/*
 * Copyright (C) 2020 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.
 */

#define ATRACE_TAG (ATRACE_TAG_POWER | ATRACE_TAG_HAL)
#define LOG_TAG "android.hardware.power-service.samsung-libperfmgr"

#include "Power.h"

#include <mutex>

#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>

#include <utils/Log.h>
#include <utils/Trace.h>

namespace aidl {
namespace google {
namespace hardware {
namespace power {
namespace impl {
namespace pixel {

constexpr char kPowerHalStateProp[] = "vendor.powerhal.state";
constexpr char kPowerHalAudioProp[] = "vendor.powerhal.audio";
constexpr char kPowerHalRenderingProp[] = "vendor.powerhal.rendering";

Power::Power(std::shared_ptr<HintManager> hm)
    : mHintManager(hm), mInteractionHandler(nullptr), mVRModeOn(false),
      mSustainedPerfModeOn(false) {
  mInteractionHandler = std::make_unique<InteractionHandler>(mHintManager);
  mInteractionHandler->Init();

  std::string state = ::android::base::GetProperty(kPowerHalStateProp, "");
  if (state == "SUSTAINED_PERFORMANCE") {
    ALOGI("Initialize with SUSTAINED_PERFORMANCE on");
    mHintManager->DoHint("SUSTAINED_PERFORMANCE");
    mSustainedPerfModeOn = true;
  } else if (state == "VR") {
    ALOGI("Initialize with VR on");
    mHintManager->DoHint(state);
    mVRModeOn = true;
  } else if (state == "VR_SUSTAINED_PERFORMANCE") {
    ALOGI("Initialize with SUSTAINED_PERFORMANCE and VR on");
    mHintManager->DoHint("VR_SUSTAINED_PERFORMANCE");
    mSustainedPerfModeOn = true;
    mVRModeOn = true;
  } else {
    ALOGI("Initialize PowerHAL");
  }

  state = ::android::base::GetProperty(kPowerHalAudioProp, "");
  if (state == "AUDIO_STREAMING_LOW_LATENCY") {
    ALOGI("Initialize with AUDIO_LOW_LATENCY on");
    mHintManager->DoHint(state);
  }

  state = ::android::base::GetProperty(kPowerHalRenderingProp, "");
  if (state == "EXPENSIVE_RENDERING") {
    ALOGI("Initialize with EXPENSIVE_RENDERING on");
    mHintManager->DoHint("EXPENSIVE_RENDERING");
  }

  // Now start to take powerhint
  ALOGI("PowerHAL ready to process hints");
}

ndk::ScopedAStatus Power::setMode(Mode type, bool enabled) {
  LOG(DEBUG) << "Power setMode: " << toString(type) << " to: " << enabled;
  ATRACE_INT(toString(type).c_str(), enabled);
  switch (type) {
  case Mode::LOW_POWER:
    if (enabled) {
      mHintManager->DoHint(toString(type));
    } else {
      mHintManager->EndHint(toString(type));
    }
    break;
  case Mode::SUSTAINED_PERFORMANCE:
    if (enabled && !mSustainedPerfModeOn) {
      if (!mVRModeOn) { // Sustained mode only.
        mHintManager->DoHint("SUSTAINED_PERFORMANCE");
      } else { // Sustained + VR mode.
        mHintManager->EndHint("VR");
        mHintManager->DoHint("VR_SUSTAINED_PERFORMANCE");
      }
      mSustainedPerfModeOn = true;
    } else if (!enabled && mSustainedPerfModeOn) {
      mHintManager->EndHint("VR_SUSTAINED_PERFORMANCE");
      mHintManager->EndHint("SUSTAINED_PERFORMANCE");
      if (mVRModeOn) { // Switch back to VR Mode.
        mHintManager->DoHint("VR");
      }
      mSustainedPerfModeOn = false;
    }
    break;
  case Mode::VR:
    if (enabled && !mVRModeOn) {
      if (!mSustainedPerfModeOn) { // VR mode only.
        mHintManager->DoHint("VR");
      } else { // Sustained + VR mode.
        mHintManager->EndHint("SUSTAINED_PERFORMANCE");
        mHintManager->DoHint("VR_SUSTAINED_PERFORMANCE");
      }
      mVRModeOn = true;
    } else if (!enabled && mVRModeOn) {
      mHintManager->EndHint("VR_SUSTAINED_PERFORMANCE");
      mHintManager->EndHint("VR");
      if (mSustainedPerfModeOn) { // Switch back to sustained Mode.
        mHintManager->DoHint("SUSTAINED_PERFORMANCE");
      }
      mVRModeOn = false;
    }
    break;
  case Mode::LAUNCH:
    if (mVRModeOn || mSustainedPerfModeOn) {
      break;
    }
    [[fallthrough]];
  case Mode::DOUBLE_TAP_TO_WAKE:
    [[fallthrough]];
  case Mode::FIXED_PERFORMANCE:
    [[fallthrough]];
  case Mode::EXPENSIVE_RENDERING:
    [[fallthrough]];
  case Mode::INTERACTIVE:
    [[fallthrough]];
  case Mode::DEVICE_IDLE:
    [[fallthrough]];
  case Mode::DISPLAY_INACTIVE:
    [[fallthrough]];
  case Mode::AUDIO_STREAMING_LOW_LATENCY:
    [[fallthrough]];
  case Mode::CAMERA_STREAMING_SECURE:
    [[fallthrough]];
  case Mode::CAMERA_STREAMING_LOW:
    [[fallthrough]];
  case Mode::CAMERA_STREAMING_MID:
    [[fallthrough]];
  case Mode::CAMERA_STREAMING_HIGH:
    [[fallthrough]];
  default:
    if (enabled) {
      mHintManager->DoHint(toString(type));
    } else {
      mHintManager->EndHint(toString(type));
    }
    break;
  }

