import 'package:flutter/material.dart';
import 'package:p_tits_pas/models/dossier_unifie.dart';
import 'package:p_tits_pas/services/user_service.dart';
import 'package:p_tits_pas/widgets/admin/validation_am_wizard.dart';
import 'package:p_tits_pas/widgets/admin/validation_family_wizard.dart';

/// Modale (dialog) : charge le dossier par numéro puis affiche le wizard AM ou Famille. Ticket #107, #119.
class ValidationDossierModal extends StatefulWidget {
  final String numeroDossier;
  final VoidCallback onClose;
  final VoidCallback? onSuccess;

  const ValidationDossierModal({
    super.key,
    required this.numeroDossier,
    required this.onClose,
    this.onSuccess,
  });

  @override
  State<ValidationDossierModal> createState() => _ValidationDossierModalState();
}

class _ValidationDossierModalState extends State<ValidationDossierModal> {
  bool _loading = true;
  String? _error;
  DossierUnifie? _dossier;
  int? _stepIndex;
  int? _stepTotal;

  void _onStepChanged(int step, int total) {
    // step = 0-based dans les wizards, affichage 1-based dans l'en-tête.
    if (!mounted) return;
    setState(() {
      _stepIndex = step;
      _stepTotal = total;
    });
  }

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

  Future<void> _load() async {
    setState(() {
      _loading = true;
      _error = null;
      _dossier = null;
      _stepIndex = null;
      _stepTotal = null;
    });
    try {
      final d = await UserService.getDossier(widget.numeroDossier);
      if (!mounted) return;
      setState(() {
        _dossier = d;
        _loading = false;
      });
    } catch (e) {
      if (!mounted) return;
      setState(() {
        _error = e is Exception
            ? e.toString().replaceFirst('Exception: ', '')
            : 'Erreur inconnue';
        _loading = false;
      });
    }
  }

  void _onSuccess() {
    widget.onSuccess?.call();
    // La modale est fermée par l’appelant dans onSuccess (Navigator.pop).
  }

  /// Largeur modale = 1,5 × 620.
  static const double _modalWidth = 930; // 620 * 1.5
  // Hauteur uniforme (ajustée +5px pour éviter l'overflow des étapes parents sans scroll).
  static const double _bodyHeight = 435;

  @override
  Widget build(BuildContext context) {
    final maxH = MediaQuery.of(context).size.height * 0.85;
    final showStep =
        _stepIndex != null && _stepTotal != null && (_stepTotal ?? 0) > 0;
    return Dialog(
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
      child: ConstrainedBox(
        constraints: BoxConstraints(maxWidth: _modalWidth, maxHeight: maxH),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            Row(
              children: [
                Padding(
                  padding: const EdgeInsets.fromLTRB(18, 18, 0, 12),
                  child: Text(
                    'Dossier ${widget.numeroDossier}',
                    style: const TextStyle(
                        fontSize: 18, fontWeight: FontWeight.w700),
                  ),
                ),
                const Spacer(),
                if (showStep) ...[
                  Text(
                    'Étape ${(_stepIndex ?? 0) + 1}/${_stepTotal ?? 1}',
                    style: Theme.of(context).textTheme.titleSmall?.copyWith(
                          color: Colors.black54,
                          fontStyle: FontStyle.italic,
                        ),
                  ),
                  const SizedBox(width: 8),
                ],
                IconButton(
                  icon: const Icon(Icons.close),
                  onPressed: widget.onClose,
                  tooltip: 'Fermer',
                ),
              ],
            ),
            const Divider(height: 1),
            SizedBox(
              height: _bodyHeight,
              child: _buildBody(),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildBody() {
    if (_loading) {
      return const Padding(
        padding: EdgeInsets.all(48),
        child: Center(child: CircularProgressIndicator()),
      );
    }
    if (_error != null && _error!.isNotEmpty) {
      return Padding(
        padding: const EdgeInsets.all(24),
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            Text(_error!,
                style: const TextStyle(color: Colors.red),
                textAlign: TextAlign.center),
            const SizedBox(height: 16),
            ElevatedButton(onPressed: _load, child: const Text('Réessayer')),
            const SizedBox(height: 8),
            TextButton(onPressed: widget.onClose, child: const Text('Fermer')),
          ],
        ),
      );
    }
    final d = _dossier!;
    if (d.isAm) {
      return ValidationAmWizard(
        dossier: d.asAm,
        onClose: widget.onClose,
        onSuccess: _onSuccess,
        onStepChanged: _onStepChanged,
      );
    }
    return ValidationFamilyWizard(
      dossier: d.asFamily,
      onClose: widget.onClose,
      onSuccess: _onSuccess,
      onStepChanged: _onStepChanged,
    );
  }
}