/* 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 <string>
#include <vector>
#include <memory>
#include <fstream>
#include <iostream>
#include <functional>

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

namespace
{
class tokens_impl : public tokens_ifc
{
private:
    fstreams fstreams_;
    totp_generator generator_;
public:
    tokens_impl (const fstreams &fstreams, const totp_generator generator) :
        fstreams_ (fstreams), generator_(generator) {}
    std::string token (const user &user) const override
    {
        return generator_.generate_token("\x00");

        // // Get key
        // const std::string file_path (user.home_directory() + "/.dual_control");
        // fstreams::pstream stream (fstreams_.open_fstream (file_path));

        // if (!stream->good()) {
        //     return "";
        // }

        // // TODO: decode key
        // std::vector<char> line (21);
        // stream->getline (line.data(), line.size());
        // std::vector<char> key = Base32.decode(line.data());
        // // TODO: generate the token
        // return generator_.generate_token (key);
    }
    void save (const user &user, const std::string &token) const override
    {
        std::string file_path (user.home_directory() + "/.dual_control");
        fstreams::postream stream (fstreams_.open_ofstream (file_path,
                                   std::ios_base::trunc));
        *stream << token << std::endl;
    }
};
}

tokens tokens::create (const fstreams &fstreams, const totp_generator &generator)
{
    return tokens (tokens::delegate
                   (new tokens_impl (fstreams, generator)));
}