/**
 * 该文件用于匹配fw.html
 * 使用该.c文件可实现从名为router的数据库中
 * 实现获取前端页面输入的ip地址
 * 对存有黑名单数据的ip_fw表进行写入或删除操作
 */

#include <cjson/cJSON.h>
#include <mysql/mysql.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main() {
    MYSQL *conn;
    MYSQL_RES *res;
    MYSQL_ROW row;

    conn = mysql_init(NULL);
    if (conn == NULL) {
        fprintf(stderr, "mysql_init() failed\n");
        exit(1);
    }

    if (mysql_real_connect(conn, "localhost", "root", "root", "router", 3306,
                           NULL, 0) == NULL) {
        fprintf(stderr, "mysql_real_connect() failed\n");
        mysql_close(conn);
        exit(1);
    }

    // 获取前端传递的JSON数据
    char request_data[128] = "";
    fgets(request_data, 128, stdin);

    // 解析JSON数据
    cJSON *p = cJSON_Parse(request_data);
    cJSON *code = cJSON_GetObjectItemCaseSensitive(p, "code");
    cJSON *ip = cJSON_GetObjectItemCaseSensitive(p, "ip");

    if (!cJSON_IsNumber(code) || !cJSON_IsString(ip)) {
        fprintf(stderr, "Error getting code or IP address from JSON data\n");
        cJSON_Delete(p);
        mysql_close(conn);
        exit(1);
    }

    int operation_code = code->valueint;
    char *ip_address = ip->valuestring;

    if (operation_code == 0) {
        // 插入IP地址到数据库
        char query[1000];
        sprintf(query, "INSERT INTO ip_fw (ip) VALUES ('%s')", ip_address);

        if (mysql_query(conn, query)) {
            fprintf(stderr, "INSERT query failed. Error: %s\n",
                    mysql_error(conn));
            cJSON_Delete(p);
            mysql_close(conn);
            exit(1);
        }
    } else if (operation_code == 1) {
        // 从数据库中删除指定IP地址
        char query[1000];
        sprintf(query, "DELETE FROM ip_fw WHERE ip='%s'", ip_address);

        if (mysql_query(conn, query)) {
            fprintf(stderr, "DELETE query failed. Error: %s\n",
                    mysql_error(conn));
            cJSON_Delete(p);
            mysql_close(conn);
            exit(1);
        }
    } else {
        fprintf(stderr, "Invalid operation code\n");
        cJSON_Delete(p);
        mysql_close(conn);
        exit(1);
    }

    cJSON_Delete(p);

    printf("Content-Type: application/json;charset=utf-8\r\n");
    printf("\r\n");
    printf("{\"status\": \"success\"}");

    mysql_close(conn);

    return 0;
}