module Oxidized
  class CSV < Source
    def initialize
      @cfg = Oxidized.config.source.csv
      super
    end

    def setup
      if @cfg.empty?
        Oxidized.asetus.user.source.csv.file      = File.join(Config::Root, 'router.db')
        Oxidized.asetus.user.source.csv.delimiter = /:/
        Oxidized.asetus.user.source.csv.map.name  = 0
        Oxidized.asetus.user.source.csv.map.model = 1
        Oxidized.asetus.user.source.csv.gpg       = false
        Oxidized.asetus.save :user
        raise NoConfig, 'no source csv config, edit ~/.config/oxidized/config'
      end
      require 'gpgme' if @cfg.gpg?
    end

    def load _node_want = nil
      nodes = []
      get_file.each_line do |line|
        next if line.match(/^\s*#/)
        data = line.chomp.split(@cfg.delimiter, -1)
        next if data.empty?
        # map node parameters
        keys = {}
        @cfg.map.each do |key, position|
          keys[key.to_sym] = node_var_interpolate data[position]
        end
        keys[:model] = map_model keys[:model] if keys.has_key? :model

        # map node specific vars
        vars = {}
        @cfg.vars_map.each do |key, position|
          vars[key.to_sym] = node_var_interpolate data[position]
        end
        keys[:vars] = vars unless vars.empty?

        nodes << keys
      end
      nodes
    end

    private

    def get_file
      file = File.expand_path(@cfg.file)
      if @cfg.gpg?
        crypto = GPGME::Crypto.new password: @cfg.gpg_password
        crypto.decrypt(File.open(file)).to_s
      else
        open(file)
      end
    end
  end
end