/*
 * Copyright (C) OpenTX
 *
 * Based on code named
 *   th9x - http://code.google.com/p/th9x
 *   er9x - http://code.google.com/p/er9x
 *   gruvin9x - http://code.google.com/p/gruvin9x
 *
 * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * 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.
 */

#include "io/frsky_firmware_update.h"
#include "io/multi_firmware_update.h"
#include "opentx.h"
#include "storage/modelslist.h"

#define NODE_TYPE(fname)       fname[SD_SCREEN_FILE_LENGTH+1]
#define IS_DIRECTORY(fname)    ((bool)(!NODE_TYPE(fname)))
#define IS_FILE(fname)         ((bool)(NODE_TYPE(fname)))

int currentBitmapIndex = 0;
BitmapBuffer * currentBitmap = nullptr;

inline void REFRESH_FILES()
{
  reusableBuffer.sdManager.offset = 65535;
  currentBitmapIndex = -1;
}

bool menuRadioSdManagerInfo(event_t event)
{
  SIMPLE_SUBMENU(STR_SD_INFO_TITLE, ICON_RADIO_SD_MANAGER, 1);

  lcdDrawText(MENUS_MARGIN_LEFT, 2*FH, STR_SD_TYPE);
  lcdDrawText(100, 2*FH, SD_IS_HC() ? STR_SDHC_CARD : STR_SD_CARD);

  lcdDrawText(MENUS_MARGIN_LEFT, 3*FH, STR_SD_SIZE);
  lcdDrawNumber(100, 3*FH, sdGetSize(), LEFT, 0, NULL, "M");

  lcdDrawText(MENUS_MARGIN_LEFT, 4*FH, STR_SD_SECTORS);
#if defined(SD_GET_FREE_BLOCKNR)
  lcdDrawNumber(100, 4*FH, SD_GET_FREE_BLOCKNR()/1000, LEFT, 0, NULL, "/");
  lcdDrawNumber(150, 4*FH, sdGetNoSectors()/1000, LEFT);
#else
  lcdDrawNumber(100, 4*FH, sdGetNoSectors()/1000, LEFT, 0, NULL, "k");
#endif

  lcdDrawText(MENUS_MARGIN_LEFT, 5*FH, STR_SD_SPEED);
  lcdDrawNumber(100, 5*FH, SD_GET_SPEED()/1000, LEFT, 0, NULL, "kb/s");

  return true;
}

inline bool isFilenameGreater(bool isfile, const char * fn, const char * line)
{
  return (isfile && IS_DIRECTORY(line)) || (isfile==IS_FILE(line) && strcasecmp(fn, line) > 0);
}

inline bool isFilenameLower(bool isfile, const char * fn, const char * line)
{
  return (!isfile && IS_FILE(line)) || (isfile==IS_FILE(line) && strcasecmp(fn, line) < 0);
}

void getSelectionFullPath(char * lfn)
{
  f_getcwd(lfn, _MAX_LFN);
  strcat(lfn, "/");
  strcat(lfn, reusableBuffer.sdManager.lines[menuVerticalPosition - menuVerticalOffset]);
}

void onSdFormatConfirm(const char * result)
{
  if (result == STR_OK) {
    showMessageBox(STR_FORMATTING);
    logsClose();
    audioQueue.stopSD();
    if(sdCardFormat()) {
      f_chdir("/");
      REFRESH_FILES();
    }
  }
}

#if defined(PXX2)
void onUpdateConfirmation(const char * result)
{
  if (result == STR_OK) {
    OtaUpdateInformation * destination = moduleState[reusableBuffer.sdManager.otaUpdateInformation.module].otaUpdateInformation;
    Pxx2OtaUpdate otaUpdate(reusableBuffer.sdManager.otaUpdateInformation.module, destination->candidateReceiversNames[destination->selectedReceiverIndex]);
    otaUpdate.flashFirmware(destination->filename);
    putEvent(EVT_REFRESH);
  }
  else {
    moduleState[reusableBuffer.sdManager.otaUpdateInformation.module].mode = MODULE_MODE_NORMAL;
  }
}

