module Netzke
  class FormPanel < Base
    module FormPanelApi
      # API handling form submission
      def netzke_submit(params)
        success = create_or_update_record(params)

        if success
          {:set_form_values => array_of_values, :set_result => "ok"}
        else
          # flash eventual errors
          @record.errors.each_full do |msg|
            flash :error => msg
          end
          {:feedback => @flash}
        end
      end

      # Creates/updates a record from hash
      def create_or_update_record(params)
        hsh = ActiveSupport::JSON.decode(params[:data])
        hsh.merge!(config[:strong_default_attrs]) if config[:strong_default_attrs]
        @record ||= data_class.find(:first, :conditions => {data_class.primary_key => hsh.delete(data_class.primary_key)}) # only pick up the record specified in the params if it was not provided in the configuration
        success = true

        @record = data_class.new if @record.nil?

        hsh.each_pair do |k,v|
          begin
            @record.send("#{k}=",v)
          rescue StandardError => exc
            flash :error => exc.message
            success = false
            break
          end
        end
    
        # did we have complete success?
        success && @record.save
      end

      # API handling form load
      # def load(params)
      #   klass = config[:model].constantize
      #   case params[:neighbour]
      #     when "previous" then @record = klass.previous(params[:id])
      #     when "next"     then @record = klass.next(params[:id])
      #     else                 @record = klass.find(params[:id])
      #   end
      #   {:data => [array_of_values]}
      # end
  
      def netzke_load(params)
        @record = data_class && data_class.find_by_id(params[:id])
        {:set_form_values => array_of_values}
      end
  
      # API that returns options for a combobox
      def get_combobox_options(params)
        column = params[:column]
        query = params[:query]

        {:data => data_class.options_for(column, query).map{|s| [s]}}
      end
  
      def configuration_panel__fields__get_combobox_options(params)
        query = params[:query]
        {:data => (default_columns.map{ |c| c[:name].to_s }).grep(/^#{query}/).map{ |n| [n] }}.to_nifty_json
      end
  
      # Returns array of form values according to the configured columns
      def array_of_values
        @record && @record.to_array(fields, self)
      end
    end
  end
end