require "sinatra"

module Provider
  class ProviderFactory

    @@providers = {}

    def self.providers
      @@providers.keys
    end

    def self.get provider
      p = @@providers[provider]
      raise ::Sinatra::NotFound.new("Provider #{provider} not found") if p.nil?
      p
    end

    def self.all
      @@providers.values
    end

    def self.init conf
      ["ec2", "openstack", "static"].each do |p|
        begin
          require "providers/#{p}"
          o = Provider.const_get(p.capitalize).new(conf)
          @@providers[p] = o if o.configured?
        rescue => e
          next
        rescue LoadError
          next
        end
      end
    end

  end
end