% ==============================
% Rabbit app section
% ==============================

%%
%% Network Connectivity
%% ====================
%%

%% By default, RabbitMQ will listen on all interfaces, using
%% the standard (reserved) AMQP port.
%%
%% {tcp_listeners, [5672]},
%% To listen on a specific interface, provide a tuple of {IpAddress, Port}.
%% For example, to listen only on localhost for both IPv4 and IPv6:
%%
%% {tcp_listeners, [{"127.0.0.1", 5672},
%%                  {"::1",       5672}]},

{mapping, "listener.tcp.$name", "rabbit.tcp_listeners",[
    {datatype, [integer, ip]}
]}.

{translation, "rabbit.tcp_listeners",
fun(Conf) ->
    Settings = cuttlefish_variable:filter_by_prefix("listener.tcp", Conf),
    [ V || {_, V} <- Settings ]
end}.

%% SSL listeners are configured in the same fashion as TCP listeners,
%% including the option to control the choice of interface.
%%
%% {ssl_listeners, [5671]},

{mapping, "listener.ssl.$name", "rabbit.ssl_listeners",[
    {datatype, [integer, ip]}
]}.

{translation, "rabbit.ssl_listeners",
fun(Conf) ->
    Settings = cuttlefish_variable:filter_by_prefix("listener.ssl", Conf),
    [ V || {_, V} <- Settings ]
end}.

%% Number of Erlang processes that will accept connections for the TCP
%% and SSL listeners.
%%
%% {num_tcp_acceptors, 10},
%% {num_ssl_acceptors, 1},

{mapping, "num_acceptors.ssl", "rabbit.num_ssl_acceptors", [
    {datatype, integer}
]}.

{mapping, "num_acceptors.tcp", "rabbit.num_tcp_acceptors", [
    {datatype, integer}
]}.


%% Maximum time for AMQP 0-8/0-9/0-9-1 handshake (after socket connection
%% and SSL handshake), in milliseconds.
%%
%% {handshake_timeout, 10000},

{mapping, "handshake_timeout", "rabbit.handshake_timeout", [
    {datatype, integer}
]}.

%% Set to 'true' to perform reverse DNS lookups when accepting a
%% connection. Hostnames will then be shown instead of IP addresses
%% in rabbitmqctl and the management plugin.
%%
%% {reverse_dns_lookups, true},

{mapping, "reverse_dns_lookups", "rabbit.reverse_dns_lookups", [
    {datatype, {enum, [true, false]}}
]}.

{mapping, "erlang.K", "vm_args.+K", [
  {default, "true"},
  {level, advanced}
]}.

%%
%% Security / AAA
%% ==============
%%

%% The default "guest" user is only permitted to access the server
%% via a loopback interface (e.g. localhost).
%% {loopback_users, [<<"guest">>]},
%%
%% Uncomment the following line if you want to allow access to the
%% guest user from anywhere on the network.
%% {loopback_users, []},

{mapping, "loopback_user.$user", "rabbit.loopback_users", [
    {datatype, atom}
]}.

{translation, "rabbit.loopback_users",
fun(Conf) ->
    Settings = cuttlefish_variable:filter_by_prefix("loopback_user", Conf),
    [ list_to_binary(U) || {["loopback_user", U], V} <- Settings, V == true ]
end}.

%% Configuring SSL.
%% See http://www.rabbitmq.com/ssl.html for full documentation.
%%
%% {ssl_options, [{cacertfile,           "/path/to/testca/cacert.pem"},
%%                {certfile,             "/path/to/server/cert.pem"},
%%                {keyfile,              "/path/to/server/key.pem"},
%%                {verify,               verify_peer},
%%                {fail_if_no_peer_cert, false}]},

%% SSL options section ========================================================

{mapping, "ssl_option.verify", "rabbit.ssl_options.verify", [
    {datatype, {enum, [verify_peer, verify_none]}}]}.

{mapping, "ssl_option.fail_if_no_peer_cert", "rabbit.ssl_options.fail_if_no_peer_cert", [
    {datatype, {enum, [true, false]}}]}.

{mapping, "ssl_option.cacertfile", "rabbit.ssl_options.cacertfile", 
    [{datatype, string}, {validators, ["file_accessible"]}]}.

{mapping, "ssl_option.certfile", "rabbit.ssl_options.certfile", 
    [{datatype, string}, {validators, ["file_accessible"]}]}.