void onUpdateStateChanged()
{
  if (reusableBuffer.sdManager.otaUpdateInformation.step == BIND_INFO_REQUEST) {
    uint8_t modelId = reusableBuffer.sdManager.otaUpdateInformation.receiverInformation.modelID;
    if (modelId > 0 && modelId < DIM(PXX2ReceiversNames)) {
      if (isPXX2ReceiverOptionAvailable(modelId, RECEIVER_OPTION_OTA)) {
        POPUP_CONFIRMATION(getPXX2ReceiverName(modelId), onUpdateConfirmation);
        char *tmp = strAppend(reusableBuffer.sdManager.otaReceiverVersion, TR_CURRENT_VERSION);
        tmp = strAppendUnsigned(tmp, 1 + reusableBuffer.sdManager.otaUpdateInformation.receiverInformation.swVersion.major);
        *tmp++ = '.';
        tmp = strAppendUnsigned(tmp, reusableBuffer.sdManager.otaUpdateInformation.receiverInformation.swVersion.minor);
        *tmp++ = '.';
        tmp = strAppendUnsigned(tmp, reusableBuffer.sdManager.otaUpdateInformation.receiverInformation.swVersion.revision);
        SET_WARNING_INFO(reusableBuffer.sdManager.otaReceiverVersion, tmp - reusableBuffer.sdManager.otaReceiverVersion, 0);
      }
      else {
        POPUP_WARNING(STR_OTA_UPDATE_ERROR);
        SET_WARNING_INFO(STR_UNSUPPORTED_RX, sizeof(TR_UNSUPPORTED_RX) - 1, 0);
        moduleState[reusableBuffer.sdManager.otaUpdateInformation.module].mode = MODULE_MODE_NORMAL;
      }
    }
    else {
      POPUP_WARNING(STR_OTA_UPDATE_ERROR);
      SET_WARNING_INFO(STR_UNKNOWN_RX, sizeof(TR_UNKNOWN_RX) - 1, 0);
      moduleState[reusableBuffer.sdManager.otaUpdateInformation.module].mode = MODULE_MODE_NORMAL;
    }
  }
}
#endif

void onSdManagerMenu(const char * result)
{
  TCHAR lfn[_MAX_LFN+1];

  // TODO possible buffer overflows here!

  uint8_t index = menuVerticalPosition-menuVerticalOffset;
  char *line = reusableBuffer.sdManager.lines[index];

