class Chef::Knife::SupermarketDownload

def cookbooks_api_url
  "#{config[:supermarket_site]}/api/v1/cookbooks"
end

def current_cookbook_data
  @current_cookbook_data ||= noauth_rest.get "#{cookbooks_api_url}/#{@name_args[0]}"
end

def current_cookbook_deprecated?
  current_cookbook_data["deprecated"] == true
end

def desired_cookbook_data
  @desired_cookbook_data ||= begin
                               uri = if @name_args.length == 1
                                       current_cookbook_data["latest_version"]
                                     else
                                       specific_cookbook_version_url
                                     end
                               noauth_rest.get uri
                             end
end

def download_cookbook
  ui.info "Downloading #{@name_args[0]} from Supermarket at version #{version} to #{download_location}"
  tf = noauth_rest.streaming_request(desired_cookbook_data["file"])
  ::FileUtils.cp tf.path, download_location
  ui.info "Cookbook saved: #{download_location}"
end

def download_location
  config[:file] ||= File.join Dir.pwd, "#{@name_args[0]}-#{version}.tar.gz"
  config[:file]
end

def replacement_cookbook
  File.basename(current_cookbook_data["replacement"] || "")
end

def run
  if current_cookbook_deprecated?
    message = "DEPRECATION: This cookbook has been deprecated. "
    replacement = replacement_cookbook
    if !replacement.to_s.strip.empty?
      message << "It has been replaced by #{replacement}."
    else
      message << "No replacement has been defined."
    end
    ui.warn message
    unless config[:force]
      ui.warn "Use --force to force download deprecated cookbook."
      return
    end
  end
  download_cookbook
end

def specific_cookbook_version_url
  "#{cookbooks_api_url}/#{@name_args[0]}/versions/#{@name_args[1].tr(".", "_")}"
end

def version
  @version = desired_cookbook_data["version"]
end