module Primer::FetchOrFallbackHelper

def fetch_or_fallback(allowed_values, given_value, fallback = nil, deprecated_values: nil)
  if allowed_values.include?(given_value)
    given_value
  elsif deprecated_values&.include?(given_value)
    ::Primer::ViewComponents.deprecation.warn("#{given_value} is deprecated and will be removed in a future version.") unless Rails.env.production? || silence_deprecations?
    given_value
  else
    if fallback_raises && ENV["RAILS_ENV"] != "production"
      raise InvalidValueError, <<~MSG
        fetch_or_fallback was called with an invalid value.
        Expected one of: #{allowed_values.inspect}
        Got: #{given_value.inspect}
        This will not raise in production, but will instead fallback to: #{fallback.inspect}
      MSG
    end
    fallback
  end
end

def fetch_or_fallback_boolean(given_value, fallback = false)
  if [true, false].include?(given_value)
    given_value
  else
    fallback
  end
end

def silence_deprecations?
  Rails.application.config.primer_view_components.silence_deprecations
end