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#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <strings.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/epoll.h>
#include <errno.h>
#include <sys/sysinfo.h>

#include "evloop.h"
#include "tsocket.h"
#include "util.h"
#include "acceptor.h"
#include "tpool.h"
#include "server.h"

struct server {
    tpool_t *tpool;
    evloop_t *evloop;
    evloop_t **subevloops;
    conn_acceptor_t *acceptor;
};

server_t *server_create(void)
{
    int nprocs = get_nprocs();
    server_t *serv = (server_t *)malloc(sizeof(*serv));
    tsocket_t *sock;
    conn_acceptor_t *acceptor;
    event_t *acceptor_event;

    if (!(sock = tsocket_create())
            || tsocket_bind(sock, "127.0.0.1", 8888) == -1
            || tsocket_listen(sock) == -1)
        panic("socket creation");

    serv = (server_t *)malloc(sizeof(*serv));
    if (!serv)
        return NULL;

    serv->tpool = tpool_create(nprocs);
    serv->evloop = evloop_create();
    serv->subevloops = calloc(nprocs, sizeof(evloop_t*));
    for (int i = 0; i < nprocs; i++)
        serv->subevloops[i] = evloop_create();

    serv->acceptor = conn_acceptor_create(sock, serv->subevloops, nprocs);

    if (!(acceptor_event = conn_acceptor_event_create(serv->acceptor)))
        return NULL;
    if (evloop_add(serv->evloop, acceptor_event, EPOLLIN) == -1)
        panic("evloop add fd");

    for (int i = 0; i < nprocs; i++)
        tpool_add_work(serv->tpool, (thread_func_t) evloop_loop,
                serv->subevloops[i]);

    return serv;
}

void server_destroy(server_t *serv)
{
    int nprocs = get_nprocs();

    if (!serv)
        return;

    evloop_destroy(serv->evloop);
    tpool_destroy(serv->tpool);
    conn_acceptor_destroy(serv->acceptor);

    for (int i = 0; i < nprocs; i++)
        evloop_destroy(serv->subevloops[i]);

    free(serv->subevloops);
    free(serv);
}

void server_on_connect(server_t *serv, connection_callback_func_t func)
{
    conn_acceptor_on_connect(serv->acceptor, func);
}

void server_run(server_t *serv)
{
    evloop_loop(serv->evloop);
}