import 'dart:async';
import 'dart:convert';

import 'package:flutter/material.dart';

import '../application/application.dart';
import '../domain/domain.dart';
import 'history_screen.dart';
import 'theme.dart';

enum WorkoutExecutionMode { active, rest, paused, finished }

final class WorkoutExecutionScreen extends StatefulWidget {
  const WorkoutExecutionScreen({
    required this.initialSession,
    required this.activeUseCases,
    required this.closeUseCase,
    required this.historyUseCases,
    required this.workoutTemplateUseCases,
    super.key,
  });

  final ActiveWorkoutSession initialSession;
  final ActiveWorkoutSessionUseCases activeUseCases;
  final CloseWorkoutSessionUseCase closeUseCase;
  final WorkoutHistoryUseCases historyUseCases;
  final WorkoutTemplateUseCases workoutTemplateUseCases;

  @override
  State<WorkoutExecutionScreen> createState() => _WorkoutExecutionScreenState();
}

final class _WorkoutExecutionScreenState extends State<WorkoutExecutionScreen> {
  late ActiveWorkoutSession _session;
  late final WorkoutExecutionPlan _plan;
  late WorkoutExecutionMode _mode;
  Timer? _ticker;
  Timer? _restTicker;
  WorkoutHistory? _completedHistory;
  String? _activeRestStateId;
  late DateTime _seriesStartedAt;
  var _reps = 0;
  final _scoreController = TextEditingController();
  var _remainingRestSeconds = 0;

  ExecutionPosition get _position => ExecutionPosition(
    programIndex: _session.currentProgramIndex,
    exerciseIndex: _session.currentExerciseIndex,
    setIndex: _session.currentSetIndex,
  );

  ExecutionExercise get _exercise => _plan.exerciseAt(_position);

  @override
  void initState() {
    super.initState();
    _session = widget.initialSession;
    _plan = WorkoutExecutionPlan.fromSession(_session);
    _mode = _session.status == ActiveWorkoutStatus.running
        ? WorkoutExecutionMode.active
        : WorkoutExecutionMode.paused;
    _seriesStartedAt = DateTime.now().toUtc();
    _ticker = Timer.periodic(const Duration(seconds: 1), (_) {
      if (mounted) setState(() {});
    });
    unawaited(_restoreActiveRest());
  }

  @override
  void dispose() {
    _ticker?.cancel();
    _restTicker?.cancel();
    _scoreController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return PopScope(
      canPop: false,
      onPopInvoked: _handleSystemBack,
      child: Scaffold(
        appBar: AppBar(
          automaticallyImplyLeading: false,
          leading: _canPauseFromNavigation
              ? IconButton(
                  tooltip: 'Mettre en pause',
                  onPressed: () => unawaited(_pause()),
                  icon: const Icon(Icons.arrow_back),
                )
              : null,
          title: Text(_plan.name),
          actions: [
            IconButton(
              tooltip: 'Voir le plan',
              onPressed: _openWorkoutPlan,
              icon: const Icon(Icons.list_alt),
            ),
            TextButton(onPressed: _pause, child: const Text('Pause')),
          ],
        ),
        body: switch (_mode) {
          WorkoutExecutionMode.active => _buildActive(),
          WorkoutExecutionMode.rest => _buildRest(),
          WorkoutExecutionMode.paused => _buildPaused(),
          WorkoutExecutionMode.finished => _buildFinished(),
        },
      ),
    );
  }

  Widget _buildActive() {
    return ListView(
      padding: const EdgeInsets.all(16),
      children: [
        _Header(
          elapsedLabel: _formatDuration(
            Duration(
              milliseconds: widget.activeUseCases.elapsedActiveMilliseconds(
                _session,
              ),
            ),
          ),
          progressLabel: _plan.progressLabel(_position),
        ),
        const SizedBox(height: 24),
        _SeriesCounterCard(
          currentSet: _position.setIndex + 1,
          totalSets: _exercise.setsCount,
        ),
        const SizedBox(height: 16),
        Text(_exercise.name, style: Theme.of(context).textTheme.headlineMedium),
        if (_exercise.hasMedia) ...[
          const SizedBox(height: 12),
          Align(
            alignment: Alignment.centerLeft,
            child: Tooltip(
              message: 'Voir les médias de l’exercice',
              child: OutlinedButton.icon(
                onPressed: () => _openExerciseMedia(_exercise),
                icon: const Icon(Icons.perm_media_outlined),
                label: const Text('Voir médias'),
              ),
            ),
          ),
        ],
        const SizedBox(height: 16),
        SetMeasureInput(
          exercise: _exercise,
          reps: _reps,
          scoreController: _scoreController,
          onRepsChanged: (value) => setState(() => _reps = value),
        ),
        const SizedBox(height: 24),
        FilledButton(
          onPressed: () => _finishSet(skipped: false),
          style: FilledButton.styleFrom(minimumSize: const Size.fromHeight(56)),
          child: const Text('Terminer la série'),
        ),
        const SizedBox(height: 12),
        OutlinedButton(
          onPressed: () => _finishSet(skipped: true),
          style: OutlinedButton.styleFrom(
            minimumSize: const Size.fromHeight(52),
          ),
          child: const Text('Passer'),
        ),
      ],
    );
  }

  Widget _buildRest() {
    final next = _plan.nextPosition(_position);
    final nextExercise = next == null ? null : _plan.exerciseAt(next);
    return Padding(
      padding: const EdgeInsets.all(24),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          const Text('Repos avant la prochaine série'),
          const SizedBox(height: 24),
          Center(
            child: Text(
              _formatDuration(Duration(seconds: _remainingRestSeconds)),
              style: AppTextStyles.timer(context),
            ),
          ),
          if (next != null && nextExercise != null) ...[
            const SizedBox(height: 24),
            Text('Ensuite : ${nextExercise.name}', textAlign: TextAlign.center),
            const SizedBox(height: 8),
            Text(
              'Série ${next.setIndex + 1} / ${nextExercise.setsCount}',
              textAlign: TextAlign.center,
              style: Theme.of(context).textTheme.displaySmall?.copyWith(
                color: Theme.of(context).colorScheme.primary,
                fontSize: 30,
              ),
            ),
            if (nextExercise.hasMedia) ...[
              const SizedBox(height: 12),
              Center(
                child: Tooltip(
                  message: 'Voir les médias de l’exercice',
                  child: OutlinedButton.icon(
                    onPressed: () => _openExerciseMedia(nextExercise),
                    icon: const Icon(Icons.perm_media_outlined),
                    label: const Text('Voir médias'),
                  ),
                ),
              ),
            ],
          ],
          const Spacer(),
          Row(
            children: [
              Expanded(
                child: OutlinedButton(
                  onPressed: () => _adjustRest(-15),
                  child: const Text('-15 s'),
                ),
              ),
              const SizedBox(width: 12),
              Expanded(
                child: OutlinedButton(
                  onPressed: () => _adjustRest(15),
                  child: const Text('+15 s'),
                ),
              ),
            ],
          ),
          const SizedBox(height: 12),
          FilledButton(
            onPressed: _skipRest,
            style: FilledButton.styleFrom(
              minimumSize: const Size.fromHeight(52),
            ),
            child: const Text('Ignorer le repos'),
          ),
          const SizedBox(height: 12),
          TextButton(onPressed: _pause, child: const Text('Pause')),
        ],
      ),
    );
  }

