#include "lvgl/lvgl.h"
#include "lvgl/demos/lv_demos.h"
#include <libdrm/drm.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
//#include "lv_drivers/display/drm.h"
#include "lv_drivers/indev/evdev.h"
#include <unistd.h>
#include <pthread.h>
#include <time.h>
#include <sys/time.h>
#define DISP_BUF_SIZE (128 * 1024)

//extern void drm_flush(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p);
int main(void)
{
    /*LittlevGL init*/
    lv_init();
    /*Linux frame buffer device init*/
    drm_init();
    /*A small buffer for LittlevGL to draw the screen's content*/
    static lv_color_t buf[DISP_BUF_SIZE];
    /*Initialize a descriptor for the buffer*/
    static lv_disp_draw_buf_t disp_buf;
    lv_disp_draw_buf_init(&disp_buf, buf, NULL, DISP_BUF_SIZE);
	
    /*Initialize and register a display driver*/
    static lv_disp_drv_t disp_drv;
    lv_disp_drv_init(&disp_drv);
    disp_drv.draw_buf   = &disp_buf;
    disp_drv.flush_cb   = drm_flush;
    disp_drv.hor_res    = 480;
    disp_drv.ver_res    = 272;
    lv_disp_drv_register(&disp_drv);

    evdev_init();
    static lv_indev_drv_t indev_drv_1;
    lv_indev_drv_init(&indev_drv_1); /*Basic initialization*/
    indev_drv_1.type = LV_INDEV_TYPE_POINTER;
    /*This function will be called periodically (by the library) to get the mouse position and state*
    indev_drv_1.read_cb = evdev_read;
    lv_indev_t *mouse_indev = lv_indev_drv_register(&indev_drv_1);

    /*Set a cursor for the mouse*/
    LV_IMG_DECLARE(mouse_cursor_icon)
    lv_obj_t * cursor_obj = lv_img_create(lv_scr_act()); /*Create an image object for the cursor */
    lv_img_set_src(cursor_obj, &mouse_cursor_icon);           /*Set the image source*/
    lv_indev_set_cursor(mouse_indev, cursor_obj);             /*Connect the image  object to the driver*/
 
    /*Create a Demo*/
    lv_demo_widgets();
	
    /*Handle LitlevGL tasks (tickless mode)*/
    while(1) {
        lv_timer_handler();
        usleep(5000);
    }
    return 0;
}
/*Set in lv_conf.h as `LV_TICK_CUSTOM_SYS_TIME_EXPR`*/
uint32_t custom_tick_get(void)
{
    static uint64_t start_ms = 0;
    if(start_ms == 0) {
        struct timeval tv_start;
        gettimeofday(&tv_start, NULL);
        start_ms = (tv_start.tv_sec * 1000000 + tv_start.tv_usec) / 1000;
    }
     struct timeval tv_now;
    gettimeofday(&tv_now, NULL);
    uint64_t now_ms;
    now_ms = (tv_now.tv_sec * 1000000 + tv_now.tv_usec) / 1000; 
    uint32_t time_ms = now_ms - start_ms;
    return time_ms;
}