  if (result == STR_SD_INFO) {
    pushMenu(menuRadioSdManagerInfo);
  }
  else if (result == STR_SD_FORMAT) {
    POPUP_CONFIRMATION(STR_CONFIRM_FORMAT, onSdFormatConfirm);
  }
  else if (result == STR_COPY_FILE) {
    clipboard.type = CLIPBOARD_TYPE_SD_FILE;
    f_getcwd(clipboard.data.sd.directory, CLIPBOARD_PATH_LEN);
    strncpy(clipboard.data.sd.filename, line, CLIPBOARD_PATH_LEN-1);
  }
  else if (result == STR_PASTE) {
    f_getcwd(lfn, _MAX_LFN);
    // if destination is dir, copy into that dir
    if (IS_DIRECTORY(line)) {
      strcat(lfn, "/");
      strcat(lfn, line);
    }
    if (strcmp(clipboard.data.sd.directory, lfn)) {  // prevent copying to the same directory
      POPUP_WARNING(sdCopyFile(clipboard.data.sd.filename, clipboard.data.sd.directory, clipboard.data.sd.filename, lfn));
      REFRESH_FILES();
    }
  }
  else if (result == STR_RENAME_FILE) {
    memcpy(reusableBuffer.sdManager.originalName, line, sizeof(reusableBuffer.sdManager.originalName));
    uint8_t fnlen = 0, extlen = 0;
    getFileExtension(line, 0, LEN_FILE_EXTENSION_MAX, &fnlen, &extlen);
    // write spaces to allow extending the length of a filename
    memset(line + fnlen - extlen, ' ', SD_SCREEN_FILE_LENGTH - fnlen + extlen);
    line[SD_SCREEN_FILE_LENGTH-extlen] = '\0';
    s_editMode = EDIT_MODIFY_STRING;
    editNameCursorPos = 0;
  }
  else if (result == STR_DELETE_FILE) {
    getSelectionFullPath(lfn);
    f_unlink(lfn);
    menuVerticalOffset = 0;
    menuVerticalPosition = 0;
    REFRESH_FILES();
  }
  else if (result == STR_PLAY_FILE) {
    getSelectionFullPath(lfn);
    audioQueue.stopAll();
    audioQueue.playFile(lfn, 0, ID_PLAY_FROM_SD_MANAGER);
  }
  else if (result == STR_ASSIGN_BITMAP) {
    memcpy(g_model.header.bitmap, line, sizeof(g_model.header.bitmap));
    if(modelslist.getCurrentModel())
      modelslist.getCurrentModel()->resetBuffer();
    storageDirty(EE_MODEL);
  }
  else if (result == STR_ASSIGN_SPLASH) {
    f_getcwd(lfn, _MAX_LFN);
    sdCopyFile(line, lfn, SPLASH_FILE, BITMAPS_PATH);
  }
  else if (result == STR_VIEW_TEXT) {
    getSelectionFullPath(lfn);
    pushMenuTextView(lfn);
  }
  else if (result == STR_FLASH_BOOTLOADER) {
    getSelectionFullPath(lfn);
    bootloaderFlash(lfn);
  }
  else if (result == STR_FLASH_INTERNAL_MODULE) {
    getSelectionFullPath(lfn);
    FrskyDeviceFirmwareUpdate device(INTERNAL_MODULE);
    device.flashFirmware(lfn);
  }
  else if (result == STR_FLASH_EXTERNAL_MODULE) {
    getSelectionFullPath(lfn);
    FrskyDeviceFirmwareUpdate device(EXTERNAL_MODULE);
    device.flashFirmware(lfn);
  }
  else if (result == STR_FLASH_EXTERNAL_DEVICE) {
    getSelectionFullPath(lfn);
    FrskyDeviceFirmwareUpdate device(SPORT_MODULE);
    device.flashFirmware(lfn);
  }
#if defined(BLUETOOTH)
  else if (result == STR_FLASH_BLUETOOTH_MODULE) {
    getSelectionFullPath(lfn);
    bluetooth.flashFirmware(lfn);
  }
#endif
#if defined(HARDWARE_POWER_MANAGEMENT_UNIT)
  else if (result == STR_FLASH_POWER_MANAGEMENT_UNIT) {
    getSelectionFullPath(lfn);
    FrskyChipFirmwareUpdate device;
    device.flashFirmware(lfn);
  }
#endif
#if defined(MULTIMODULE)
#if defined(INTERNAL_MODULE_MULTI)
  else if (result == STR_FLASH_INTERNAL_MULTI) {
    getSelectionFullPath(lfn);
    multiFlashFirmware(INTERNAL_MODULE, lfn);
  }
#endif
  else if (result == STR_FLASH_EXTERNAL_MULTI) {
    getSelectionFullPath(lfn);
    multiFlashFirmware(EXTERNAL_MODULE, lfn);
  }
#endif
#if defined(PXX2)
  else if (result == STR_FLASH_RECEIVER_BY_INTERNAL_MODULE_OTA || result == STR_FLASH_RECEIVER_BY_EXTERNAL_MODULE_OTA) {
    memclear(&reusableBuffer.sdManager.otaUpdateInformation, sizeof(OtaUpdateInformation));
    getSelectionFullPath(reusableBuffer.sdManager.otaUpdateInformation.filename);
    reusableBuffer.sdManager.otaUpdateInformation.module = (result == STR_FLASH_RECEIVER_BY_INTERNAL_MODULE_OTA ? INTERNAL_MODULE : EXTERNAL_MODULE);
    moduleState[reusableBuffer.sdManager.otaUpdateInformation.module].startBind(&reusableBuffer.sdManager.otaUpdateInformation, onUpdateStateChanged);
  }
  else if (result == STR_FLASH_FLIGHT_CONTROLLER_BY_INTERNAL_MODULE_OTA || result == STR_FLASH_FLIGHT_CONTROLLER_BY_EXTERNAL_MODULE_OTA) {
    memclear(&reusableBuffer.sdManager.otaUpdateInformation, sizeof(OtaUpdateInformation));
    getSelectionFullPath(reusableBuffer.sdManager.otaUpdateInformation.filename);
    reusableBuffer.sdManager.otaUpdateInformation.module = (result == STR_FLASH_FLIGHT_CONTROLLER_BY_INTERNAL_MODULE_OTA ? INTERNAL_MODULE : EXTERNAL_MODULE);
    moduleState[reusableBuffer.sdManager.otaUpdateInformation.module].startBind(&reusableBuffer.sdManager.otaUpdateInformation, onUpdateStateChanged);
  }
#endif
#if defined(LUA)
  else if (result == STR_EXECUTE_FILE) {
    getSelectionFullPath(lfn);
    luaExec(lfn);
  }
#endif
}