  Widget _buildPaused() {
    return Padding(
      padding: const EdgeInsets.all(24),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          Text('Pause', style: Theme.of(context).textTheme.headlineMedium),
          const SizedBox(height: 24),
          FilledButton(
            onPressed: _resume,
            style: FilledButton.styleFrom(
              minimumSize: const Size.fromHeight(56),
            ),
            child: const Text('Reprendre'),
          ),
          const SizedBox(height: 12),
          OutlinedButton(
            onPressed: _quitAndSave,
            child: const Text('Quitter et sauvegarder'),
          ),
          const Spacer(),
          TextButton(
            onPressed: _confirmAbandon,
            child: const Text('Abandonner la séance'),
          ),
        ],
      ),
    );
  }

  Widget _buildFinished() {
    final elapsed = Duration(
      milliseconds: widget.activeUseCases.elapsedActiveMilliseconds(_session),
    );
    return Padding(
      padding: const EdgeInsets.all(24),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          Text(
            'Séance terminée',
            style: Theme.of(context).textTheme.headlineMedium,
          ),
          const SizedBox(height: 12),
          Text('Temps total : ${_formatDuration(elapsed)}'),
          const SizedBox(height: 24),
          OutlinedButton(
            onPressed: _completedHistory == null ? null : _openHistoryDetail,
            child: const Text('Voir le détail'),
          ),
          OutlinedButton(
            onPressed: _completedHistory == null ? null : _restartCompleted,
            child: const Text('Relancer cette séance'),
          ),
          FilledButton(
            onPressed: () {
              Navigator.of(context).popUntil((route) => route.isFirst);
            },
            child: const Text('Retour à l’accueil'),
          ),
        ],
      ),
    );
  }

  Future<void> _openExerciseMedia(ExecutionExercise exercise) async {
    if (!exercise.hasMedia) {
      return;
    }
    await showModalBottomSheet<void>(
      context: context,
      isScrollControlled: true,
      useSafeArea: true,
      builder: (context) => _ExerciseMediaSheet(
        exercise: exercise,
        restRemainingSeconds: _mode == WorkoutExecutionMode.rest
            ? _remainingRestSeconds
            : null,
      ),
    );
  }

  bool get _canPauseFromNavigation {
    return _mode == WorkoutExecutionMode.active ||
        _mode == WorkoutExecutionMode.rest;
  }

  void _handleSystemBack(bool didPop) {
    if (didPop || !_canPauseFromNavigation) return;
    unawaited(_pause());
  }

  Future<void> _pause() async {
    _restTicker?.cancel();
    _session = await widget.activeUseCases.pause(_session.metadata.id);
    if (!mounted) return;
    setState(() => _mode = WorkoutExecutionMode.paused);
  }

  Future<void> _resume() async {
    _session = await widget.activeUseCases.resume(_session.metadata.id);
    if (!mounted) return;
    final restoredRest = await _restoreActiveRest();
    if (!mounted || restoredRest) return;
    setState(() => _mode = WorkoutExecutionMode.active);
  }

  Future<void> _quitAndSave() async {
    await widget.activeUseCases.quitAndSave(_session.metadata.id);
    if (!mounted) return;
    Navigator.of(context).popUntil((route) => route.isFirst);
  }

  Future<void> _confirmAbandon() async {
    final confirmed = await showDialog<bool>(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('Abandonner la séance ?'),
        content: const Text('Cette action est définitive.'),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(context).pop(false),
            child: const Text('Annuler'),
          ),
          FilledButton(
            onPressed: () => Navigator.of(context).pop(true),
            child: const Text('Abandonner'),
          ),
        ],
      ),
    );
    if (confirmed != true) return;
    await widget.activeUseCases.abandon(_session.metadata.id);
    if (!mounted) return;
    Navigator.of(context).popUntil((route) => route.isFirst);
  }

  Future<void> _openWorkoutPlan() async {
    final setStates = await widget.activeUseCases.listSetResults(
      _session.metadata.id,
    );
    final activeRest = await widget.activeUseCases.findActiveRest(
      sessionId: _session.metadata.id,
    );
    if (!mounted) return;
    await showModalBottomSheet<void>(
      context: context,
      isScrollControlled: true,
      useSafeArea: true,
      builder: (context) => FractionallySizedBox(
        heightFactor: 1,
        child: _WorkoutPlanSheet(
          sessionId: _session.metadata.id,
          plan: _plan,
          currentPosition: _position,
          setStates: setStates,
          activeRest: activeRest,
          activeUseCases: widget.activeUseCases,
        ),
      ),
    );
  }

  Future<void> _finishSet({required bool skipped}) async {
    try {
      final score = double.tryParse(_scoreController.text.trim());
      final actualTimeMs = DateTime.now()
          .toUtc()
          .difference(_seriesStartedAt)
          .inMilliseconds;
      await widget.activeUseCases.recordCurrentSetResult(
        sessionId: _session.metadata.id,
        programSnapshotId: _plan.programAt(_position).id,
        exerciseSnapshotId: _exercise.id,
        programIndex: _position.programIndex,
        exerciseIndex: _position.exerciseIndex,
        setIndex: _position.setIndex,
        actualReps: skipped ? null : (_exercise.repsEnabled ? _reps : null),
        actualScore: skipped
            ? null
            : (_exercise.manualScoreEnabled ? score : null),
        scoreInputModeSnapshot: _exercise.scoreInputMode,
        scoreLabelSnapshot: _exercise.scoreLabel,
        scoreUnitSnapshot: _exercise.scoreUnit,
        actualTimeMs: skipped
            ? null
            : (_exercise.timeEnabled ? actualTimeMs : null),
      );

