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

import '../../services/auth_service.dart';
import '../../utils/email_utils.dart';
import '../custom_app_text_field.dart';

/// Modale login : numéro de dossier + e-mail → token reprise (#112).
class RepriseIdentifyDialog extends StatefulWidget {
  final String? initialEmail;

  const RepriseIdentifyDialog({super.key, this.initialEmail});

  @override
  State<RepriseIdentifyDialog> createState() => _RepriseIdentifyDialogState();
}

class _RepriseIdentifyDialogState extends State<RepriseIdentifyDialog> {
  final _formKey = GlobalKey<FormState>();
  late final TextEditingController _numeroCtrl;
  late final TextEditingController _emailCtrl;

  bool _loading = false;
  String? _error;

  @override
  void initState() {
    super.initState();
    _numeroCtrl = TextEditingController();
    _emailCtrl = TextEditingController(text: widget.initialEmail ?? '');
  }

  @override
  void dispose() {
    _numeroCtrl.dispose();
    _emailCtrl.dispose();
    super.dispose();
  }

  String? _validateNumero(String? value) {
    final v = value?.trim() ?? '';
    if (v.isEmpty) {
      return 'Indiquez votre numéro de dossier.';
    }
    return null;
  }

  String? _validateEmail(String? value) {
    final v = value?.trim() ?? '';
    if (v.isEmpty) {
      return 'Indiquez votre adresse e-mail.';
    }
    if (!isValidEmailFormat(v)) {
      return 'L’adresse e-mail n’est pas valide.';
    }
    return null;
  }

  Future<void> _submit() async {
    if (_loading) return;
    setState(() => _error = null);
    if (!(_formKey.currentState?.validate() ?? false)) return;

    setState(() => _loading = true);
    try {
      final token = await AuthService.identifyReprise(
        numeroDossier: _numeroCtrl.text,
        email: _emailCtrl.text,
      );
      if (!mounted) return;
      Navigator.of(context).pop(token);
    } catch (e) {
      if (!mounted) return;
      setState(() {
        _loading = false;
        _error = e is Exception
            ? e.toString().replaceFirst('Exception: ', '')
            : 'Impossible de retrouver votre dossier.';
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      title: Text(
        'Reprendre mon dossier',
        style: GoogleFonts.merienda(fontWeight: FontWeight.bold),
      ),
      content: SizedBox(
        width: 420,
        child: Form(
          key: _formKey,
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Text(
                'Saisissez le numéro de dossier et l’e-mail utilisés lors '
                'de l’inscription (dossier refusé en attente de correction).',
                style: GoogleFonts.merienda(fontSize: 13),
              ),
              const SizedBox(height: 16),
              CustomAppTextField(
                controller: _numeroCtrl,
                labelText: 'Numéro de dossier',
                hintText: 'Ex. 2026-000021',
                textInputAction: TextInputAction.next,
                validator: _validateNumero,
                style: CustomAppTextFieldStyle.lavande,
                fieldHeight: 48,
                fieldWidth: double.infinity,
              ),
              const SizedBox(height: 12),
              CustomAppTextField(
                controller: _emailCtrl,
                labelText: 'E-mail',
                hintText: 'Votre adresse e-mail',
                keyboardType: TextInputType.emailAddress,
                autocorrect: false,
                enableSuggestions: false,
                inputFormatters: const [EmailMaxLengthFormatter()],
                textInputAction: TextInputAction.done,
                onFieldSubmitted: (_) => _submit(),
                validator: _validateEmail,
                style: CustomAppTextFieldStyle.lavande,
                fieldHeight: 48,
                fieldWidth: double.infinity,
              ),
              if (_error != null) ...[
                const SizedBox(height: 12),
                Text(
                  _error!,
                  style: GoogleFonts.merienda(
                    fontSize: 12,
                    color: Colors.red.shade700,
                  ),
                ),
              ],
            ],
          ),
        ),
      ),
      actions: [
        TextButton(
          onPressed: _loading ? null : () => Navigator.of(context).pop(),
          child: Text('Annuler', style: GoogleFonts.merienda()),
        ),
        TextButton(
          onPressed: _loading ? null : _submit,
          child: _loading
              ? const SizedBox(
                  width: 18,
                  height: 18,
                  child: CircularProgressIndicator(strokeWidth: 2),
                )
              : Text(
                  'Continuer',
                  style: GoogleFonts.merienda(
                    fontWeight: FontWeight.bold,
                    color: const Color(0xFF2D6A4F),
                  ),
                ),
        ),
      ],
    );
  }
}