EME_APP/eme-frontend/lib/widgets/app_message.dart

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

import "../theme/ensup_colors.dart";

enum AppMessageType { information, succes, alerte, erreur }

class AppMessage {
  AppMessage._();

  static int _messageActif = 0;

  static void information(
    BuildContext context,
    String message, {
    String titre = "Information",
  }) {
    _afficher(
      context,
      type: AppMessageType.information,
      titre: titre,
      message: message,
    );
  }

  static void succes(
    BuildContext context,
    String message, {
    String titre = "Action réussie",
  }) {
    _afficher(
      context,
      type: AppMessageType.succes,
      titre: titre,
      message: message,
    );
  }

  static void alerte(
    BuildContext context,
    String message, {
    String titre = "Attention",
  }) {
    _afficher(
      context,
      type: AppMessageType.alerte,
      titre: titre,
      message: message,
    );
  }

  static void erreur(
    BuildContext context,
    Object erreur, {
    String titre = "Une erreur est survenue",
  }) {
    _afficher(
      context,
      type: AppMessageType.erreur,
      titre: titre,
      message: _nettoyerErreur(erreur),
      duree: const Duration(seconds: 8),
    );
  }

  static void _afficher(
    BuildContext context, {
    required AppMessageType type,
    required String titre,
    required String message,
    Duration duree = const Duration(seconds: 6),
  }) {
    final messenger = ScaffoldMessenger.of(context);
    final identifiant = ++_messageActif;
    final style = _style(type);

    messenger
      ..clearSnackBars()
      ..hideCurrentMaterialBanner()
      ..showMaterialBanner(
        MaterialBanner(
          backgroundColor: style.fond,
          surfaceTintColor: Colors.transparent,
          elevation: 6,
          shadowColor: EnsupColors.text.withValues(alpha: 0.18),
          padding: const EdgeInsets.fromLTRB(20, 14, 8, 14),
          leadingPadding: const EdgeInsets.only(right: 14),
          leading: Container(
            width: 40,
            height: 40,
            decoration: BoxDecoration(
              color: style.couleur,
              borderRadius: BorderRadius.circular(8),
            ),
            child: Icon(style.icone, color: Colors.white, size: 22),
          ),
          content: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            mainAxisSize: MainAxisSize.min,
            children: [
              Text(
                titre,
                style: GoogleFonts.darkerGrotesque(
                  fontSize: 16,
                  fontWeight: FontWeight.w800,
                  color: style.texte,
                ),
              ),
              const SizedBox(height: 2),
              Text(
                message,
                style: GoogleFonts.titilliumWeb(
                  fontSize: 13,
                  color: EnsupColors.text2,
                  height: 1.35,
                ),
              ),
            ],
          ),
          actions: [
            IconButton(
              tooltip: "Fermer le message",
              onPressed: () {
                _messageActif++;
                messenger.hideCurrentMaterialBanner();
              },
              icon: Icon(Icons.close, color: style.texte),
            ),
          ],
        ),
      );

    Future<void>.delayed(duree, () {
      if (_messageActif == identifiant && messenger.mounted) {
        messenger.hideCurrentMaterialBanner();
      }
    });
  }

  static String _nettoyerErreur(Object erreur) {
    return erreur
        .toString()
        .replaceFirst(RegExp(r"^(Exception|Error):\s*"), "")
        .trim();
  }

  static _AppMessageStyle _style(AppMessageType type) {
    return switch (type) {
      AppMessageType.information => const _AppMessageStyle(
        fond: Color(0xFFEFF8FC),
        couleur: EnsupColors.cyan,
        texte: EnsupColors.blue3,
        icone: Icons.info_outline,
      ),
      AppMessageType.succes => const _AppMessageStyle(
        fond: Color(0xFFF0FDF4),
        couleur: EnsupColors.green,
        texte: Color(0xFF166534),
        icone: Icons.check_circle_outline,
      ),
      AppMessageType.alerte => const _AppMessageStyle(
        fond: Color(0xFFFFF7ED),
        couleur: Color(0xFFD97706),
        texte: Color(0xFF9A3412),
        icone: Icons.warning_amber_rounded,
      ),
      AppMessageType.erreur => const _AppMessageStyle(
        fond: Color(0xFFFFF1F2),
        couleur: EnsupColors.red,
        texte: Color(0xFF9F1239),
        icone: Icons.error_outline,
      ),
    };
  }
}

class _AppMessageStyle {
  const _AppMessageStyle({
    required this.fond,
    required this.couleur,
    required this.texte,
    required this.icone,
  });

  final Color fond;
  final Color couleur;
  final Color texte;
  final IconData icone;
}