{mapping, "ssl_option.cacerts.$name", "rabbit.ssl_options.cacerts", 
    [{datatype, string}]}.

{translation, "rabbit.ssl_options.cacerts",
fun(Conf) ->
    Settings = cuttlefish_variable:filter_by_prefix("ssl_option.cacerts", Conf),
    [ list_to_binary(V) || {_, V} <- Settings ]
end}.

{mapping, "ssl_option.cert", "rabbit.ssl_options.cert", 
    [{datatype, string}]}.

{translation, "rabbit.ssl_options.cert",
fun(Conf) ->
    list_to_binary(cuttlefish:conf_get("ssl_option.cert", Conf))
end}.

{mapping, "ssl_option.client_renegotiation", "rabbit.ssl_options.client_renegotiation", 
    [{datatype, {enum, [true, false]}}]}.

{mapping, "ssl_option.crl_check", "rabbit.ssl_options.crl_check", 
    [{datatype, [{enum, [true, false, peer, best_effort]}]}]}.

{mapping, "ssl_option.depth", "rabbit.ssl_options.depth", 
    [{datatype, integer}, {validators, ["byte"]}]}.

{mapping, "ssl_option.dh", "rabbit.ssl_options.dh", 
    [{datatype, string}]}.

{translation, "rabbit.ssl_options.dh",
fun(Conf) ->
    list_to_binary(cuttlefish:conf_get("ssl_option.dh", Conf))
end}.

{mapping, "ssl_option.dhfile", "rabbit.ssl_options.dhfile", 
    [{datatype, string}, {validators, ["file_accessible"]}]}.

{mapping, "ssl_option.honor_cipher_order", "rabbit.ssl_options.honor_cipher_order", 
    [{datatype, {enum, [true, false]}}]}.

{mapping, "ssl_option.key.RSAPrivateKey", "rabbit.ssl_options.key", 
    [{datatype, string}]}.

{mapping, "ssl_option.key.DSAPrivateKey", "rabbit.ssl_options.key", 
    [{datatype, string}]}.

{mapping, "ssl_option.key.PrivateKeyInfo", "rabbit.ssl_options.key", 
    [{datatype, string}]}.

{translation, "rabbit.ssl_options.key",
fun(Conf) ->
    case cuttlefish_variable:filter_by_prefix("ssl_option.key", Conf) of
        [{[_,_,Key], Val}|_] -> {list_to_atom(Key), list_to_binary(Val)};
        _ -> undefined
    end
end}.

{mapping, "ssl_option.keyfile", "rabbit.ssl_options.keyfile", 
    [{datatype, string}, {validators, ["file_accessible"]}]}.

{mapping, "ssl_option.log_alert", "rabbit.ssl_options.log_alert", 
    [{datatype, {enum, [true, false]}}]}.

{mapping, "ssl_option.password", "rabbit.ssl_options.password", 
    [{datatype, string}]}.

{mapping, "ssl_option.psk_identity", "rabbit.ssl_options.psk_identity", 
    [{datatype, string}]}.

{mapping, "ssl_option.reuse_sessions", "rabbit.ssl_options.reuse_sessions", 
    [{datatype, {enum, [true, false]}}]}.

{mapping, "ssl_option.secure_renegotiate", "rabbit.ssl_options.secure_renegotiate", 
    [{datatype, {enum, [true, false]}}]}.

{mapping, "ssl_option.versions.$version", "rabbit.ssl_options.versions", 
    [{datatype, atom}]}.

{translation, "rabbit.ssl_options.versions",
fun(Conf) ->
    Settings = cuttlefish_variable:filter_by_prefix("ssl_option.cacerts", Conf),
    [ V || {_, V} <- Settings ]
end}.

%% ===========================================================================

%% Choose the available SASL mechanism(s) to expose.
%% The two default (built in) mechanisms are 'PLAIN' and
%% 'AMQPLAIN'. Additional mechanisms can be added via
%% plugins.
%%
%% See http://www.rabbitmq.com/authentication.html for more details.
%%
%% {auth_mechanisms, ['PLAIN', 'AMQPLAIN']},

{mapping, "auth_mechanism.$name", "rabbit.auth_mechanisms", [
    {datatype, atom}]}.

{translation, "rabbit.auth_mechanisms", 
fun(Conf) ->
    Settings = cuttlefish_variable:filter_by_prefix("auth_mechanism", Conf),
    [ V || {_, V} <- Settings ]
end}.


