#include <game-carrier/server.h>

typedef void (GC_CORE_API *LogMessage)(
    GCT_INT level,
    GCT_PTR msg);

typedef struct logMessage {
    /* ... Some fields ... */
    LogMessage logMessage;
    /* ... Some fields ... */
}

#include <game-carrier/server.h>

#include <stdlib.h>
#include <string.h>

#define COOKIE_MAGIC  0xFACE

static struct core_api api;

struct connection_data {
    GCT_INTPTR handle;
    /* Another user data asociated with connection */
};

int is_good_connection(GCT_INT rport, GCT_CSTR rip, GCT_CSTR udata);

GC_ADAPTER_EVENT
int adapter_initialize(int id, struct core_api *core_api, const void *load_path)
{
    api = *core_api;
    return 0;
}

GC_ADAPTER_EVENT
GCT_INTPTR on_connect(
    GCT_INT app_id,
    GCT_INTPTR handle,
    GCT_INT pid,
    GCT_CSTR rip,
    GCT_INT rport,
    GCT_CSTR lip,
    GCT_INT lport,
    GCT_CSTR udata)
{
    /* Check if this connection can be accepted */
    if (!is_good_connection(rport, rip, udata)) {
        return GC_DROP_CONNECTION;
    }

    /* Allocate user data */
    struct connection_data * conn = malloc(sizeof(struct connection_data));
    if (conn == NULL) {
        return GC_DROP_CONNECTION;
    }

    /* Save connection handle */
    conn->handle = handle;

    /* Send greetings */
    const char * msg = "Hello!";
    int status = api.connectionAddMessage(handle, msg, strlen(msg), COOKIE_MAGIC);
    if (status != 0) {
        api.logMessage(GCL_ERR, "Failed to send message");
        return GC_DROP_CONNECTION;
    }

    /* Return user data */
    return (GCT_INTPTR)conn;
}

GC_ADAPTER_EVENT
void on_message_sent(
    GCT_INTPTR conn_user,
    GCT_INTPTR cookie,
    GCT_SIZE len,
    GCT_INT status)
{
    if (cookie != COOKIE_MAGIC) {
        api.logMessage(GCL_ERR, "Invalid cookie!");
        return;
    }
}