/**
 * @file lv_disp.h
 *
 */

#ifndef LV_DISP_H
#define LV_DISP_H

#ifdef __cplusplus
extern "C" {
#endif

/*********************
 *      INCLUDES
 *********************/
#include "../hal/lv_hal.h"
#include "lv_obj.h"
#include "lv_theme.h"

/*********************
 *      DEFINES
 *********************/

/**********************
 *      TYPEDEFS
 **********************/

typedef enum {
    LV_SCR_LOAD_ANIM_NONE,
    LV_SCR_LOAD_ANIM_OVER_LEFT,
    LV_SCR_LOAD_ANIM_OVER_RIGHT,
    LV_SCR_LOAD_ANIM_OVER_TOP,
    LV_SCR_LOAD_ANIM_OVER_BOTTOM,
    LV_SCR_LOAD_ANIM_MOVE_LEFT,
    LV_SCR_LOAD_ANIM_MOVE_RIGHT,
    LV_SCR_LOAD_ANIM_MOVE_TOP,
    LV_SCR_LOAD_ANIM_MOVE_BOTTOM,
    LV_SCR_LOAD_ANIM_FADE_ON,
} lv_scr_load_anim_t;

/**********************
 * GLOBAL PROTOTYPES
 **********************/

/**
 * Return with a pointer to the active screen
 * @param disp pointer to display which active screen should be get. (NULL to use the default
 * screen)
 * @return pointer to the active screen object (loaded by 'lv_scr_load()')
 */
lv_obj_t * lv_disp_get_scr_act(lv_disp_t * disp);

/**
 * Return with a pointer to the previous screen. Only used during screen transitions.
 * @param disp pointer to display which previous screen should be get. (NULL to use the default
 * screen)
 * @return pointer to the previous screen object or NULL if not used now
 */
lv_obj_t * lv_disp_get_scr_prev(lv_disp_t * disp);

/**
 * Make a screen active
 * @param scr pointer to a screen
 */
void lv_disp_load_scr(lv_obj_t * scr);

/**
 * Return with the top layer. (Same on every screen and it is above the normal screen layer)
 * @param disp pointer to display which top layer should be get. (NULL to use the default screen)
 * @return pointer to the top layer object (transparent screen sized lv_obj)
 */
lv_obj_t * lv_disp_get_layer_top(lv_disp_t * disp);

/**
 * Return with the sys. layer. (Same on every screen and it is above the normal screen and the top
 * layer)
 * @param disp pointer to display which sys. layer should be retrieved. (NULL to use the default screen)
 * @return pointer to the sys layer object (transparent screen sized lv_obj)
 */
lv_obj_t * lv_disp_get_layer_sys(lv_disp_t * disp);

/**
 * Set the theme of a display
 * @param disp pointer to a display
 */
void lv_disp_set_theme(lv_disp_t * disp, lv_theme_t * th);

/**
 * Get the theme of a display
 * @param disp pointer to a display
 * @return the display's theme (can be NULL)
 */
lv_theme_t * lv_disp_get_theme(lv_disp_t * disp);

/**
 * Set the background color of a display
 * @param disp pointer to a display
 * @param color color of the background
 */
void lv_disp_set_bg_color(lv_disp_t * disp, lv_color_t color);

/**
 * Set the background image of a display
 * @param disp pointer to a display
 * @param img_src path to file or pointer to an `lv_img_dsc_t` variable
 */
void lv_disp_set_bg_image(lv_disp_t * disp, const void  * img_src);

/**
 * Set opacity of the background
 * @param disp pointer to a display
 * @param opa opacity (0..255)
 */
void lv_disp_set_bg_opa(lv_disp_t * disp, lv_opa_t opa);

/**
 * Switch screen with animation
 * @param scr pointer to the new screen to load
 * @param anim_type type of the animation from `lv_scr_load_anim_t`. E.g.  `LV_SCR_LOAD_ANIM_MOVE_LEFT`
 * @param time time of the animation
 * @param delay delay before the transition
 * @param auto_del true: automatically delete the old screen
 */
void lv_scr_load_anim(lv_obj_t * scr, lv_scr_load_anim_t anim_type, uint32_t time, uint32_t delay, bool auto_del);

/**
 * Get elapsed time since last user activity on a display (e.g. click)
 * @param disp pointer to a display (NULL to get the overall smallest inactivity)
 * @return elapsed ticks (milliseconds) since the last activity
 */
uint32_t lv_disp_get_inactive_time(const lv_disp_t * disp);

/**
 * Manually trigger an activity on a display
 * @param disp pointer to a display (NULL to use the default display)
 */
void lv_disp_trig_activity(lv_disp_t * disp);

/**
 * Clean any CPU cache that is related to the display.
 * @param disp pointer to a display (NULL to use the default display)
 */
void lv_disp_clean_dcache(lv_disp_t * disp);

/**
 * Get a pointer to the screen refresher timer to
 * modify its parameters with `lv_timer_...` functions.
 * @param disp pointer to a display
 * @return pointer to the display refresher timer. (NULL on error)
 */
lv_timer_t * _lv_disp_get_refr_timer(lv_disp_t * disp);

/*------------------------------------------------
 * To improve backward compatibility
 * Recommended only if you have one display
 *------------------------------------------------*/

/**
 * Get the active screen of the default display
 * @return pointer to the active screen
 */
static inline lv_obj_t * lv_scr_act(void)
{
    return lv_disp_get_scr_act(lv_disp_get_default());
}

/**
 * Get the top layer  of the default display
 * @return pointer to the top layer
 */
static inline lv_obj_t * lv_layer_top(void)
{
    return lv_disp_get_layer_top(lv_disp_get_default());
}

/**
 * Get the active screen of the default display
 * @return  pointer to the sys layer
 */
static inline lv_obj_t * lv_layer_sys(void)
{
    return lv_disp_get_layer_sys(lv_disp_get_default());
}

static inline void lv_scr_load(lv_obj_t * scr)
{
    lv_disp_load_scr(scr);
}

/**********************
 *      MACROS
 **********************/

/*------------------------------------------------
 * To improve backward compatibility
 * Recommended only if you have one display
 *------------------------------------------------*/

#ifndef LV_HOR_RES
/**
 * The horizontal resolution of the currently active display.
 */
#define LV_HOR_RES lv_disp_get_hor_res(lv_disp_get_default())
#endif

#ifndef LV_VER_RES
/**
 * The vertical resolution of the currently active display.
 */
#define LV_VER_RES lv_disp_get_ver_res(lv_disp_get_default())
#endif

/**
 * Scale the given number of pixels (a distance or size) relative to a 160 DPI display
 * considering the DPI of the default display.
 * It ensures that e.g. `lv_dpx(100)` will have the same physical size regardless to the
 * DPI of the display.
 * @param n     the number of pixels to scale
 * @return      `n x current_dpi/160`
 */
static inline lv_coord_t lv_dpx(lv_coord_t n)
{
    return LV_DPX(n);
}

/**
 * Scale the given number of pixels (a distance or size) relative to a 160 DPI display
 * considering the DPI of the given display.
 * It ensures that e.g. `lv_dpx(100)` will have the same physical size regardless to the
 * DPI of the display.
 * @param obj   a display whose dpi should be considered
 * @param n     the number of pixels to scale
 * @return      `n x current_dpi/160`
 */
static inline lv_coord_t lv_disp_dpx(const lv_disp_t * disp, lv_coord_t n)
{
    return _LV_DPX_CALC(lv_disp_get_dpi(disp), n);
}

#ifdef __cplusplus
} /*extern "C"*/
#endif

#endif /*LV_DISP_H*/