%% Select an authentication database to use. RabbitMQ comes bundled
%% with a built-in auth-database, based on mnesia.
%%
%% {auth_backends, [rabbit_auth_backend_internal]},

{translation, "rabbit.auth_backends", 
fun(Conf) ->
    Settings = cuttlefish_variable:filter_by_prefix("auth_backends", Conf),
    BackendModule = fun
        (internal) -> rabbit_auth_backend_internal;
        (ldap)     -> rabbit_auth_backend_ldap;
        (http)     -> rabbit_auth_backend_http;
        (amqp)     -> rabbit_auth_backend_amqp;
        (dummy)    -> rabbit_auth_backend_dummy;
        (Other) when is_atom(Other) -> Other;
        (_) -> cuttlefish:invalid("Invalid auth backend")
    end,
    AuthBackends = [ {Num, {default, BackendModule(V)}} || {["auth_backends", Num], V} <- Settings ],
    AuthNBackends = [ {Num, {authn, BackendModule(V)}} || {["auth_backends", Num, "authn"], V} <- Settings ],
    AuthZBackends = [ {Num, {authz, BackendModule(V)}} || {["auth_backends", Num, "authz"], V} <- Settings ],
    Backends = lists:foldl(
        fun({NumStr, {Type, V}}, Acc) ->
            Num = case catch list_to_integer(NumStr) of
                N when is_integer(N) -> N;
                Err -> 
                    cuttlefish:invalid(
                        iolist_to_binary(io_lib:format(
                            "Auth backend number should be integer ~p", [Err])))
            end,
            NewVal = case dict:find(Num, Acc) of
                {ok, {AuthN, AuthZ}} ->
                    case {Type, AuthN, AuthZ} of
                        {authn, undefined, _} ->
                            {V, AuthZ};
                        {authz, _, undefined} ->
                            {AuthN, V};
                        _ ->
                            cuttlefish:invalid(
                                iolist_to_binary(
                                    io_lib:format(
                                        "Auth backend already defined for ~pth ~p backend", 
                                        [Num, Type])))
                    end;
                error ->
                    case Type of
                        authn   -> {V, undefined};
                        authz   -> {undefined, V};
                        default -> {V, V}
                    end
            end,
            dict:store(Num, NewVal, Acc)
        end,
        dict:new(),
        AuthBackends ++ AuthNBackends ++ AuthZBackends),
    lists:map(
        fun
            ({Num, {undefined, AuthZ}}) ->
                cuttlefish:warn(
                    io_lib:format(
                        "Auth backend undefined for ~pth authz backend. Using ~p", 
                        [Num, AuthZ])),
                {AuthZ, AuthZ};
            ({Num, {AuthN, undefined}}) ->
                cuttlefish:warn(
                    io_lib:format(
                        "Auth backend undefined for ~pth authn backend. Using ~p", 
                        [Num, AuthN])),
                {AuthN, AuthN};
            ({_Num, {Auth, Auth}})   -> Auth;
            ({_Num, {AuthN, AuthZ}}) -> {AuthN, AuthZ}
        end,
        lists:keysort(1, dict:to_list(Backends)))
end}.

{mapping, "auth_backends.$num", "rabbit.auth_backends", [
    {datatype, atom}
]}.

{mapping, "auth_backends.$num.authn", "rabbit.auth_backends",[
    {datatype, atom}
]}.

{mapping, "auth_backends.$num.authz", "rabbit.auth_backends",[
    {datatype, atom}
]}.

%% This pertains to both the rabbitmq_auth_mechanism_ssl plugin and
%% STOMP ssl_cert_login configurations. See the rabbitmq_stomp
%% configuration section later in this file and the README in
%% https://github.com/rabbitmq/rabbitmq-auth-mechanism-ssl for further
%% details.
%%
%% To use the SSL cert's CN instead of its DN as the username
%%
%% {ssl_cert_login_from, common_name},

{mapping, "ssl_cert_login_from", "rabbit.ssl_cert_login_from", [
    {datatype, {enum, [distinguished_name, common_name]}}
]}.

%% SSL handshake timeout, in milliseconds.
%%
%% {ssl_handshake_timeout, 5000},

{mapping, "ssl_handshake_timeout", "rabbit.ssl_handshake_timeout", [
    {datatype, integer}
]}.

