function dedupeStrings(values = []) {
  return [...new Set(
    values
      .filter((value) => typeof value === 'string')
      .map((value) => value.trim())
      .filter(Boolean)
  )];
}

export function dedupeDocumentNames(values = []) {
  return dedupeStrings(values);
}

export function buildStaffOrderEligibilityBlockers({
  hasActiveWorkforce = true,
  businessBlockReason = null,
  hasExistingParticipation = false,
  missingDocumentNames = [],
} = {}) {
  const blockers = [];

  if (!hasActiveWorkforce) {
    blockers.push('Workforce profile is not active');
  }

  if (businessBlockReason !== null && businessBlockReason !== undefined) {
    blockers.push(businessBlockReason
      ? `You are blocked from working for this client: ${businessBlockReason}`
      : 'You are blocked from working for this client');
  }

  if (hasExistingParticipation) {
    blockers.push('You already applied to or booked this order');
  }

  blockers.push(...dedupeDocumentNames(missingDocumentNames).map((name) => `Missing required document: ${name}`));

  return dedupeStrings(blockers);
}