# frozen_string_literal: true

module API
  class Features < Grape::API
    before { authenticated_as_admin! }

    helpers do
      def gate_value(params)
        case params[:value]
        when "true"
          true
        when "0", "false"
          false
        else
          params[:value].to_i
        end
      end

      def gate_targets(params)
        Feature::Target.new(params).targets
      end

      def gate_specified?(params)
        Feature::Target.new(params).gate_specified?
      end
    end

    resource :features do
      desc "Get a list of all features" do
        success Entities::Feature
      end
      get do
        features = Feature.all

        present features, with: Entities::Feature, current_user: current_user
      end

      desc "Set the gate value for the given feature" do
        success Entities::Feature
      end
      params do
        requires :value, type: String, desc: "`true` or `false` to enable/disable, an integer for percentage of time"
        optional :feature_group, type: String, desc: "A Feature group name"
        optional :user, type: String, desc: "A GitLab username"
        optional :group, type: String, desc: "A GitLab group's path, such as 'gitlab-org'"
        optional :project, type: String, desc: "A projects path, like gitlab-org/gitlab-ce"
      end
      post ":name" do
        feature = Feature.get(params[:name])
        targets = gate_targets(params)
        value = gate_value(params)

        case value
        when true
          if gate_specified?(params)
            targets.each { |target| feature.enable(target) }
          else
            feature.enable
          end
        when false
          if gate_specified?(params)
            targets.each { |target| feature.disable(target) }
          else
            feature.disable
          end
        else
          feature.enable_percentage_of_time(value)
        end

        present feature, with: Entities::Feature, current_user: current_user
      end

      desc "Remove the gate value for the given feature"
      delete ":name" do
        Feature.get(params[:name]).remove

        status 204
      end
    end
  end
end