      final next = _plan.nextPosition(_position);
      if (next == null) {
        await _complete();
        return;
      }
      final shouldRest = _plan.shouldShowRestAfter(_position);
      if (shouldRest) {
        final rest = await widget.activeUseCases.startRestAfterSet(
          sessionId: _session.metadata.id,
          afterProgramIndex: _position.programIndex,
          afterExerciseIndex: _position.exerciseIndex,
          afterSetIndex: _position.setIndex,
          plannedRestSeconds: _exercise.restSeconds,
        );
        if (!mounted) return;
        _activeRestStateId = rest.metadata.id;
        _remainingRestSeconds = _exercise.restSeconds;
        _startRestTicker(next);
        setState(() => _mode = WorkoutExecutionMode.rest);
        return;
      }
      await _moveTo(next);
    } on Exception catch (error) {
      if (!mounted) return;
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Impossible de terminer la série : $error')),
      );
      return;
    }
  }

  void _startRestTicker(ExecutionPosition next) {
    _restTicker?.cancel();
    _restTicker = Timer.periodic(const Duration(seconds: 1), (timer) {
      if (!mounted) return;
      if (_remainingRestSeconds <= 1) {
        timer.cancel();
        unawaited(_finishRestAndMove(next));
      } else {
        setState(() => _remainingRestSeconds -= 1);
      }
    });
  }

  Future<bool> _restoreActiveRest() async {
    final rest = await widget.activeUseCases.findActiveRest(
      sessionId: _session.metadata.id,
    );
    if (!mounted || rest == null) {
      return false;
    }
    final after = ExecutionPosition(
      programIndex: rest.afterProgramIndex,
      exerciseIndex: rest.afterExerciseIndex,
      setIndex: rest.afterSetIndex,
    );
    final next = _plan.nextPosition(after);
    final remaining = _remainingSecondsFor(rest);
    _activeRestStateId = rest.metadata.id;
    if (next == null || remaining <= 0) {
      await _finishRestAndMove(next);
      return true;
    }
    _remainingRestSeconds = remaining;
    _startRestTicker(next);
    if (!mounted) return true;
    setState(() => _mode = WorkoutExecutionMode.rest);
    return true;
  }

  int _remainingSecondsFor(ActiveRestState rest) {
    final elapsedSeconds = DateTime.now()
        .toUtc()
        .difference(rest.startedAt.toUtc())
        .inSeconds;
    return (rest.adjustedRestSeconds - elapsedSeconds).clamp(0, 9999).toInt();
  }

  Future<void> _adjustRest(int deltaSeconds) async {
    final restStateId = _activeRestStateId;
    setState(() {
      _remainingRestSeconds = (_remainingRestSeconds + deltaSeconds)
          .clamp(0, 9999)
          .toInt();
    });
    if (restStateId == null) return;
    await widget.activeUseCases.adjustRestSeconds(
      restStateId: restStateId,
      deltaSeconds: deltaSeconds,
    );
  }

  Future<void> _skipRest() async {
    _restTicker?.cancel();
    final next = _plan.nextPosition(_position);
    await _finishRestAndMove(next);
  }

  Future<void> _finishRestAndMove(ExecutionPosition? next) async {
    final restStateId = _activeRestStateId;
    _activeRestStateId = null;
    if (restStateId != null) {
      await widget.activeUseCases.skipRest(restStateId: restStateId);
    }
    if (next == null) {
      await _complete();
      return;
    }
    await _moveTo(next);
  }

  Future<void> _moveTo(ExecutionPosition position) async {
    _scoreController.clear();
    _reps = 0;
    _activeRestStateId = null;
    _seriesStartedAt = DateTime.now().toUtc();
    _session = await widget.activeUseCases.updateProgress(
      sessionId: _session.metadata.id,
      programIndex: position.programIndex,
      exerciseIndex: position.exerciseIndex,
      setIndex: position.setIndex,
    );
    if (!mounted) return;
    setState(() => _mode = WorkoutExecutionMode.active);
  }

  Future<void> _complete() async {
    _session = await widget.activeUseCases.complete(_session.metadata.id);
    _completedHistory = await widget.closeUseCase.close(
      sessionId: _session.metadata.id,
      nameSnapshot: _plan.name,
      completed: true,
    );
    if (!mounted) return;
    setState(() => _mode = WorkoutExecutionMode.finished);
  }

  Future<void> _openHistoryDetail() async {
    final history = _completedHistory;
    if (history == null) return;
    await Navigator.of(context).push(
      MaterialPageRoute(
        builder: (context) => HistoryDetailScreen(
          history: history,
          historyUseCases: widget.historyUseCases,
          workoutTemplateUseCases: widget.workoutTemplateUseCases,
          activeUseCases: widget.activeUseCases,
          closeUseCase: widget.closeUseCase,
        ),
      ),
    );
  }

  Future<void> _restartCompleted() async {
    final history = _completedHistory;
    if (history == null) return;
    ActiveWorkoutSession session;
    final sourceId = history.sourceWorkoutTemplateId;
    if (sourceId != null &&
        await widget.workoutTemplateUseCases.findById(sourceId) != null) {
      session = await widget.activeUseCases.startFromTemplate(sourceId);
    } else {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(
            content: Text(
              "La séance originale n'existe plus. Une copie va être utilisée.",
            ),
          ),
        );
      }
      session = await widget.activeUseCases.startFromHistory(history);
    }
    if (!mounted) return;
    await Navigator.of(context).pushReplacement(
      MaterialPageRoute(
        builder: (context) => WorkoutExecutionScreen(
          initialSession: session,
          activeUseCases: widget.activeUseCases,
          closeUseCase: widget.closeUseCase,
          historyUseCases: widget.historyUseCases,
          workoutTemplateUseCases: widget.workoutTemplateUseCases,
        ),
      ),
    );
  }
}

final class SetMeasureInput extends StatelessWidget {
  const SetMeasureInput({
    required this.exercise,
    required this.reps,
    required this.scoreController,
    required this.onRepsChanged,
    super.key,
  });

  final ExecutionExercise exercise;
  final int reps;
  final TextEditingController scoreController;
  final ValueChanged<int> onRepsChanged;