  return ndk::ScopedAStatus::ok();
}

ndk::ScopedAStatus Power::isModeSupported(Mode type, bool *_aidl_return) {
  bool supported = mHintManager->IsHintSupported(toString(type));
  switch (type) {
  case Mode::LOW_POWER: // LOW_POWER handled insides PowerHAL specifically
    supported = true;
    break;
  case Mode::DOUBLE_TAP_TO_WAKE:
    supported = true;
    break;
  case Mode::INTERACTIVE:
    supported = true;
    break;
  default:
    break;
  }

  LOG(INFO) << "Power mode " << toString(type)
            << " isModeSupported: " << supported;
  *_aidl_return = supported;
  return ndk::ScopedAStatus::ok();
}

ndk::ScopedAStatus Power::setBoost(Boost type, int32_t durationMs) {
  LOG(DEBUG) << "Power setBoost: " << toString(type)
             << " duration: " << durationMs;
  ATRACE_INT(toString(type).c_str(), durationMs);
  switch (type) {
  case Boost::INTERACTION:
    if (mVRModeOn || mSustainedPerfModeOn) {
      break;
    }
    mInteractionHandler->Acquire(durationMs);
    break;
  case Boost::DISPLAY_UPDATE_IMMINENT:
    [[fallthrough]];
  case Boost::ML_ACC:
    [[fallthrough]];
  case Boost::AUDIO_LAUNCH:
    [[fallthrough]];
  case Boost::CAMERA_LAUNCH:
    [[fallthrough]];
  case Boost::CAMERA_SHOT:
    [[fallthrough]];
  default:
    if (mVRModeOn || mSustainedPerfModeOn) {
      break;
    }
    if (durationMs > 0) {
      mHintManager->DoHint(toString(type),
                           std::chrono::milliseconds(durationMs));
    } else if (durationMs == 0) {
      mHintManager->DoHint(toString(type));
    } else {
      mHintManager->EndHint(toString(type));
    }
    break;
  }

  return ndk::ScopedAStatus::ok();
}

ndk::ScopedAStatus Power::isBoostSupported(Boost type, bool *_aidl_return) {
  bool supported = mHintManager->IsHintSupported(toString(type));
  LOG(INFO) << "Power boost " << toString(type)
            << " isBoostSupported: " << supported;
  *_aidl_return = supported;
  return ndk::ScopedAStatus::ok();
}

constexpr const char *boolToString(bool b) { return b ? "true" : "false"; }

binder_status_t Power::dump(int fd, const char **, uint32_t) {
  std::string buf(::android::base::StringPrintf(
      "HintManager Running: %s\n"
      "VRMode: %s\n"
      "SustainedPerformanceMode: %s\n",
      boolToString(mHintManager->IsRunning()), boolToString(mVRModeOn),
      boolToString(mSustainedPerfModeOn)));
  // Dump nodes through libperfmgr
  mHintManager->DumpToFd(fd);
  if (!::android::base::WriteStringToFd(buf, fd)) {
    PLOG(ERROR) << "Failed to dump state to fd";
  }
  fsync(fd);
  return STATUS_OK;
}

} // namespace pixel
} // namespace impl
} // namespace power
} // namespace hardware
} // namespace google
} // namespace aidl
