// Copyright 2019 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <base/files/file_util.h>

#include <gtest/gtest.h>

#include <libmems/iio_context.h>
#include <libmems/iio_device.h>
#include <libmems/test_fakes.h>
#include "mems_setup/configuration.h"
#include "mems_setup/delegate.h"
#include "mems_setup/sensor_location.h"
#include "mems_setup/test_fakes.h"
#include "mems_setup/test_helper.h"

using libmems::fakes::FakeIioChannel;
using libmems::fakes::FakeIioContext;
using libmems::fakes::FakeIioDevice;
using mems_setup::fakes::FakeDelegate;
using mems_setup::testing::SensorTestBase;

namespace mems_setup {

namespace {

static gid_t kChronosGroupId = 666;
static gid_t kPowerGroupId = 999;

class AccelerometerTest : public SensorTestBase {
 public:
  AccelerometerTest()
      : SensorTestBase(
            "cros-ec-accel", "iio:device1", SensorKind::ACCELEROMETER) {
    mock_delegate_->AddGroup("chronos", kChronosGroupId);
  }
};

TEST_F(AccelerometerTest, MissingVpd) {
  SetSingleSensor(kBaseSensorLocation);
  ConfigureVpd({{"in_accel_x_base_calibbias", "100"}});

  EXPECT_TRUE(GetConfiguration()->Configure());

  EXPECT_TRUE(
      mock_device_->ReadNumberAttribute("in_accel_x_calibbias").has_value());
  EXPECT_EQ(
      100,
      mock_device_->ReadNumberAttribute("in_accel_x_calibbias").value_or(0));
  EXPECT_FALSE(
      mock_device_->ReadNumberAttribute("in_accel_y_calibbias").has_value());
  EXPECT_FALSE(
      mock_device_->ReadNumberAttribute("in_accel_z_calibbias").has_value());
}

TEST_F(AccelerometerTest, NotNumericVpd) {
  SetSingleSensor(kBaseSensorLocation);
  ConfigureVpd({{"in_accel_x_base_calibbias", "blah"},
                {"in_accel_y_base_calibbias", "104"}});

  EXPECT_TRUE(GetConfiguration()->Configure());

  EXPECT_FALSE(
      mock_device_->ReadNumberAttribute("in_accel_x_calibbias").has_value());
  EXPECT_TRUE(
      mock_device_->ReadNumberAttribute("in_accel_y_calibbias").has_value());
  EXPECT_EQ(104,
            mock_device_->ReadNumberAttribute("in_accel_y_calibbias").value());
  EXPECT_FALSE(
      mock_device_->ReadNumberAttribute("in_accel_z_calibbias").has_value());
}

TEST_F(AccelerometerTest, VpdOutOfRange) {
  SetSingleSensor(kBaseSensorLocation);
  ConfigureVpd({{"in_accel_x_base_calibbias", "123456789"},
                {"in_accel_y_base_calibbias", "104"},
                {"in_accel_z_base_calibbias", "85"}});

  EXPECT_TRUE(GetConfiguration()->Configure());

  EXPECT_FALSE(
      mock_device_->ReadNumberAttribute("in_accel_x_calibbias").has_value());
  EXPECT_TRUE(
      mock_device_->ReadNumberAttribute("in_accel_y_calibbias").has_value());
  EXPECT_TRUE(
      mock_device_->ReadNumberAttribute("in_accel_z_calibbias").has_value());

  EXPECT_EQ(104,
            mock_device_->ReadNumberAttribute("in_accel_y_calibbias").value());
  EXPECT_EQ(85,
            mock_device_->ReadNumberAttribute("in_accel_z_calibbias").value());
}

TEST_F(AccelerometerTest, NotLoadingTriggerModule) {
  SetSingleSensor(kBaseSensorLocation);
  ConfigureVpd({{"in_accel_x_base_calibbias", "50"},
                {"in_accel_y_base_calibbias", "104"},
                {"in_accel_z_base_calibbias", "85"}});

  EXPECT_TRUE(GetConfiguration()->Configure());

  EXPECT_EQ(0, mock_delegate_->GetNumModulesProbed());
}

TEST_F(AccelerometerTest, MultipleSensorDevice) {
  SetSharedSensor();
  ConfigureVpd({{"in_accel_x_base_calibbias", "50"},
                {"in_accel_y_base_calibbias", "104"},
                {"in_accel_z_base_calibbias", "85"},
                {"in_accel_y_lid_calibbias", "27"}});