  @override
  Widget build(BuildContext context) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: [
        if (exercise.timeEnabled)
          Card(
            child: Padding(
              padding: const EdgeInsets.all(24),
              child: Column(
                children: [
                  const Text('Temps'),
                  const SizedBox(height: 8),
                  Text(
                    exercise.targetTimeSeconds == null
                        ? 'Chronométrer'
                        : '${exercise.targetTimeSeconds} s',
                    style: AppTextStyles.scoreNumber(context),
                  ),
                ],
              ),
            ),
          ),
        if (exercise.repsEnabled) ...[
          const SizedBox(height: 12),
          Row(
            children: [
              const Expanded(child: Text('Répétitions')),
              IconButton(
                onPressed: () =>
                    onRepsChanged((reps - 1).clamp(0, 999).toInt()),
                icon: const Icon(Icons.remove),
              ),
              Text('$reps', style: AppTextStyles.scoreNumber(context)),
              IconButton(
                onPressed: () => onRepsChanged(reps + 1),
                icon: const Icon(Icons.add),
              ),
            ],
          ),
        ],
        if (exercise.scoreEnabled) ...[
          const SizedBox(height: 12),
          TextField(
            controller: scoreController,
            style: AppTextStyles.scoreNumber(context),
            decoration: InputDecoration(
              labelText: exercise.scoreUnit == null
                  ? 'Score'
                  : 'Score (${exercise.scoreUnit})',
            ),
            keyboardType: TextInputType.number,
          ),
        ],
      ],
    );
  }
}

final class _WorkoutPlanSheet extends StatefulWidget {
  const _WorkoutPlanSheet({
    required this.sessionId,
    required this.plan,
    required this.currentPosition,
    required this.setStates,
    required this.activeUseCases,
    this.activeRest,
  });

  final String sessionId;
  final WorkoutExecutionPlan plan;
  final ExecutionPosition currentPosition;
  final List<SetResultPositionState> setStates;
  final ActiveWorkoutSessionUseCases activeUseCases;
  final ActiveRestState? activeRest;

  @override
  State<_WorkoutPlanSheet> createState() => _WorkoutPlanSheetState();
}

final class _WorkoutPlanSheetState extends State<_WorkoutPlanSheet> {
  Timer? _timer;
  late int _remainingRestSeconds;
  late List<SetResultPositionState> _setStates;

  @override
  void initState() {
    super.initState();
    _setStates = widget.setStates;
    _remainingRestSeconds = _remainingSecondsForRest(widget.activeRest);
    if (widget.activeRest != null && _remainingRestSeconds > 0) {
      _timer = Timer.periodic(const Duration(seconds: 1), (_) {
        if (!mounted) return;
        setState(() {
          _remainingRestSeconds = (_remainingRestSeconds - 1)
              .clamp(0, 9999)
              .toInt();
        });
      });
    }
  }

  @override
  void dispose() {
    _timer?.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final statesByPosition = {
      for (final state in _setStates) _stateKey(state): state,
    };
    return Scaffold(
      appBar: AppBar(
        title: const Text('Plan de séance'),
        leading: IconButton(
          tooltip: 'Fermer',
          onPressed: () => Navigator.of(context).pop(),
          icon: const Icon(Icons.close),
        ),
      ),
      body: ListView(
        padding: const EdgeInsets.all(16),
        children: [
          const Text('Touchez une série pour voir ses valeurs.'),
          if (widget.activeRest != null) ...[
            const SizedBox(height: 12),
            _RestPlanBanner(remainingSeconds: _remainingRestSeconds),
          ],
          const SizedBox(height: 24),
          for (
            var programIndex = 0;
            programIndex < widget.plan.programs.length;
            programIndex++
          ) ...[
            Text(
              widget.plan.programs[programIndex].name,
              style: Theme.of(context).textTheme.titleMedium,
            ),
            const SizedBox(height: 8),
            for (
              var exerciseIndex = 0;
              exerciseIndex <
                  widget.plan.programs[programIndex].exercises.length;
              exerciseIndex++
            ) ...[
              Text(
                widget
                    .plan
                    .programs[programIndex]
                    .exercises[exerciseIndex]
                    .name,
                style: Theme.of(context).textTheme.titleSmall,
              ),
              const SizedBox(height: 4),
              for (
                var setIndex = 0;
                setIndex <
                    widget
                        .plan
                        .programs[programIndex]
                        .exercises[exerciseIndex]
                        .setsCount;
                setIndex++
              )
                _WorkoutPlanSetTile(
                  position: ExecutionPosition(
                    programIndex: programIndex,
                    exerciseIndex: exerciseIndex,
                    setIndex: setIndex,
                  ),
                  currentPosition: widget.currentPosition,
                  exercise: widget
                      .plan
                      .programs[programIndex]
                      .exercises[exerciseIndex],
                  state:
                      statesByPosition[_positionKey(
                        programIndex,
                        exerciseIndex,
                        setIndex,
                      )],
                  onUpdated: _refreshAfterEdit,
                  activeUseCases: widget.activeUseCases,
                  sessionId: widget.sessionId,
                  activeRest: widget.activeRest,
                ),
              const SizedBox(height: 16),
            ],
          ],
        ],
      ),
    );
  }

  Future<void> _refreshAfterEdit() async {
    final updated = await widget.activeUseCases.listSetResults(
      widget.sessionId,
    );
    if (!mounted) return;
    setState(() => _setStates = updated);
    ScaffoldMessenger.of(
      context,
    ).showSnackBar(const SnackBar(content: Text('Série mise à jour')));
  }
}

final class _RestPlanBanner extends StatelessWidget {
  const _RestPlanBanner({required this.remainingSeconds});

  final int remainingSeconds;

  @override
  Widget build(BuildContext context) {
    final label = remainingSeconds <= 0
        ? 'Repos terminé · Reprendre'
        : 'Repos en cours · ${_formatDuration(Duration(seconds: remainingSeconds))}';
    return CourtBlazerAccentPanel(
      padding: const EdgeInsets.all(12),
      child: Text(label),
    );
  }
}

enum _MediaSheetSection { images, video }

final class _ExerciseMediaSheet extends StatefulWidget {
  const _ExerciseMediaSheet({
    required this.exercise,
    this.restRemainingSeconds,
  });

  final ExecutionExercise exercise;
  final int? restRemainingSeconds;

  @override
  State<_ExerciseMediaSheet> createState() => _ExerciseMediaSheetState();
}

final class _ExerciseMediaSheetState extends State<_ExerciseMediaSheet> {
  late final PageController _pageController;
  late _MediaSheetSection _section;
  var _imageIndex = 0;

  @override
  void initState() {
    super.initState();
    _pageController = PageController();
    _section = widget.exercise.imageMediaIds.isNotEmpty
        ? _MediaSheetSection.images
        : _MediaSheetSection.video;
  }

