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#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../states/iso15118_20_states.h"



size_t clientsend(int sock_fd, const char *outdata)
{
    return send(sock_fd, outdata, strlen(outdata), 0);
}

size_t clientrecv(int sock_fd, char *indata, size_t buflen)
{   
    size_t nbytes = recv(sock_fd, indata, buflen - 1, 0);
    if(nbytes > 0)
    {
        indata[nbytes] = '\n';
    }
    return nbytes;
}

void start_client()
{
    const char* host = "0.0.0.0";
    int port = 7000;

    int sock_fd;
    struct sockaddr_in serv_name;
    int status;
    char indata[1024] = {0}, outdata[1024] = {0};

    // create a socket
    sock_fd = socket(AF_INET, SOCK_STREAM, 0);
    if (sock_fd == -1) {
        perror("Socket creation error");
        exit(1);
    }

    // server address
    serv_name.sin_family = AF_INET;
    inet_aton(host, &serv_name.sin_addr);
    serv_name.sin_port = htons(port);

    status = connect(sock_fd, (struct sockaddr *)&serv_name, sizeof(serv_name));
    if (status == -1) {
        perror("Connection error");
        exit(1);
    }
    
    EVCCSessionSetup evccsessionsetup(nullptr,sock_fd);
    evccsessionsetup.process_message(nullptr);

    while (1) {

        printf("Please input message: ");
        memset(outdata, 0, sizeof(outdata));
        fgets(outdata,sizeof(outdata), stdin);
        printf("send: %s\n", outdata);
        clientsend(sock_fd,outdata);
        //send(sock_fd, outdata, strlen(outdata), 0);

        memset(indata, 0, sizeof(indata));
        size_t nbytes = clientrecv(sock_fd, indata, sizeof(indata));
        //recv(sock_fd, indata, sizeof(indata) - 1, 0);
        if (nbytes <= 0) {
            close(sock_fd);
            printf("server closed connection.\n");
            break;
        }
        indata[nbytes] = '\0';
        printf("recv: %s\n", indata);
    }

    //return 0;
}