#if defined(PXX2)
void onUpdateReceiverSelection(const char * result)
{
  if (result != STR_EXIT) {
    reusableBuffer.sdManager.otaUpdateInformation.selectedReceiverIndex = (result - reusableBuffer.sdManager.otaUpdateInformation.candidateReceiversNames[0]) / sizeof(reusableBuffer.sdManager.otaUpdateInformation.candidateReceiversNames[0]);
    reusableBuffer.sdManager.otaUpdateInformation.step = BIND_INFO_REQUEST;
#if defined(SIMU)
    reusableBuffer.sdManager.otaUpdateInformation.receiverInformation.modelID = 0x01;
    onUpdateStateChanged();
#endif
  }
  else {
    // the user pressed [Exit]
    moduleState[reusableBuffer.sdManager.otaUpdateInformation.module].mode = MODULE_MODE_NORMAL;
  }
}
#endif

bool menuRadioSdManager(event_t _event)
{
#if defined(PXX2)
  if (EVT_KEY_MASK(_event) == KEY_EXIT && moduleState[reusableBuffer.sdManager.otaUpdateInformation.module].mode == MODULE_MODE_BIND) {
    moduleState[reusableBuffer.sdManager.otaUpdateInformation.module].mode = MODULE_MODE_NORMAL;
    CLEAR_POPUP();
    killEvents(KEY_EXIT);
    _event = 0;
  }
#endif

  event_t event = (EVT_KEY_MASK(_event) == KEY_ENTER ? 0 : _event);
  SIMPLE_MENU(SD_IS_HC() ? STR_SDHC_CARD : STR_SD_CARD, RADIO_ICONS, menuTabGeneral, MENU_RADIO_SD_MANAGER, reusableBuffer.sdManager.count);

  int index = menuVerticalPosition - menuVerticalOffset;

  switch (_event) {
    case EVT_ENTRY:
      f_chdir(ROOT_PATH);
      // no break;

    case EVT_ENTRY_UP:
      memclear(&reusableBuffer.sdManager, sizeof(reusableBuffer.sdManager));
      menuVerticalPosition = 0;
      REFRESH_FILES();
      break;

#if 0
    // TODO: Implement it
    case EVT_KEY_LONG(KEY_MENU):
      if (!READ_ONLY() && s_editMode == 0) {
        killEvents(_event);
        POPUP_MENU_ADD_ITEM(STR_SD_INFO);
        POPUP_MENU_ADD_ITEM(STR_SD_FORMAT);
        POPUP_MENU_START(onSdManagerMenu);
      }
      break;
#endif

    case EVT_KEY_BREAK(KEY_EXIT):
      REFRESH_FILES();
      break;

