#ifndef DIYAC_H
#define DIYAC_H
#include <wayland-server-core.h>
#include <wlr/backend.h>
#include <wlr/types/wlr_xdg_shell.h>
#include <wlr/types/wlr_layer_shell_v1.h>
#include <wlr/types/wlr_scene.h>
#include <wlr/types/wlr_cursor.h>
#include <wlr/types/wlr_xcursor_manager.h>
#include <wlr/render/allocator.h>
#include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_subcompositor.h>
#include <wlr/types/wlr_data_device.h>
#include <wlr/types/wlr_output_layout.h>

#define LAYER_TREE_SZ 4
/* For brevity's sake, struct members are annotated where they are used. */
enum diyac_cursor_mode
{
    DIYAC_CURSOR_PASSTHROUGH,
    DIYAC_CURSOR_MOVE,
    DIYAC_CURSOR_RESIZE,
};

enum diyac_node_descriptor_type
{
    DIYAC_NODE_NONE = 0,
    DIYAC_NODE_VIEW,
    DIYAC_NODE_XDG_POPUP,
    DIYAC_NODE_LAYER_SURFACE,
    DIYAC_NODE_LAYER_POPUP,
    DIYAC_NODE_TREE,
    // DIYAC_NODE_MENUITEM,
    // LAB_NODE_TREE,
    // LAB_NODE_SSD_BUTTON,
};
enum diyac_view_state
{
    DIYAC_VIEW_NORMAL = 0,
    DIYAC_VIEW_MAXIMIZE,
    DIYAC_VIEW_MINIMIZE,
    DIYAC_VIEW_FULL_SCREEN,
};

struct diyac_seat
{
    struct wlr_seat *wlr_seat;
    struct diyac_server *server;

    struct wlr_cursor *cursor;
    enum diyac_cursor_mode cursor_mode;
    struct wlr_xcursor_manager *cursor_mgr;

    struct wlr_layer_surface_v1 *focused_layer;

    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 wl_listener new_input;
    struct wl_listener request_cursor;
    struct wl_listener request_set_selection;
    struct wl_list keyboards;
};

struct diyac_popup
{
    struct wlr_xdg_popup *wlr_popup;
    struct wlr_scene_tree *scene_tree;
    struct wl_listener commit;
    struct wl_listener destroy;
    struct wl_listener new_popup;
    struct wlr_box output_toplevel_sx_box;
    void *parent;
};

struct diyac_layer_scenes
{
    struct wlr_scene_tree *background;
    struct wlr_scene_tree *bottom;
    struct wlr_scene_tree *top;
    struct wlr_scene_tree *overlay;
    struct wlr_scene_tree *popup;
    struct wlr_scene_tree *session;
};

struct diyac_node_descriptor
{
    enum diyac_node_descriptor_type type;
    void *data;
    struct wl_listener destroy;
};

struct diyac_server
{
    struct wl_display *wl_display;
    struct wlr_backend *backend;
    struct wlr_renderer *renderer;
    struct wlr_allocator *allocator;
    struct wlr_scene *scene;
    struct wlr_scene_output_layout *scene_layout;

    struct wlr_xdg_shell *xdg_shell;
    struct wlr_layer_shell_v1 *layer_shell;
    struct wl_listener new_xdg_surface;
    struct wl_listener new_layer_surface;
    struct wl_list views;
    /*
     * Popups need to be rendered above always-on-top views, so we reparent
     * them to this dedicated tree
     */
    struct wlr_scene_tree *xdg_popup_tree;
    struct wlr_scene_tree *view_tree;

    struct diyac_seat seat;

    struct diyac_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;
};

struct diyac_layer_surface
{
    struct wlr_scene_layer_surface_v1 *scene_layer_surface;
    struct diyac_server *server;
    bool mapped;
    struct wl_listener map;
    struct wl_listener unmap;
    struct wl_listener surface_commit;
    struct wl_listener output_destroy;
    struct wl_listener node_destroy;
    struct wl_listener new_popup;
};

struct diyac_output
{
    struct wl_list link;
    struct diyac_server *server;
    struct wlr_output *wlr_output;
    struct wl_listener frame;
    struct wl_listener request_state;
    struct wl_listener destroy;
    struct wlr_box usable_area;

    // layer output
    struct diyac_layer_scenes scenes;
    // alias to diyac_layer_scenes elements
    struct wlr_scene_tree *layer_tree[LAYER_TREE_SZ];
};

struct diyac_view
{
    struct wl_list link;
    struct diyac_server *server;
    struct wlr_xdg_surface *xdg_surface;
    struct wlr_xdg_toplevel *xdg_toplevel;
    struct wlr_scene_tree *scene_tree;
    enum diyac_view_state state;
    /*
     * Geometry of the wlr_surface contained within the view, as
     * currently displayed. Should be kept in sync with the
     * scene-graph at all times.
     */
    struct wlr_box original;
    bool mapped;
    struct diyac_output *output;

    struct wl_listener map;
    struct wl_listener unmap;
    struct wl_listener destroy;
    struct wl_listener request_move;
    struct wl_listener request_resize;
    struct wl_listener request_minimize;
    struct wl_listener request_maximize;
    struct wl_listener request_fullscreen;

    struct wl_listener set_app_id;
    struct wl_listener new_popup;
};

struct diyac_keyboard
{
    struct wl_list link;
    struct diyac_server *server;
    struct wlr_keyboard *wlr_keyboard;

    struct wl_listener modifiers;
    struct wl_listener key;
    struct wl_listener destroy;
};

#endif