% Copyright (c) 2016, Yuce Tekol <yucetekol@gmail.com>.
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-module(tcp@teacup).
-behaviour(teacup_transport).

-export([connect/4,
         close/1,
         send/2,
         raw_socket/1, 
         loop/1]).

-define(SOCKET(Socket), {?MODULE, Socket}).

%% == Callbacks

connect(Host, Port, Opts, undefined) ->
    connect(Host, Port, Opts, 5000);

connect(Host, Port, Opts, Timeout) ->
    case gen_tcp:connect(Host, Port, Opts, Timeout) of
        {ok, Socket} -> {ok, ?SOCKET(Socket)};
        Other -> Other
    end.
    
close(?SOCKET(Socket)) ->
    gen_tcp:close(Socket).
    
send(?SOCKET(Socket), Bin) ->
    gen_tcp:send(Socket, Bin).
    
raw_socket(?SOCKET(Socket)) ->
    Socket.    

loop(Parent) ->
    receive
        {tcp, Socket, Data} ->
            Parent ! {transport_data, ?SOCKET(Socket), Data},
            loop(Parent);
        {tcp_closed, Socket} ->
            Parent ! {transport_closed, ?SOCKET(Socket)};
        stop ->
            ok
    end.