%% Password hashing implementation. Will only affect newly
%% created users. To recalculate hash for an existing user
%% it's necessary to update her password.
%%
%% When importing definitions exported from versions earlier
%% than 3.6.0, it is possible to go back to MD5 (only do this
%% as a temporary measure!) by setting this to rabbit_password_hashing_md5.
%%
%% To use SHA-512, set to rabbit_password_hashing_sha512.
%%
%% {password_hashing_module, rabbit_password_hashing_sha256},

{mapping, "password_hashing_module", "rabbit.password_hashing_module", [
    {datatype, atom}
]}.

%%
%% Default User / VHost
%% ====================
%%

%% On first start RabbitMQ will create a vhost and a user. These
%% config items control what gets created. See
%% http://www.rabbitmq.com/access-control.html for further
%% information about vhosts and access control.
%%
%% {default_vhost,       <<"/">>},
%% {default_user,        <<"guest">>},
%% {default_pass,        <<"guest">>},
%% {default_permissions, [<<".*">>, <<".*">>, <<".*">>]},

{mapping, "default_vhost", "rabbit.default_vhost", [
    {datatype, string}
]}.

{translation, "rabbit.default_vhost",
fun(Conf) ->
    list_to_binary(cuttlefish:conf_get("default_vhost", Conf))
end}.

{mapping, "default_user", "rabbit.default_user", [
    {datatype, string}
]}.

{translation, "rabbit.default_user",
fun(Conf) ->
    list_to_binary(cuttlefish:conf_get("default_user", Conf))
end}.

{mapping, "default_pass", "rabbit.default_pass", [
    {datatype, string}
]}.

{translation, "rabbit.default_pass",
fun(Conf) ->
    list_to_binary(cuttlefish:conf_get("default_pass", Conf))
end}.

{mapping, "default_permissions.configure", "rabbit.default_permissions", [
    {datatype, string}
]}.

{mapping, "default_permissions.read", "rabbit.default_permissions", [
    {datatype, string}
]}.

{mapping, "default_permissions.write", "rabbit.default_permissions", [
    {datatype, string}
]}.

{translation, "rabbit.default_permissions", 
fun(Conf) ->
    Settings  = cuttlefish_variable:filter_by_prefix("default_permissions", Conf),
    Configure = proplists:get_value(["default_permissions", "configure"], Settings),
    Read      = proplists:get_value(["default_permissions", "read"], Settings),
    Write     = proplists:get_value(["default_permissions", "write"], Settings),
    [list_to_binary(Configure), list_to_binary(Read), list_to_binary(Write)]
end}.

%% Tags for default user
%%
%% For more details about tags, see the documentation for the
%% Management Plugin at http://www.rabbitmq.com/management.html.
%%
%% {default_user_tags, [administrator]},

{mapping, "default_user_tags.$tag", "rabbit.default_user_tags", 
    [{datatype, {enum, [true, false]}}]}.

{translation, "rabbit.default_user_tags",
fun(Conf) ->
    Settings  = cuttlefish_variable:filter_by_prefix("default_user_tags", Conf),
    [ list_to_atom(Key) || {[_,Key], Val} <- Settings, Val == true ]
end}.

%%
%% Additional network and protocol related configuration
%% =====================================================
%%

%% Set the default AMQP heartbeat delay (in seconds).
%%
%% {heartbeat, 600},

{mapping, "heartbeat", "rabbit.heartbeat", [{datatype, integer}]}.

%% Set the max permissible size of an AMQP frame (in bytes).
%%
%% {frame_max, 131072},

{mapping, "frame_max", "rabbit.frame_max", [{datatype, bytesize}]}.

%% Set the max frame size the server will accept before connection
%% tuning occurs
%%
%% {initial_frame_max, 4096},

{mapping, "initial_frame_max", "rabbit.initial_frame_max", [{datatype, bytesize}]}.

%% Set the max permissible number of channels per connection.
%% 0 means "no limit".
%%
%% {channel_max, 128},

{mapping, "channel_max", "rabbit.channel_max", [{datatype, integer}]}.

%% Customising Socket Options.
%%
%% See (http://www.erlang.org/doc/man/inet.html#setopts-2) for
%% further documentation.
%%
%% {tcp_listen_options, [{backlog,       128},
%%                       {nodelay,       true},
%%                       {exit_on_close, false}]},

%% TCP listener section ======================================================

{mapping, "tcp_listen_option.backlog", "rabbit.tcp_listen_options.backlog", [
    {datatype, integer}
]}.

