// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_EXO_WAYLAND_SERVER_H_
#define COMPONENTS_EXO_WAYLAND_SERVER_H_

#include <memory>
#include <string>

#include "base/containers/flat_map.h"
#include "base/macros.h"
#include "base/time/time.h"
#include "components/exo/wayland/scoped_wl.h"
#include "ui/display/display_observer.h"

struct wl_resource;
struct wl_client;

namespace exo {
class Display;

namespace wayland {

class SerialTracker;
struct WaylandDataDeviceManager;
class WaylandDisplayOutput;
struct WaylandSeat;
struct WaylandTextInputManager;
struct WaylandXdgShell;
struct WaylandZxdgShell;

// This class is a thin wrapper around a Wayland display server. All Wayland
// requests are dispatched into the given Exosphere display.
class Server : public display::DisplayObserver {
 public:
  explicit Server(Display* display);
  ~Server() override;

  // Creates a Wayland display server that clients can connect to using the
  // default socket name.
  static std::unique_ptr<Server> Create(Display* display);

  // This adds a Unix socket to the Wayland display server which can be used
  // by clients to connect to the display server.
  bool AddSocket(const std::string name);

  // Returns the file descriptor associated with the server.
  int GetFileDescriptor() const;

  // This function dispatches events. This must be called on a thread for
  // which it's safe to access the Exosphere display that this server was
  // created for. The |timeout| argument specifies the amount of time that
  // Dispatch() should block waiting for the file descriptor to become ready.
  void Dispatch(base::TimeDelta timeout);

  // Send all buffered events to the clients.
  void Flush();

  // Overridden from display::DisplayObserver:
  void OnDisplayAdded(const display::Display& new_display) override;
  void OnDisplayRemoved(const display::Display& old_display) override;

  wl_resource* GetOutputResource(wl_client* client, int64_t display_id);

  Display* GetDisplay() { return display_; }

 private:
  Display* const display_;
  // Deleting wl_display depends on SerialTracker.
  std::unique_ptr<SerialTracker> serial_tracker_;
  std::unique_ptr<wl_display, WlDisplayDeleter> wl_display_;
  base::flat_map<int64_t, std::unique_ptr<WaylandDisplayOutput>> outputs_;
  std::unique_ptr<WaylandDataDeviceManager> data_device_manager_data_;
  std::unique_ptr<WaylandSeat> seat_data_;

#if defined(OS_CHROMEOS)
  std::unique_ptr<WaylandTextInputManager> zwp_text_manager_data_;
  std::unique_ptr<WaylandZxdgShell> zxdg_shell_data_;
  std::unique_ptr<WaylandXdgShell> xdg_shell_data_;
#endif

  DISALLOW_COPY_AND_ASSIGN(Server);
};

}  // namespace wayland
}  // namespace exo

#endif  // COMPONENTS_EXO_WAYLAND_SERVER_H_