/*
 * This Source Code Form is subject to the terms of the Mozilla Public License,
 * v. 2.0. If a copy of the MPL was not distributed with this file, You can
 * obtain one at https://mozilla.org/MPL/2.0/.
 */

#include <stdbool.h>

#include <zephyr/init.h>
#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>
#include <zephyr/logging/log_backend.h>
#include <zephyr/logging/log_backend_net.h>
#include <zephyr/logging/log_ctrl.h>
#include <zephyr/logging/log_core.h>
#include <zephyr/net/conn_mgr_connectivity.h>

LOG_MODULE_REGISTER(syslog);

#define L4_EVENT_MASK (NET_EVENT_L4_CONNECTED | NET_EVENT_L4_DISCONNECTED)

struct net_mgmt_event_callback l4_cb;
static K_SEM_DEFINE(network_connected, 0, 1);

void l4_event_handler(
	struct net_mgmt_event_callback *cb,
	uint32_t event,
	struct net_if *iface)
{
	LOG_DBG("Executing L4 event handler");

	switch (event) {
	case NET_EVENT_L4_CONNECTED:
		k_sem_give(&network_connected);
		LOG_INF("Network connected");
		break;
	case NET_EVENT_L4_DISCONNECTED:
		LOG_INF("Network disconnected");
		break;
	default:
		break;
	}
}

int init_network_monitoring(void)
{
	net_mgmt_init_event_callback(&l4_cb, l4_event_handler, L4_EVENT_MASK);
	net_mgmt_add_event_callback(&l4_cb);

	return 0;
}
SYS_INIT(init_network_monitoring, APPLICATION, 0);

int init_syslog(void)
{
	LOG_DBG("Initializing syslog logging backend");

	LOG_DBG("Waiting for network ...");
	k_sem_take(&network_connected, K_FOREVER);

	LOG_DBG("Enabling syslog backend");
	const struct log_backend *backend = log_backend_net_get();
	if (log_backend_is_active(backend) == false) {
		/* flush log messages to ensure first syslog message is reproducible */
		while (log_process());
		log_backend_init(backend);
		log_backend_enable(backend, backend->cb->ctx, CONFIG_LOG_MAX_LEVEL);
		LOG_INF("Syslog backend enabled");
	} else {
		LOG_INF("Syslog backend was already enabled");
	}

	return 0;
}
SYS_INIT(init_syslog, APPLICATION, 50);