    case EVT_KEY_BREAK(KEY_ENTER):
      if (s_editMode > 0) {
        break;
      }
      else {
        if (IS_DIRECTORY(reusableBuffer.sdManager.lines[index])) {
          f_chdir(reusableBuffer.sdManager.lines[index]);
          menuVerticalOffset = 0;
          menuVerticalPosition = 1;
          index = 1;
          REFRESH_FILES();
          killEvents(_event);
          return true;
        }
      }
      // no break

    case EVT_KEY_LONG(KEY_ENTER):
      if (s_editMode == 0) {
        killEvents(_event);
        char * line = reusableBuffer.sdManager.lines[index];
        if (!strcmp(line, "..")) {
          break; // no menu for parent dir
        }
        const char * ext = getFileExtension(line);
        if (ext) {
          if (!strcasecmp(ext, SOUNDS_EXT)) {
            POPUP_MENU_ADD_ITEM(STR_PLAY_FILE);
          }
          else if (isExtensionMatching(ext, BITMAPS_EXT)) {
            TCHAR lfn[_MAX_LFN+1];
            f_getcwd(lfn, _MAX_LFN);
            if (!READ_ONLY() && unsigned(strlen(ext)+ext-line) <= sizeof(g_model.header.bitmap) && !strcmp(lfn, BITMAPS_PATH)) {
              POPUP_MENU_ADD_ITEM(STR_ASSIGN_BITMAP);
            }
            if (!strcmp(ext, PNG_EXT)) {
              POPUP_MENU_ADD_ITEM(STR_ASSIGN_SPLASH);
            }
          }
          else if (!READ_ONLY() && !strcasecmp(ext, SPORT_FIRMWARE_EXT)) {
            if (HAS_SPORT_UPDATE_CONNECTOR())
              POPUP_MENU_ADD_ITEM(STR_FLASH_EXTERNAL_DEVICE);
#if defined(INTERNAL_MODULE_PXX1) || defined(INTERNAL_MODULE_PXX2)
            POPUP_MENU_ADD_ITEM(STR_FLASH_INTERNAL_MODULE);
#endif
            POPUP_MENU_ADD_ITEM(STR_FLASH_EXTERNAL_MODULE);
          }
          else if (!READ_ONLY() && !strcasecmp(ext, FRSKY_FIRMWARE_EXT)) {
            FrSkyFirmwareInformation information;
            if (readFrSkyFirmwareInformation(line, information) == nullptr) {
#if defined(INTERNAL_MODULE_PXX1) || defined(INTERNAL_MODULE_PXX2)
              if (information.productFamily == FIRMWARE_FAMILY_INTERNAL_MODULE)
                POPUP_MENU_ADD_ITEM(STR_FLASH_INTERNAL_MODULE);
#endif
              if (information.productFamily == FIRMWARE_FAMILY_EXTERNAL_MODULE)
                POPUP_MENU_ADD_ITEM(STR_FLASH_EXTERNAL_MODULE);
              if (information.productFamily == FIRMWARE_FAMILY_RECEIVER || information.productFamily == FIRMWARE_FAMILY_SENSOR) {
                if (HAS_SPORT_UPDATE_CONNECTOR()) {
                  POPUP_MENU_ADD_ITEM(STR_FLASH_EXTERNAL_DEVICE);
                }
                else {
                  POPUP_MENU_ADD_ITEM(STR_FLASH_EXTERNAL_MODULE);
                }
              }
#if defined(PXX2)
              if (information.productFamily == FIRMWARE_FAMILY_RECEIVER) {
                if (isReceiverOTAEnabledFromModule(INTERNAL_MODULE, information.productId))
                  POPUP_MENU_ADD_ITEM(STR_FLASH_RECEIVER_BY_INTERNAL_MODULE_OTA);
                if (isReceiverOTAEnabledFromModule(EXTERNAL_MODULE, information.productId))
                  POPUP_MENU_ADD_ITEM(STR_FLASH_RECEIVER_BY_EXTERNAL_MODULE_OTA);
              }
              if (information.productFamily == FIRMWARE_FAMILY_FLIGHT_CONTROLLER) {
                POPUP_MENU_ADD_ITEM(STR_FLASH_FLIGHT_CONTROLLER_BY_INTERNAL_MODULE_OTA);
                POPUP_MENU_ADD_ITEM(STR_FLASH_FLIGHT_CONTROLLER_BY_EXTERNAL_MODULE_OTA);
              }
#endif
#if defined(BLUETOOTH)
              if (information.productFamily == FIRMWARE_FAMILY_BLUETOOTH_CHIP)
                POPUP_MENU_ADD_ITEM(STR_FLASH_BLUETOOTH_MODULE);
#endif
#if defined(HARDWARE_POWER_MANAGEMENT_UNIT)
              if (information.productFamily == FIRMWARE_FAMILY_POWER_MANAGEMENT_UNIT)
                POPUP_MENU_ADD_ITEM(STR_FLASH_POWER_MANAGEMENT_UNIT);
#endif
            }
          }

