/* Copyright (C) CJ Affiliate
 *
 * You may use, distribute and modify this code under  the
 * terms of the  GNU General Public License  version 2  or
 * later.
 *
 * You should have received a copy of the license with this
 * file. If not, you will find a copy in the "LICENSE" file
 * at https://github.com/cjdev/dual-control.
 */

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

#include "token.h"
#include "test_util.h"
#include "user.h"
#include "sys_fstream.h"

class fake_user : public user_ifc
{
private:
    std::string home_directory_;
public:
    fake_user() {}
    fake_user (const std::string &home_directory) :
        home_directory_ (home_directory)
    {
    }
    std::string home_directory()
    {
        return home_directory_;
    }
};

class fake_fstreams : public fstreams_ifc
{
private:
    std::string expected_file_path_;
    std::string file_contents_;
public:
    fake_fstreams (const std::string &expected_file_path,
                   const std::string &file_contents)
        : expected_file_path_ (expected_file_path),
          file_contents_ (file_contents) {}
    pstream open_fstream (const std::string &file_path)
    {
        if (file_path == expected_file_path_) {
            return fstreams::pstream (new std::istringstream (file_contents_));
        } else {
            return fstreams_ifc::open_fstream (file_path);
        }

    }
};

int reads_from_the_right_file ()
{
    //given
    std::string home_directory = "/somedir";
    // hardcoded file name is .dual_control in the user's home directory
    std::string token_file = home_directory + "/.dual_control";
    std::string token ("123456");
    fstreams test_streams (fstreams::delegate (new fake_fstreams (token_file,
                           token)));

    //file_reader test_file_reader (file_reader::delegate (new fake_file_reader));
    user test_user (user::delegate (new fake_user (home_directory)));
    user_token_supplier supplier (user_token_supplier::create (
                                      test_streams));

    //when
    std::string actual = supplier.token (test_user);

    //then
    check (actual == token, "token does not match");
    succeed();
}

int returns_empty_string_if_file_open_fail()
{
    //given
    std::string home_directory = "/somedir";
    // hardcoded file name is .dual_control in the user's home directory
    std::string token_file = home_directory + "/.not_dual_control";
    fstreams test_streams (fstreams::delegate (new fake_fstreams (token_file,
                           "654321")));
    user test_user (user::delegate (new fake_user (home_directory)));
    user_token_supplier supplier (user_token_supplier::create (
                                      test_streams));

    //when
    std::string actual = supplier.token (test_user);

    //then
    check (actual == "", "should have returned empty string");
    succeed();
}

RESET_VARS_START
RESET_VARS_END

int run_tests()
{
    test (reads_from_the_right_file);
    test (returns_empty_string_if_file_open_fail);
    succeed();
}

int main (int argc, char *argv[])
{
    return !run_tests();
}