/*
 * Copyright (C) 2019 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 "os/parameter_provider.h"

#include <bluetooth/log.h>
#include <unistd.h>

#include <cerrno>
#include <mutex>
#include <string>

namespace bluetooth {
namespace os {

namespace {
std::mutex parameter_mutex;
std::string hci_instance_name;
std::string sysprops_file_path;
}  // namespace

// Write to $PWD/bt_stack.conf if $PWD can be found, otherwise, write to $HOME/bt_stack.conf
std::string ParameterProvider::ConfigFilePath() {
  const std::string name = GetHciInstanceName();
  char cwd[PATH_MAX] = {};
  if (getcwd(cwd, sizeof(cwd)) == nullptr) {
    log::error("Failed to get current working directory due to \"{}\", returning default",
               strerror(errno));
    return (name == "default") ? "bt_config.conf" : name + "_" + "bt_config.conf";
  }

  return (name == "default") ? std::string(cwd) + "/bt_config.conf"
                             : std::string(cwd) + "/" + name + "_bt_config.conf";
}

std::string ParameterProvider::SnoopLogFilePath() {
  const std::string name = GetHciInstanceName();
  char cwd[PATH_MAX] = {};
  if (getcwd(cwd, sizeof(cwd)) == nullptr) {
    log::error("Failed to get current working directory due to \"{}\", returning default",
               strerror(errno));
    return (name == "default") ? "btsnoop_hci.log" : name + "_btsnoop_hci.log";
  }
  return (name == "default") ? std::string(cwd) + "/btsnoop_hci.log"
                             : std::string(cwd) + "/" + name + "_btsnoop_hci.log";
}

// Return the path to the default snooz log file location
std::string ParameterProvider::SnoozLogFilePath() {
  const std::string name = GetHciInstanceName();
  char cwd[PATH_MAX] = {};
  if (getcwd(cwd, sizeof(cwd)) == nullptr) {
    log::error("Failed to get current working directory due to \"{}\", returning default",
               strerror(errno));
    return (name == "default") ? "btsnooz_hci.log" : name + "_btsnooz_hci.log";
  }
  return (name == "default") ? std::string(cwd) + "/btsnooz_hci.log"
                             : std::string(cwd) + "/" + name + "_btsnooz_hci.log";
}

std::string ParameterProvider::SyspropsFilePath() {
  std::lock_guard<std::mutex> lock(parameter_mutex);
  return sysprops_file_path;
}

void ParameterProvider::OverrideSyspropsFilePath(const std::string& path) {
  std::lock_guard<std::mutex> lock(parameter_mutex);
  sysprops_file_path = path;
}

bluetooth_keystore::BluetoothKeystoreInterface* ParameterProvider::GetBtKeystoreInterface() {
  return nullptr;
}

void ParameterProvider::SetBtKeystoreInterface(
        bluetooth_keystore::BluetoothKeystoreInterface* /* bt_keystore */) {}

bool ParameterProvider::IsCommonCriteriaMode() { return false; }

void ParameterProvider::SetCommonCriteriaMode(bool /* enable */) {}

int ParameterProvider::GetCommonCriteriaConfigCompareResult() { return 0b11; }

void ParameterProvider::SetCommonCriteriaConfigCompareResult(int /* result */) {}

void ParameterProvider::SetHciInstanceName(const std::string& name) { hci_instance_name = name; }

std::string ParameterProvider::GetHciInstanceName() {
  if (!hci_instance_name.empty()) {
    return hci_instance_name;
  }
  return "default";
}

}  // namespace os
}  // namespace bluetooth