{mapping, "tcp_listen_option.nodelay", "rabbit.tcp_listen_options.nodelay", [
    {datatype, {enum, [true, false]}}
]}.

{mapping, "tcp_listen_option.buffer", "rabbit.tcp_listen_options.buffer", 
    [{datatype, integer}]}.

{mapping, "tcp_listen_option.delay_send", "rabbit.tcp_listen_options.delay_send", 
    [{datatype, {enum, [true, false]}}]}.

{mapping, "tcp_listen_option.dontroute", "rabbit.tcp_listen_options.dontroute", 
    [{datatype, {enum, [true, false]}}]}.

{mapping, "tcp_listen_option.exit_on_close", "rabbit.tcp_listen_options.exit_on_close", 
    [{datatype, {enum, [true, false]}}]}.

{mapping, "tcp_listen_option.fd", "rabbit.tcp_listen_options.fd", 
    [{datatype, integer}]}.

{mapping, "tcp_listen_option.high_msgq_watermark", "rabbit.tcp_listen_options.high_msgq_watermark", 
    [{datatype, integer}]}.

{mapping, "tcp_listen_option.high_watermark", "rabbit.tcp_listen_options.high_watermark", 
    [{datatype, integer}]}.

{mapping, "tcp_listen_option.keepalive", "rabbit.tcp_listen_options.keepalive", 
    [{datatype, {enum, [true, false]}}]}.

{mapping, "tcp_listen_option.low_msgq_watermark", "rabbit.tcp_listen_options.low_msgq_watermark", 
    [{datatype, integer}]}.

{mapping, "tcp_listen_option.low_watermark", "rabbit.tcp_listen_options.low_watermark", 
    [{datatype, integer}]}.

{mapping, "tcp_listen_option.port", "rabbit.tcp_listen_options.port", 
    [{datatype, integer}, {validators, ["port"]}]}.

{mapping, "tcp_listen_option.priority", "rabbit.tcp_listen_options.priority", 
    [{datatype, integer}]}.

{mapping, "tcp_listen_option.recbuf", "rabbit.tcp_listen_options.recbuf", 
    [{datatype, integer}]}.

{mapping, "tcp_listen_option.send_timeout", "rabbit.tcp_listen_options.send_timeout", 
    [{datatype, integer}]}.

{mapping, "tcp_listen_option.send_timeout_close", "rabbit.tcp_listen_options.send_timeout_close", 
    [{datatype, {enum, [true, false]}}]}.

{mapping, "tcp_listen_option.sndbuf", "rabbit.tcp_listen_options.sndbuf", 
    [{datatype, integer}]}.

{mapping, "tcp_listen_option.tos", "rabbit.tcp_listen_options.tos", 
    [{datatype, integer}]}.

%% ==========================================================================

%%
%% Resource Limits & Flow Control
%% ==============================
%%
%% See http://www.rabbitmq.com/memory.html for full details.

%% Memory-based Flow Control threshold.
%%
%% {vm_memory_high_watermark, 0.4},

%% Alternatively, we can set a limit (in bytes) of RAM used by the node.
%%
%% {vm_memory_high_watermark, {absolute, 1073741824}},
%%
%% Or you can set absolute value using memory units (with RabbitMQ 3.6.0+).
%%
%% {vm_memory_high_watermark, {absolute, "1024M"}},
%%
%% Supported units suffixes:
%%
%% kb, KB: kibibytes (2^10 bytes)
%% mb, MB: mebibytes (2^20)
%% gb, GB: gibibytes (2^30)

{mapping, "vm_memory_high_watermark.relative", "rabbit.vm_memory_high_watermark", [
    {datatype, float}]}.

{mapping, "vm_memory_high_watermark.absolute", "rabbit.vm_memory_high_watermark", [
    {datatype, [integer, string]}]}.


{translation, "rabbit.vm_memory_high_watermark", 
fun(Conf) ->
    Settings = cuttlefish_variable:filter_by_prefix("vm_memory_high_watermark", Conf),
    Absolute = proplists:get_value(["vm_memory_high_watermark", "absolute"], Settings),
    Relative = proplists:get_value(["vm_memory_high_watermark", "relative"], Settings),
    case {Absolute, Relative} of
        {undefined, undefined} -> cuttlefish:invalid("No vm watermark defined");
        {_,         undefined} -> {absolute, Absolute};
        _                      -> Relative
    end
end}.