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

  @override
  Widget build(BuildContext context) {
    final exercise = widget.exercise;
    final hasImages = exercise.imageMediaIds.isNotEmpty;
    final hasVideo = exercise.videoMediaId != null;
    return SizedBox(
      height: MediaQuery.of(context).size.height * 0.95,
      child: Scaffold(
        appBar: AppBar(
          title: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              const Text('Médias de l’exercice'),
              Text(exercise.name, style: Theme.of(context).textTheme.bodySmall),
            ],
          ),
          automaticallyImplyLeading: false,
          actions: [
            IconButton(
              tooltip: 'Fermer',
              onPressed: () => Navigator.of(context).pop(),
              icon: const Icon(Icons.close),
            ),
          ],
        ),
        body: ListView(
          padding: const EdgeInsets.all(16),
          children: [
            if (widget.restRemainingSeconds != null) ...[
              _RestPlanBanner(remainingSeconds: widget.restRemainingSeconds!),
              const SizedBox(height: 16),
            ],
            if (hasImages && hasVideo) ...[
              Wrap(
                spacing: 8,
                children: [
                  ChoiceChip(
                    label: const Text('Images'),
                    selected: _section == _MediaSheetSection.images,
                    onSelected: (_) {
                      setState(() => _section = _MediaSheetSection.images);
                    },
                  ),
                  ChoiceChip(
                    label: const Text('Vidéo'),
                    selected: _section == _MediaSheetSection.video,
                    onSelected: (_) {
                      setState(() => _section = _MediaSheetSection.video);
                    },
                  ),
                ],
              ),
              const SizedBox(height: 16),
            ],
            if (_section == _MediaSheetSection.images && hasImages)
              _ImageMediaGallery(
                imageMediaIds: exercise.imageMediaIds,
                pageController: _pageController,
                currentIndex: _imageIndex,
                onPageChanged: (index) => setState(() => _imageIndex = index),
              )
            else if (hasVideo)
              _VideoMediaPanel(videoMediaId: exercise.videoMediaId!),
          ],
        ),
      ),
    );
  }
}

final class _ImageMediaGallery extends StatelessWidget {
  const _ImageMediaGallery({
    required this.imageMediaIds,
    required this.pageController,
    required this.currentIndex,
    required this.onPageChanged,
  });

  final List<String> imageMediaIds;
  final PageController pageController;
  final int currentIndex;
  final ValueChanged<int> onPageChanged;

  @override
  Widget build(BuildContext context) {
    return CourtBlazerAccentPanel(
      padding: const EdgeInsets.all(16),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          Align(
            alignment: Alignment.centerRight,
            child: Text(
              '${currentIndex + 1}/${imageMediaIds.length}',
              style: Theme.of(context).textTheme.labelLarge?.copyWith(
                color: Theme.of(context).colorScheme.primary,
              ),
            ),
          ),
          const SizedBox(height: 12),
          SizedBox(
            height: 320,
            child: PageView.builder(
              controller: pageController,
              itemCount: imageMediaIds.length,
              onPageChanged: onPageChanged,
              itemBuilder: (context, index) {
                return _ImageMediaPage(
                  mediaAssetId: imageMediaIds[index],
                  index: index,
                );
              },
            ),
          ),
        ],
      ),
    );
  }
}

final class _ImageMediaPage extends StatelessWidget {
  const _ImageMediaPage({required this.mediaAssetId, required this.index});

  final String mediaAssetId;
  final int index;

  @override
  Widget build(BuildContext context) {
    final tokens = courtBlazerTokensOf(context);
    return Container(
      margin: const EdgeInsets.symmetric(horizontal: 4),
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(6),
        border: Border.all(color: tokens.border),
        color: Theme.of(context).colorScheme.surface,
      ),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Icon(
            Icons.image_outlined,
            size: 64,
            color: Theme.of(context).colorScheme.primary,
          ),
          const SizedBox(height: 16),
          Text(
            'Image ${index + 1}',
            style: Theme.of(context).textTheme.titleMedium,
          ),
          const SizedBox(height: 4),
          Text(mediaAssetId, style: Theme.of(context).textTheme.bodySmall),
        ],
      ),
    );
  }
}

final class _VideoMediaPanel extends StatelessWidget {
  const _VideoMediaPanel({required this.videoMediaId});

  final String videoMediaId;

  @override
  Widget build(BuildContext context) {
    return CourtBlazerAccentPanel(
      padding: const EdgeInsets.all(16),
      child: SizedBox(
        height: 260,
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Icon(
              Icons.play_circle_outline,
              size: 64,
              color: Theme.of(context).colorScheme.primary,
            ),
            const SizedBox(height: 16),
            Text('Vidéo', style: Theme.of(context).textTheme.titleMedium),
            const SizedBox(height: 4),
            Text(videoMediaId, style: Theme.of(context).textTheme.bodySmall),
          ],
        ),
      ),
    );
  }
}

final class _WorkoutPlanSetTile extends StatelessWidget {
  const _WorkoutPlanSetTile({
    required this.position,
    required this.currentPosition,
    required this.exercise,
    required this.onUpdated,
    required this.activeUseCases,
    required this.sessionId,
    this.activeRest,
    this.state,
  });

  final ExecutionPosition position;
  final ExecutionPosition currentPosition;
  final ExecutionExercise exercise;
  final SetResultPositionState? state;
  final Future<void> Function() onUpdated;
  final ActiveWorkoutSessionUseCases activeUseCases;
  final String sessionId;
  final ActiveRestState? activeRest;

  @override
  Widget build(BuildContext context) {
    final planState = _planSetState(position, currentPosition, state);
    final tappable = planState != _PlanSetStatus.todo;
    final VoidCallback? onTap = tappable
        ? () => unawaited(_handleTap(context, planState))
        : null;
    final tokens = courtBlazerTokensOf(context);
    return Card(
      margin: const EdgeInsets.only(bottom: 8),
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(6),
        side: BorderSide(
          color: planState == _PlanSetStatus.current
              ? Theme.of(context).colorScheme.primary
              : tokens.border,
        ),
      ),
      child: ListTile(
        enabled: tappable,
        title: Text('Série ${position.setIndex + 1}'),
        subtitle: Text(_planSetSubtitle(planState, state?.result)),
        trailing: _PlanStatusBadge(status: planState, onTap: onTap),
        onTap: onTap,
      ),
    );
  }

