#include <memory>
#include <iostream>
#include "user.h"
#include "test_util.h"


bool gets_home_directory() {
    //given
    const char *expected_home_directory = "home/msmith";
    struct passwd test_passwd;
    test_passwd.pw_dir = const_cast<char *>(expected_home_directory);
    user test_user(&test_passwd);

    //when
    std::string actual_home_directory = test_user.home_directory();

    //then
    check(expected_home_directory == actual_home_directory, "directories do not match");
    return expected_home_directory == actual_home_directory;
}


std::shared_ptr<struct passwd> fake_passwd;
int fake_getpwnam_r(const char *nam, struct passwd *pwd, char *buffer, size_t bufsize, struct passwd **result) {
  if (fake_passwd) {
      *pwd = *fake_passwd;
      *result = pwd;
      return 0;
  }
  return -1;
}

bool create_user_succeeds() {
    // given
    std::string username("msmith");
    std::string home_directory("this is my home");
    fake_passwd.reset(new struct passwd);
    fake_passwd->pw_dir = const_cast<char *>(home_directory.c_str());

    // when
    std::shared_ptr<user> user(create_user(username));

    // then
    check(user, "user should be returned");
    check(user->home_directory() == home_directory, "home directory does not match");

    succeed();

}

bool create_user_nonexistent() {
    // given
    std::string username("msmith");

    // when
    std::shared_ptr<user> user(create_user(username));

    // then
    check(!user, "no user should be returned");

    succeed();
}

RESET_VARS_START
fake_passwd.reset((struct passwd *)0);
RESET_VARS_END

int run_tests() {
    test(gets_home_directory);
    test(create_user_succeeds);
    test(create_user_nonexistent);
    succeed();
}
int main(int argc, char *argv[]) {
    return !run_tests();
}