liquid_waves_background.dart';
import '../widgets/tap_bounce.dart';
import 'quiz_prefs.dart';
import 'quiz_question_screen.dart' show QuizScore;
import 'quiz_video_guide.dart';

const String _resultGuideYoutubeId = '3q7C7txH1dE';

// Fase 3 tem 27 perguntas no total: 4 são sinais de má oclusão já
// instalados (queixo, boca/dentição, apinhamento, céu da boca) — as
// restantes 23 são fatores de risco associados. Ver o diagrama de
// planeamento partilhado com o utilizador para o racional completo.
const int kSignsMax = 4;
const int kFactorsMax = 23;

/// A partir de quantos sinais/fatores presentes se recomenda avaliação.
/// Proposta: qualquer sinal já instalado, ou ao menos ~30% dos fatores de
/// risco — ajustável depois de validar com dados reais.
bool _recommendsEvaluation(QuizScore score) {
  return score.signs >= 1 || score.factors >= (kFactorsMax * 0.3).ceil();
}

class QuizResultScreen extends StatefulWidget {
  const QuizResultScreen({super.key, required this.finalScore, this.scopeId});

  final QuizScore finalScore;
  final String? scopeId;

  @override
  State<QuizResultScreen> createState() => _QuizResultScreenState();
}

class _QuizResultScreenState extends State<QuizResultScreen> {
  late final Future<void> _saveResultFuture;

  @override
  void initState() {
    super.initState();
    _saveResultFuture = _saveResult();
  }

  Future<void> _saveResult() async {
    QuizPrefs.markQuizSeen();
    final result = QuizResultData(
      signs: widget.finalScore.signs,
      signsMax: kSignsMax,
      factors: widget.finalScore.factors,
      factorsMax: kFactorsMax,
    );
    final scope = (widget.scopeId ?? '').trim();
    if (scope.isNotEmpty) {
      await QuizPrefs.saveLastResultForScope(scopeId: scope, result: result);
    } else {
      final uid = supabase.auth.currentUser?.id;
      if (uid != null && uid.trim().isNotEmpty) {
        await QuizPrefs.saveLastResultForUser(userId: uid, result: result);
      } else {
        await QuizPrefs.saveLastResult(result);
      }
    }

    final uid = supabase.auth.currentUser?.id;
    final userId = (uid ?? '').trim();
    if (userId.isNotEmpty &&
        scope.isNotEmpty &&
        scope.startsWith('${userId}_')) {
      final childId = scope.substring(userId.length + 1).trim();
      if (childId.isNotEmpty) {
        // Fire-and-forget: avoid blocking UI on erros de rede. Requer as
        // colunas last_signs/last_signs_max/last_factors/last_factors_max
        // na tabela children — se ainda não existirem na base de dados,
        // esta chamada falha silenciosamente e o resultado fica só local
        // (SharedPreferences, acima), tal como já acontecia antes.
        unawaited(
          supabase
              .from('children')
              .update({
                'last_signs': widget.finalScore.signs,
                'last_signs_max': kSignsMax,
                'last_factors': widget.finalScore.factors,
                'last_factors_max': kFactorsMax,
              })
              .eq('id', childId)
              .catchError((e) {
                debugPrint(
                  '[QuizResult] Falha ao gravar score na base de dados: $e',
                );
              }),
        );
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    final recommend = _recommendsEvaluation(widget.finalScore);