  Future<void> _handleTap(BuildContext context, _PlanSetStatus status) async {
    if (status == _PlanSetStatus.current) {
      Navigator.of(context).pop();
      return;
    }
    await showModalBottomSheet<void>(
      context: context,
      isScrollControlled: true,
      useSafeArea: true,
      builder: (context) => _EditSetResultSheet(
        sessionId: sessionId,
        position: position,
        exercise: exercise,
        state: state,
        status: status,
        activeUseCases: activeUseCases,
        activeRest: activeRest,
        onSaved: onUpdated,
      ),
    );
  }
}

final class _EditSetResultSheet extends StatefulWidget {
  const _EditSetResultSheet({
    required this.sessionId,
    required this.position,
    required this.exercise,
    required this.state,
    required this.status,
    required this.activeUseCases,
    required this.onSaved,
    this.activeRest,
  });

  final String sessionId;
  final ExecutionPosition position;
  final ExecutionExercise exercise;
  final SetResultPositionState? state;
  final _PlanSetStatus status;
  final ActiveWorkoutSessionUseCases activeUseCases;
  final Future<void> Function() onSaved;
  final ActiveRestState? activeRest;

  @override
  State<_EditSetResultSheet> createState() => _EditSetResultSheetState();
}

final class _EditSetResultSheetState extends State<_EditSetResultSheet> {
  final _timeController = TextEditingController();
  final _repsController = TextEditingController();
  final _scoreController = TextEditingController();
  Timer? _timer;
  late int _remainingRestSeconds;

  @override
  void initState() {
    super.initState();
    final result = widget.state?.result;
    final actualTimeMs = result?.actualTimeMs;
    if (actualTimeMs != null) {
      _timeController.text = (actualTimeMs / 1000).round().toString();
    }
    final actualReps = result?.actualReps;
    if (actualReps != null) {
      _repsController.text = actualReps.toString();
    }
    final actualScore = result?.actualScore;
    if (actualScore != null) {
      _scoreController.text = _formatScore(actualScore);
    }
    _remainingRestSeconds = _remainingSecondsForRest(widget.activeRest);
    if (widget.activeRest != null && _remainingRestSeconds > 0) {
      _timer = Timer.periodic(const Duration(seconds: 1), (_) {
        if (!mounted) return;
        setState(() {
          _remainingRestSeconds = (_remainingRestSeconds - 1)
              .clamp(0, 9999)
              .toInt();
        });
      });
    }
  }

  @override
  void dispose() {
    _timer?.cancel();
    _timeController.dispose();
    _repsController.dispose();
    _scoreController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final isCompleted = widget.status == _PlanSetStatus.completed;
    return Padding(
      padding: EdgeInsets.only(
        left: 16,
        right: 16,
        top: 16,
        bottom: MediaQuery.of(context).viewInsets.bottom + 16,
      ),
      child: ListView(
        shrinkWrap: true,
        children: [
          Row(
            children: [
              Expanded(
                child: Text(
                  'Modifier la série',
                  style: Theme.of(context).textTheme.titleLarge,
                ),
              ),
              IconButton(
                tooltip: 'Annuler',
                onPressed: () => Navigator.of(context).pop(),
                icon: const Icon(Icons.close),
              ),
            ],
          ),
          const SizedBox(height: 8),
          Text(
            '${widget.exercise.name} · '
            'Série ${widget.position.setIndex + 1}/${widget.exercise.setsCount}',
          ),
          const SizedBox(height: 8),
          Text(
            'État actuel : ${isCompleted ? 'Terminée' : 'Passée'}',
            style: Theme.of(context).textTheme.bodySmall,
          ),
          if (widget.activeRest != null) ...[
            const SizedBox(height: 12),
            _RestPlanBanner(remainingSeconds: _remainingRestSeconds),
          ],
          const SizedBox(height: 24),
          if (widget.exercise.timeEnabled) ...[
            TextField(
              controller: _timeController,
              decoration: const InputDecoration(labelText: 'Temps réalisé (s)'),
              keyboardType: TextInputType.number,
            ),
            const SizedBox(height: 12),
          ],
          if (widget.exercise.repsEnabled) ...[
            TextField(
              controller: _repsController,
              decoration: const InputDecoration(labelText: 'Répétitions'),
              keyboardType: TextInputType.number,
            ),
            const SizedBox(height: 12),
          ],
          if (widget.exercise.scoreEnabled) ...[
            TextField(
              controller: _scoreController,
              decoration: InputDecoration(
                labelText: widget.exercise.scoreUnit == null
                    ? 'Score'
                    : 'Score (${widget.exercise.scoreUnit})',
              ),
              keyboardType: TextInputType.number,
            ),
            const SizedBox(height: 12),
          ],
          const SizedBox(height: 12),
          FilledButton(
            onPressed: _saveCompleted,
            child: Text(
              isCompleted
                  ? 'Enregistrer les corrections'
                  : 'Enregistrer le résultat',
            ),
          ),
          const SizedBox(height: 8),
          OutlinedButton(
            onPressed: _markSkipped,
            child: const Text('Marquer comme passée'),
          ),
          TextButton(
            onPressed: () => Navigator.of(context).pop(),
            child: const Text('Annuler'),
          ),
        ],
      ),
    );
  }

  Future<void> _saveCompleted() async {
    if (!_hasAnyValue()) {
      if (widget.status == _PlanSetStatus.completed) {
        final confirmed = await _confirmMarkSkipped();
        if (confirmed != true) return;
      }
      await _saveSkipped();
      return;
    }
    await widget.activeUseCases.upsertSetResultAtPosition(
      sessionId: widget.sessionId,
      programIndex: widget.position.programIndex,
      exerciseIndex: widget.position.exerciseIndex,
      setIndex: widget.position.setIndex,
      status: SetResultStatus.completed,
      actualTimeMs: widget.exercise.timeEnabled
          ? _secondsToMilliseconds(_timeController.text)
          : null,
      actualReps: widget.exercise.repsEnabled
          ? int.tryParse(_repsController.text.trim())
          : null,
      actualScore: widget.exercise.scoreEnabled
          ? double.tryParse(_scoreController.text.trim())
          : null,
      scoreUnitSnapshot: widget.exercise.scoreUnit,
    );
    await _finishSave();
  }

  Future<void> _markSkipped() async {
    await _saveSkipped();
  }

  Future<void> _saveSkipped() async {
    await widget.activeUseCases.upsertSetResultAtPosition(
      sessionId: widget.sessionId,
      programIndex: widget.position.programIndex,
      exerciseIndex: widget.position.exerciseIndex,
      setIndex: widget.position.setIndex,
      status: SetResultStatus.skipped,
    );
    await _finishSave();
  }

  Future<void> _finishSave() async {
    await widget.onSaved();
    if (!mounted) return;
    Navigator.of(context).pop();
  }

  bool _hasAnyValue() {
    return _timeController.text.trim().isNotEmpty ||
        _repsController.text.trim().isNotEmpty ||
        _scoreController.text.trim().isNotEmpty;
  }

