/* SPDX-License-Identifier: GPL-2.0-or-later */

/** \file
 * \ingroup GHOST
 * Declaration of GHOST_SystemWayland class.
 */

#pragma once

#include "../GHOST_Types.h"
#include "GHOST_System.h"
#include "GHOST_WindowWayland.h"

#include <wayland-client.h>
#include <xdg-decoration-client-protocol.h>
#include <xdg-shell-client-protocol.h>

#include <string>

class GHOST_WindowWayland;

struct display_t;

struct output_t {
  struct wl_output *wl_output = nullptr;
  struct zxdg_output_v1 *xdg_output = nullptr;
  /** Dimensions in pixels. */
  int32_t size_native[2] = {0, 0};
  /** Dimensions in millimeter. */
  int32_t size_mm[2] = {0, 0};

  int32_t size_logical[2] = {0, 0};
  bool has_size_logical = false;

  int32_t position_logical[2] = {0, 0};
  bool has_position_logical = false;

  int transform = 0;
  int scale = 1;
  /**
   * The integer `scale` value should be used in almost all cases,
   * as this is what is used for most API calls.
   * Only use fractional scaling to calculate the DPI.
   *
   * \note Internally an #wl_fixed_t is used to store the scale of the display,
   * so use the same value here (avoid floating point arithmetic in general).
   */
  wl_fixed_t scale_fractional = wl_fixed_from_int(1);
  bool has_scale_fractional = false;

  std::string make;
  std::string model;
};

class GHOST_SystemWayland : public GHOST_System {
 public:
  GHOST_SystemWayland();

  ~GHOST_SystemWayland() override;

  bool processEvents(bool waitForEvent) override;

  int setConsoleWindowState(GHOST_TConsoleWindowState action) override;

  GHOST_TSuccess getModifierKeys(GHOST_ModifierKeys &keys) const override;

  GHOST_TSuccess getButtons(GHOST_Buttons &buttons) const override;

  char *getClipboard(bool selection) const override;

  void putClipboard(const char *buffer, bool selection) const override;

  uint8_t getNumDisplays() const override;

  GHOST_TSuccess getCursorPosition(int32_t &x, int32_t &y) const override;

  GHOST_TSuccess setCursorPosition(int32_t x, int32_t y) override;

  void getMainDisplayDimensions(uint32_t &width, uint32_t &height) const override;

  void getAllDisplayDimensions(uint32_t &width, uint32_t &height) const override;

  GHOST_IContext *createOffscreenContext(GHOST_GLSettings glSettings) override;

  GHOST_TSuccess disposeContext(GHOST_IContext *context) override;

  GHOST_IWindow *createWindow(const char *title,
                              int32_t left,
                              int32_t top,
                              uint32_t width,
                              uint32_t height,
                              GHOST_TWindowState state,
                              GHOST_TDrawingContextType type,
                              GHOST_GLSettings glSettings,
                              const bool exclusive,
                              const bool is_dialog,
                              const GHOST_IWindow *parentWindow) override;

  wl_display *display();

  wl_compositor *compositor();

  xdg_wm_base *xdg_shell();

  zxdg_decoration_manager_v1 *xdg_decoration_manager();

  const std::vector<output_t *> &outputs() const;

  wl_shm *shm() const;

  void setSelection(const std::string &selection);

  GHOST_TSuccess setCursorShape(GHOST_TStandardCursor shape);

  GHOST_TSuccess hasCursorShape(GHOST_TStandardCursor cursorShape);

  GHOST_TSuccess setCustomCursorShape(uint8_t *bitmap,
                                      uint8_t *mask,
                                      int sizex,
                                      int sizey,
                                      int hotX,
                                      int hotY,
                                      bool canInvertColor);

  GHOST_TSuccess setCursorVisibility(bool visible);

  bool supportsCursorWarp();
  bool supportsWindowPosition();

  GHOST_TSuccess setCursorGrab(const GHOST_TGrabCursorMode mode,
                               const GHOST_TGrabCursorMode mode_current,
                               wl_surface *surface);

 private:
  struct display_t *d;
  std::string selection;
};