    return Scaffold(
      body: Stack(
        clipBehavior: Clip.none,
        children: [
          Positioned.fill(child: Container(color: const Color(0xFFFAFAF7))),
          const LiquidWavesBackground(),
          SafeArea(
            child: Center(
              child: ConstrainedBox(
                constraints: const BoxConstraints(maxWidth: 520),
                child: Padding(
                  padding: const EdgeInsets.fromLTRB(22, 12, 22, 18),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.stretch,
                    children: [
                      Align(
                        alignment: Alignment.centerRight,
                        child: TextButton(
                          onPressed: () =>
                              Navigator.of(context).popUntil((r) => r.isFirst),
                          child: const Text(''),
                        ),
                      ),
                      Expanded(
                        child: Center(
                          child: SingleChildScrollView(
                            child: Column(
                              mainAxisSize: MainAxisSize.min,
                              children: [
                                const SizedBox(height: 6),
                                FadeSlideIn(
                                  child: const QuizGuideVideoCard(
                                    youtubeId: _resultGuideYoutubeId,
                                  ),
                                ),
                                const SizedBox(height: 22),
                                FadeSlideIn(
                                  delay: const Duration(milliseconds: 60),
                                  child: const Text(
                                    'Resultado da avaliação',
                                    textAlign: TextAlign.center,
                                    style: TextStyle(
                                      fontSize: 18,
                                      fontWeight: FontWeight.w900,
                                      color: Color(0xFFFF55A7),
                                      height: 1.2,
                                    ),
                                  ),
                                ),
                                const SizedBox(height: 18),
                                FadeSlideIn(
                                  delay: const Duration(milliseconds: 100),
                                  child: Row(
                                    mainAxisAlignment:
                                        MainAxisAlignment.spaceEvenly,
                                    children: [
                                      _ResultRing(
                                        value: widget.finalScore.signs,
                                        max: kSignsMax,
                                        color: const Color(0xFF2F9E94),
                                        label:
                                            'Sinais de má\noclusão instalados',
                                      ),
                                      _ResultRing(
                                        value: widget.finalScore.factors,
                                        max: kFactorsMax,
                                        color: const Color(0xFFFF55A7),
                                        label: 'Fatores de\nrisco associados',
                                      ),
                                    ],
                                  ),
                                ),
                                const SizedBox(height: 20),
                                FadeSlideIn(
                                  delay: const Duration(milliseconds: 120),
                                  child: Text(
                                    'Conclusões:',
                                    textAlign: TextAlign.center,
                                    style: TextStyle(
                                      color: Colors.black.withValues(
                                        alpha: 0.75,
                                      ),
                                      fontWeight: FontWeight.w900,
                                    ),
                                  ),
                                ),
                                const SizedBox(height: 10),
                                FadeSlideIn(
                                  delay: const Duration(milliseconds: 160),
                                  child: Text(
                                    recommend
                                        ? 'Recomenda-se o agendamento de uma consulta com um dentista/ortodontista.\nEsta avaliação é apenas educativa.'
                                        : 'Não foram encontrados sinais ou fatores de risco relevantes.\nEsta avaliação é apenas educativa.',
                                    textAlign: TextAlign.center,
                                    style: TextStyle(
                                      color: Colors.black.withValues(
                                        alpha: 0.70,
                                      ),
                                      fontWeight: FontWeight.w600,
                                      height: 1.25,
                                    ),
                                  ),
                                ),
                              ],
                            ),
                          ),
                        ),
                      ),
                      Center(
                        child: TapBounce(
                          child: ClipRRect(
                            borderRadius: BorderRadius.circular(999),
                            child: DecoratedBox(
                              decoration: const BoxDecoration(
                                gradient: kGreenButtonGradient,
                              ),
                              child: SizedBox(
                                width: 260,
                                height: 46,
                                child: FilledButton(
                                  style: FilledButton.styleFrom(
                                    backgroundColor: Colors.transparent,
                                    foregroundColor: Colors.white,
                                    shape: const StadiumBorder(),
                                    textStyle: const TextStyle(
                                      fontWeight: FontWeight.w900,
                                    ),
                                  ),
                                  onPressed: () async {
                                    await _saveResultFuture;
                                    if (!context.mounted) return;
                                    Navigator.of(
                                      context,
                                    ).popUntil((r) => r.isFirst);
                                  },
                                  child: const Text('Avançar'),
                                ),
                              ),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }
}

class _ResultRing extends StatelessWidget {
  const _ResultRing({
    required this.value,
    required this.max,
    required this.color,
    required this.label,
  });

  final int value;
  final int max;
  final Color color;
  final String label;

  @override
  Widget build(BuildContext context) {
    final progress = max > 0 ? (value / max).clamp(0.0, 1.0) : 0.0;
    return Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        TweenAnimationBuilder<double>(
          duration: const Duration(milliseconds: 1100),
          curve: Curves.easeOutCubic,
          tween: Tween<double>(begin: 0, end: progress),
          builder: (context, animatedProgress, _) {
            return SizedBox(
              width: 150,
              height: 150,
              child: Stack(
                alignment: Alignment.center,
                children: [
                  SizedBox(
                    width: 132,
                    height: 132,
                    child: CircularProgressIndicator(
                      value: animatedProgress,
                      strokeWidth: 12,
                      backgroundColor: Colors.black.withValues(alpha: 0.10),
                      valueColor: AlwaysStoppedAnimation(color),
                    ),
                  ),
                  Text(
                    '$value/$max',
                    style: const TextStyle(
                      fontSize: 22,
                      fontWeight: FontWeight.w900,
                      color: Colors.black,
                    ),
                  ),
                ],
              ),
            );
          },
        ),
        const SizedBox(height: 10),
        Text(
          label,
          textAlign: TextAlign.center,
          style: TextStyle(
            fontSize: 12.5,
            fontWeight: FontWeight.w800,
            color: Colors.black.withValues(alpha: 0.65),
            height: 1.25,
          ),
        ),
      ],
    );
  }
}