#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <bits/fcntl-linux.h>
#include <errno.h>

#include "tools/log/log.h"
#include "http_rel.h"
#include <netinet/in.h>

/* 接收状态辅助结构 */

const char *http_get_body(const char *buf);
char *recv_http_request(int cfd);

/* http_get_body 无需修改，保持原样 */
const char *http_get_body(const char *buf)
{
    if (!buf) return NULL;
    const char *sep = strstr(buf, "\r\n\r\n");
    if (!sep) return NULL;
    const char *body = sep + 4;
    if (*body == '\0') return NULL;
    return body;
}

/**
 * @brief 初始化HTTP监听socket，所有错误通过logmanager记录
 * @param port 监听端口
 * @param logger 日志管理器实例指针
 * @return 成功返回监听fd，失败返回-1并记录日志
 */
int init_http_network(int port, log_manager *logger)
{
    logs *log;
    int fd;

    /* 1. 创建socket */
    fd = socket(AF_INET, SOCK_STREAM, 0);
    if (fd == -1) {
        log = malloc(sizeof(logs));
        // cppcheck-suppress uninitdata
        snprintf(log->log, sizeof(log->log), 
                 "[FATAL] socket() failed: %s", strerror(errno));
        logger->in_log(log, logger);
        return -1;
    }

    /* 2. 设置SO_REUSEADDR，避免TIME_WAIT状态导致bind失败 */
    int opt = 1;
    if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1) {
        log = malloc(sizeof(logs));
        snprintf(log->log, sizeof(log->log), 
                 "[ERROR] setsockopt(SO_REUSEADDR) on fd=%d failed: %s", 
                 fd, strerror(errno));
        logger->in_log(log, logger);
        close(fd);
        return -1;
    }

    /* 3. 设置为非阻塞模式（配合epoll使用） */
    int flags = fcntl(fd, F_GETFL, 0);
    if (flags == -1) {
        log = malloc(sizeof(logs));
        snprintf(log->log, sizeof(log->log), 
                 "[ERROR] fcntl(F_GETFL) on fd=%d failed: %s", fd, strerror(errno));
        logger->in_log(log, logger);

        close(fd);
        return -1;
    }
    if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) {
        log = malloc(sizeof(logs));
        snprintf(log->log, sizeof(log->log), 
                 "[ERROR] fcntl(O_NONBLOCK) on fd=%d failed: %s", fd, strerror(errno));
        logger->in_log(log, logger);
        close(fd);
        return -1;
    }

    /* 4. 绑定到指定端口 */
    struct sockaddr_in addr = {0};
    addr.sin_family = AF_INET;
    addr.sin_port = htons(port);
    addr.sin_addr.s_addr = htonl(INADDR_ANY);  // 监听所有网卡
    
    if (bind(fd, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
        log = malloc(sizeof(logs));
        snprintf(log->log, sizeof(log->log), 
                 "[FATAL] bind(port %d) failed: %s (fd=%d)", 
                 port, strerror(errno), fd);
        logger->in_log(log, logger);
        close(fd);
        return -1;
    }

    /* 5. 开始监听 */
    if (listen(fd, 10) == -1) {
        log = malloc(sizeof(logs));
        snprintf(log->log, sizeof(log->log), 
                 "[FATAL] listen(fd=%d, backlog=10) failed: %s", 
                 fd, strerror(errno));
        logger->in_log(log, logger);
        close(fd);
        return -1;
    }

    /* 6. 成功日志 */
    log = malloc(sizeof(logs));
    snprintf(log->log, sizeof(log->log), 
             "[HTTP] Successfully listening on port %d (fd=%d)", port, fd);
    logger->in_log(log, logger);
    return fd;
}