/** @file
  Main file for DevTree shell Driver1 function.

  (C) Copyright 2014-2015 Hewlett-Packard Development Company, L.P.<BR>
  Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "UefiShellDriver1CommandsLib.h"

STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
  {L"-d", TypeFlag},
  {L"-l", TypeValue},
  {NULL, TypeMax}
  };

/**
  Display a tree starting from this handle.

  @param[in] TheHandle      The handle to start with.
  @param[in] Lang           Optionally, a UEFI defined language code.
  @param[in] UseDevPaths    TRUE to display info from DevPath as identifiers.
                            FALSE will use component name protocol instead.
  @param[in] IndentCharCount   How many characters to indent (allows for recursion).
  @param[in] HiiString      The string from HII to use for output.

  @retval SHELL_SUCCESS     The operation was successful.
**/
SHELL_STATUS
DoDevTreeForHandle(
  IN CONST EFI_HANDLE TheHandle,
  IN CONST CHAR8      *Lang OPTIONAL,
  IN CONST BOOLEAN    UseDevPaths,
  IN CONST UINTN      IndentCharCount,
  IN CONST CHAR16     *HiiString
  )
{
  SHELL_STATUS        ShellStatus;
  EFI_STATUS          Status;
  CHAR16              *FormatString;
  CHAR16              *Name;
  EFI_HANDLE          *ChildHandleBuffer;
  UINTN               ChildCount;
  UINTN               LoopVar;

  Status              = EFI_SUCCESS;
  ShellStatus         = SHELL_SUCCESS;
  Name                = NULL;
  ChildHandleBuffer   = NULL;
  ChildCount          = 0;

  ASSERT (TheHandle != NULL);
  ASSERT (HiiString != NULL);

  if (ShellGetExecutionBreakFlag()) {
    ShellStatus = SHELL_ABORTED;
    return ShellStatus;
  }

  //
  // We want controller handles.  they will not have LoadedImage or DriverBinding (or others...)
  //
  Status = gBS->OpenProtocol (
                TheHandle,
                &gEfiDriverBindingProtocolGuid,
                NULL,
                NULL,
                NULL,
                EFI_OPEN_PROTOCOL_TEST_PROTOCOL
               );
  if (!EFI_ERROR (Status)) {
    return SHELL_SUCCESS;
  }

  Status = gBS->OpenProtocol (
                TheHandle,
                &gEfiLoadedImageProtocolGuid,
                NULL,
                NULL,
                NULL,
                EFI_OPEN_PROTOCOL_TEST_PROTOCOL
               );
  if (!EFI_ERROR (Status)) {
    return SHELL_SUCCESS;
  }

  FormatString = AllocateZeroPool(StrSize(HiiString) + (10)*sizeof(FormatString[0]));
  if (FormatString == NULL) {
    return SHELL_OUT_OF_RESOURCES;
  }

  //
  // we generate the format string on the fly so that we can control the
  // number of space characters that the first (empty) string has.  this
  // handles the indenting.
  //

  UnicodeSPrint(FormatString, StrSize(HiiString) + (10)*sizeof(FormatString[0]), L"%%%ds %s", IndentCharCount, HiiString);
  gEfiShellProtocol->GetDeviceName((EFI_HANDLE)TheHandle, !UseDevPaths?EFI_DEVICE_NAME_USE_COMPONENT_NAME|EFI_DEVICE_NAME_USE_DEVICE_PATH:EFI_DEVICE_NAME_USE_DEVICE_PATH, (CHAR8*)Lang, &Name);
  //
  // print out the information for ourselves
  //
  ShellPrintEx(
    -1,
    -1,
    FormatString,
    L"",
    ConvertHandleToHandleIndex(TheHandle),
    Name==NULL?L"Unknown":Name);

  FreePool(FormatString);
  if (Name != NULL) {
    FreePool(Name);
  }

  //
  // recurse on each child handle with IndentCharCount + 2
  //
  ParseHandleDatabaseForChildControllers(TheHandle, &ChildCount, &ChildHandleBuffer);
  for (LoopVar = 0 ; LoopVar < ChildCount && ShellStatus == SHELL_SUCCESS; LoopVar++){
    ShellStatus = DoDevTreeForHandle(ChildHandleBuffer[LoopVar], Lang, UseDevPaths, IndentCharCount+2, HiiString);
    if (ShellStatus == SHELL_ABORTED) {
      break;
    }
  }

  if (ChildHandleBuffer != NULL) {
    FreePool(ChildHandleBuffer);
  }

  return (ShellStatus);
}

/**
  Function for 'devtree' command.

