#include "llvm/System/Path.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/raw_ostream.h"

#include <string>

namespace llvmc {
  extern char *ProgramName;

  namespace autogenerated {
    extern llvm::cl::opt<std::string> AutoGeneratedParameter_p;
  }
}

using namespace llvm;
using namespace llvmc;

// Returns the platform specific directory separator via #ifdefs.
// FIXME: This currently work on linux and windows only. It does not
// work on other unices.
static std::string GetDirSeparator() {
#if __linux__ || __APPLE__
  return "/";
#else
  return "\\";
#endif
}

namespace hooks {
// Get preprocessor define for the part.
// It is __partname format in lower case.
std::string
GetLowerCasePartDefine(void) {
  std::string Partname;
  if (autogenerated::AutoGeneratedParameter_p.empty()) {
    Partname = "16f1xxx";
  } else {
    Partname = autogenerated::AutoGeneratedParameter_p;
  }

  std::string LowerCase;
  for (unsigned i = 0; i < Partname.size(); i++) {
    LowerCase.push_back(std::tolower(Partname[i]));
  }

  return "__" + LowerCase;
}

std::string
GetUpperCasePartDefine(void) {
  std::string Partname;
  if (autogenerated::AutoGeneratedParameter_p.empty()) {
    Partname = "16f1xxx";
  } else {
    Partname = autogenerated::AutoGeneratedParameter_p;
  }

  std::string UpperCase;
  for (unsigned i = 0; i < Partname.size(); i++) {
    UpperCase.push_back(std::toupper(Partname[i]));
  }

  return "__" +  UpperCase;
}

// Get the dir where c16 executables reside.
std::string GetBinDir() {
  // Construct a Path object from the program name.
  void *P = (void*) (intptr_t) GetBinDir;
  sys::Path ProgramFullPath
    = sys::Path::GetMainExecutable(llvmc::ProgramName, P);

  // Get the dir name for the program. It's last component should be 'bin'.
  std::string BinDir = ProgramFullPath.getDirname();

  // llvm::errs() << "BinDir: " << BinDir << '\n';
  return BinDir + GetDirSeparator();
}

// Get the Top-level Installation dir for c16.
std::string GetInstallDir() {
  sys::Path BinDirPath = sys::Path(GetBinDir());

  // Go one more level up to get the install dir.
  std::string InstallDir  = BinDirPath.getDirname();

  return InstallDir + GetDirSeparator();
}

// Get the dir where the c16 header files reside.
std::string GetStdHeadersDir() {
  return GetInstallDir() + "include";
}

// Get the dir where the assembler header files reside.
std::string GetStdAsmHeadersDir() {
  return GetInstallDir() + "inc";
}

// Get the dir where the linker scripts reside.
std::string GetStdLinkerScriptsDir() {
  return GetInstallDir() + "lkr";
}

// Get the dir where startup code, intrinsics and lib reside.
std::string GetStdLibsDir() {
  return GetInstallDir() + "lib";
}
}