%% Fraction of the high watermark limit at which queues start to
%% page message out to disc in order to free up memory.
%%
%% Values greater than 0.9 can be dangerous and should be used carefully.
%%
%% {vm_memory_high_watermark_paging_ratio, 0.5},

{mapping, "vm_memory_high_watermark_paging_ratio", 
          "rabbit.vm_memory_high_watermark_paging_ratio", 
          [{datatype, float}, {validators, ["less_than_1"]}]}.

%% Interval (in milliseconds) at which we perform the check of the memory
%% levels against the watermarks.
%%
%% {memory_monitor_interval, 2500},

{mapping, "memory_monitor_interval", "rabbit.memory_monitor_interval", 
    [{datatype, integer}]}.

%% Set disk free limit (in bytes). Once free disk space reaches this
%% lower bound, a disk alarm will be set - see the documentation
%% listed above for more details.
%%
%% {disk_free_limit, 50000000},
%%
%% Or you can set it using memory units (same as in vm_memory_high_watermark)
%% with RabbitMQ 3.6.0+.
%% {disk_free_limit, "50MB"},
%% {disk_free_limit, "50000kB"},
%% {disk_free_limit, "2GB"},

%% Alternatively, we can set a limit relative to total available RAM.
%%
%% Values lower than 1.0 can be dangerous and should be used carefully.
%% {disk_free_limit, {mem_relative, 2.0}},

{mapping, "disk_free_limit.relative", "rabbit.disk_free_limit", [
    {datatype, float}]}.

{mapping, "disk_free_limit.absolute", "rabbit.disk_free_limit", [
    {datatype, [integer, string]}]}.


{translation, "rabbit.disk_free_limit", 
fun(Conf) ->
    Settings = cuttlefish_variable:filter_by_prefix("disk_free_limit", Conf),
    Absolute = proplists:get_value(["disk_free_limit", "absolute"], Settings),
    Relative = proplists:get_value(["disk_free_limit", "relative"], Settings),
    case {Absolute, Relative} of
        {undefined, undefined} -> cuttlefish:invalid("No disk limit defined");
        {_,         undefined} -> Absolute;
        _                      -> {mem_relative, Relative}
    end
end}.

%%
%% Clustering
%% =====================
%%

%% How to respond to cluster partitions.
%% See http://www.rabbitmq.com/partitions.html for further details.
%%
%% {cluster_partition_handling, ignore},

{mapping, "cluster_partition_handling", "rabbit.cluster_partition_handling", 
    [{datatype, {enum, [ignore, pause_minority, autoheal, pause_if_all_down]}}]}.

{mapping, "cluster_partition_handling.pause_if_all_down.recover", 
          "rabbit.cluster_partition_handling",
          [{datatype, {enum, [ignore, autoheal]}}]}.

{mapping, "cluster_partition_handling.pause_if_all_down.node.$name", 
          "rabbit.cluster_partition_handling",
          [{datatype, atom}]}.

{translation, "rabbit.cluster_partition_handling",
fun(Conf) ->
    case cuttlefish:conf_get("cluster_partition_handling", Conf) of
        pause_if_all_down ->
            PauseIfAllDownNodes = cuttlefish_variable:filter_by_prefix(
                "cluster_partition_handling.pause_if_all_down.node", 
                Conf),
            case PauseIfAllDownNodes of
                [] -> 
                    cuttlefish:invalid("Nodes required for pause_if_all_down");
                _  ->
                    Nodes = [ V || {K,V} <- PauseIfAllDownNodes ],
                    PauseIfAllDownRecover = cuttlefish:conf_get(
                        "cluster_partition_handling.pause_if_all_down.recover",
                        Conf),
                    case PauseIfAllDownRecover of
                        Recover when Recover == ignore; Recover == autoheal ->
                            {pause_if_all_down, Nodes, Recover};
                        Invalid -> 
                            cuttlefish:invalid("Recover strategy required for pause_if_all_down")
                    end
            end;
        Other -> Other
    end
end}.

