import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:p_tits_pas/models/assistante_maternelle_model.dart';
import 'package:p_tits_pas/services/user_service.dart';
import 'package:p_tits_pas/utils/am_vigilance.dart';
import 'package:p_tits_pas/widgets/admin/common/admin_am_edit_modal.dart';
import 'package:p_tits_pas/widgets/admin/common/admin_select_list_modal.dart';
import 'package:p_tits_pas/widgets/admin/common/admin_user_card.dart';
import 'package:p_tits_pas/widgets/admin/validation_modal_theme.dart';

List<String> _amSelectSubtitleLines(AssistanteMaternelleModel am) {
  final lines = <String>[];
  final zone = (am.residenceCity ?? '').trim();
  if (zone.isNotEmpty) lines.add('Zone : $zone');
  final agrement = (am.approvalNumber ?? '').trim();
  if (agrement.isNotEmpty) lines.add('Agrément : $agrement');
  final max = am.maxChildren;
  final free = amExpectedPlacesAvailable(
        maxChildren: max,
        childrenCount: am.children.length,
      ) ??
      am.placesAvailable;
  if (free != null || max != null) {
    lines.add('Places libres : ${free ?? '–'} / capa. ${max ?? '–'}');
  }
  lines.add('${am.children.length} enfant(s)');
  return lines;
}

/// Sélection d'une AM à rattacher (fiche enfant) — ticket #147.
/// S'appuie sur [AdminSelectListModal] (shell partagé avec #146).
class AdminSelectAmModal {
  AdminSelectAmModal._();

  static Future<AssistanteMaternelleModel?> show(
    BuildContext context, {
    Set<String> excludeIds = const {},
    String title = 'Choisir une assistante maternelle',
  }) {
    return AdminSelectListModal.show<AssistanteMaternelleModel>(
      context,
      title: title,
      searchHint: 'Rechercher par nom, prénom ou zone…',
      emptyMessage: 'Aucune assistante maternelle disponible',
      noResultsMessage: 'Aucune AM avec place libre pour cette recherche',
      toggleFilter: const AdminSelectToggleFilter<AssistanteMaternelleModel>(
        label: 'Libre',
        initialValue: true,
        whenEnabled: amHasFreePlace,
      ),
      loadItems: () async {
        final list = await UserService.getAssistantesMaternelles();
        return list
            .where((am) => !excludeIds.contains(am.user.id))
            .toList()
          ..sort(
            (a, b) => a.user.fullName
                .toLowerCase()
                .compareTo(b.user.fullName.toLowerCase()),
          );
      },
      matchesQuery: (am, q) {
        final u = am.user;
        final name = u.fullName.toLowerCase();
        final fn = (u.prenom ?? '').toLowerCase();
        final ln = (u.nom ?? '').toLowerCase();
        final zone = (am.residenceCity ?? '').toLowerCase();
        final agrement = (am.approvalNumber ?? '').toLowerCase();
        return name.contains(q) ||
            fn.contains(q) ||
            ln.contains(q) ||
            zone.contains(q) ||
            agrement.contains(q);
      },
      resolveSelect: (ctx, am, reload) =>
          _resolveAmSelection(ctx, am, reload),
      itemBuilder: (context, am, onSelect) {
        final full = !amHasFreePlace(am);
        return AdminUserCard(
          title: am.user.fullName,
          avatarUrl: am.user.photoUrl,
          fallbackIcon: Icons.face,
          subtitleLines: _amSelectSubtitleLines(am),
          vigilanceTooltip: amPlacesVigilanceMessage(am),
          onCardTap: onSelect,
          margin: const EdgeInsets.only(bottom: 4),
          contentPadding: const EdgeInsets.symmetric(
            horizontal: 10,
            vertical: 5,
          ),
          backgroundColor: full ? const Color(0xFFFFEBEE) : null,
          borderColor: full ? Colors.red.shade200 : null,
          actions: [
            IconButton(
              icon: const Icon(Icons.add_link),
              tooltip: 'Rattacher',
              onPressed: onSelect,
            ),
          ],
        );
      },
    );
  }

  static Future<AssistanteMaternelleModel?> _resolveAmSelection(
    BuildContext context,
    AssistanteMaternelleModel am,
    Future<void> Function() reloadList,
  ) async {
    if (amHasFreePlace(am)) return am;

    final selected = await showDialog<AssistanteMaternelleModel>(
      context: context,
      builder: (ctx) => _AmNoPlaceWarningDialog(initialAm: am),
    );
    await reloadList();
    return selected;
  }
}

/// Avertissement AM saturée + lien vers la fiche pour ajuster les places.
class _AmNoPlaceWarningDialog extends StatefulWidget {
  final AssistanteMaternelleModel initialAm;

  const _AmNoPlaceWarningDialog({required this.initialAm});

  @override
  State<_AmNoPlaceWarningDialog> createState() =>
      _AmNoPlaceWarningDialogState();
}

class _AmNoPlaceWarningDialogState extends State<_AmNoPlaceWarningDialog> {
  late AssistanteMaternelleModel _am;
  TapGestureRecognizer? _linkRecognizer;

  @override
  void initState() {
    super.initState();
    _am = widget.initialAm;
    _linkRecognizer = TapGestureRecognizer()..onTap = _openAmFiche;
  }

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

  Future<void> _openAmFiche() async {
    if (!mounted) return;
    await showDialog<void>(
      context: context,
      builder: (ctx) => AdminAmEditModal(
        assistante: _am,
        onSaved: () async {
          try {
            final fresh =
                await UserService.getAssistanteMaternelle(_am.user.id);
            if (mounted) setState(() => _am = fresh);
          } catch (_) {}
        },
      ),
    );
    if (!mounted) return;

    try {
      final fresh = await UserService.getAssistanteMaternelle(_am.user.id);
      if (!mounted) return;
      setState(() => _am = fresh);
      if (amHasFreePlace(fresh)) {
        Navigator.of(context).pop(fresh);
      }
    } catch (_) {}
  }

  @override
  Widget build(BuildContext context) {
    final name = _am.user.fullName.trim().isNotEmpty
        ? _am.user.fullName.trim()
        : 'Cette assistante maternelle';
    const linkColor = ValidationModalTheme.primaryActionBackground;

    return AlertDialog(
      title: const Text('Plus de place disponible'),
      content: Text.rich(
        TextSpan(
          style: const TextStyle(fontSize: 14, color: Colors.black87, height: 1.4),
          children: [
            TextSpan(
              text: '$name n\'a plus de place libre pour accueillir '
                  'un enfant supplémentaire.\n\n',
            ),
            const TextSpan(text: 'Vous pouvez '),
            TextSpan(
              text: 'ouvrir sa fiche',
              style: TextStyle(
                color: linkColor,
                decoration: TextDecoration.underline,
                fontWeight: FontWeight.w600,
              ),
              recognizer: _linkRecognizer,
            ),
            const TextSpan(
              text: ' pour modifier la capacité ou les places, '
                  'puis la sélectionner si une place se libère.',
            ),
          ],
        ),
      ),
      actions: [
        TextButton(
          onPressed: () => Navigator.of(context).pop(),
          child: const Text('Fermer'),
        ),
      ],
    );
  }
}