          // Warning FIRMWARE_EXT and MULTI_FIRMWARE_EXT are the same
          if (!READ_ONLY() && !strcasecmp(ext, FIRMWARE_EXT)) {
            TCHAR lfn[_MAX_LFN+1];
            getSelectionFullPath(lfn);
            if (isBootloader(lfn)) {
              POPUP_MENU_ADD_ITEM(STR_FLASH_BOOTLOADER);
            }
          }

#if defined(MULTIMODULE)
          if (!READ_ONLY() && !strcasecmp(ext, MULTI_FIRMWARE_EXT)) {
            TCHAR lfn[_MAX_LFN + 1];
            getSelectionFullPath(lfn);
            MultiFirmwareInformation information;
            if (information.readMultiFirmwareInformation(line) == nullptr) {
#if defined(INTERNAL_MODULE_MULTI)
              POPUP_MENU_ADD_ITEM(STR_FLASH_INTERNAL_MULTI);
#endif
              POPUP_MENU_ADD_ITEM(STR_FLASH_EXTERNAL_MULTI);
            }
          }
#endif

#if defined(LUA)
          if (isExtensionMatching(ext, SCRIPTS_EXT)) {
            POPUP_MENU_ADD_ITEM(STR_EXECUTE_FILE);
          }
#endif

          if (isExtensionMatching(ext, TEXT_EXT) || isExtensionMatching(ext, SCRIPTS_EXT)) {
            POPUP_MENU_ADD_ITEM(STR_VIEW_TEXT);
          }
        }

        if (!READ_ONLY()) {
          if (IS_FILE(line))
            POPUP_MENU_ADD_ITEM(STR_COPY_FILE);
          if (clipboard.type == CLIPBOARD_TYPE_SD_FILE)
            POPUP_MENU_ADD_ITEM(STR_PASTE);
          POPUP_MENU_ADD_ITEM(STR_RENAME_FILE);
          if (IS_FILE(line))
            POPUP_MENU_ADD_ITEM(STR_DELETE_FILE);
        }
        POPUP_MENU_START(onSdManagerMenu);
      }
      break;
  }

  if (reusableBuffer.sdManager.offset != menuVerticalOffset) {
    FILINFO fno;
    DIR dir;

    if (menuVerticalOffset == reusableBuffer.sdManager.offset + 1) {
      memmove(reusableBuffer.sdManager.lines[0], reusableBuffer.sdManager.lines[1], (NUM_BODY_LINES-1)*sizeof(reusableBuffer.sdManager.lines[0]));
      memset(reusableBuffer.sdManager.lines[NUM_BODY_LINES-1], 0xff, SD_SCREEN_FILE_LENGTH);
      NODE_TYPE(reusableBuffer.sdManager.lines[NUM_BODY_LINES-1]) = 1;
    }
    else if (menuVerticalOffset == reusableBuffer.sdManager.offset - 1) {
      memmove(reusableBuffer.sdManager.lines[1], reusableBuffer.sdManager.lines[0], (NUM_BODY_LINES-1)*sizeof(reusableBuffer.sdManager.lines[0]));
      memset(reusableBuffer.sdManager.lines[0], 0, sizeof(reusableBuffer.sdManager.lines[0]));
    }
    else {
      reusableBuffer.sdManager.offset = menuVerticalOffset;
      memset(reusableBuffer.sdManager.lines, 0, sizeof(reusableBuffer.sdManager.lines));
    }

    reusableBuffer.sdManager.count = 0;

