/*
 * Copyright (c) 2024 Martin Stumpf <finomnis@gmail.com>
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include <zephyr/drivers/display.h>

#include <lvgl.h>
#include <stdio.h>
#include <string.h>
#include <zephyr/kernel.h>

#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(app, CONFIG_LOG_DEFAULT_LEVEL);

static void initialize_gui(void)
{
	lv_obj_t *label;

	/* Configure screen and background for transparency */
	lv_obj_set_style_bg_opa(lv_screen_active(), LV_OPA_TRANSP, LV_PART_MAIN);
	lv_obj_set_style_bg_opa(lv_layer_bottom(), LV_OPA_TRANSP, LV_PART_MAIN);

	/* Create a label, set its text and align it to the center */
	label = lv_label_create(lv_screen_active());
	lv_label_set_text(label, "Hello, world!");
	lv_obj_set_style_text_color(label, lv_color_hex(0xff00ff), LV_PART_MAIN);
	lv_obj_align(label, LV_ALIGN_CENTER, 0, -20);
	label = lv_label_create(lv_screen_active());
	lv_label_set_text(label, "RED");
	lv_obj_set_style_text_color(label, lv_color_hex(0xff0000), LV_PART_MAIN);
	lv_obj_align(label, LV_ALIGN_CENTER, -70, 20);
	label = lv_label_create(lv_screen_active());
	lv_label_set_text(label, "GREEN");
	lv_obj_set_style_text_color(label, lv_color_hex(0x00ff00), LV_PART_MAIN);
	lv_obj_align(label, LV_ALIGN_CENTER, 0, 20);
	label = lv_label_create(lv_screen_active());
	lv_label_set_text(label, "BLUE");
	lv_obj_set_style_text_color(label, lv_color_hex(0x0000ff), LV_PART_MAIN);
	lv_obj_align(label, LV_ALIGN_CENTER, 70, 20);
}

int main(void)
{
	const struct device *display_dev;
	int ret;

	display_dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_display));
	if (!device_is_ready(display_dev)) {
		LOG_ERR("Device not ready, aborting test");
		return -ENODEV;
	}

	initialize_gui();

	lv_timer_handler();
	ret = display_blanking_off(display_dev);
	if (ret < 0 && ret != -ENOSYS) {
		LOG_ERR("Failed to turn blanking off (error %d)", ret);
		return 0;
	}

	while (1) {
		uint32_t sleep_ms = lv_timer_handler();

		k_msleep(MIN(sleep_ms, INT32_MAX));
	}

	return 0;
}