#include <stdio.h>
#include <netdb.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#define MAX 80
#define PORT 8080
#define SA struct sockaddr

int func(int sockfd){
    char recvBuff[20];
    int n;
    write(sockfd,"Hello, my name is lambda. Who are you?\n",39);
    //FILE * f = fopen("log3.txt","a+");
    /*
    n = recv(sockfd, recvBuff, 20,0);
    if (n<0)
        return 0;
    //printf("%d\n",strcmp(recvBuff,"ha"));
    FILE * f = fopen("log3.txt","a+");
    fputs(recvBuff,f);
    fclose(f);
    if (strcmp(recvBuff,"ha\n")!=0){
        write(sockfd,"Oh, sorry, no...\n",17);
        return 0;
    }
    write(sockfd,"Ready\n",6);*/
    n = recv(sockfd, recvBuff, 200,0);
    //fputs(recvBuff,f);
    //fclose(f);
    printf("%d\n",n);
}
int main()
{
    int sockfd, connfd, len;
    struct sockaddr_in servaddr, cli;

    // socket create and verification
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &(int){1}, sizeof(int));
    if (sockfd == -1) {
        printf("socket creation failed...\n");
        exit(0);
    }
    else
        printf("Socket successfully created..\n");
    bzero(&servaddr, sizeof(servaddr));

    // assign IP, PORT
    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
    servaddr.sin_port = htons(31337);

    // Binding newly created socket to given IP and verification
    if ((bind(sockfd, (SA*)&servaddr, sizeof(servaddr))) != 0) {
        printf("socket bind failed...\n");
        exit(0);
    }
    else
        printf("Socket successfully binded..\n");

    // Now server is ready to listen and verification
    if ((listen(sockfd, 5)) != 0) {
        printf("Listen failed...\n");
        exit(0);
    }
    else
        printf("Server listening..\n");
    len = sizeof(cli);

    // Accept the data packet from client and verification
    while (1){
        connfd = accept(sockfd, (SA*)&cli, &len);

        if (connfd < 0) {
            printf("server acccept failed...\n");
            exit(0);
        }
        else
            printf("server acccept the client...\n");

        if (fork() ==0){
            func(connfd);
            close(connfd);
        }
    }
    close(sockfd);
}