//===- llvm/TextAPI/Platform.cpp - Platform ---------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Implementations of Platform Helper functions.
//
//===----------------------------------------------------------------------===//

#include "llvm/TextAPI/Platform.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Triple.h"

namespace llvm {
namespace MachO {

PlatformKind mapToPlatformKind(PlatformKind Platform, bool WantSim) {
  switch (Platform) {
  default:
    return Platform;
  case PlatformKind::iOS:
    return WantSim ? PlatformKind::iOSSimulator : PlatformKind::iOS;
  case PlatformKind::tvOS:
    return WantSim ? PlatformKind::tvOSSimulator : PlatformKind::tvOS;
  case PlatformKind::watchOS:
    return WantSim ? PlatformKind::watchOSSimulator : PlatformKind::watchOS;
  }
  llvm_unreachable("Unknown llvm::MachO::PlatformKind enum");
}

PlatformKind mapToPlatformKind(const Triple &Target) {
  switch (Target.getOS()) {
  default:
    return PlatformKind::unknown;
  case Triple::MacOSX:
    return PlatformKind::macOS;
  case Triple::IOS:
    if (Target.isSimulatorEnvironment())
      return PlatformKind::iOSSimulator;
    if (Target.getEnvironment() == Triple::MacABI)
      return PlatformKind::macCatalyst;
    return PlatformKind::iOS;
  case Triple::TvOS:
    return Target.isSimulatorEnvironment() ? PlatformKind::tvOSSimulator
                                           : PlatformKind::tvOS;
  case Triple::WatchOS:
    return Target.isSimulatorEnvironment() ? PlatformKind::watchOSSimulator
                                           : PlatformKind::watchOS;
    // TODO: add bridgeOS & driverKit once in llvm::Triple
  }
  llvm_unreachable("Unknown Target Triple");
}

PlatformSet mapToPlatformSet(ArrayRef<Triple> Targets) {
  PlatformSet Result;
  for (const auto &Target : Targets)
    Result.insert(mapToPlatformKind(Target));
  return Result;
}

StringRef getPlatformName(PlatformKind Platform) {
  switch (Platform) {
  case PlatformKind::unknown:
    return "unknown";
  case PlatformKind::macOS:
    return "macOS";
  case PlatformKind::iOS:
    return "iOS";
  case PlatformKind::tvOS:
    return "tvOS";
  case PlatformKind::watchOS:
    return "watchOS";
  case PlatformKind::bridgeOS:
    return "bridgeOS";
  case PlatformKind::macCatalyst:
    return "macCatalyst";
  case PlatformKind::iOSSimulator:
    return "iOS Simulator";
  case PlatformKind::tvOSSimulator:
    return "tvOS Simulator";
  case PlatformKind::watchOSSimulator:
    return "watchOS Simulator";
  case PlatformKind::driverKit:
    return "DriverKit";
  }
  llvm_unreachable("Unknown llvm::MachO::PlatformKind enum");
}

PlatformKind getPlatformFromName(StringRef Name) {
  return StringSwitch<PlatformKind>(Name)
      .Case("macos", PlatformKind::macOS)
      .Case("ios", PlatformKind::iOS)
      .Case("tvos", PlatformKind::tvOS)
      .Case("watchos", PlatformKind::watchOS)
      .Case("bridgeos", PlatformKind::macOS)
      .Case("ios-macabi", PlatformKind::macCatalyst)
      .Case("ios-simulator", PlatformKind::iOSSimulator)
      .Case("tvos-simulator", PlatformKind::tvOSSimulator)
      .Case("watchos-simulator", PlatformKind::watchOSSimulator)
      .Case("driverkit", PlatformKind::driverKit)
      .Default(PlatformKind::unknown);
}

std::string getOSAndEnvironmentName(PlatformKind Platform,
                                    std::string Version) {
  switch (Platform) {
  case PlatformKind::unknown:
    return "darwin" + Version;
  case PlatformKind::macOS:
    return "macos" + Version;
  case PlatformKind::iOS:
    return "ios" + Version;
  case PlatformKind::tvOS:
    return "tvos" + Version;
  case PlatformKind::watchOS:
    return "watchos" + Version;
  case PlatformKind::bridgeOS:
    return "bridgeos" + Version;
  case PlatformKind::macCatalyst:
    return "ios" + Version + "-macabi";
  case PlatformKind::iOSSimulator:
    return "ios" + Version + "-simulator";
  case PlatformKind::tvOSSimulator:
    return "tvos" + Version + "-simulator";
  case PlatformKind::watchOSSimulator:
    return "watchos" + Version + "-simulator";
  case PlatformKind::driverKit:
    return "driverkit" + Version;
  }
  llvm_unreachable("Unknown llvm::MachO::PlatformKind enum");
}

} // end namespace MachO.
} // end namespace llvm.