/**
 * @file uidemo.h
 * @brief Shared constants and types for the UI demo.
 *
 * There is deliberately little here: the demo is one translation unit, and
 * this header exists so the chapter can quote the constants and the script
 * type without quoting the code around them.
 */

#ifndef _UIDEMO_H_
#define _UIDEMO_H_

#include <SDL3/SDL.h>

/** @brief Window and layout width, in pixels. */
#define UIDEMO_SCREEN_WIDTH   "640"
/** @brief Window and layout height, in pixels. */
#define UIDEMO_SCREEN_HEIGHT  "480"
/** @brief The same width as a number, for akgl_ui_init. */
#define UIDEMO_WIDTH          640
/** @brief The same height as a number. */
#define UIDEMO_HEIGHT         480

/** @brief Registry name the demo's one font is loaded under. */
#define UIDEMO_FONT_NAME      "uidemo"
/** @brief Point size the font is loaded at. The size is baked into the handle. */
#define UIDEMO_FONT_SIZE      16

/**
 * @brief Which screen the demo is on.
 *
 * Three states, three ways of building an interface: the title screen is the
 * menu *widget*, the options screen is raw `CLAY()` layout, and the play
 * screen is the label and dialog widgets over a moving world stand-in.
 */
typedef enum {
    UIDEMO_STATE_TITLE,     /**< The akgl_UiMenu title menu. */
    UIDEMO_STATE_OPTIONS,   /**< The hand-written CLAY() options panel. */
    UIDEMO_STATE_PLAY       /**< HUD labels and a dialog over the "game". */
} uidemo_State;

/**
 * @brief One scripted input in a `--demo` run.
 *
 * Key steps carry a keycode; mouse steps carry a position. Every step is
 * synthesized as a real SDL_Event and pushed through the same routing the
 * interactive loop uses, so the demo exercises the event chain rather than
 * poking state behind its back.
 */
typedef struct {
    long frame;             /**< The frame this step fires on. */
    uint32_t type;          /**< SDL_EVENT_KEY_DOWN, _MOUSE_MOTION, _MOUSE_BUTTON_DOWN or _MOUSE_BUTTON_UP. */
    SDL_Keycode key;        /**< For key steps. */
    float x;                /**< For mouse steps. */
    float y;                /**< For mouse steps. */
} uidemo_ScriptStep;

#endif // _UIDEMO_H_