require "vagrant"

module VagrantPlugins
  module Skytap
    class Config < Vagrant.plugin("2", :config)
      # The user id for accessing Skytap.
      #
      # @return [String]
      attr_accessor :username

      # The secret API token for accessing Skytap.
      #
      # @return [String]
      attr_accessor :api_token

      # The base URL for Skytap API calls.
      #
      # @return [String]
      attr_accessor :base_url

      # The url of the source VM to use.
      #
      # @return [String]
      attr_accessor :vm_url

      # The timeout to wait for a VM to become ready.
      #
      # @return [Fixnum]
      attr_accessor :instance_ready_timeout

      # The total number of virtual CPUs for this VM.
      #
      # @return [Integer]
      attr_accessor :cpus

      # The number of virtual CPUs per socket.
      #
      # @return [Integer]
      attr_accessor :cpuspersocket

      # The RAM to use for this machine (measured in MB).
      #
      # @return [Integer]
      attr_accessor :ram

      # The VMware guest OS setting for this machine.
      #
      # @return [String]
      attr_accessor :guestos

      def initialize(region_specific=false)
        @username               = UNSET_VALUE
        @api_token              = UNSET_VALUE
        @base_url               = UNSET_VALUE
        @vm_url                 = UNSET_VALUE
        @instance_ready_timeout = UNSET_VALUE
        @region                 = UNSET_VALUE

        @cpus                   = UNSET_VALUE
        @cpuspersocket          = UNSET_VALUE
        @ram                    = UNSET_VALUE
        @guestos                = UNSET_VALUE
      end

      #-------------------------------------------------------------------
      # Internal methods.
      #-------------------------------------------------------------------

      def finalize!
        # Try to get access keys from standard Skytap environment variables; they
        # will default to nil if the environment variables are not present.
        @username  = ENV['VAGRANT_SKYTAP_USERNAME']  if @username  == UNSET_VALUE
        @api_token = ENV['VAGRANT_SKYTAP_API_TOKEN'] if @api_token == UNSET_VALUE

        # Base URL for API calls.
        @base_url = "https://cloud.skytap.com/" if @base_url == UNSET_VALUE

        # Source VM url must be set.
        @vm_url = nil if @vm_url == UNSET_VALUE

        # Set the default timeout for waiting for an instance to be ready
        @instance_ready_timeout = 120 if @instance_ready_timeout == UNSET_VALUE

        # Hardware settings default to nil (will be obtained
        # from the source VM)
        @cpus          = nil if @cpus          == UNSET_VALUE
        @cpuspersocket = nil if @cpuspersocket == UNSET_VALUE
        @ram           = nil if @ram           == UNSET_VALUE
        @guestos       = nil if @guestos       == UNSET_VALUE

        # Mark that we finalized
        @__finalized = true
      end

      def validate(machine)
        errors = _detected_errors

        errors << I18n.t('vagrant_skytap.config.username_required') unless username
        errors << I18n.t('vagrant_skytap.config.api_token_required') unless api_token
        errors << I18n.t('vagrant_skytap.config.vm_url_required') unless vm_url

        { "Skytap Provider" => errors }
      end
    end
  end
end