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# frozen_string_literal: true

class Feature
  prepend_if_ee('EE::Feature') # rubocop: disable Cop/InjectEnterpriseEditionModule

  SUPPORTED_FEATURE_FLAG_ADAPTERS = %w[unleash flipper]

  class << self
    delegate :all, :get, :enabled?, :remove, :group, to: :adapter

    def adapter
      @adapter ||=
        SUPPORTED_FEATURE_FLAG_ADAPTERS.find do |type|
          adapter = get_adapter(type)
          break adapter if adapter.available?
        end
    end

    def disabled?(key, thing = nil, default_enabled: false)
      # we need to make different method calls to make it easy to mock / define expectations in test mode
      thing.nil? ? !enabled?(key, default_enabled: default_enabled) : !enabled?(key, thing, default_enabled: default_enabled)
    end

    def enable(key, thing = true)
      get(key).enable(thing)
    end

    def disable(key, thing = false)
      get(key).disable(thing)
    end

    def enable_group(key, group)
      get(key).enable_group(group)
    end

    def disable_group(key, group)
      get(key).disable_group(group)
    end

    private
    
    def get_adapter(type)
      "Gitlab::FeatureFlag::Adapters::#{type.camelize}".constantize
    end
  end

  class Target
    attr_reader :params

    def initialize(params)
      @params = params
    end

    def gate_specified?
      %i(user project group feature_group).any? { |key| params.key?(key) }
    end

    def targets
      [feature_group, user, project, group].compact
    end

    private

    # rubocop: disable CodeReuse/ActiveRecord
    def feature_group
      return unless params.key?(:feature_group)

      Feature.group(params[:feature_group])
    end
    # rubocop: enable CodeReuse/ActiveRecord

    def user
      return unless params.key?(:user)

      UserFinder.new(params[:user]).find_by_username!
    end

    def project
      return unless params.key?(:project)

      Project.find_by_full_path(params[:project])
    end

    def group
      return unless params.key?(:group)

      Group.find_by_full_path(params[:group])
    end
  end
end