/* telepathy-gruschler - A Telepathy connection manager for social networks.
 * Copyright (C) 2009  Mathias Hasselmann
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include "config.h"

#include <rest/rest-xml-parser.h>
#include <rest-extras/facebook-proxy.h>
#include <libsoup/soup.h>
#include <locale.h>
#include <string.h>

static RestXmlNode *
get_xml (RestProxyCall *call)
{
  static RestXmlParser *parser = NULL;
  RestXmlNode          *root, *node;

  if (parser == NULL)
    parser = rest_xml_parser_new ();

  root = rest_xml_parser_parse_from_data (parser,
                                          rest_proxy_call_get_payload (call),
                                          rest_proxy_call_get_payload_length (call));

  if (!g_strcmp0 (root->name, "error_response"))
    {
      node = rest_xml_node_find (root, "error_msg");
      g_error ("Error from facebook: %s", node->content);
    }

  g_object_unref (call);

  return root;
}

static void
facebook_proxy_login (RestProxy  *proxy,
                      const char *token,
                      const char *email,
                      const char *pass)
{
  char *url;

  url = facebook_proxy_build_login_url (FACEBOOK_PROXY (proxy), token);

  g_print ("login URL: %s\n", url);

  SoupSession *session;
  SoupMessage *msg;

  session = soup_session_sync_new_with_options (SOUP_SESSION_USER_AGENT, "Firefox/3.0 ",
                                                SOUP_SESSION_ADD_FEATURE, soup_cookie_jar_new (),
                                                NULL);

  msg = soup_message_new (SOUP_METHOD_GET, url);
  soup_session_send_message (session, msg);

  GMatchInfo *info, *info_params;
  GRegex *regex, *re_parms;
  const char *s;
  int start, end;

  g_free (url);
  url = NULL;

  regex = g_regex_new ("<form.*?action=\"(.*?)\".*?>(.*?)</form>",
                       G_REGEX_CASELESS | G_REGEX_DOTALL, 0, NULL);

  if (g_regex_match_full (regex, msg->response_body->data,
                          msg->response_body->length, 0,
                          0, &info, NULL))
    {
      url = g_match_info_fetch (info, 1);
      g_match_info_fetch_pos (info, 2, &start, &end);
    }

  g_match_info_free (info);
  g_regex_unref (regex);

  regex = g_regex_new ("<input\\s+(.*?)>", G_REGEX_CASELESS | G_REGEX_DOTALL, 0, NULL);
  re_parms = g_regex_new ("\\b(\\S+?)=\"(.*?)\"", G_REGEX_CASELESS | G_REGEX_DOTALL, 0, NULL);

  GHashTable *params = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);

  if (g_regex_match_full (regex, s = msg->response_body->data + start, end - start, 0, 0, &info, NULL))
    {
      do
        {
          char *name = NULL, *value = NULL;

          g_match_info_fetch_pos (info, 1, &start, &end);

          if (g_regex_match_full (re_parms, s + start, end - start, 0, 0, &info_params, NULL))
            {
              do
                {
                  char *param = g_match_info_fetch (info_params, 1);

                  if (!g_strcmp0 (param, "name"))
                    name = g_match_info_fetch (info_params, 2);
                  else if (!g_strcmp0 (param, "value"))
                    value = g_match_info_fetch (info_params, 2);

                  g_free (param);
                }
              while (g_match_info_next (info_params, NULL));
            }

          if (name && value)
            {
              if (!g_strcmp0 (name, "charset_test"))
                {
                  g_free (value);
                  g_free (name);
                  continue;
                }

              if (!g_strcmp0 (name, "email"))
                {
                  g_free (value);
                  value = g_strdup (email);
                }
              else if (!g_strcmp0 (name, "pass"))
                {
                  g_free (value);
                  value = g_strdup (pass);
                }

              g_hash_table_insert (params, name, value);
            }
        }
      while (g_match_info_next (info, NULL));
    }

  g_match_info_free (info);
  g_regex_unref (regex);
  g_object_unref (msg);

  char *form = soup_form_encode_hash (params);

  msg = soup_message_new (SOUP_METHOD_POST, url);
  soup_message_set_request (msg, "application/x-www-form-urlencoded",
                            SOUP_MEMORY_TAKE, form, strlen (form));
  soup_session_send_message (session, msg);

  g_file_set_contents ("blub.html", msg->response_body->data, msg->response_body->length, NULL);

