#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <3ds.h>
#include "lvgl.h"
#include "lv_ctr_disp.h"
#include "lv_ctr_indev.h"


static lv_obj_t * cursor;
static lv_obj_t * label;
static lv_obj_t * label2;


long unsigned int sys_tick(void)
{
    long unsigned int tick = (long unsigned int)osGetTime();
    return tick;
}

void sys_init(void)
{
    gfxInitDefault();
    consoleInit(GFX_TOP, NULL);
}

void sys_free(void)
{
    gfxExit();
}

static void cursor_timer_cb(lv_timer_t * t)
{
    LV_UNUSED(t);

    lv_indev_t * indev = lv_indev_get_next(NULL);

    if (!indev)
        return;

    lv_point_t p;
    lv_indev_get_point(indev, &p);

    if (lv_indev_get_state(indev) == LV_INDEV_STATE_PRESSED) {

        lv_obj_set_pos(cursor, p.x - 5, p.y - 5);
        lv_obj_clear_flag(cursor, LV_OBJ_FLAG_HIDDEN);

        lv_label_set_text_fmt(label2,
            "x: %d\ny: %d",
            p.x,
            p.y);
    }
    else {
        lv_obj_add_flag(cursor, LV_OBJ_FLAG_HIDDEN);
    }
}

int main(int argc, char* argv[])
{
    sys_init();
    lv_init();
    lv_ctr_disp_init();
    lv_ctr_indev_init();
    lv_tick_set_cb(sys_tick);

    label = lv_label_create(lv_screen_active());
    lv_label_set_text(label, "Hello world");
    lv_obj_center(label);
    
    /* Cursor */
    cursor = lv_obj_create(lv_screen_active());
    lv_obj_set_size(cursor, 10, 10);
    lv_obj_set_style_radius(cursor, LV_RADIUS_CIRCLE, 0);
    lv_obj_set_style_bg_color(cursor, lv_palette_main(LV_PALETTE_RED), 0);
    lv_obj_set_style_border_width(cursor, 0, 0);

    /* Coord label */
    label2 = lv_label_create(lv_screen_active());
    lv_obj_align(label2, LV_ALIGN_TOP_LEFT, 4, 4);
    
    /* Main loop UI update timer */
    lv_timer_create(cursor_timer_cb, 16, NULL);
    
    lv_obj_invalidate(lv_screen_active());

    // Main loop
    while (aptMainLoop())
    {
        lv_timer_handler();

        hidScanInput();

        u32 kDown = hidKeysDown();
        if (kDown & KEY_START)
            break; // break in order to return to hbmenu
    }

    sys_free();
    return 0;
}