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(* Copyright (c) 2010-2011 Yoran Heling
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *)

(* global useful functions *)
let config_dir create =
  let confdir = Filename.concat (Glib.get_user_config_dir ()) "Serika" in
  if create then (
    try
      Unix.mkdir confdir 0o700
    with Unix.Unix_error (Unix.EEXIST, _, _) -> ()
  );
  confdir



(* init GTK and create objects *)
let _ = GtkMain.Main.init ()
let win = new Gui.mainwin ()
let _ = win#show
let api = new VndbApi.connection
  (fun sock read cb ->
    ignore (GMain.Io.add_watch ~cond:[if read then `IN else `OUT]
      ~callback:(fun _ -> cb (); false) (Glib.Io.channel_of_descr sock)))
  (fun sec cb -> win#set_throttled (sec+5) cb)


(* global API callbacks *)
let _ =
  api#set_linefunc (Some (fun sent str ->
    win#add_debuglog (if sent then `write else `read)
      (Str.replace_first (Str.regexp "\\(\"password\"[\r\n\t ]*:[\r\n\t ]*\"\\)[^\"]+\"") "\\1<secret>\"" str);
    win#add_bandwidth ((String.length str)+1);
    if not sent then win#incr_cmd_count
  ));
  api#set_disconnectfunc (Some win#set_loggedout)


(* global gui callbacks *)
let _ =
  win#set_on_disconnect (fun () -> api#disconnect)


(* login functions and callbacks *)

let login_read () =
  let fn = Filename.concat (config_dir false) "login.json" in
  let fd = open_in fn in
  let obj = Json.json_of_channel fd in
  close_in_noerr fd;
  win#login#set_defaults (
    Json.get_bool   (Json.get_value obj "anonymous"),
    Json.get_string (Json.get_value obj "username"),
    Json.get_string (Json.get_value obj "password"),
    Json.get_string (Json.get_value obj "server"),
    int_of_string (Json.get_int (Json.get_value obj "port")),
    Json.get_bool   (Json.get_value obj "remember"),
    Json.get_bool   (Json.get_value obj "autoconnect")
  )

let login_write anon user pass serv port remem auto =
  let fn = Filename.concat (config_dir true) "login.json" in
  if remem then (
    let obj = Json.Object [
      ("anonymous",   Json.Bool anon);
      ("username",    Json.String user);
      ("password",    Json.String (if anon || not auto then "" else pass));
      ("server",      Json.String serv);
      ("port",        Json.Int (string_of_int port));
      ("remember",    Json.Bool remem);
      ("autoconnect", Json.Bool auto)
    ] in
    let fd = open_out fn in
    output_string fd (Json.string_of_json obj);
    close_out_noerr fd;
    Unix.chmod fn 0o600
  ) else
    Unix.unlink fn

let _ =
  (try login_read () with _ -> ());
  win#login#apply_defaults;
  win#login#set_on_connect (fun (anon, user, pass, serv, port, remem, auto) ->
    (try login_write anon user pass serv port remem auto with _ -> ());
    api#set_host serv;
    api#set_port port;
    api#connect (fun ip port ->
      win#add_debuglog `status ("Connected to " ^ (Unix.string_of_inet_addr ip) ^ ":" ^ (string_of_int port));
      win#login#set_connected;
      let u = if anon = true then VndbApi.Anonymous else VndbApi.User (user, pass) in
      let du = if anon = true then "Anon" else user in
      api#login u (fun r ->
        match r with
        | VndbApi.ROK -> win#set_loggedin du
        | VndbApi.RError ("auth", msg, _) ->
          win#login#failed ("Login failed: "^msg);
          api#disconnect
        | _ ->
          win#login#failed "Login failed for some odd reason. :(";
          api#disconnect
      )
    ) (fun _ _ msg -> win#login#failed ("Connection failed: "^msg))
  );
  win#login#do_connect



(* running custom commands *)
let _ =
  win#set_on_debug_cmd (fun str ->
    win#statusmsg "Executing custom command...";
    api#addcmd str (fun r ->
      win#statusmsg "Custom command finished.";
      match r with
      | VndbApi.RError _ ->
        win#add_debuglog `status ("Server replied with an error. You may want "^
        "to check http://vndb.org/d11 for information on the available commands "^
        "and error messages.")
      | _ -> ()
    )
  )



(* enter the mainloop *)
let _ = GMain.Main.main ()






(* blocking pollfunc, useful for testing the vndbApi outside of GTK *
let pollfunc sock read cb =
  let _,_,_ = Unix.select
    (if read then [sock] else [])
    (if read then [] else [sock])
    [] (-.1.0) in
  cb ();;
*)