# frozen_string_literal: true

# Gitlab::Access module
#
# Define allowed roles that can be used
# in GitLab code to determine authorization level
#
module Gitlab
  module Access
    AccessDeniedError = Class.new(StandardError)

    NO_ACCESS  = 0
    GUEST      = 10
    REPORTER   = 20
    DEVELOPER  = 30
    MAINTAINER = 40
    # @deprecated
    MASTER     = MAINTAINER
    OWNER      = 50

    # Branch protection settings
    PROTECTION_NONE          = 0
    PROTECTION_DEV_CAN_PUSH  = 1
    PROTECTION_FULL          = 2
    PROTECTION_DEV_CAN_MERGE = 3

    # Default project creation level
    NO_ONE_PROJECT_ACCESS = 0
    MAINTAINER_PROJECT_ACCESS = 1
    DEVELOPER_MAINTAINER_PROJECT_ACCESS = 2

    # Default subgroup creation level
    OWNER_SUBGROUP_ACCESS = 0
    MAINTAINER_SUBGROUP_ACCESS = 1

    class << self
      delegate :values, to: :options

      def all_values
        options_with_owner.values
      end

      def options
        {
          "Guest"      => GUEST,
          "Reporter"   => REPORTER,
          "Developer"  => DEVELOPER,
          "Maintainer" => MAINTAINER
        }
      end

      def options_with_owner
        options.merge(
          "Owner" => OWNER
        )
      end

      def options_with_none
        options_with_owner.merge(
          "None" => NO_ACCESS
        )
      end

      def sym_options
        {
          guest:      GUEST,
          reporter:   REPORTER,
          developer:  DEVELOPER,
          maintainer: MAINTAINER
        }
      end

      def sym_options_with_owner
        sym_options.merge(owner: OWNER)
      end

      def protection_options
        {
          "Not protected: Both developers and maintainers can push new commits, force push, or delete the branch." => PROTECTION_NONE,
          "Protected against pushes: Developers cannot push new commits, but are allowed to accept merge requests to the branch. Maintainers can push to the branch." => PROTECTION_DEV_CAN_MERGE,
          "Partially protected: Both developers and maintainers can push new commits, but cannot force push or delete the branch." => PROTECTION_DEV_CAN_PUSH,
          "Fully protected: Developers cannot push new commits, but maintainers can. No-one can force push or delete the branch." => PROTECTION_FULL
        }
      end

      def protection_values
        protection_options.values
      end

      def human_access(access)
        options_with_owner.key(access)
      end

      def human_access_with_none(access)
        options_with_none.key(access)
      end

      def project_creation_options
        {
          s_('ProjectCreationLevel|No one') => NO_ONE_PROJECT_ACCESS,
          s_('ProjectCreationLevel|Maintainers') => MAINTAINER_PROJECT_ACCESS,
          s_('ProjectCreationLevel|Developers + Maintainers') => DEVELOPER_MAINTAINER_PROJECT_ACCESS
        }
      end

      def project_creation_values
        project_creation_options.values
      end

      def project_creation_level_name(name)
        project_creation_options.key(name)
      end
    end

    def human_access
      Gitlab::Access.human_access(access_field)
    end

    def human_access_with_none
      Gitlab::Access.human_access_with_none(access_field)
    end

    def owner?
      access_field == OWNER
    end
  end
end