/*
 *  Feynman -- Wayland compositor for GNU Emacs
 *
 * Copyright (c) 2022 Sameer Rahmani <lxsameer@gnu.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 2.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef FEYNMAN_COMPOSITOR_H
#define FEYNMAN_COMPOSITOR_H

#include <linux/limits.h>
#include <pthread.h>
#include <wayland-server-core.h>
#include <wayland-server.h>
#include <wlr/backend.h>
#include <wlr/render/allocator.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_cursor.h>
#include <wlr/types/wlr_data_device.h>
#include <wlr/types/wlr_input_device.h>
#include <wlr/types/wlr_keyboard.h>
#include <wlr/types/wlr_output.h>
#include <wlr/types/wlr_output_layout.h>
#include <wlr/types/wlr_pointer.h>
#include <wlr/types/wlr_scene.h>
#include <wlr/types/wlr_seat.h>
#include <wlr/types/wlr_xcursor_manager.h>
#include <wlr/types/wlr_xdg_shell.h>
#include <wlr/util/log.h>
#include <xkbcommon/xkbcommon.h>

enum feynman_cursor_mode
{
  FEYNMAN_CURSOR_PASSTHROUGH,
  FEYNMAN_CURSOR_MOVE,
  FEYNMAN_CURSOR_RESIZE,
};

// This struct holds the state of the WM
struct feynman_server
{
  struct wl_display *wl_display;
  struct wlr_backend *backend;
  struct wlr_renderer *renderer;
  struct wlr_allocator *allocator;
  struct wlr_scene *scene;

  struct wlr_xdg_shell *xdg_shell;
  struct wl_listener new_xdg_surface;
  struct wl_list views;

  struct wlr_cursor *cursor;
  struct wlr_xcursor_manager *cursor_mgr;
  struct wl_listener cursor_motion;
  struct wl_listener cursor_motion_absolute;
  struct wl_listener cursor_button;
  struct wl_listener cursor_axis;
  struct wl_listener cursor_frame;

  struct wlr_seat *seat;
  struct wl_listener new_input;
  struct wl_listener request_cursor;
  struct wl_listener request_set_selection;
  struct wl_list keyboards;
  enum feynman_cursor_mode cursor_mode;
  struct feynman_view *grabbed_view;
  double grab_x, grab_y;
  struct wlr_box grab_geobox;
  uint32_t resize_edges;

  struct wlr_output_layout *output_layout;
  struct wl_list outputs;
  struct wl_listener new_output;

  char log_file[PATH_MAX];
  pthread_t server_thread_id;
};

struct feynman_output
{
  struct wl_list link;
  struct feynman_server *server;
  struct wlr_output *wlr_output;
  struct wl_listener frame;
};

struct feynman_view
{
  struct wl_list link;
  struct feynman_server *server;
  struct wlr_xdg_surface *xdg_surface;
  struct wlr_scene_node *scene_node;
  struct wl_listener map;
  struct wl_listener unmap;
  struct wl_listener destroy;
  struct wl_listener request_move;
  struct wl_listener request_resize;
  int x, y;
};

struct feynman_keyboard
{
  struct wl_list link;
  struct feynman_server *server;
  struct wlr_input_device *device;

  struct wl_listener modifiers;
  struct wl_listener key;
};
int init_feynman_server (struct feynman_server *server);
void start_feynman (struct feynman_server *server);
void stop_feynman (struct feynman_server *server);
#endif