defmodule KlifeProtocol.Header do
    @moduledoc """
    Kafka protocol header
    """

    alias KlifeProtocol.Deserializer
    alias KlifeProtocol.Serializer

    <%= Enum.map(request_schemas, fn {version, schema} ->
        """
        def request_schema(#{version}), do: #{inspect(schema)}
        """
    end) %>

    <%= Enum.map(response_schemas, fn {version, schema} ->
        """
        def response_schema(#{version}), do: #{inspect(schema)}
        """
    end) %>

    @doc """
    Receives a map and serialize it to kafka wire format of the given version.

    Input content fields:
    <%= Enum.map(req_field_comments, fn {line, depth} ->
        if depth == 0 do
            line <>  "\n"
        else
            base_space = "    "
            extra_space =
            Enum.map(1..depth, fn _ -> base_space end)
            |> Enum.join()

            base_space <> extra_space <> line <> "\n"
        end
    end) %>
    """
    def serialize_request(data, version),
    do: Serializer.execute(data, request_schema(version))

    @doc """
    Receive a binary in the kafka wire format and deserialize it into a map and return remaining binary data.

    Response content fields:

    <%= Enum.map(res_field_comments, fn {line, depth} ->
        if depth == 0 do
            line <>  "\n"
        else
            base_space = "    "
            extra_space =
            Enum.map(1..depth, fn _ -> base_space end)
            |> Enum.join()

            base_space <> extra_space <> line <> "\n"
        end
    end) %>
    """
    def deserialize_response(data, version),
    do: Deserializer.execute(data, response_schema(version))

end