%% Mirror sync batch size, in messages. Increasing this will speed
%% up syncing but total batch size in bytes must not exceed 2 GiB.
%% Available in RabbitMQ 3.6.0 or later.
%%
%% {mirroring_sync_batch_size, 4096},

{mapping, "mirroring_sync_batch_size", "rabbit.mirroring_sync_batch_size", 
    [{datatype, bytesize}, {validators, ["size_less_than_2G"]}]}.

%% Make clustering happen *automatically* at startup - only applied
%% to nodes that have just been reset or started for the first time.
%% See http://www.rabbitmq.com/clustering.html#auto-config for
%% further details.
%%
%% {cluster_nodes, {['rabbit@my.host.com'], disc}},

{mapping, "cluster_nodes.disc.$node", "rabbit.cluster_nodes", 
    [{datatype, atom}]}.

{mapping, "cluster_nodes.ram.$node", "rabbit.cluster_nodes", 
    [{datatype, atom}]}.

{translation, "rabbit.cluster_nodes",
fun(Conf) ->
    DiskNodes = [ V || {_, V} <- cuttlefish_variable:filter_by_prefix("cluster_nodes.disc", Conf)],
    RamNodes  = [ V || {_, V} <- cuttlefish_variable:filter_by_prefix("cluster_nodes.ram", Conf)],

    case {DiskNodes, RamNodes} of
        {_,  []} -> {DiskNodes, disc};
        {[],  _} -> {RamNodes, ram}
    end
end}.


%% Interval (in milliseconds) at which we send keepalive messages
%% to other cluster members. Note that this is not the same thing
%% as net_ticktime; missed keepalive messages will not cause nodes
%% to be considered down.
%%
%% {cluster_keepalive_interval, 10000},

{mapping, "cluster_keepalive_interval", "rabbit.cluster_keepalive_interval", 
    [{datatype, integer}]}.

%%
%% Statistics Collection
%% =====================
%%

%% Set (internal) statistics collection granularity.
%%
%% {collect_statistics, none},

{mapping, "collect_statistics", "rabbit.collect_statistics", 
    [{datatype, {enum, [none, coarse, fine]}}]}.

%% Statistics collection interval (in milliseconds). Increasing
%% this will reduce the load on management database.
%%
%% {collect_statistics_interval, 5000},

{mapping, "collect_statistics_interval", "rabbit.collect_statistics_interval",
    [{datatype, integer}]}.

%%
%% Misc/Advanced Options
%% =====================
%%
%% NB: Change these only if you understand what you are doing!
%%

%% Explicitly enable/disable hipe compilation.
%%
%% {hipe_compile, true},

{mapping, "hipe_compile", "rabbit.hipe_compile", 
    [{datatype, {enum, [true, false]}}]}.

%% Timeout used when waiting for Mnesia tables in a cluster to
%% become available.
%%
%% {mnesia_table_loading_timeout, 30000},

{mapping, "mnesia_table_loading_timeout", "rabbit.mnesia_table_loading_timeout",
    [{datatype, integer}]}.

%% Size in bytes below which to embed messages in the queue index. See
%% http://www.rabbitmq.com/persistence-conf.html
%%
%% {queue_index_embed_msgs_below, 4096}

{mapping, "queue_index_embed_msgs_below", "rabbit.queue_index_embed_msgs_below",
    [{datatype, bytesize}]}.

%% ----------------------------------------------------------------------------
%% Advanced Erlang Networking/Clustering Options.
%%
%% See http://www.rabbitmq.com/clustering.html for details
%% ----------------------------------------------------------------------------
%% Sets the net_kernel tick time.
%% Please see http://erlang.org/doc/man/kernel_app.html and
%% http://www.rabbitmq.com/nettick.html for further details.
%%
%% {kernel, [{net_ticktime, 60}]},
{mapping, "kernel.net_ticktime", "kernel.net_ticktime", 
    [{datatype, integer}]}.

%% ----------------------------------------------------------------------------
%% RabbitMQ AMQP 1.0 Support
%%
%% See https://github.com/rabbitmq/rabbitmq-amqp1.0/blob/stable/README.md
%% for details
%% ----------------------------------------------------------------------------

%  {rabbitmq_amqp1_0,[
%% Connections that are not authenticated with SASL will connect as this
%% account. See the README for more information.
%%
%% Please note that setting this will allow clients to connect without
%% authenticating!
%%
%% {default_user, "guest"},
{mapping, "amqp1_0.default_user", "rabbitmq_amqp1_0.default_user", 
    [{datatype, string}]}.
%% Enable protocol strict mode. See the README for more information.
%%
%% {protocol_strict_mode, false}
%   ]},
{mapping, "amqp1_0.protocol_strict_mode", "rabbitmq_amqp1_0.protocol_strict_mode", 
    [{datatype, {enum, [true, false]}}]}.


