// Copyright 2008, Google Inc.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//  1. Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//  2. Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//  3. Neither the name of Google Inc. nor the names of its contributors may be
//     used to endorse or promote products derived from this software without
//     specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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#ifdef OFFICIAL_BUILD
// The Geolocation API has not been finalized for official builds.
#else

#if defined(WIN32) || defined(WINCE)

#include "gears/geolocation/wifi_data_provider_windows_common.h"

#include "gears/geolocation/device_data_provider.h"

std::string16 MacAddressAsString16(const UCHAR mac_as_int[6]) {
  char16 mac[18];  // Format is XX-XX-XX-XX-XX-XX.
  // mac_as_int is big-endian. Write in byte chunks.
#ifdef DEBUG
  int num_characters =
#endif
      wsprintf(mac, STRING16(L"%02x-%02x-%02x-%02x-%02x-%02x"), mac_as_int[0],
               mac_as_int[1], mac_as_int[2], mac_as_int[3], mac_as_int[4],
               mac_as_int[5]);
  assert(num_characters == 17);
  return mac;
}

bool ConvertToGearsFormat(const NDIS_WLAN_BSSID &data,
                          AccessPointData *access_point_data) {
  assert(access_point_data);
  access_point_data->mac_address = MacAddressAsString16(data.MacAddress);
  access_point_data->radio_signal_strength = data.Rssi;
  // It appears that we can not get the age of the scan. The only way to get
  // this information would be to perform the scan ourselves, which is not
  // possible.
  return true;
}

int GetDataFromBssIdList(const NDIS_802_11_BSSID_LIST &bss_id_list,
                         int list_size,
                         std::vector<AccessPointData> *data) {
  // Walk through the BSS IDs.
  int found = 0;
  const uint8 *iterator = reinterpret_cast<const uint8*>(&bss_id_list.Bssid[0]);
  const uint8 *end_of_buffer =
      reinterpret_cast<const uint8*>(&bss_id_list) + list_size;
  for (int i = 0; i < static_cast<int>(bss_id_list.NumberOfItems); ++i) {
    const NDIS_WLAN_BSSID *bss_id =
        reinterpret_cast<const NDIS_WLAN_BSSID*>(iterator);
    // Check that the length of this BSS ID is reasonable.
    if (bss_id->Length < sizeof(NDIS_WLAN_BSSID) ||
        iterator + bss_id->Length > end_of_buffer) {
      break;
    }
    AccessPointData access_point_data;
    if (ConvertToGearsFormat(*bss_id, &access_point_data)) {
      data->push_back(access_point_data);
      ++found;
    }
    // Move to the next BSS ID.
    iterator += bss_id->Length;
  }
  return found;
}

#endif  // WIN32 || WINCE

#endif  // OFFICIAL_BUILD