require "set"

module Danger
  # "abstract" CI class
  class CI
    attr_accessor :repo_slug, :pull_request_id, :repo_url, :supported_request_sources

    def self.inherited(child_class)
      available_ci_sources.add child_class
      super
    end

    def self.available_ci_sources
      @available_ci_sources ||= Set.new
    end

    def supported_request_sources
      raise "CISource subclass must specify the supported request sources"
    end

    def supports?(request_source)
      supported_request_sources.include?(request_source)
    end

    def self.validates_as_ci?(_env)
      abort "You need to include a function for #{self} for validates_as_ci?"
    end

    def self.validates_as_pr?(_env)
      abort "You need to include a function for #{self} for validates_as_pr?"
    end

    def initialize(_env)
      raise "Subclass and overwrite initialize"
    end
  end
end