class VaccineCriteria

# File app/lib/vaccine_criteria.rb, line 10
def self.from_consentable(consentable)
  new(
    programme: consentable.programme,
    vaccine_methods: consentable.vaccine_methods,
    without_gelatine: consentable.without_gelatine
  )
end

# File app/lib/vaccine_criteria.rb, line 18
def self.from_param(param)
  parts = param.split("_")

  programme_type = parts.shift
  without_gelatine = parts.last(2) == WITHOUT_GELATINE_SUFFIX
  vaccine_methods = without_gelatine ? parts[0..-3] : parts

  programme = Programme.find(programme_type)
  new(programme:, vaccine_methods:, without_gelatine:)
end

# File app/lib/vaccine_criteria.rb, line 29
def self.from_programme_status(programme_status)
  new(
    programme: programme_status.programme,
    vaccine_methods: programme_status.vaccine_methods,
    without_gelatine: programme_status.without_gelatine
  )
end

# File app/lib/vaccine_criteria.rb, line 4
def initialize(programme:, vaccine_methods:, without_gelatine:)
  @programme = programme
  @vaccine_methods = vaccine_methods
  @without_gelatine = without_gelatine
end

# File app/lib/vaccine_criteria.rb, line 54
def apply(scope)
  scope = scope.with_disease_types(programme.disease_types)

  if vaccine_methods.present?
    scope = scope.where(method: vaccine_methods).order(method_order_node)
  end

  scope = scope.where(contains_gelatine: false) if without_gelatine

  scope
end

# File app/lib/vaccine_criteria.rb, line 42
def primary_method
  vaccine_methods&.first
end

# File app/lib/vaccine_criteria.rb, line 46
def side_effects
  Vaccine
    .for_programme(programme)
    .active
    .where(method: primary_method)
    .flat_map(&:side_effects)
end

# File app/lib/vaccine_criteria.rb, line 66
def to_param
  parts = []

  parts << programme.type
  parts += vaccine_methods
  parts << WITHOUT_GELATINE_SUFFIX.join("_") if without_gelatine

  parts.join("_")
end