/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "cuttlefish/host/libs/config/vmm_mode.h"

#include <ostream>
#include <string>
#include <string_view>

#include "absl/strings/match.h"

#include "cuttlefish/result/result.h"

namespace cuttlefish {

std::string ToString(VmmMode mode) {
  return std::string(format_as(mode));
}

std::ostream& operator<<(std::ostream& out, VmmMode vmm) {
  return out << format_as(vmm);
}

Result<VmmMode> ParseVmm(std::string_view str) {
  if (absl::EqualsIgnoreCase(str, "crosvm")) {
    return VmmMode::kCrosvm;
  } else if (absl::EqualsIgnoreCase(str, "gem5")) {
    return VmmMode::kGem5;
  } else if (absl::EqualsIgnoreCase(str, "qemu_cli")) {
    return VmmMode::kQemu;
  } else {
    return CF_ERRF("\"{}\" is not a valid Vmm.", str);
  }
}

bool VmManagerIsCrosvm(VmmMode mode) { return mode == VmmMode::kCrosvm; }

bool VmManagerIsQemu(VmmMode mode) { return mode == VmmMode::kQemu; }

bool VmManagerIsGem5(VmmMode mode) { return mode == VmmMode::kGem5; }

// for libfmt
std::string_view format_as(VmmMode vmm) {
  switch (vmm) {
    case VmmMode::kUnknown:
      return "unknown";
    case VmmMode::kCrosvm:
      return "crosvm";
    case VmmMode::kGem5:
      return "gem5";
    case VmmMode::kQemu:
      return "qemu_cli";
  }
}

}  // namespace cuttlefish