    FRESULT res = f_opendir(&dir, "."); // Open the directory
    if (res == FR_OK) {
      bool firstTime = true;
      for (;;) {
        res = sdReadDir(&dir, &fno, firstTime);
        if (res != FR_OK || fno.fname[0] == 0) break;              /* Break on error or end of dir */
        if (strlen(fno.fname) > SD_SCREEN_FILE_LENGTH) continue;
        if (fno.fattrib & AM_HID) continue;                        /* Ignore Windows hidden files */
        if (fno.fname[0] == '.' && fno.fname[1] != '.') continue;  /* Ignore UNIX hidden files, but not .. */

        reusableBuffer.sdManager.count++;

        bool isfile = !(fno.fattrib & AM_DIR);

        if (menuVerticalOffset == 0) {
          for (uint8_t i=0; i<NUM_BODY_LINES; i++) {
            char * line = reusableBuffer.sdManager.lines[i];
            if (line[0] == '\0' || isFilenameLower(isfile, fno.fname, line)) {
              if (i < NUM_BODY_LINES-1) memmove(reusableBuffer.sdManager.lines[i+1], line, sizeof(reusableBuffer.sdManager.lines[i]) * (NUM_BODY_LINES-1-i));
              memset(line, 0, sizeof(reusableBuffer.sdManager.lines[0]));
              strcpy(line, fno.fname);
              NODE_TYPE(line) = isfile;
              break;
            }
          }
        }
        else if (reusableBuffer.sdManager.offset == menuVerticalOffset) {
          for (int8_t i=NUM_BODY_LINES-1; i>=0; i--) {
            char *line = reusableBuffer.sdManager.lines[i];
            if (line[0] == '\0' || isFilenameGreater(isfile, fno.fname, line)) {
              if (i > 0) memmove(reusableBuffer.sdManager.lines[0], reusableBuffer.sdManager.lines[1], sizeof(reusableBuffer.sdManager.lines[0]) * i);
              memset(line, 0, sizeof(reusableBuffer.sdManager.lines[0]));
              strcpy(line, fno.fname);
              NODE_TYPE(line) = isfile;
              break;
            }
          }
        }
        else if (menuVerticalOffset > reusableBuffer.sdManager.offset) {
          if (isFilenameGreater(isfile, fno.fname, reusableBuffer.sdManager.lines[NUM_BODY_LINES-2]) && isFilenameLower(isfile, fno.fname, reusableBuffer.sdManager.lines[NUM_BODY_LINES-1])) {
            memset(reusableBuffer.sdManager.lines[NUM_BODY_LINES-1], 0, sizeof(reusableBuffer.sdManager.lines[0]));
            strcpy(reusableBuffer.sdManager.lines[NUM_BODY_LINES-1], fno.fname);
            NODE_TYPE(reusableBuffer.sdManager.lines[NUM_BODY_LINES-1]) = isfile;
          }
        }
        else {
          if (isFilenameLower(isfile, fno.fname, reusableBuffer.sdManager.lines[1]) && isFilenameGreater(isfile, fno.fname, reusableBuffer.sdManager.lines[0])) {
            memset(reusableBuffer.sdManager.lines[0], 0, sizeof(reusableBuffer.sdManager.lines[0]));
            strcpy(reusableBuffer.sdManager.lines[0], fno.fname);
            NODE_TYPE(reusableBuffer.sdManager.lines[0]) = isfile;
          }
        }
      }
      f_closedir(&dir);
    }
  }

  reusableBuffer.sdManager.offset = menuVerticalOffset;

