const stageOrder = [
  'received',
  'orderedByCustomer',
  'documentsProcessed',
  'paymentApproved',
  'rmvRegistration',
  'plateReceived',
];

const modelOptions = ['gn125', 'boxer125', 'click150i'];

const sriLankaDistricts = [
  'Ampara',
  'Anuradhapura',
  'Badulla',
  'Batticaloa',
  'Colombo',
  'Galle',
  'Gampaha',
  'Hambantota',
  'Jaffna',
  'Kalutara',
  'Kandy',
  'Kegalle',
  'Kilinochchi',
  'Kurunegala',
  'Mannar',
  'Matale',
  'Matara',
  'Moneragala',
  'Mullaitivu',
  'Nuwara Eliya',
  'Polonnaruwa',
  'Puttalam',
  'Ratnapura',
  'Trincomalee',
  'Vavuniya',
];

String stageLabel(String stage) {
  switch (stage) {
    case 'received':
      return 'Received';
    case 'orderedByCustomer':
      return 'Ordered by customer';
    case 'documentsProcessed':
      return 'Documents processed';
    case 'paymentApproved':
      return 'Payment approved';
    case 'rmvRegistration':
      return 'RMV registration';
    case 'plateReceived':
      return 'Plate received';
    default:
      return stage;
  }
}

String? nextStage(String stage) {
  final index = stageOrder.indexOf(stage);
  if (index < 0 || index >= stageOrder.length - 1) return null;
  return stageOrder[index + 1];
}

String modelLabel(String model) {
  switch (model) {
    case 'gn125':
      return 'GN125';
    case 'boxer125':
      return 'Boxer 125';
    case 'click150i':
      return 'Click 150i';
    default:
      return model;
  }
}

String roleLabel(String role) {
  switch (role) {
    case 'superAdmin':
      return 'Super admin';
    case 'salesRep':
      return 'Sales rep';
    case 'dealer':
      return 'Dealer';
    default:
      return role;
  }
}

String leaseProviderLabel(String provider) {
  switch (provider) {
    case 'gci':
      return 'GCI';
    case 'thirdPartyFinance':
      return 'Finance';
    case 'both':
      return 'GCI and finance';
    default:
      return provider;
  }
}

String planLabel(String planType) {
  switch (planType) {
    case 'monthlySpecial':
      return 'Monthly special';
    case 'general':
      return 'General';
    default:
      return planType;
  }
}