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

/// The modules a cashier needs. Deliberately excludes analytics — this
/// terminal is for billing, not back-office reporting.
enum PosModule {
  pos('Point of Sale', 'POS', Icons.point_of_sale_rounded, NavSection.billing),
  customers('Customers', 'Customers', Icons.people_alt_rounded,
      NavSection.billing,),

  productImport('Product Import', 'Product Import',
      Icons.cloud_download_rounded, NavSection.catalogue,),
  promos('Promotions', 'Promo', Icons.sell_rounded, NavSection.catalogue),

  events('Events', 'Events', Icons.sync_rounded, NavSection.session),
  settings('Settings', 'Settings', Icons.settings_rounded, NavSection.session);

  const PosModule(this.title, this.label, this.icon, this.section);

  /// Long form, shown in the page header.
  final String title;

  /// Short form, shown in the sidebar.
  final String label;

  final IconData icon;
  final NavSection section;
}

/// Groups the navigation into labelled blocks.
enum NavSection {
  billing('Billing'),
  catalogue('Catalogue'),
  session('Session');

  const NavSection(this.label);

  final String label;

  List<PosModule> get modules =>
      PosModule.values.where((m) => m.section == this).toList();
}

final activeModuleProvider = StateProvider<PosModule>((ref) => PosModule.pos);