class Lutaml::Cli::InteractiveShell::ExportHandler

def cmd_export(args)
  return warn_no_results if last_results.nil? || last_results.empty?
  return warn_export_usage unless valid_export_args?(args)
  dispatch_export(args[1].downcase, args[2])
end

def dispatch_export(format, file_path)
  exporter = EXPORT_FORMATS[format]
  if exporter
    public_send(exporter, file_path)
  else
    puts OutputFormatter.error("Unsupported format: #{format}")
  end
end

def export_csv(file_path)
  require "csv"
  CSV.open(file_path, "w") do |csv|
    csv << ["Qualified Name"]
    last_results.each do |qname|
      csv << [qname]
    end
  end
  puts OutputFormatter.success("Exported #{last_results.size} " \
                               "results to #{file_path}")
end

def export_json(file_path)
  require "json"
  File.write(file_path, JSON.pretty_generate(last_results))
  puts OutputFormatter.success("Exported #{last_results.size} " \
                               "results to #{file_path}")
end

def export_yaml(file_path)
  require "yaml"
  File.write(file_path, last_results.to_yaml)
  puts OutputFormatter.success("Exported #{last_results.size} " \
                               "results to #{file_path}")
end

def valid_export_args?(args)
  args.size >= 3 && args[0] == "last"
end

def warn_export_usage
  puts OutputFormatter.warning("Usage: export last FORMAT FILE")
end

def warn_no_results
  puts OutputFormatter.warning("No results to export")
end