% ==========================
% Lager section
% ==========================

{mapping, "log.dir", "lager.log_root", [
    {datatype, string},
    {validators, ["dir_writable"]}]}.

{mapping, "log.console", "lager.handlers", [
    {datatype, {enum, [true, false]}}
]}.

{mapping, "log.syslog", "lager.handlers", [
    {datatype, {enum, [true, false]}}
]}.
{mapping, "log.file", "lager.handlers", [
    {datatype, [{enum, [false]}, string]}
]}.

{mapping, "log.file.level", "lager.handlers", [
    {datatype, {enum, [debug, info, warning, error]}}
]}.
{mapping, "log.$handler.level", "lager.handlers", [
    {datatype, {enum, [debug, info, warning, error]}}
]}.
{mapping, "log.file.rotation.date", "lager.handlers", [
    {datatype, string}
]}.
{mapping, "log.file.rotation.size", "lager.handlers", [
    {datatype, integer}
]}.
{mapping, "log.file.rotation.count", "lager.handlers", [
    {datatype, integer}
]}.

{mapping, "log.syslog.identity", "lager.handlers", [
    {datatype, string}
]}.
{mapping, "log.syslog.facility", "lager.handlers", [
    {datatype, atom}
]}.

{translation, "lager.handlers",
fun(Conf) ->
    ConsoleHandler = case cuttlefish:conf_get("log.console", Conf, false) of
        true  ->
            ConsoleLevel = cuttlefish:conf_get("log.console.level", Conf, info),
            [{lager_console_backend, ConsoleLevel}];
        false -> []
    end,
    FileHandler = case cuttlefish:conf_get("log.file", Conf, false) of
        false -> [];
        File  -> 
            FileLevel = cuttlefish:conf_get("log.file.level", Conf, info),
            RotationDate  = cuttlefish:conf_get("log.file.rotation.date", Conf, ""),
            RotationSize  = cuttlefish:conf_get("log.file.rotation.size", Conf, 0),
            RotationCount = cuttlefish:conf_get("log.file.rotation.count", Conf, 10),
            [{lager_file_backend, [{file, File}, 
                                   {level, FileLevel}, 
                                   {date, RotationDate}, 
                                   {size, RotationSize}, 
                                   {count, RotationCount}]}]
    end,
    SyslogHandler = case cuttlefish:conf_get("log.syslog", Conf, false) of
        false -> [];
        true  ->
            SyslogLevel = cuttlefish:conf_get("log.syslog.level", Conf, info),
            Identity = cuttlefish:conf_get("log.syslog.identity", Conf),
            Facility = cuttlefish:conf_get("log.syslog.facility", Conf),
            [{lager_syslog_backend, [Identity, Facility, SyslogLevel]}]
    end,
    case ConsoleHandler ++ FileHandler ++ SyslogHandler of
        []    -> undefined;
        Other -> Other
    end
end}.


% ===============================
% Validators
% ===============================

{validator, "size_less_than_2G", "Byte size should be less than 2G and greater than 0",
fun(Size) when is_integer(Size) ->
    Size > 0 andalso Size < 2147483648
end}.

{validator, "less_than_1", "Flooat is not beetween 0 and 1",
fun(Float) when is_float(Float) ->
    Float > 0 andalso Float < 1
end}.

{validator, "port", "Invalid port number",
fun(Port) when is_integer(Port) ->
    Port > 0 andalso Port < 65535
end}.

{validator, "byte", "Integer is not 0<i<255",
fun(Int) when is_integer(Int) ->
    Int > 0 andalso Int < 255
end}.

{validator, "dir_writable", "Cannot create file in dir",
fun(Dir) ->
    TestFile = filename:join(Dir, "test_file"),
    file:delete(TestFile),
    Res = ok == file:write_file(TestFile, <<"test">>),
    file:delete(TestFile),
    Res
end}.

{validator, "file_accessible", "file doesnt exist",
fun(File) ->
    ReadFile = file:read_file_info(File),
    element(1, ReadFile) == ok
end}.