teacup_nats

% Copyright (c) 2016, Yuce Tekol <yucetekol@gmail.com>.
% All rights reserved.
%
% Redistribution and use in source and binary forms, with or without
% modification, are permitted provided that the following conditions are
% met:
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% * Redistributions of source code must retain the above copyright
%   notice, this list of conditions and the following disclaimer.
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% * Redistributions in binary form must reproduce the above copyright
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% * The names of its contributors may not be used to endorse or promote
%   products derived from this software without specific prior written
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-module(tcnats).

-export([new/0,
         new/1]).
-export([connect/0,
         connect/2,
         connect/3,
         pub/2,
         pub/3,
         sub/2,
         sub/3,
         unsub/2,
         unsub/3]).

-include("teacup_nats_common.hrl").

-define(DEFAULT_HOST, <<"127.0.0.1">>).
-define(DEFAULT_PORT, 4222).

%% == API

new() ->
    new(#{}).
 
new(Opts) ->
    teacup:new(?HANDLER, Opts).

connect() ->
    connect(?DEFAULT_HOST, ?DEFAULT_PORT, #{}).
    
connect(Host, Port) ->
    connect(Host, Port, #{}).
    
connect(Host, Port, #{verbose := true} = Opts) ->
    {ok, Conn} = teacup:new(?HANDLER, Opts),
    case teacup:call(Conn, {connect, Host, Port}) of
        ok ->
            {ok, Conn};
        {error, _Reason} = Error ->
            Error
    end;
  
connect(Host, Port, Opts) ->
    {ok, Conn} = teacup:new(?HANDLER, Opts),
    teacup:connect(Conn, Host, Port),
    {ok, Conn}.
    
pub(Ref, Subject) ->
    pub(Ref, Subject, #{}).

-spec pub(Ref :: teacup:teacup_ref(), Subject :: binary(), Opts :: map()) ->
    ok | {error, Reason :: term()}.

pub({teacup@ref, ?VERBOSE_SIGNATURE, _} = Ref, Subject, Opts) ->
    teacup:call(Ref, {pub, Subject, Opts});    

pub({teacup@ref, ?SIGNATURE, _} = Ref, Subject, Opts) ->
    teacup:cast(Ref, {pub, Subject, Opts}).                        

sub(Ref, Subject) ->
    sub(Ref, Subject, #{}).

-spec sub(Ref :: teacup:teacup_ref(), Subject :: binary(), Opts :: map()) ->
    ok | {error, Reason :: term()}.

sub({teacup@ref, ?VERBOSE_SIGNATURE, _} = Ref, Subject, Opts) ->
    teacup:call(Ref, {sub, Subject, Opts, self()});

sub({teacup@ref, ?SIGNATURE, _} = Ref, Subject, Opts) ->
    teacup:cast(Ref, {sub, Subject, Opts, self()}).    

unsub(Ref, Subject) ->
    unsub(Ref, Subject, #{}).

-spec unsub(Ref :: teacup:teacup_ref(), Subject :: binary(), Opts :: map()) ->
    ok | {error, Reason :: term()}.

unsub({teacup@ref, ?VERBOSE_SIGNATURE, _} = Ref, Subject, Opts) ->
    teacup:call(Ref, {unsub, Subject, Opts, self()});

unsub({teacup@ref, ?SIGNATURE, _} = Ref, Subject, Opts) ->
    teacup:cast(Ref, {unsub, Subject, Opts, self()}).

% new() ->
%     new(#{}).
 
% new(Opts) ->
%     teacup:new(?SIGNATURE, Opts).

% connect() ->
%     connect(?DEFAULT_HOST, ?DEFAULT_PORT, #{}).
    
% connect(Host, Port) ->
%     connect(Host, Port, #{}).
    
% connect(Host, Port, Opts) ->    
%     NewOpts = Opts#{verbose => true},
%     {ok, Conn} = teacup:new(?SIGNATURE, NewOpts),
%     case teacup:call(Conn, {connect, Host, Port}) of
%         ok ->
%             {ok, Conn};
%         {error, _Reason} = Error ->
%             Error
%     end.

% pub(Ref, Subject) ->
%     pub(Ref, Subject, #{}).
    
% -spec pub(Ref :: teacup:teacup_ref(), Subject :: binary(), Opts :: map()) ->
%     ok | {error, Reason :: term()}.
% pub(Ref, Subject, Opts) ->
%     teacup:call(Ref, {pub, Subject, Opts}).

% sub(Ref, Subject) ->
%     sub(Ref, Subject, #{}).

% -spec sub(Ref :: teacup:teacup_ref(), Subject :: binary(), Opts :: map()) ->
%     ok | {error, Reason :: term()}.
% sub(Ref, Subject, Opts) ->
%     teacup:call(Ref, {sub, Subject, Opts, self()}).    

% unsub(Ref, Subject) ->
%     unsub(Ref, Subject, #{}).

% -spec unsub(Ref :: teacup:teacup_ref(), Subject :: binary(), Opts :: map()) ->
%     ok | {error, Reason :: term()}.
% unsub(Ref, Subject, Opts) ->
%     teacup:call(Ref, {unsub, Subject, Opts, self()}).