/**
 * Copyright 2017 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 "config.h"

#include "build/buildjson.hpp"
#include "conf.hpp"
#include "interfaces.hpp"
#include "pid/builder.hpp"
#include "pid/buildjson.hpp"
#include "pid/pidloop.hpp"
#include "pid/tuning.hpp"
#include "pid/zone.hpp"
#include "sensors/builder.hpp"
#include "sensors/buildjson.hpp"
#include "sensors/manager.hpp"
#include "util.hpp"

#include <CLI/CLI.hpp>
#include <boost/asio/io_context.hpp>
#include <boost/asio/steady_timer.hpp>
#include <chrono>
#include <iostream>
#include <list>
#include <map>
#include <memory>
#include <sdbusplus/asio/connection.hpp>
#include <sdbusplus/bus.hpp>
#include <thread>
#include <unordered_map>
#include <utility>
#include <vector>

#if CONFIGURE_DBUS
#include "dbus/dbusconfiguration.hpp"
#endif

/* The YAML converted sensor list. */
std::map<std::string, struct conf::SensorConfig> sensorConfig = {};
/* The YAML converted PID list. */
std::map<int64_t, conf::PIDConf> zoneConfig = {};
/* The YAML converted Zone configuration. */
std::map<int64_t, struct conf::ZoneConfig> zoneDetailsConfig = {};

/** the swampd daemon will check for the existence of this file. */
constexpr auto jsonConfigurationPath = "/usr/share/swampd/config.json";

int main(int argc, char* argv[])
{
    int rc = 0;
    std::string configPath = "";
    tuningLoggingPath = "";

    CLI::App app{"OpenBMC Fan Control Daemon"};

    app.add_option("-c,--conf", configPath,
                   "Optional parameter to specify configuration at run-time")
        ->check(CLI::ExistingFile);
    app.add_option("-t,--tuning", tuningLoggingPath,
                   "Optional parameter to specify tuning logging path, and "
                   "enable tuning")
        ->check(CLI::ExistingFile);

    CLI11_PARSE(app, argc, argv);

    tuningLoggingEnabled = (tuningLoggingPath.length() > 0);

    auto modeControlBus = sdbusplus::bus::new_system();
    static constexpr auto modeRoot = "/xyz/openbmc_project/settings/fanctrl";
    // Create a manager for the ModeBus because we own it.
    sdbusplus::server::manager::manager(modeControlBus, modeRoot);

#if CONFIGURE_DBUS
    {
        dbus_configuration::init(modeControlBus);
    }
#else
    const std::string& path =
        (configPath.length() > 0) ? configPath : jsonConfigurationPath;

    /*
     * When building the sensors, if any of the dbus passive ones aren't on the
     * bus, it'll fail immediately.
     */
    try
    {
        auto jsonData = parseValidateJson(path);
        sensorConfig = buildSensorsFromJson(jsonData);
        std::tie(zoneConfig, zoneDetailsConfig) = buildPIDsFromJson(jsonData);
    }
    catch (const std::exception& e)
    {
        std::cerr << "Failed during building: " << e.what() << "\n";
        exit(EXIT_FAILURE); /* fatal error. */
    }
#endif

    SensorManager mgmr = buildSensors(sensorConfig);
    std::unordered_map<int64_t, std::unique_ptr<PIDZone>> zones =
        buildZones(zoneConfig, zoneDetailsConfig, mgmr, modeControlBus);

    if (0 == zones.size())
    {
        std::cerr << "No zones defined, exiting.\n";
        return rc;
    }

    /*
     * All sensors are managed by one manager, but each zone has a pointer to
     * it.
     */

    auto& hostSensorBus = mgmr.getHostBus();
    auto& passiveListeningBus = mgmr.getPassiveBus();

    boost::asio::io_context io;
    sdbusplus::asio::connection passiveBus(io, passiveListeningBus.release());

    sdbusplus::asio::connection hostBus(io, hostSensorBus.release());
    hostBus.request_name("xyz.openbmc_project.Hwmon.external");

    sdbusplus::asio::connection modeBus(io, modeControlBus.release());
    modeBus.request_name("xyz.openbmc_project.State.FanCtrl");

    std::list<boost::asio::steady_timer> timers;

    for (const auto& i : zones)
    {
        auto& timer = timers.emplace_back(io);
        std::cerr << "pushing zone" << std::endl;
        pidControlLoop(i.second.get(), timer);
    }

    io.run();
    return rc;
}