#include <cstring>
#include <pwd.h>
#include <cstdio>
#include <sys/stat.h>

#include "token.h"
#include "test_util.h"

const char *fake_user = "";
const char *fake_user_token = "";

// all the fake system calls
const char *fake_home_dir = "";
int fake_getpwnam_r(const char *nam, struct passwd *pwd, char *buffer, size_t bufsize, struct passwd **result) {
  strcpy(buffer, fake_home_dir);
  pwd->pw_dir = buffer;
  int ok = !strcmp(nam, fake_user);
  *result = ok ? pwd : 0;
  return !ok;
}


const char *fake_stat_path = "";
int fake_stat(const char *path, struct stat *stat) {
    return (strcmp(fake_stat_path, path));
}

const char *fake_fopen_path = "";
const char *fake_fopen_mode = "";
FILE *_fhandle = 0;
FILE *fake_fopen(const char *path, const char *mode) {
    static FILE handle;
    int path_matches = !strcmp(fake_fopen_path, path);
    int mode_matches = !strcmp(fake_fopen_mode, mode);
    if(path_matches && mode_matches) {
        _fhandle = &handle;
        return &handle;
    } else {
        _fhandle = 0;
        return 0;
    }
}

char *fake_fgets(char *buf, int n, FILE *fp) {
    if (_fhandle == fp && fp != 0) {
       strncpy(buf, fake_user_token, n - 1);
        return buf;
    } else {
        return 0;
    }
}

int fake_fclose(FILE *fp) {
    return 0;
}


// STDIO



RESET_VARS_START
fake_user = "msmith";
fake_user_token = "123456";
fake_home_dir = "/home/msmith";
fake_stat_path = "/home/msmith/.dual_control";
fake_fopen_path = fake_stat_path;
fake_fopen_mode = "r";
RESET_VARS_END


int validate_compares_to_user_token() {

    // given

    // when
    int valid = validate_token("msmith", "123456");

    // then
    check(valid, "expected result to be valid");

    succeed();

}

int validates_from_the_right_user() {
    //given

    //when
    int valid = validate_token("jbalcita", "12346");

    //then
    check(!valid, "expected result to be invalid");
    succeed();
}

int validates_user_specific_token() {
    //given

    //when
    int valid = validate_token("msmith", "654321");

    //then
    check(!valid, "expected result to be invalid");
    succeed();
}

int runtests() {
    test(validate_compares_to_user_token);
    test(validates_from_the_right_user);
    test(validates_user_specific_token);
    succeed();
}

int main(int argc, char **argv) {
    int rval = !runtests();
    return rval;
}