  EXPECT_TRUE(GetConfiguration()->Configure());

  EXPECT_EQ(
      50,
      mock_device_->ReadNumberAttribute("in_accel_x_base_calibbias").value());
  EXPECT_EQ(
      104,
      mock_device_->ReadNumberAttribute("in_accel_y_base_calibbias").value());
  EXPECT_EQ(
      85,
      mock_device_->ReadNumberAttribute("in_accel_z_base_calibbias").value());

  EXPECT_FALSE(mock_device_->ReadNumberAttribute("in_accel_x_lid_calibbias")
                   .has_value());
  EXPECT_EQ(
      27,
      mock_device_->ReadNumberAttribute("in_accel_y_lid_calibbias").value());
  EXPECT_FALSE(mock_device_->ReadNumberAttribute("in_accel_z_lid_calibbias")
                   .has_value());
}

TEST_F(AccelerometerTest, TriggerPermissions) {
  SetSingleSensor(kLidSensorLocation);
  EXPECT_TRUE(GetConfiguration()->Configure());

  base::FilePath trigger_now = mock_trigger0_->GetPath().Append("trigger_now");
  EXPECT_NE(0, mock_delegate_->GetPermissions(trigger_now) &
                   base::FILE_PERMISSION_WRITE_BY_GROUP);
  gid_t gid = 0;
  mock_delegate_->GetOwnership(trigger_now, nullptr, &gid);
  EXPECT_EQ(kChronosGroupId, gid);
}

TEST_F(AccelerometerTest, SingleSensorEnableChannels) {
  SetSingleSensor(kLidSensorLocation);
  EXPECT_TRUE(GetConfiguration()->Configure());

  for (const auto& channel : channels_) {
    EXPECT_EQ(channel->IsEnabled(), 0 != strcmp(channel->GetId(), "timestamp"));
  }
}

TEST_F(AccelerometerTest, MultipleSensorEnableChannels) {
  SetSharedSensor();
  EXPECT_TRUE(GetConfiguration()->Configure());

  for (const auto& channel : channels_) {
    EXPECT_EQ(channel->IsEnabled(), 0 != strcmp(channel->GetId(), "timestamp"));
  }
}

TEST_F(AccelerometerTest, BufferEnabled) {
  SetSingleSensor(kLidSensorLocation);
  EXPECT_FALSE(mock_device_->IsBufferEnabled());

  EXPECT_TRUE(GetConfiguration()->Configure());

  size_t accel_buffer_len = 0;
  EXPECT_TRUE(mock_device_->IsBufferEnabled(&accel_buffer_len));
  EXPECT_EQ(1, accel_buffer_len);
}

TEST_F(AccelerometerTest, SingleSensorKbWakeAnglePermissions) {
  base::FilePath kb_path("/sys/class/chromeos/cros_ec/kb_wake_angle");

  SetSingleSensor(kLidSensorLocation);
  mock_delegate_->CreateFile(kb_path);
  mock_delegate_->AddGroup("power", kPowerGroupId);
  EXPECT_TRUE(GetConfiguration()->Configure());

  EXPECT_NE(0, mock_delegate_->GetPermissions(kb_path) &
                   base::FILE_PERMISSION_WRITE_BY_GROUP);
  gid_t gid = 0;
  mock_delegate_->GetOwnership(kb_path, nullptr, &gid);
  EXPECT_EQ(kPowerGroupId, gid);
}

TEST_F(AccelerometerTest, SharedSensorKbWakeAnglePermissions) {
  base::FilePath kb_path = mock_device_->GetPath().Append("in_angl_offset");

  SetSharedSensor();
  mock_delegate_->CreateFile(kb_path);
  mock_delegate_->AddGroup("power", kPowerGroupId);
  EXPECT_TRUE(GetConfiguration()->Configure());

  EXPECT_NE(0, mock_delegate_->GetPermissions(kb_path) &
                   base::FILE_PERMISSION_WRITE_BY_GROUP);
  gid_t gid = 0;
  mock_delegate_->GetOwnership(kb_path, nullptr, &gid);
  EXPECT_EQ(kPowerGroupId, gid);
}

TEST_F(AccelerometerTest, OkWithTrigger0Defined) {
  SetSingleSensor(kLidSensorLocation);

  mock_context_->AddDevice(mock_trigger0_.get());

  EXPECT_TRUE(GetConfiguration()->Configure());
}

}  // namespace

}  // namespace mems_setup