/*
 * Copyright © Canonical Ltd.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 2 or 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef MIR_INPUT_EVDEV_PLATFORM_H_
#define MIR_INPUT_EVDEV_PLATFORM_H_

#include "libinput_ptr.h"
#include "libinput_device_ptr.h"
#include "fd_store.h"

#include <mir/input/platform.h>
#include <mir/console_services.h>

#include <sys/stat.h>

#include <vector>
#include <unordered_map>
#include <future>

struct libinput_device_group;
struct libinput_device;

namespace mir
{
namespace udev
{
class Context;
}
namespace dispatch
{
class MultiplexingDispatchable;
class ReadableFd;
class Dispatchable;
class ActionQueue;
}
namespace input
{
class InputDeviceRegistry;
namespace evdev
{

class LibInputDevice;

class Platform : public input::Platform
{
public:
    Platform(
        std::shared_ptr<InputDeviceRegistry> const& registry,
        std::shared_ptr<InputReport> const& report,
        std::unique_ptr<udev::Context>&& udev_context,
        std::shared_ptr<ConsoleServices> const& console);
    std::shared_ptr<mir::dispatch::Dispatchable> dispatchable() override;
    void start() override;
    void stop() override;
    void pause_for_config() override;
    void continue_after_config() override;

private:
    void device_added(libinput_device* dev);
    void device_removed(libinput_device* dev);
    void process_input_events();

    FdStore device_fds;

    std::shared_ptr<InputReport> const report;
    std::shared_ptr<udev::Context> const udev_context;
    std::shared_ptr<InputDeviceRegistry> const input_device_registry;
    std::shared_ptr<ConsoleServices> const console;
    std::shared_ptr<dispatch::MultiplexingDispatchable> const platform_dispatchable;
    std::shared_ptr<::libinput> lib;
    std::shared_ptr<dispatch::ReadableFd> libinput_dispatchable;
    std::shared_ptr<dispatch::Dispatchable> udev_dispatchable;
    std::shared_ptr<dispatch::ActionQueue> action_queue;
    std::unordered_map<dev_t, std::future<std::unique_ptr<mir::Device>>> pending_devices;
    std::unordered_map<dev_t, std::unique_ptr<mir::Device>> device_watchers;

    std::vector<std::shared_ptr<LibInputDevice>> devices;
    auto find_device(libinput_device* dev) -> decltype(devices)::iterator;
};
}
}
}

#endif