  for (uint8_t i = 0; i < NUM_BODY_LINES; i++) {
    coord_t y = MENU_CONTENT_TOP + i*FH;
    LcdFlags attr = (index == i ? INVERS : 0);
    if (reusableBuffer.sdManager.lines[i][0]) {
      if (s_editMode == EDIT_MODIFY_STRING && attr) {
        uint8_t extlen, efflen;
        const char * ext = getFileExtension(reusableBuffer.sdManager.originalName, 0, 0, NULL, &extlen);
        editName(MENUS_MARGIN_LEFT, y, reusableBuffer.sdManager.lines[i], SD_SCREEN_FILE_LENGTH - extlen, _event, attr, 0);
        efflen = effectiveLen(reusableBuffer.sdManager.lines[i], SD_SCREEN_FILE_LENGTH - extlen);
        if (s_editMode == 0) {
          if (ext) {
            strAppend(&reusableBuffer.sdManager.lines[i][efflen], ext);
          }
          else {
            reusableBuffer.sdManager.lines[i][efflen] = 0;
          }
          f_rename(reusableBuffer.sdManager.originalName, reusableBuffer.sdManager.lines[i]);
          REFRESH_FILES();
        }
      }
      else if (IS_DIRECTORY(reusableBuffer.sdManager.lines[i])) {
        char s[sizeof(reusableBuffer.sdManager.lines[0])+2];
        char * ptr = s;
        *ptr++ = '[';
        ptr = strAppend(ptr, reusableBuffer.sdManager.lines[i]);
        *ptr++ = ']';
        *ptr = '\0';
        lcdDrawText(MENUS_MARGIN_LEFT, y, s, attr);
      }
      else {
        lcdDrawText(MENUS_MARGIN_LEFT, y, reusableBuffer.sdManager.lines[i], attr);
      }
    }
  }

#if defined(PXX2)
  if (moduleState[reusableBuffer.sdManager.otaUpdateInformation.module].mode == MODULE_MODE_BIND) {
    if (reusableBuffer.sdManager.otaUpdateInformation.step == BIND_INIT) {
      if (reusableBuffer.sdManager.otaUpdateInformation.candidateReceiversCount > 0) {
        if (reusableBuffer.sdManager.otaUpdateInformation.candidateReceiversCount != popupMenuItemsCount) {
          CLEAR_POPUP();
          popupMenuItemsCount = min<uint8_t>(reusableBuffer.sdManager.otaUpdateInformation.candidateReceiversCount, PXX2_MAX_RECEIVERS_PER_MODULE);
          for (auto rx = 0; rx < popupMenuItemsCount; rx++) {
            popupMenuItems[rx] = reusableBuffer.sdManager.otaUpdateInformation.candidateReceiversNames[rx];
          }
          POPUP_MENU_TITLE(STR_PXX2_SELECT_RX);
          POPUP_MENU_START(onUpdateReceiverSelection);
        }
      }
      else {
        DRAW_POPUP_WAIT(STR_WAITING_FOR_RX);
      }
    }
  }
#endif

  const char * ext = getFileExtension(reusableBuffer.sdManager.lines[index]);
  if (ext && isExtensionMatching(ext, BITMAPS_EXT)) {
    if (currentBitmapIndex != menuVerticalPosition) {
      currentBitmapIndex = menuVerticalPosition;
      delete currentBitmap;
      currentBitmap = BitmapBuffer::load(reusableBuffer.sdManager.lines[index]);
    }
    if (currentBitmap) {
      uint16_t height = currentBitmap->getHeight();
      uint16_t width = currentBitmap->getWidth();
      if (height > MENU_BODY_HEIGHT-10) {
        height = MENU_BODY_HEIGHT - 10;
      }
      if (width > LCD_W/2) {
        width = LCD_W/2;
      }
      lcd->drawScaledBitmap(currentBitmap, LCD_W / 2 - 20 + LCD_W/4 - width/2, MENU_BODY_TOP + MENU_BODY_HEIGHT/2 - height/2, width, height);
    }
  }

  return true;
}