/*  This file is part of mastodon-cpp.
 *  Copyright © 2018 tastytea <tastytea@tastytea.de>
 *                                                                   
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, version 3.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <string>
#include <map>
#include <vector>
#include "version.hpp"
#include "macros.hpp"
#include "mastodon-cpp.hpp"

#include <iostream>

using namespace Mastodon;
using std::string;

API::API(const string &instance, const string &access_token)
: _instance(instance)
, _access_token(access_token)
, _useragent(string("mastodon-cpp/") + global::version)
, _http(*this, instance, access_token)
{
    //
}

const void API::set_useragent(const std::string &useragent)
{
    _useragent = useragent;
}

const string API::get_useragent() const
{
    return _useragent;
}

const std::string API::urlencode(const string &str) const
{
    std::ostringstream oss;

    for (const std::uint8_t &b: str)
    {
        // Check for unreserved characters (RFC 3986 section 2.3)
        if ((b >= 0x30 && b <= 0x39) || // 0-9
            (b >= 0x41 && b <= 0x5A) || // A-Z
            (b >= 0x61 && b <= 0x7A) || // a-z
            b == 0x2D || b == 0x2E ||   // -, .
            b == 0x5F || b == 0x7E)     // _, ~
        {
            oss << b;
        }
        else
        {
            oss << '%' << std::hex << std::uppercase << (int)(unsigned char)b;
        }
    }

    return oss.str();
}

const string API::maptostr(const parametermap &map, const bool &firstparam)
{
    string result = "";
    char delim = '?';
    if (!firstparam)
    {
        delim = '&';
    }

    for (const auto &it : map)
    {
        if (it.second.size() == 1)
        {
            result += (delim + it.first + "=" + urlencode(it.second.front()));
            if (delim == '?')
            {
                delim = '&';
            }
        }
        else
        {
            for (const string &str : it.second)
            {
                result += (delim + it.first + "[]=" + urlencode(str));
                if (delim == '?')
                {
                    delim = '&';
                }
            }
        }
    }

    ttdebug << "Constructed parameter string: " << result << '\n';
    return result;
}
const string API::maptoformdata(const parametermap &map)
{
    if (map.size() == 0)
    {
        return "";
    }
    
    const string boundary = "MEEP";
    string header;
    string body;

    header = "Content-type: multipart/form-data, boundary=" + boundary + "\r\n";
    header += "Content-Length: ";
    body = "--" + boundary;

    for (const auto &it : map)
    {
        // This is directly after the last boundary
        body += "\r\n";
        if (it.second.size() == 1)
        {
            if (it.first == "avatar" ||
                it.first == "header" ||
                it.first == "file")
            {
                body += "Content-Transfer-Encoding: base64\r\n";
            }
            else
            {
                body += "Content-Transfer-Encoding: 8bit\r\n";
            }
            body += ("Content-Disposition: form-data; name=\"" +
                     it.first + "\"\r\n\r\n");
            body += (it.second.front() + "\r\n--" + boundary);
        }
        else
        {
            for (const string &str : it.second)
            {
                body += ("Content-Disposition: form-data; name=\"" +
                     it.first + "[]\"\r\n\r\n");
                body += (str + "\r\n--" + boundary);
            }
        }
    }
    // The last segment has to have "--" after the boundary
    body += "--\r\n";

    header += (std::to_string(body.length()) + "\r\n\r\n");

    ttdebug << "Form data: \n" << header << body;
    return header + body;
}

// const string API::register_app(const std::string &instance,
//                                const std::string &client_name,
//                                const std::string &redirect_uris,
//                                const std::string &scopes,
//                                const std::string &website)
// {
//     API::parametermap parameters =
//     {
//         { "client_name", { client_name } },
//         { "redirect_uris", { redirect_uris } },
//         { "scopes", { scopes } },
//         { "website", { website } }
//     };

//     string answer;
//     std::uint16_t ret = post(API::v1::apps, parameters, answer);
    
// }