/*
 * Copyright 2019 Google Inc.
 *
 * 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 "verify.hpp"

#include "status.hpp"

#include <fstream>
#include <memory>
#include <sdbusplus/bus.hpp>
#include <string>
#include <vector>

namespace blobs
{

std::unique_ptr<VerificationInterface>
    Verification::CreateDefaultVerification(sdbusplus::bus::bus&& bus,
                                            const std::string& path,
                                            const std::string& service)
{
    return std::make_unique<Verification>(std::move(bus), path, service);
}

bool Verification::triggerVerification()
{
    static constexpr auto systemdService = "org.freedesktop.systemd1";
    static constexpr auto systemdRoot = "/org/freedesktop/systemd1";
    static constexpr auto systemdInterface = "org.freedesktop.systemd1.Manager";

    auto method = bus.new_method_call(systemdService, systemdRoot,
                                      systemdInterface, "StartUnit");
    method.append(triggerService);
    method.append("replace");

    try
    {
        bus.call_noreply(method);
    }
    catch (const sdbusplus::exception::SdBusError& ex)
    {
        /* TODO: Once logging supports unit-tests, add a log message to test
         * this failure.
         */
        return false;
    }

    return true;
}

void Verification::abortVerification()
{
    /* TODO: Implement this. */
}

VerifyCheckResponses Verification::checkVerificationState()
{
    VerifyCheckResponses result = VerifyCheckResponses::other;

    std::ifstream ifs;
    ifs.open(checkPath);
    if (ifs.good())
    {
        /*
         * Check for the contents of the file, accepting:
         * running, success, or failed.
         */
        std::string status;
        ifs >> status;
        if (status == "running")
        {
            result = VerifyCheckResponses::running;
        }
        else if (status == "success")
        {
            result = VerifyCheckResponses::success;
        }
        else if (status == "failed")
        {
            result = VerifyCheckResponses::failed;
        }
    }

    return result;
}

} // namespace blobs