/*
 * lws-minimal-ws-server
 *
 * Written in 2010-2019 by Andy Green <andy@warmcat.com>
 *
 * This file is made available under the Creative Commons CC0 1.0
 * Universal Public Domain Dedication.
 *
 * This demonstrates the most minimal http server you can make with lws,
 * with an added websocket chat server.
 *
 * To keep it simple, it serves stuff in the subdirectory "./mount-origin" of
 * the directory it was started in.
 * You can change that by changing mount.origin.
 */

#include <libwebsockets.h>

enum {
	LWS_SW_D,
	LWS_SW_H,
	LWS_SW_S,
	LWS_SW_V,
	LWS_SW_HELP,
};

static const struct lws_switches switches[] = {
	[LWS_SW_D]	= { "-d",              "Debug logs (e.g. -d 15)" },
	[LWS_SW_H]	= { "-h",              "Strict Host Check / Help" },
	[LWS_SW_S]	= { "-s",              "Use TLS / https" },
	[LWS_SW_V]	= { "-v",              "Set retry and idle policy" },
	[LWS_SW_HELP]	= { "--help",		"Show this help information" },
};

#include <string.h>
#include <signal.h>

#define LWS_PLUGIN_STATIC
#include "protocol_lws_minimal.c"

static struct lws_protocols protocols[] = {
	{ "http", lws_callback_http_dummy, 0, 0, 0, NULL, 0},
	LWS_PLUGIN_PROTOCOL_MINIMAL,
	LWS_PROTOCOL_LIST_TERM
};

static const lws_retry_bo_t retry = {
	.secs_since_valid_ping = 3,
	.secs_since_valid_hangup = 10,
};

static int interrupted;

static const struct lws_http_mount mount = {
	.mountpoint		= "/",			/* mountpoint URL */
	.origin			= "./mount-origin",	/* serve from dir */
	.def			= "index.html",		/* default filename */
	.origin_protocol	= LWSMPRO_FILE,		/* files in a dir */
	.mountpoint_len		= 1,			/* char count */
};

#if defined(LWS_WITH_PLUGINS)
/* if plugins enabled, only protocols explicitly named in pvo bind to vhost */
static struct lws_protocol_vhost_options pvo = { NULL, NULL, "lws-minimal", "" };
#endif

void sigint_handler(int sig)
{
	interrupted = 1;
}

int main(int argc, const char **argv)
{
	struct lws_context_creation_info info;
	struct lws_context *context;
	int n = 0;
	(void)switches;

	if ((argc == 1) || lws_cmdline_option(argc, argv, switches[LWS_SW_HELP].sw)) {
		lws_switches_print_help(argv[0], switches, LWS_ARRAY_SIZE(switches));
		return 0;
	}


	signal(SIGINT, sigint_handler);


	lwsl_user("LWS minimal ws server | visit http://localhost:7681 (-s = use TLS / https)\n");

	lws_context_info_defaults(&info, NULL);
	lws_cmdline_option_handle_builtin(argc, argv, &info);
	info.port = 7681;
	info.mounts = &mount;
	info.protocols = protocols;
	info.vhost_name = "localhost";
#if defined(LWS_WITH_PLUGINS)
	info.pvo = &pvo;
#endif
	info.options =
		LWS_SERVER_OPTION_HTTP_HEADERS_SECURITY_BEST_PRACTICES_ENFORCE;

#if defined(LWS_WITH_TLS)
	if (lws_cmdline_option(argc, argv, switches[LWS_SW_S].sw)) {
		lwsl_user("Server using TLS\n");
		info.options |= LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
		info.ssl_cert_filepath = "localhost-100y.cert";
		info.ssl_private_key_filepath = "localhost-100y.key";
	}
#endif

	if (lws_cmdline_option(argc, argv, switches[LWS_SW_H].sw))
		info.options |= LWS_SERVER_OPTION_VHOST_UPG_STRICT_HOST_CHECK;

	if (lws_cmdline_option(argc, argv, switches[LWS_SW_V].sw))
		info.retry_and_idle_policy = &retry;

	context = lws_create_context(&info);
	if (!context) {
		lwsl_err("lws init failed\n");
		return 1;
	}

	while (n >= 0 && !interrupted)
		n = lws_service(context, 0);

	lws_context_destroy(context);

	return 0;
}