  @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
**/
SHELL_STATUS
EFIAPI
ShellCommandRunDevTree (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS          Status;
  LIST_ENTRY          *Package;
  CHAR16              *ProblemParam;
  SHELL_STATUS        ShellStatus;
  CHAR8               *Language;
  CONST CHAR16        *Lang;
  CHAR16              *HiiString;
  UINTN               LoopVar;
  EFI_HANDLE          TheHandle;
  BOOLEAN             FlagD;
  UINT64              Intermediate;
  UINTN               ParentControllerHandleCount;
  EFI_HANDLE          *ParentControllerHandleBuffer;

  ShellStatus         = SHELL_SUCCESS;
  Status              = EFI_SUCCESS;
  Language                = NULL;

  //
  // initialize the shell lib (we must be in non-auto-init...)
  //
  Status = ShellInitialize();
  ASSERT_EFI_ERROR(Status);

  Status = CommandInit();
  ASSERT_EFI_ERROR(Status);

  //
  // parse the command line
  //
  Status = ShellCommandLineParse (ParamList, &Package, &ProblemParam, TRUE);
  if (EFI_ERROR(Status)) {
    if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellDriver1HiiHandle, L"devtree", ProblemParam);
      FreePool(ProblemParam);
      ShellStatus = SHELL_INVALID_PARAMETER;
    } else {
      ASSERT(FALSE);
    }
  } else {
    if (ShellCommandLineGetCount(Package) > 2) {
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellDriver1HiiHandle, L"devtree");
      ShellCommandLineFreeVarList (Package);
      return (SHELL_INVALID_PARAMETER);
    }
    Lang = ShellCommandLineGetValue(Package, L"-l");
    if (Lang != NULL) {
      Language = AllocateZeroPool(StrSize(Lang));
      AsciiSPrint(Language, StrSize(Lang), "%S", Lang);
    } else if (!ShellCommandLineGetFlag(Package, L"-l")){
      ASSERT(Language == NULL);
//      Language = AllocateZeroPool(10);
//      AsciiSPrint(Language, 10, "en-us");
    } else {
      ASSERT(Language == NULL);
      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_VALUE), gShellDriver1HiiHandle, L"devtree",  L"-l");
      ShellCommandLineFreeVarList (Package);
      return (SHELL_INVALID_PARAMETER);
    }
    FlagD = ShellCommandLineGetFlag(Package, L"-d");

    Lang = ShellCommandLineGetRawValue(Package, 1);
    HiiString = HiiGetString(gShellDriver1HiiHandle, STRING_TOKEN (STR_DEV_TREE_OUTPUT), Language);

    if (Lang == NULL) {
      for (LoopVar = 1 ; ; LoopVar++){
        TheHandle = ConvertHandleIndexToHandle(LoopVar);
        if (TheHandle == NULL){
          break;
        }

        //
        // Skip handles that do not have device path protocol
        //
        Status = gBS->OpenProtocol (
                      TheHandle,
                      &gEfiDevicePathProtocolGuid,
                      NULL,
                      NULL,
                      NULL,
                      EFI_OPEN_PROTOCOL_TEST_PROTOCOL
                     );
        if (EFI_ERROR (Status)) {
          continue;
        }

        //
        // Skip handles that do have parents
        //
        ParentControllerHandleBuffer = NULL;
        Status = PARSE_HANDLE_DATABASE_PARENTS (
                   TheHandle,
                   &ParentControllerHandleCount,
                   &ParentControllerHandleBuffer
                   );
        SHELL_FREE_NON_NULL (ParentControllerHandleBuffer);
        if (ParentControllerHandleCount > 0) {
          continue;
        }

        //
        // Start a devtree from TheHandle that has a device path and no parents
        //
        ShellStatus = DoDevTreeForHandle(TheHandle, Language, FlagD, 0, HiiString);
      }
    } else {
      Status = ShellConvertStringToUint64(Lang, &Intermediate, TRUE, FALSE);
      if (EFI_ERROR(Status) || ConvertHandleIndexToHandle((UINTN)Intermediate) == NULL) {
        ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_INV_HANDLE), gShellDriver1HiiHandle, L"devtree", Lang);
        ShellStatus = SHELL_INVALID_PARAMETER;
      } else {
        ShellStatus = DoDevTreeForHandle(ConvertHandleIndexToHandle((UINTN)Intermediate), Language, FlagD, 0, HiiString);
      }
    }

    if (HiiString != NULL) {
      FreePool(HiiString);
    }
    SHELL_FREE_NON_NULL(Language);
    ShellCommandLineFreeVarList (Package);
  }

  return (ShellStatus);
}