/*
 * Copyright (c) 2011, Jason Ish
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "server.h"

/**
 * global variables
 * */
server_config_t g_srv_conf;
zlog_category_t *g_zc;

int
main(int argc, char *argv[])
{
    /** 屏蔽信号 */
    //signal_setup();

    /** 解析主配置文件 */
    parse_server_config();

    /** 初始化日志 */
    init_global_zlog();

    /** 以守护进程工作,不写日志了, #bug */
    if (0 != g_srv_conf.daemon)
    {
        //daemonize(0, 1);
    }

    /** 启动服务 */
    int listen_fd;
    struct sockaddr_in listen_addr;
    int reuseaddr_on = 1;

    /* The socket accept event. */
    struct event ev_accept;

    /* Initialize libevent. */
    zlog_debug(g_zc, "初始化 libevent");
    event_init();

    /* Create our listening socket. This is largely boiler plate
     * code that I'll abstract away in the future. */
    listen_fd = socket(AF_INET, SOCK_STREAM, 0);
    if (listen_fd < 0)
        err(1, "listen failed");
    if (setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr_on,
        sizeof(reuseaddr_on)) == -1) {
        err(1, "setsockopt failed");
    }
    zlog_debug(g_zc, "创建 socket 成功");

    memset(&listen_addr, 0, sizeof(listen_addr));
    listen_addr.sin_family = AF_INET;
    listen_addr.sin_addr.s_addr = INADDR_ANY;
    listen_addr.sin_port = htons(SERVER_PORT);

    if (bind(listen_fd, (struct sockaddr *)&listen_addr,
        sizeof(listen_addr)) < 0)
        err(1, "bind failed");
    if (listen(listen_fd, 5) < 0)
        err(1, "listen failed");
    zlog_debug(g_zc, "bind 端口成功");

    /* Set the socket to non-blocking, this is essential in event
     * based programming with libevent. */
    if (setnonblock(listen_fd) < 0)
        err(1, "failed to set server socket to non-blocking");

    /* We now have a listening socket, we create a read event to
     * be notified when a client connects. */
    event_set(&ev_accept, listen_fd, EV_READ|EV_PERSIST, on_accept, NULL);
    event_add(&ev_accept, NULL);
    zlog_debug(g_zc, "libevent 初始化完成");

    /* Start the libevent event loop. */
    event_dispatch();

    /** 销毁日志句柄 */
    zlog_fini();

    return 0;
}