  g_object_unref (msg);
  g_object_unref (session);
}

static char **
facebook_proxy_friends_get (RestProxy *proxy)
{
  GError        *error = NULL;
  RestXmlNode   *root, *node;
  RestProxyCall *call;
  GPtrArray     *uids;

  call = rest_proxy_new_call (proxy);
  rest_proxy_call_set_function (call, "friends.get");

  if (!rest_proxy_call_run (call, NULL, &error))
    g_error ("Cannot get friends: %s", error->message);

  root = get_xml (call);
  node = rest_xml_node_find (root, "uid");
  uids = g_ptr_array_new ();

  while (node)
    {
      if (!g_strcmp0 ("uid", node->name))
        g_ptr_array_add (uids, g_strdup (node->content));

      node = node->next;
    }

  rest_xml_node_unref (root);
  g_ptr_array_add (uids, NULL);

  return (char **) g_ptr_array_free (uids, FALSE);
}

int
main (int    argc,
      char **argv)
{
  GError        *error = NULL;
  RestProxyCall *call;
  RestProxy     *proxy;
  RestXmlNode   *root;

  char          *token, *session_key, *secret, *uid;

  setlocale (LC_ALL, "");
  g_thread_init (NULL);
  g_type_init ();

  proxy = facebook_proxy_new (GRUSCHLER_FACEBOOK_APIKEY,
                              GRUSCHLER_FACEBOOK_SECRET);

  call = rest_proxy_new_call (proxy);
  rest_proxy_call_set_function (call, "auth.createToken");

  if (!rest_proxy_call_run (call, NULL, &error))
    g_error ("cannot get token: %s", error->message);

  root = get_xml (call);

  if (g_strcmp0 (root->name, "auth_createToken_response"))
    g_error ("Unexpected response to auto.createToken");

  token = g_strdup (root->content);
  rest_xml_node_unref (root);

  g_print ("token: %s\n", token);

  facebook_proxy_login (proxy, token,
                        GRUSCHLER_FACEBOOK_DEFAULT_EMAIL,
                        GRUSCHLER_FACEBOOK_DEFAULT_PASSWORD);

  call = rest_proxy_new_call (proxy);
  rest_proxy_call_set_function (call, "auth.getSession");
  rest_proxy_call_add_param (call, "auth_token", token);

  if (!rest_proxy_call_run (call, NULL, &error))
    g_error ("Cannot get session: %s", error->message);

  root = get_xml (call);

  session_key = rest_xml_node_find (root, "session_key")->content;
  secret = rest_xml_node_find (root, "secret")->content;
  uid = rest_xml_node_find (root, "uid")->content;

  g_print ("Got new secret %s and session key %s for %s\n", secret, session_key, uid);

  facebook_proxy_set_session_key (FACEBOOK_PROXY (proxy), session_key);
  facebook_proxy_set_app_secret (FACEBOOK_PROXY (proxy), secret);

  rest_xml_node_unref (root);

  char **uids = facebook_proxy_friends_get (proxy);

  call = rest_proxy_new_call (proxy);
  rest_proxy_call_set_function (call, "users.getInfo");
  rest_proxy_call_add_param (call, "uids", g_strjoinv (",", uids));
  rest_proxy_call_add_param (call, "fields", "uid,about_me,birthday_date,current_location,first_name,hometown_location,last_name,name,pic,profile_update_time,profile_url,sex,status,username,website");
  rest_proxy_call_add_param (call, "locale", "en_US");

  if (!rest_proxy_call_run (call, NULL, &error))
    g_error ("Cannot get user info: %s", error->message);

  root = get_xml (call);

  RestXmlNode *user, *detail;

  for (user = rest_xml_node_find (root, "user"); user; user = user->next)
    {
      if (g_strcmp0 ("user", user->name))
        continue;

      GHashTableIter iter;

      g_print ("---\n");

      g_hash_table_iter_init (&iter, user->children);
      while (g_hash_table_iter_next (&iter, NULL, (gpointer) &detail))
        {
          g_print ("  %s: %s\n", detail->name, detail->content);
        }
    }

  g_strfreev (uids);

  g_object_unref (proxy);
/*
fql.multiquery
queries=
  {
"friends": "SELECT uid2 FROM friend WHERE uid1=667897485",
"profiles": "SELECT uid, name, profile_update_time FROM user WHERE profile_update_time > 0 AND uid IN (SELECT uid2 FROM friend WHERE uid1=667897485)"
}
*/
  return 0;
}