module PatientsHelper

# File app/helpers/patients_helper.rb, line 10
def format_nhs_number(nhs_number, invalid: false)
  span =
    if nhs_number.blank?
      "Not provided"
    else
      tag.span(class: %w[app-u-code nhsuk-u-nowrap]) do
        nhs_number.to_s.gsub(/(\d{3})(\d{3})(\d{4})/, "\\1 \\2 \\3").html_safe
      end
    end

  invalid ? tag.s(span) : span
end

# File app/helpers/patients_helper.rb, line 23
def patient_date_of_birth(patient)
  "#{patient.date_of_birth.to_fs(:long)} (aged #{patient.age_years})"
end

# File app/helpers/patients_helper.rb, line 81
def patient_needs_more_doses?(patient, programme, academic_year)
  patient.programme_status(programme, academic_year:).needs_more_doses?
end

# File app/helpers/patients_helper.rb, line 85
def patient_next_dose_label(patient, programme, academic_year)
  patient
    .programme_status(programme, academic_year:)
    .dose_sequence
    &.ordinalize
end

# File app/helpers/patients_helper.rb, line 6
def patient_nhs_number(patient)
  format_nhs_number(patient.nhs_number, invalid: patient.try(:invalidated?))
end

# File app/helpers/patients_helper.rb, line 27
def patient_outstanding_programmes(patient, session:)
  registration_status = patient.registration_status(session:)
  programmes = session.programmes_for(patient:)

  if registration_status.nil? || registration_status.unknown? ||
       registration_status.not_attending?
    return []
  end

  any_programme_exists =
    patient.vaccination_records.for_programmes(programmes).exists?(session:)

  # If this patient hasn't been seen yet by a nurse for any of the programmes,
  # we don't want to show the banner.
  return [] unless any_programme_exists

  academic_year = session.academic_year

  programmes.select do |programme|
    !patient.vaccination_records.for_programme(programme).exists?(session:) &&
      patient.consent_given_and_safe_to_vaccinate?(programme:, academic_year:)
  end
end

# File app/helpers/patients_helper.rb, line 77
def patient_parents(patient)
  format_parents_with_relationships(patient.parent_relationships)
end

# File app/helpers/patients_helper.rb, line 92
def patient_previous_dose_label(patient, programme, academic_year)
  dose = patient.programme_status(programme, academic_year:).dose_sequence
  (dose - 1).ordinalize if dose && dose > 1
end

# File app/helpers/patients_helper.rb, line 51
def patient_school(patient)
  patient&.school&.name || "Unknown school"
end

# File app/helpers/patients_helper.rb, line 97
def patient_short_name_possessive(patient)
  name = patient.short_name
  name.ends_with?("s") ? "#{name}’" : "#{name}’s"
end

# File app/helpers/patients_helper.rb, line 55
def patient_year_group(patient, academic_year:)
  str = format_year_group(patient.year_group(academic_year:))

  include_registration =
    patient.registration_academic_year == academic_year &&
      patient.registration.present?

  include_academic_year =
    academic_year != AcademicYear.current ||
      AcademicYear.current != AcademicYear.pending

  str = str.dup if include_registration || include_academic_year

  str << ", #{patient.registration}" if include_registration

  if include_academic_year
    str << " (#{format_academic_year(academic_year)} academic year)"
  end

  str
end