#include "clang_utils.h"

#include "filesystem.hh"
#include "platform.h"

#include <clang/AST/Type.h>
using namespace clang;
using namespace llvm;

std::string FileName(CXFile file) {
  std::string ret;
  // clang > 6
#if CINDEX_VERSION >= 48
  ret = ToString(clang_File_tryGetRealPathName(file));
#endif
  if (ret.empty())
    // clang_getFileName return values may contain ..
    ret = NormalizePath(ToString(clang_getFileName(file)));
  // Resolve /usr/include/c++/7.3.0 symlink.
  if (!StartsWith(ret, g_config->projectRoot)) {
    SmallString<256> dest;
    sys::fs::real_path(ret, dest);
    ret = dest.str();
  }
  return ret;
}

std::string FileName(const FileEntry& file) {
  StringRef Name = file.tryGetRealPathName();
  if (Name.empty())
    Name = file.getName();
  std::string ret = NormalizePath(Name);
  // Resolve /usr/include/c++/7.3.0 symlink.
  if (!StartsWith(ret, g_config->projectRoot)) {
    SmallString<256> dest;
    sys::fs::real_path(ret, dest);
    ret = dest.str();
  }
  return ret;
}

std::string ToString(CXString cx_string) {
  std::string string;
  if (cx_string.data != nullptr) {
    string = clang_getCString(cx_string);
    clang_disposeString(cx_string);
  }
  return string;
}

std::string ToString(CXCursorKind kind) {
  return ToString(clang_getCursorKindSpelling(kind));
}

// clang::BuiltinType::getName without PrintingPolicy
const char* ClangBuiltinTypeName(int kind) {
  switch (BuiltinType::Kind(kind)) {
  case BuiltinType::Void:
    return "void";
  case BuiltinType::Bool:
    return "bool";
  case BuiltinType::Char_S:
    return "char";
  case BuiltinType::Char_U:
    return "char";
  case BuiltinType::SChar:
    return "signed char";
  case BuiltinType::Short:
    return "short";
  case BuiltinType::Int:
    return "int";
  case BuiltinType::Long:
    return "long";
  case BuiltinType::LongLong:
    return "long long";
  case BuiltinType::Int128:
    return "__int128";
  case BuiltinType::UChar:
    return "unsigned char";
  case BuiltinType::UShort:
    return "unsigned short";
  case BuiltinType::UInt:
    return "unsigned int";
  case BuiltinType::ULong:
    return "unsigned long";
  case BuiltinType::ULongLong:
    return "unsigned long long";
  case BuiltinType::UInt128:
    return "unsigned __int128";
  case BuiltinType::Half:
    return "__fp16";
  case BuiltinType::Float:
    return "float";
  case BuiltinType::Double:
    return "double";
  case BuiltinType::LongDouble:
    return "long double";
  case BuiltinType::ShortAccum:
    return "short _Accum";
  case BuiltinType::Accum:
    return "_Accum";
  case BuiltinType::LongAccum:
    return "long _Accum";
  case BuiltinType::UShortAccum:
    return "unsigned short _Accum";
  case BuiltinType::UAccum:
    return "unsigned _Accum";
  case BuiltinType::ULongAccum:
    return "unsigned long _Accum";
  case BuiltinType::BuiltinType::ShortFract:
    return "short _Fract";
  case BuiltinType::BuiltinType::Fract:
    return "_Fract";
  case BuiltinType::BuiltinType::LongFract:
    return "long _Fract";
  case BuiltinType::BuiltinType::UShortFract:
    return "unsigned short _Fract";
  case BuiltinType::BuiltinType::UFract:
    return "unsigned _Fract";
  case BuiltinType::BuiltinType::ULongFract:
    return "unsigned long _Fract";
  case BuiltinType::BuiltinType::SatShortAccum:
    return "_Sat short _Accum";
  case BuiltinType::BuiltinType::SatAccum:
    return "_Sat _Accum";
  case BuiltinType::BuiltinType::SatLongAccum:
    return "_Sat long _Accum";
  case BuiltinType::BuiltinType::SatUShortAccum:
    return "_Sat unsigned short _Accum";
  case BuiltinType::BuiltinType::SatUAccum:
    return "_Sat unsigned _Accum";
  case BuiltinType::BuiltinType::SatULongAccum:
    return "_Sat unsigned long _Accum";
  case BuiltinType::BuiltinType::SatShortFract:
    return "_Sat short _Fract";
  case BuiltinType::BuiltinType::SatFract:
    return "_Sat _Fract";
  case BuiltinType::BuiltinType::SatLongFract:
    return "_Sat long _Fract";
  case BuiltinType::BuiltinType::SatUShortFract:
    return "_Sat unsigned short _Fract";
  case BuiltinType::BuiltinType::SatUFract:
    return "_Sat unsigned _Fract";
  case BuiltinType::BuiltinType::SatULongFract:
    return "_Sat unsigned long _Fract";
  case BuiltinType::Float16:
    return "_Float16";
  case BuiltinType::Float128:
    return "__float128";
  case BuiltinType::WChar_S:
  case BuiltinType::WChar_U:
    return "wchar_t";
  case BuiltinType::Char8:
    return "char8_t";
  case BuiltinType::Char16:
    return "char16_t";
  case BuiltinType::Char32:
    return "char32_t";
  case BuiltinType::NullPtr:
    return "nullptr_t";
  case BuiltinType::Overload:
    return "<overloaded function type>";
  case BuiltinType::BoundMember:
    return "<bound member function type>";
  case BuiltinType::PseudoObject:
    return "<pseudo-object type>";
  case BuiltinType::Dependent:
    return "<dependent type>";
  case BuiltinType::UnknownAny:
    return "<unknown type>";
  case BuiltinType::ARCUnbridgedCast:
    return "<ARC unbridged cast type>";
  case BuiltinType::BuiltinFn:
    return "<builtin fn type>";
  case BuiltinType::ObjCId:
    return "id";
  case BuiltinType::ObjCClass:
    return "Class";
  case BuiltinType::ObjCSel:
    return "SEL";
  case BuiltinType::OCLSampler:
    return "sampler_t";
  case BuiltinType::OCLEvent:
    return "event_t";
  case BuiltinType::OCLClkEvent:
    return "clk_event_t";
  case BuiltinType::OCLQueue:
    return "queue_t";
  case BuiltinType::OCLReserveID:
    return "reserve_id_t";
  case BuiltinType::OMPArraySection:
    return "<OpenMP array section type>";
  default:
    return "";
  }
}