class MiGA::Cli::Action::Stats

def parse_cli
  cli.defaults = { try_load: false }
  cli.parse do |opt|
    cli.opt_object(opt, [:project, :dataset_opt, :result])
    opt.on(
      '--key STRING',
      'Return only the value of the requested key'
    ) { |v| cli[:key] = v }
    opt.on(
      '--compute-and-save',
      'Compute and save the statistics'
    ) { |v| cli[:compute] = v }
    opt.on(
      '--try-load',
      'Check if stat exists instead of computing on --compute-and-save'
    ) { |v| cli[:try_load] = v }
    opt.on(
      '--ignore-empty',
      'If the result does not exist, exit without throwing exceptions'
    ) { |v| cli[:ignore_result_empty] = v }
  end
end

def perform
  r = cli.load_result or return
  cli[:compute] = false if cli[:try_load] && !r[:stats]&.empty?
  if cli[:compute]
    cli.say 'Computing statistics'
    r.compute_stats
  end
  if cli[:key].nil?
    r[:stats].each do |k, v|
      k_n = k.to_s.unmiga_name.sub(/^./, &:upcase)
      cli.puts "#{k_n}: #{v.is_a?(Array) ? v.join(' ') : v}"
    end
  else
    v = r[:stats][cli[:key].downcase.miga_name.to_sym]
    puts v.is_a?(Array) ? v.first : v
  end
end