namespace :website do
  namespace :domains do
    desc <<-DESC
      Attach a domain to the current website. This can be one of:
      
        * A domain of your own: setup instructions will be displayed after
          successful attachment. For example: "foobar.com".
      
        * A free subdomain: choose one ending with ".flucti.com": immediately
          available, setup required.
          For example: "foobar.flucti.com".
      
        * A subdomain of either a domain of your own or a free subdomain.
          For example: "blog.foobar.com" or "blog.foobar.flucti.com".
      
        * A wildcard subdomain.
          For example: "*.foobar.com" or "*.foobar.flucti.com"
      
      Environment variables:
        $DOMAIN: the domain name.
    DESC
    task :attach do
      site = website.fetch_current!
      name = require_name!
      
      domain = site.domains.build(:name => name)
      
      examples = []
      try_save domain do
        puts_title("Request sent")
        puts_long <<-INFO
          * Domain #{q domain} has been scheduled for attachment to website
            #{q site}.
        INFO
        if domain.attribute_set?(:cname_domain_name)
          puts
          puts_long <<-INFO 
            * For #{q domain} to point to your VPS's, you must go to your
              registrar's control panel, clear any previous A or CNAME
              records, and add a CNAME record to #{q domain.cname_domain_name}.
          INFO
        end
      end
    end
    
    desc "Alias for `attach'."
    task(:add) { attach }
    
    desc <<-DESC
      Detach a domain from the current website. By doing so, the website will
      cease to be available at the specified domain.
      
      Environment variables:
        $DOMAIN: the domain name.
    DESC
    task :detach do
      site = website.fetch_current!
      name = require_name!
      
      domain = site.domains.find(name)
      domain.destroy
      
      puts_title("Request sent")
      puts "Domain #{q domain} has been scheduled for detachment from website #{q site}."
    end
    
    desc "Alias for `attach'."
    task(:remove) { detach }
    
    desc <<-DESC
      List all domains that need a CNAME record. In order for the domains you
      own to point to the VPS hosting a site, you need to declare a CNAME
      record on the DNS server of the domains, most likely managed by the
      registrar they have been bought from.
      
      Please note that it can take up to 48 hours for the changes to
      propagate.
      
      Free subdomains don't need such a declaration since they are handled on
      our side. That is why they are not listed. As a consequence, they are
      functional immediately.
    DESC
    task :cnames do
      site = website.fetch_current!
      
      domains_with_cname = site.domains.select { |dom| dom.cname_domain_name }
      
      if domains_with_cname.any?
        puts_list(domains_with_cname, :id => false, :table => true) do |t|
          t.col("Domain", :name)
          t.col("CNAME", :cname_domain_name)
        end
      else
        puts "No domain needs to be declared CNAME records."
      end
    end
    
    def require_name!
      ENV["DOMAIN"] or
        error! <<-MSG
          The domain name to deal with must be specified by setting the
          $DOMAIN environment variable. To list all domains currently attached
          to the current website, run #{qcommand "website"}.
        MSG
    end
  end
end