#include "rtthread.h"
#include "bf0_hal.h"
#include "drv_io.h"
#include "littlevgl2rtt.h"
#include "lv_examples.h"
#include "lvgl.h"
#include "lvgl_private.h"

lv_obj_t *l;
int i = 0;
lv_font_t *font[21] = {
    &lv_font_montserrat_8,
    &lv_font_montserrat_10,
    &lv_font_montserrat_12,
    &lv_font_montserrat_14,
    &lv_font_montserrat_16,
    &lv_font_montserrat_18,
    &lv_font_montserrat_20,
    &lv_font_montserrat_22,
    &lv_font_montserrat_24,
    &lv_font_montserrat_26,
    &lv_font_montserrat_28,
    &lv_font_montserrat_30,
    &lv_font_montserrat_32,
    &lv_font_montserrat_34,
    &lv_font_montserrat_36,
    &lv_font_montserrat_38,
    &lv_font_montserrat_40,
    &lv_font_montserrat_42,
    &lv_font_montserrat_44,
    &lv_font_montserrat_46,
    &lv_font_montserrat_48};

static void _set_opa_layered_cb(void *var, int32_t v)
{
    lv_obj_set_style_opa_layered((lv_obj_t *)var, (lv_opa_t)v, 0);
}

static void _btn_switch_font_cb(lv_event_t *e)
{
    if (i >= 21) {
        i = 0; 
    }
    
    rt_kprintf("Switch font callback - Current index: %d\n", i);
    
    // 立即卡死：i = 8 12 15 16 18 20 21
    // 透明后才卡死：i = 17 19 
    lv_obj_set_style_text_font(l, font[i], 0);
    lv_label_set_text_fmt(l, "Hello, font index %d", i);
    lv_anim_t anim;
    lv_anim_t *a = &anim;
    lv_anim_init(a);
    lv_anim_set_var(a, l);
    lv_anim_set_values(a, LV_OPA_100, LV_OPA_20);
    lv_anim_set_exec_cb(a, _set_opa_layered_cb);
    lv_anim_set_path_cb(a, lv_anim_path_ease_in_out);
    lv_anim_set_duration(a, 1000);
    lv_anim_set_delay(a, 0);
    lv_anim_start(a);
    i++;
}

static void _btn_skip_font_cb(lv_event_t *e)
{
    if (i >= 21) {
        i = 0; 
    }
    
    rt_kprintf("Skip font callback - Current index: %d\n", i);

    lv_obj_set_style_text_font(l, font[i], 0);
    lv_label_set_text_fmt(l, "Hello, font index %d", i);
    i++;
}

/**
 * @brief  Main program
 * @param  None
 * @retval 0 if success, otherwise failure number
 */
int main(void)
{
    rt_err_t ret = RT_EOK;
    rt_uint32_t ms;

    /* init littlevGL */
    ret = littlevgl2rtt_init("lcd");
    if (ret != RT_EOK)
    {
        return ret;
    }

    lv_obj_t *scr = lv_screen_active();

    l = lv_label_create(scr);
    lv_label_set_text(l, "Hello World");

    lv_obj_set_pos(l, -50, 100);

    lv_obj_t *btn = lv_button_create(scr);
    lv_obj_set_size(btn, 100, 100);
    lv_obj_center(btn);
    lv_obj_add_event_cb(btn, _btn_switch_font_cb, LV_EVENT_CLICKED, NULL);

    btn = lv_button_create(scr);
    lv_obj_set_size(btn, 100, 100);
    lv_obj_align(btn,LV_ALIGN_BOTTOM_MID,0,0);
    lv_obj_add_event_cb(btn, _btn_skip_font_cb, LV_EVENT_CLICKED, NULL);

    while (1)
    {
        ms = lv_task_handler();
        rt_thread_mdelay(ms);
    }
    return RT_EOK;
}