/*
 * Copyright (c) 2018 Henrik Brix Andersen <henrik@brixandersen.dk>
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/types.h>
#include <stddef.h>
#include <misc/printk.h>
#include <misc/util.h>

#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>

#define DEVICE_NAME CONFIG_BT_DEVICE_NAME
#define DEVICE_NAME_LEN (sizeof(DEVICE_NAME) - 1)

#ifndef IBEACON_RSSI
#define IBEACON_RSSI 0xc8
#endif

/*
 * Set iBeacon demo advertisement data. These values are for
 * demonstration only and must be changed for production environments!
 *
 * UUID:  18ee1516-016b-4bec-ad96-bcb96d166e97
 * Major: 0
 * Minor: 0
 * RSSI:  -56 dBm
 */
static const struct bt_data ad[] = {
	BT_DATA_BYTES(BT_DATA_FLAGS, BT_LE_AD_NO_BREDR),
	BT_DATA_BYTES(BT_DATA_MANUFACTURER_DATA,
		      0x4c, 0x00, /* Apple */
		      0x02, 0x15, /* iBeacon */
		      0x18, 0xee, 0x15, 0x16, /* UUID[15..12] */
		      0x01, 0x6b, /* UUID[11..10] */
		      0x4b, 0xec, /* UUID[9..8] */
		      0xad, 0x96, /* UUID[7..6] */
		      0xbc, 0xb9, 0x6d, 0x16, 0x6e, 0x97, /* UUID[5..0] */
		      0x00, 0x00, /* Major */
		      0x00, 0x00, /* Minor */
		      IBEACON_RSSI) /* Calibrated RSSI @ 1m */
};

/* Set Scan Response data */
static const struct bt_data sd[] = {
	BT_DATA(BT_DATA_NAME_COMPLETE, DEVICE_NAME, DEVICE_NAME_LEN),
};

static void bt_ready(int err)
{
	if (err) {
		printk("Bluetooth init failed (err %d)\n", err);
		return;
	}

	printk("Bluetooth initialized\n");

	/* Start advertising */
	err = bt_le_adv_start(BT_LE_ADV_NCONN, ad, ARRAY_SIZE(ad),
			      sd, ARRAY_SIZE(sd));
	if (err) {
		printk("Advertising failed to start (err %d)\n", err);
		return;
	}

	printk("iBeacon started\n");
}

void main(void)
{
	int err;

	printk("Starting iBeacon Demo\n");

	/* Initialize the Bluetooth Subsystem */
	err = bt_enable(bt_ready);
	if (err) {
		printk("Bluetooth init failed (err %d)\n", err);
	}
}