  Future<bool?> _confirmMarkSkipped() {
    return showDialog<bool>(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('Supprimer le résultat de cette série ?'),
        content: const Text(
          'La série restera dans le plan comme passée, sans résultat saisi.',
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(context).pop(false),
            child: const Text('Annuler'),
          ),
          FilledButton(
            onPressed: () => Navigator.of(context).pop(true),
            child: const Text('Marquer comme passée'),
          ),
        ],
      ),
    );
  }
}

final class _PlanStatusBadge extends StatelessWidget {
  const _PlanStatusBadge({required this.status, this.onTap});

  final _PlanSetStatus status;
  final VoidCallback? onTap;

  @override
  Widget build(BuildContext context) {
    final tokens = courtBlazerTokensOf(context);
    final label = switch (status) {
      _PlanSetStatus.todo => 'À faire',
      _PlanSetStatus.current => 'En cours',
      _PlanSetStatus.completed => 'Terminée',
      _PlanSetStatus.passed => 'Passée',
    };
    final color = switch (status) {
      _PlanSetStatus.completed => tokens.success,
      _PlanSetStatus.current => Theme.of(context).colorScheme.primary,
      _ => tokens.border,
    };
    return InkWell(
      onTap: onTap,
      borderRadius: BorderRadius.circular(16),
      child: Chip(
        label: Text(label),
        backgroundColor: color.withAlpha(35),
        side: BorderSide(color: color),
      ),
    );
  }
}

enum _PlanSetStatus { todo, current, completed, passed }

_PlanSetStatus _planSetState(
  ExecutionPosition position,
  ExecutionPosition currentPosition,
  SetResultPositionState? state,
) {
  if (_comparePosition(position, currentPosition) == 0) {
    return _PlanSetStatus.current;
  }
  if (state?.status == SetPositionStatus.completed) {
    return _PlanSetStatus.completed;
  }
  if (state?.status == SetPositionStatus.skipped ||
      _comparePosition(position, currentPosition) < 0) {
    return _PlanSetStatus.passed;
  }
  return _PlanSetStatus.todo;
}

String _planSetSubtitle(_PlanSetStatus status, ActiveSetResult? result) {
  if (status == _PlanSetStatus.completed && result != null) {
    return _setResultSummary(result);
  }
  if (status == _PlanSetStatus.passed) {
    return 'Aucun résultat';
  }
  return '';
}

String _setResultSummary(ActiveSetResult result) {
  final parts = <String>[];
  if (result.actualTimeMs != null) {
    parts.add(_formatDuration(Duration(milliseconds: result.actualTimeMs!)));
  }
  if (result.actualReps != null) {
    parts.add('${result.actualReps} reps');
  }
  if (result.actualScore != null) {
    final value = _formatScore(result.actualScore!);
    final unit = result.scoreUnitSnapshot?.trim();
    parts.add(unit == null || unit.isEmpty ? 'Score $value' : '$value $unit');
  }
  return parts.isEmpty ? 'Aucun résultat' : parts.join(' · ');
}

String _formatScore(double value) {
  return value == value.roundToDouble()
      ? value.round().toString()
      : value.toString();
}

int? _secondsToMilliseconds(String rawValue) {
  final seconds = int.tryParse(rawValue.trim());
  return seconds == null ? null : seconds * 1000;
}

int _remainingSecondsForRest(ActiveRestState? rest) {
  if (rest == null) return 0;
  final elapsedSeconds = DateTime.now()
      .toUtc()
      .difference(rest.startedAt.toUtc())
      .inSeconds;
  return (rest.adjustedRestSeconds - elapsedSeconds).clamp(0, 9999).toInt();
}

String _stateKey(SetResultPositionState state) {
  return _positionKey(state.programIndex, state.exerciseIndex, state.setIndex);
}

String _positionKey(int programIndex, int exerciseIndex, int setIndex) {
  return '$programIndex:$exerciseIndex:$setIndex';
}

int _comparePosition(ExecutionPosition left, ExecutionPosition right) {
  final program = left.programIndex.compareTo(right.programIndex);
  if (program != 0) return program;
  final exercise = left.exerciseIndex.compareTo(right.exerciseIndex);
  if (exercise != 0) return exercise;
  return left.setIndex.compareTo(right.setIndex);
}

final class WorkoutExecutionPlan {
  const WorkoutExecutionPlan({required this.name, required this.programs});

  factory WorkoutExecutionPlan.fromSession(ActiveWorkoutSession session) {
    final snapshot =
        jsonDecode(session.resolvedTemplateSnapshotJson)
            as Map<String, dynamic>;
    final overrides = snapshot['overrides'] as List<dynamic>? ?? const [];
    final programs = (snapshot['programs'] as List<dynamic>? ?? const []).map((
      rawProgram,
    ) {
      final program = rawProgram as Map<String, dynamic>;
      final programSnapshot =
          jsonDecode(program['programSnapshotJson'] as String)
              as Map<String, dynamic>;
      return ExecutionProgram.fromSnapshot(
        id: program['id'] as String,
        name: program['programNameSnapshot'] as String,
        snapshot: programSnapshot,
        overrides: overrides,
      );
    }).toList();
    return WorkoutExecutionPlan(
      name: snapshot['name'] as String? ?? 'Séance',
      programs: programs,
    );
  }

  final String name;
  final List<ExecutionProgram> programs;

  ExecutionProgram programAt(ExecutionPosition position) {
    return programs[position.programIndex];
  }

  ExecutionExercise exerciseAt(ExecutionPosition position) {
    return programAt(position).exercises[position.exerciseIndex];
  }

  ExecutionPosition? nextPosition(ExecutionPosition position) {
    final exercise = exerciseAt(position);
    if (position.setIndex + 1 < exercise.setsCount) {
      return position.copyWith(setIndex: position.setIndex + 1);
    }
    final program = programAt(position);
    if (position.exerciseIndex + 1 < program.exercises.length) {
      return ExecutionPosition(
        programIndex: position.programIndex,
        exerciseIndex: position.exerciseIndex + 1,
        setIndex: 0,
      );
    }
    if (position.programIndex + 1 < programs.length) {
      return ExecutionPosition(
        programIndex: position.programIndex + 1,
        exerciseIndex: 0,
        setIndex: 0,
      );
    }
    return null;
  }

  bool shouldShowRestAfter(ExecutionPosition position) {
    return nextPosition(position) != null &&
        exerciseAt(position).restSeconds > 0;
  }

