module Eco::Data::Locations::NodeBase
  module CsvConvert
    include Eco::Data::Locations::NodeBase::Parsing

    def tree_class
      Eco::API::Organization::TagTree
    end

    # @yield [Node] optional custom serializer
    # @yieldreturn [Hash] the serialized Node
    # @param value [CSV::Table, Eco::API::Organization::TagTree]
    # @return [Array<Hash>] a plain list of hash nodes
    def hash_list(value, &block)
      return hash_list(org_tree(value)) if value.is_a?(::CSV::Table)
      return value.as_nodes_json        if value.is_a?(tree_class)
      raise ArgumentError, "Expecting Eco::API::Organization::TagTree or CSV::Table. Given: #{value.class}"
    end

    # @yield [Node] optional custom serializer
    # @yieldreturn [Hash] the serialized Node
    # @param value [CSV::Table, Eco::API::Organization::TagTree]
    # @return [Array<Hash>] a hierarchical tree of hash nodes,
    #   ready to be parsed as an organization tagtree
    def hash_tree(value, &block)
      return hash_tree_from_csv(value, &block) if value.is_a?(::CSV::Table)
      return value.as_json                     if value.is_a?(tree_class)
      raise ArgumentError, "Expecting Eco::API::Organization::TagTree or CSV::Table. Given: #{value.class}"
    end

    # @yield [Node] optional custom serializer
    # @yieldreturn [Hash] the serialized Node
    # @param value [CSV::Table, Eco::API::Organization::TagTree]
    # @return [Eco::API::Organization::TagTree]
    def org_tree(value, &block)
      return tree_class.new(hash_tree(value), &block) if value.is_a?(::CSV::Table)
      return tree_class.new(value.as_json)            if value.is_a?(tree_class)
      raise ArgumentError, "Expecting Eco::API::Organization::TagTree or CSV::Table. Given: #{value.class}"
    end

    # @yield [Node] optional custom serializer
    # @yieldreturn [Hash] the serialized Node
    # @return [CSV::Table] a table with L1 to Ln columns ready for dump to csv
    def csv_tree(value, encoding: 'utf-8', &block)
      Eco::CSV::Table.new(hash_tree_to_tree_csv(hash_tree(value, &block)))
    end

    # @note it just converts to an organizational tagtree and uses a helper method.
    # @yield [Node] optional custom serializer
    # @yieldreturn [Hash] the serialized Node
    # @param value [CSV::Table, Eco::API::Organization::TagTree]
    # @return [CSV::Table] a table with a list of nodes and their parents
    def csv_list(value, &block)
      value = org_tree(value, &block) unless value.is_a?(tree_class)
      Eco::CSV.Table.new(hash_list(value))
    end
  end
end