#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "strings.h"
#include "mfshell.h"
#include "private.h"
#include "command.h"
#include "console.h"

static char*
_get_login_from_user(void);

static char*
_get_passwd_from_user(void);

int
mfshell_cmd_auth(mfshell_t *mfshell)
{
    int retval;

    if(mfshell == NULL) return -1;
    if(mfshell->server == NULL) return -1;

    // free and invalidate existing user name
    if(mfshell->user != NULL)
    {
        free(mfshell->user);
        mfshell->user = NULL;
    }

    // free and invalidate existing passwd
    if(mfshell->passwd != NULL)
    {
        free(mfshell->passwd);
        mfshell->passwd = NULL;
    }

    mfshell->user = _get_login_from_user();
    mfshell->passwd = _get_passwd_from_user();

    if(mfshell->user == NULL || mfshell->passwd == NULL) return -1;

    retval = mfshell->get_session_token(mfshell);

    if(retval == 0)
        printf("\n\rAuthentication SUCCESS\n\r");
    else
        printf("\n\rAuthentication FAILURE\n\r");

    return retval;
}

char*
_get_login_from_user(void)
{
    char        *login = NULL;
    size_t      len;
    ssize_t     bytes_read;

    printf("login: ");
    bytes_read = getline(&login,&len,stdin);
    string_chomp(login);

    if(bytes_read < 3)
    {
        if(login != NULL)
        {
            free(login);
            login = NULL;
        }
    }

    return login;
}

char*
_get_passwd_from_user(void)
{
    char        *passwd = NULL;
    size_t      len;
    ssize_t     bytes_read;

    printf("passwd: ");

    // disable screen echo
    console_save_state();
    console_echo_off();

    bytes_read = getline(&passwd,&len,stdin);
    string_chomp(passwd);

    // re-enable screen echo
    console_restore_state();

    if(bytes_read < 3)
    {
        if(passwd != NULL)
        {
            free(passwd);
            passwd = NULL;
        }
    }

    return passwd;
}