/** @file
  Copyright (C) 2018, vit9696. All rights reserved.
  Copyright (C) 2020, PMheart. All rights reserved.

  All rights reserved.

  This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/

#include "ocvalidate.h"
#include "OcValidateLib.h"

#include <Library/OcMainLib.h>

#include <UserFile.h>

UINT32
CheckConfig (
  IN  OC_GLOBAL_CONFIG  *Config
  )
{
  UINT32               ErrorCount;
  UINT32               CurrErrorCount;
  UINTN                Index;
  STATIC CONFIG_CHECK  ConfigCheckers[] = {
    &CheckACPI,
    &CheckBooter,
    &CheckDeviceProperties,
    &CheckKernel,
    &CheckMisc,
    &CheckNvram,
    &CheckPlatformInfo,
    &CheckUEFI
  };

  ErrorCount     = 0;
  CurrErrorCount = 0;

  //
  // Pass config structure to all checkers.
  //
  for (Index = 0; Index < ARRAY_SIZE (ConfigCheckers); ++Index) {
    CurrErrorCount = ConfigCheckers[Index] (Config);

    if (CurrErrorCount != 0) {
      //
      // Print an extra newline on error.
      //
      DEBUG ((DEBUG_WARN, "\n"));
      ErrorCount += CurrErrorCount;
    }
  }

  return ErrorCount;
}

int ENTRY_POINT(int argc, const char *argv[]) {
  UINT8              *ConfigFileBuffer;
  UINT32             ConfigFileSize;
  CONST CHAR8        *ConfigFileName;
  INT64              ExecTimeStart;
  OC_GLOBAL_CONFIG   Config;
  EFI_STATUS         Status;
  UINT32             ErrorCount;

  ErrorCount = 0;

  //
  // Enable PCD debug logging.
  //
  PcdGet8  (PcdDebugPropertyMask)         |= DEBUG_PROPERTY_DEBUG_CODE_ENABLED;
  PcdGet32 (PcdFixedDebugPrintErrorLevel) |= DEBUG_INFO;
  PcdGet32 (PcdDebugPrintErrorLevel)      |= DEBUG_INFO;

  //
  // Print usage.
  //
  if (argc != 2 || (argc > 1 && AsciiStrCmp (argv[1], "--version") == 0)) {
    DEBUG ((DEBUG_ERROR, "\nNOTE: This version of ocvalidate is only compatible with OpenCore version %a!\n\n", OPEN_CORE_VERSION));
    DEBUG ((DEBUG_ERROR, "Usage: %a <path/to/config.plist>\n\n", argv[0]));
    return -1;
  }

  //
  // Read config file (Only one single config is supported).
  //
  ConfigFileName   = argv[1];
  ConfigFileBuffer = UserReadFile (ConfigFileName, &ConfigFileSize);
  if (ConfigFileBuffer == NULL) {
    DEBUG ((DEBUG_ERROR, "Failed to read %a\n", ConfigFileName));
    return -1;
  }

  //
  // Record the current time when action starts.
  //
  ExecTimeStart = GetCurrentTimestamp ();

  //
  // Initialise config structure to be checked, and exit on error.
  //
  Status = OcConfigurationInit (&Config, ConfigFileBuffer, ConfigFileSize, &ErrorCount);
  if (EFI_ERROR (Status)) {
    DEBUG ((DEBUG_ERROR, "Invalid config\n"));
    return -1;
  }

  //
  // Print a newline that splits errors between OcConfigurationInit and config checkers.
  //
  DEBUG ((DEBUG_ERROR, "\n"));
  ErrorCount += CheckConfig (&Config);

  OcConfigurationFree (&Config);
  FreePool (ConfigFileBuffer);

  if (ErrorCount == 0) {
    DEBUG ((
      DEBUG_ERROR,
      "Completed validating %a in %llu ms. No issues found.\n",
      ConfigFileName,
      GetCurrentTimestamp () - ExecTimeStart
      ));
  } else {
    DEBUG ((
      DEBUG_ERROR,
      "Completed validating %a in %llu ms. Found %u %a requiring attention.\n",
      ConfigFileName,
      GetCurrentTimestamp () - ExecTimeStart,
      ErrorCount,
      ErrorCount > 1 ? "issues" : "issue"
      ));

    return EXIT_FAILURE;
  }

  return 0;
}

INT32 LLVMFuzzerTestOneInput(CONST UINT8 *Data, UINTN Size) {
  VOID              *NewData;
  OC_GLOBAL_CONFIG  Config;

  NewData = AllocatePool (Size);
  if (NewData != NULL) {
    CopyMem (NewData, Data, Size);
    OcConfigurationInit (&Config, NewData, Size, NULL);
    OcConfigurationFree (&Config);
    FreePool (NewData);
  }

  return 0;
}