/** @file
  Main file for Edit shell Debug1 function.

  (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
  Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved. <BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "UefiShellDebug1CommandsLib.h"
#include "TextEditor.h"

/**
  Function for 'edit' 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
ShellCommandRunEdit (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS    Status;
  CHAR16        *Buffer;
  CHAR16        *ProblemParam;
  SHELL_STATUS  ShellStatus;
  LIST_ENTRY    *Package;
  CONST CHAR16  *Cwd;
  CHAR16        *Nfs;
  CHAR16        *Spot;
  CONST CHAR16  *TempParam;

  Buffer      = NULL;
  ShellStatus = SHELL_SUCCESS;
  Nfs         = 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 (EmptyParamList, &Package, &ProblemParam, TRUE);
  if (EFI_ERROR (Status)) {
    if ((Status == EFI_VOLUME_CORRUPTED) && (ProblemParam != NULL)) {
      ShellPrintHiiDefaultEx (STRING_TOKEN (STR_GEN_PROBLEM), gShellDebug1HiiHandle, L"edit", ProblemParam);
      FreePool (ProblemParam);
      ShellStatus = SHELL_INVALID_PARAMETER;
    } else {
      ASSERT (FALSE);
    }

    return ShellStatus;
  }

  if (ShellCommandLineGetCount (Package) > 2) {
    ShellPrintHiiDefaultEx (STRING_TOKEN (STR_GEN_TOO_MANY), gShellDebug1HiiHandle, L"edit");
    ShellStatus = SHELL_INVALID_PARAMETER;
  } else {
    Cwd = gEfiShellProtocol->GetCurDir (NULL);
    if (Cwd == NULL) {
      Cwd = ShellGetEnvironmentVariable (L"path");
      if (Cwd != NULL) {
        Nfs = StrnCatGrow (&Nfs, NULL, Cwd+3, 0);
        if (Nfs != NULL) {
          Spot = StrStr (Nfs, L";");
          if (Spot != NULL) {
            *Spot = CHAR_NULL;
          }

          Spot = StrStr (Nfs, L"\\");
          if (Spot != NULL) {
            Spot[1] = CHAR_NULL;
          }

          gEfiShellProtocol->SetCurDir (NULL, Nfs);
          FreePool (Nfs);
        }
      }
    }

    Status = MainEditorInit ();

    if (EFI_ERROR (Status)) {
      gST->ConOut->ClearScreen (gST->ConOut);
      gST->ConOut->EnableCursor (gST->ConOut, TRUE);
      ShellPrintHiiDefaultEx (STRING_TOKEN (STR_EDIT_MAIN_INIT_FAILED), gShellDebug1HiiHandle);
    } else {
      MainEditorBackup ();

      //
      // if editor launched with file named
      //
      if (ShellCommandLineGetCount (Package) == 2) {
        TempParam = ShellCommandLineGetRawValue (Package, 1);
        if (TempParam == NULL) {
          ASSERT (TempParam != NULL);
          ShellPrintHiiDefaultEx (STRING_TOKEN (STR_GEN_PARAM_INV), gShellDebug1HiiHandle, L"edit");
          ShellStatus = SHELL_INVALID_PARAMETER;
        } else {
          FileBufferSetFileName (TempParam);
        }
      }

      Status = FileBufferRead (MainEditor.FileBuffer->FileName, FALSE);
      if (!EFI_ERROR (Status)) {
        MainEditorRefresh ();

        Status = MainEditorKeyInput ();
      }

      if (Status != EFI_OUT_OF_RESOURCES) {
        //
        // back up the status string
        //
        Buffer = CatSPrint (NULL, L"%s", StatusBarGetString ());
      }

      MainEditorCleanup ();

      //
      // print editor exit code on screen
      //
      if (Status == EFI_SUCCESS) {
      } else if (Status == EFI_OUT_OF_RESOURCES) {
        ShellPrintHiiDefaultEx (STRING_TOKEN (STR_GEN_OUT_MEM), gShellDebug1HiiHandle, L"edit");
      } else {
        if (Buffer != NULL) {
          if (StrCmp (Buffer, L"") != 0) {
            //
            // print out the status string
            //
            ShellPrintHiiDefaultEx (STRING_TOKEN (STR_EDIT_MAIN_BUFFER), gShellDebug1HiiHandle, Buffer);
          } else {
            ShellPrintHiiDefaultEx (STRING_TOKEN (STR_EDIT_MAIN_UNKNOWN_EDITOR_ERR), gShellDebug1HiiHandle);
          }
        } else {
          ShellPrintHiiDefaultEx (STRING_TOKEN (STR_EDIT_MAIN_UNKNOWN_EDITOR_ERR), gShellDebug1HiiHandle);
        }
      }

      if (Status != EFI_OUT_OF_RESOURCES) {
        SHELL_FREE_NON_NULL (Buffer);
      }
    }
  }

  ShellCommandLineFreeVarList (Package);

  return ShellStatus;
}