-module(ftpasta_ffi).

-import(ftpasta_ffi_helpers, [str_to_charlist/1, charlist_to_str/1, normalise/1, normalise_charlist/1]).

-export([
    append/3, append_bin/3, cd/2, close/1, delete/2, formaterror/1,
    lcd/2, lpwd/1, ls/2, mkdir/2, nlist/2, open/4, pwd/1,
    recv/3, recv_bin/2, rename/3, rmdir/2, send/3, send_bin/3, user/3
]).


append(Pid, LocalFileName, RemoteFileName) -> normalise(ftp:append(Pid, str_to_charlist(LocalFileName), str_to_charlist(RemoteFileName))).

append_bin(Pid, Bin, RemoteFileName) -> normalise(ftp:append_bin(Pid, Bin, str_to_charlist(RemoteFileName))).

cd(Pid, Dir) -> normalise(ftp:cd(Pid, str_to_charlist(Dir))).

close(Pid) -> ftp:close(Pid), nil.

delete(Pid, File) -> normalise(ftp:delete(Pid, str_to_charlist(File))).

formaterror(Reason) -> charlist_to_str(ftp:formaterror({error, Reason})).

lcd(Pid, Dir) -> normalise(ftp:lcd(Pid, str_to_charlist(Dir))).

lpwd(Pid) -> {_, Dir} = ftp:lpwd(Pid), charlist_to_str(Dir).

ls(Pid, Dir) -> normalise_charlist(ftp:ls(Pid, str_to_charlist(Dir))).

mkdir(Pid, Dir) -> normalise(ftp:mkdir(Pid, str_to_charlist(Dir))).

nlist(Pid, Dir) -> normalise_charlist(ftp:nlist(Pid, str_to_charlist(Dir))).

tls_config(true) -> [
    {cacerts, public_key:cacerts_get()},
    {log_level, none},
    {server_name_indication, disable},  % FIXME: SNI always fails?
    {session_tickets, auto},
    {verify, verify_peer}
];
tls_config(false) -> [
    {log_level, none},
    {server_name_indication, disable},  % FIXME: SNI always fails?
    {session_tickets, auto},
    {verify, verify_none}
].

ftp_config(Port, explicit, Verify) -> [
    {port, Port},
    {tls_ctrl_session_reuse, true},
    {tls_sec_method, ftpes},
    {tls, tls_config(Verify)}
];
ftp_config(Port, implicit, Verify) -> [
    {port, Port},
    {tls_ctrl_session_reuse, true},
    {tls_sec_method, ftps},
    {tls, tls_config(Verify)}
];
ftp_config(Port, plaintext, _) -> [{port, Port}].

open(Host, Port, TLS, Cert) -> ftp:open(str_to_charlist(Host), ftp_config(Port, TLS, Cert)).

pwd(Pid) -> normalise_charlist(ftp:pwd(Pid)).

recv(Pid, RemoteFileName, LocalFileName) -> normalise(ftp:recv(Pid, str_to_charlist(RemoteFileName), str_to_charlist(LocalFileName))).

recv_bin(Pid, RemoteFileName) -> ftp:recv_bin(Pid, str_to_charlist(RemoteFileName)).

rename(Pid, Old, New) -> normalise(ftp:rename(Pid, str_to_charlist(Old), str_to_charlist(New))).

rmdir(Pid, Dir) -> normalise(ftp:rmdir(Pid, str_to_charlist(Dir))).

send(Pid, LocalFileName, RemoteFileName) -> normalise(ftp:send(Pid, str_to_charlist(LocalFileName), str_to_charlist(RemoteFileName))).

send_bin(Pid, Bin, RemoteFileName) -> normalise(ftp:send_bin(Pid, Bin, str_to_charlist(RemoteFileName))).

user(Pid, User, Pass) -> normalise(ftp:user(Pid, str_to_charlist(User), str_to_charlist(Pass))).