#include <stdio.h>
#include <stdlib.h>
#include <libwebsockets.h>


static int callback_http(struct lws *wsi,
                         enum lws_callback_reasons reason, void *user,
                         void *in, size_t len)
{
	return 0;
}



static int callback_dumb_increment(struct lws *wsi,
                                   enum lws_callback_reasons reason,
                                   void *user, void *in, size_t len)
{
    switch (reason) {
        case LWS_CALLBACK_ESTABLISHED: 
            printf("connection etablie\n");
            break;
        case LWS_CALLBACK_RECEIVE: {
            //creation d'un buffer pour receptionner les messages ICMP/ethernet/etc
            unsigned char *buf = (unsigned char*) malloc(LWS_SEND_BUFFER_PRE_PADDING + len + LWS_SEND_BUFFER_POST_PADDING);
            
            int i;
            for (i=0; i < len; i++) {
                buf[LWS_SEND_BUFFER_PRE_PADDING + i ] = ((char *) in)[i];
            }
            
            // log what we recieved and what we're going to send as a response.
            printf("received data: %s, replying: %.*s\n", (char *) in, (int) len,
                   buf + LWS_SEND_BUFFER_PRE_PADDING);
            
            //lws_write(wsi, &buf[LWS_SEND_BUFFER_PRE_PADDING], len, LWS_WRITE_TEXT);
            
            free(buf);
            break;
        }
        default:
            break;
    }
    
    return 0;
}



static struct lws_protocols protocols[] = {
    {"http-only",callback_http,0},
    {"dumb-increment-protocol",callback_dumb_increment,0},
    {NULL, NULL, 0}
};

int main(void) {
    int port = 9800;
    struct lws_context *context;
    struct lws_context_creation_info context_info =
    {
        .port = port, .iface = NULL, .protocols = protocols, .extensions = NULL,
        .ssl_cert_filepath = NULL, .ssl_private_key_filepath = NULL, .ssl_ca_filepath = NULL,
        .gid = -1, .uid = -1, .options = 0, NULL, .ka_time = 0, .ka_probes = 0, .ka_interval = 0
    };

    context = lws_create_context(&context_info);
    if (context == NULL) {
        fprintf(stderr, "lws init failed\n");
        return -1;
    }
   
    printf("starting server...\n");
    while (1) {lws_service(context, 50);}
    lws_context_destroy(context);
    return 0;
}