  String progressLabel(ExecutionPosition position) {
    final program = programAt(position);
    return 'Programme ${position.programIndex + 1}/${programs.length} · '
        'Exercice ${position.exerciseIndex + 1}/${program.exercises.length}';
  }
}

final class ExecutionProgram {
  const ExecutionProgram({
    required this.id,
    required this.name,
    required this.exercises,
  });

  factory ExecutionProgram.fromSnapshot({
    required String id,
    required String name,
    required Map<String, dynamic> snapshot,
    required List<dynamic> overrides,
  }) {
    final exercises = (snapshot['exercises'] as List<dynamic>? ?? const []).map(
      (raw) {
        final exercise = raw as Map<String, dynamic>;
        Map<String, dynamic>? override;
        for (final rawOverride in overrides) {
          final item = rawOverride as Map<String, dynamic>;
          if (item['workoutTemplateProgramId'] == id &&
              item['snapshotProgramExerciseId'] == exercise['id']) {
            override = item;
            break;
          }
        }
        return ExecutionExercise.fromSnapshot(exercise, override);
      },
    ).toList();
    return ExecutionProgram(id: id, name: name, exercises: exercises);
  }

  final String id;
  final String name;
  final List<ExecutionExercise> exercises;
}

final class ExecutionExercise {
  const ExecutionExercise({
    required this.id,
    required this.name,
    required this.setsCount,
    required this.timeEnabled,
    required this.repsEnabled,
    required this.scoreEnabled,
    required this.restSeconds,
    this.imageMediaIds = const [],
    this.videoMediaId,
    this.scoreInputMode = ScoreInputMode.manual,
    this.scoreLabel,
    this.targetTimeSeconds,
    this.targetReps,
    this.targetScore,
    this.scoreUnit,
  });

  factory ExecutionExercise.fromSnapshot(
    Map<String, dynamic> exercise,
    Map<String, dynamic>? override,
  ) {
    return ExecutionExercise(
      id: exercise['id'] as String,
      name: exercise['exerciseNameSnapshot'] as String,
      setsCount:
          (override?['setsCountOverride'] as int?) ??
          (exercise['setsCount'] as int),
      timeEnabled: exercise['timeEnabled'] as bool,
      repsEnabled: exercise['repsEnabled'] as bool,
      scoreEnabled: exercise['scoreEnabled'] as bool,
      restSeconds: exercise['restSecondsOverride'] as int? ?? 0,
      imageMediaIds: _imageMediaIdsFromSnapshot(exercise),
      videoMediaId:
          exercise['videoMediaIdSnapshot'] as String? ??
          exercise['exerciseVideoMediaIdSnapshot'] as String?,
      scoreInputMode: _scoreInputModeFromSnapshot(
        exercise['scoreInputModeSnapshot'],
      ),
      scoreLabel: exercise['scoreLabelSnapshot'] as String?,
      targetTimeSeconds:
          (override?['targetTimeSecondsOverride'] as int?) ??
          (exercise['targetTimeSeconds'] as int?),
      targetReps:
          (override?['targetRepsOverride'] as int?) ??
          (exercise['targetReps'] as int?),
      targetScore:
          (override?['targetScoreOverride'] as num?)?.toDouble() ??
          (exercise['targetScore'] as num?)?.toDouble(),
      scoreUnit: exercise['scoreUnitSnapshot'] as String?,
    );
  }

  final String id;
  final String name;
  final int setsCount;
  final bool timeEnabled;
  final bool repsEnabled;
  final bool scoreEnabled;
  final int restSeconds;
  final List<String> imageMediaIds;
  final String? videoMediaId;
  final ScoreInputMode scoreInputMode;
  final String? scoreLabel;
  final int? targetTimeSeconds;
  final int? targetReps;
  final double? targetScore;
  final String? scoreUnit;

  bool get manualScoreEnabled {
    return scoreEnabled && scoreInputMode == ScoreInputMode.manual;
  }

  bool get hasMedia {
    return imageMediaIds.isNotEmpty || videoMediaId != null;
  }
}

List<String> _imageMediaIdsFromSnapshot(Map<String, dynamic> exercise) {
  final imageMediaIds =
      exercise['imageMediaIdsSnapshot'] ??
      exercise['exerciseImageMediaIdsSnapshot'];
  if (imageMediaIds is List) {
    return imageMediaIds
        .whereType<String>()
        .where((id) => id.trim().isNotEmpty)
        .toList(growable: false);
  }
  final imageMediaId = exercise['exerciseImageMediaIdSnapshot'] as String?;
  return [
    if (imageMediaId != null && imageMediaId.trim().isNotEmpty) imageMediaId,
  ];
}

ScoreInputMode _scoreInputModeFromSnapshot(Object? value) {
  return switch (value) {
    'stopwatch' => ScoreInputMode.stopwatch,
    _ => ScoreInputMode.manual,
  };
}

final class ExecutionPosition {
  const ExecutionPosition({
    required this.programIndex,
    required this.exerciseIndex,
    required this.setIndex,
  });

  final int programIndex;
  final int exerciseIndex;
  final int setIndex;

  ExecutionPosition copyWith({int? setIndex}) {
    return ExecutionPosition(
      programIndex: programIndex,
      exerciseIndex: exerciseIndex,
      setIndex: setIndex ?? this.setIndex,
    );
  }
}

final class _Header extends StatelessWidget {
  const _Header({required this.elapsedLabel, required this.progressLabel});

  final String elapsedLabel;
  final String progressLabel;

  @override
  Widget build(BuildContext context) {
    return CourtBlazerAccentPanel(
      padding: const EdgeInsets.all(14),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(elapsedLabel, style: AppTextStyles.scoreNumber(context)),
          const SizedBox(height: 4),
          Text(progressLabel),
        ],
      ),
    );
  }
}

final class _SeriesCounterCard extends StatelessWidget {
  const _SeriesCounterCard({required this.currentSet, required this.totalSets});

  final int currentSet;
  final int totalSets;

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final tokens = courtBlazerTokensOf(context);
    return CourtBlazerAccentPanel(
      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            'SÉRIE',
            style: theme.textTheme.labelSmall?.copyWith(
              color: tokens.mutedText,
              fontWeight: FontWeight.w600,
            ),
          ),
          const SizedBox(height: 6),
          Text(
            '$currentSet / $totalSets',
            style: theme.textTheme.displayLarge?.copyWith(
              color: theme.colorScheme.primary,
              fontSize: 48,
            ),
          ),
        ],
      ),
    );
  }
}

String _formatDuration(Duration duration) {
  final minutes = duration.inMinutes.remainder(60).toString().padLeft(2, '0');
  final seconds = duration.inSeconds.remainder(60).toString().padLeft(2, '0');
  final hours = duration.inHours;
  if (hours > 0) {
    return '$hours:$minutes:$seconds';
  }
  return '$minutes:$seconds';
}