/*
    open source routing machine
    Copyright (C) Dennis Luxen, 2010

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU AFFERO General Public License as published by
the Free Software Foundation; either version 3 of the License, or
any later version.

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 Affero General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
or see http://www.gnu.org/licenses/agpl.txt.
 */

#ifndef REQUEST_HANDLER_H
#define REQUEST_HANDLER_H

#include <algorithm>
#include <cctype> // std::tolower
#include <string>
#include <iostream>
#include <boost/lexical_cast.hpp>
#include <boost/noncopyable.hpp>

#include "BasicDatastructures.h"
#include "../DataStructures/HashTable.h"
#include "../Plugins/BasePlugin.h"
#include "../Plugins/RouteParameters.h"
#include "../typedefs.h"

namespace http {

class RequestHandler : private boost::noncopyable {
public:
    explicit RequestHandler() : _pluginCount(0) { }

    ~RequestHandler() {

        for(unsigned i = 0; i < _pluginVector.size(); i++) {
            BasePlugin * tempPointer = _pluginVector[i];
            DELETE( tempPointer );
        }
    }

    void handle_request(const Request& req, Reply& rep){
        //parse command
        std::string request(req.uri);
        time_t ltime;
        struct tm *Tm;

        ltime=time(NULL);
        Tm=localtime(&ltime);

        INFO((Tm->tm_mday < 10 ? "0" : "" )  << Tm->tm_mday << "-" << (Tm->tm_mon < 10 ? "0" : "" )  << Tm->tm_mon << "-" << 1900+Tm->tm_year << " " << (Tm->tm_hour < 10 ? "0" : "" ) << Tm->tm_hour << ":" << (Tm->tm_min < 10 ? "0" : "" ) << Tm->tm_min << ":" << (Tm->tm_sec < 10 ? "0" : "" ) << Tm->tm_sec << " " <<
                req.endpoint.to_string() << " " << request );
        std::string command;
        std::size_t firstAmpPosition = request.find_first_of("?");
        command = request.substr(1,firstAmpPosition-1);
        //DEBUG("[debug] looking for handler for command: " << command);
        try {
            if(pluginMap.Holds(command)) {

                RouteParameters routeParameters;
                std::stringstream ss(( firstAmpPosition == std::string::npos ? "" : request.substr(firstAmpPosition+1) ));
                std::string item;
                while(std::getline(ss, item, '&')) {
                    size_t found = item.find('=');
                    if(found == std::string::npos) {
                        routeParameters.parameters.push_back(item);
                    } else {
                        std::string p = item.substr(0, found);
                        std::transform(p.begin(), p.end(), p.begin(), (int(*)(int)) std::tolower);
                        std::string o = item.substr(found+1);
                        if("jsonp" != p && "hint" != p)
                            std::transform(o.begin(), o.end(), o.begin(), (int(*)(int)) std::tolower);
                        if("loc" == p) {
                            if(25 >= routeParameters.viaPoints.size()) {
                                routeParameters.viaPoints.push_back(o);
                            }
                        } else if("hint" == p) {
                            routeParameters.hints.resize(routeParameters.viaPoints.size());
                            if(routeParameters.viaPoints.size())
                                routeParameters.hints.back() = o;
                        } else {
                            routeParameters.options.Set(p, o);
                        }
                    }
                }
                //				std::cout << "[debug] found handler for '" << command << "' at version: " << pluginMap.Find(command)->GetVersionString() << std::endl;
                //				std::cout << "[debug] remaining parameters: " << parameters.size() << std::endl;
                rep.status = Reply::ok;
                _pluginVector[pluginMap.Find(command)]->HandleRequest(routeParameters, rep );

                //				std::cout << rep.content << std::endl;
            } else {
                rep = Reply::stockReply(Reply::badRequest);
            }
            return;
        } catch(std::exception& e) {
            rep = Reply::stockReply(Reply::internalServerError);
            std::cerr << "[server error] code: " << e.what() << ", uri: " << req.uri << std::endl;
            return;
        }
    };

    void RegisterPlugin(BasePlugin * plugin) {
        std::cout << "[handler] registering plugin " << plugin->GetDescriptor() << std::endl;
        pluginMap.Add(plugin->GetDescriptor(), _pluginCount);
        _pluginVector.push_back(plugin);
        _pluginCount++;
    }

private:
    HashTable<std::string, unsigned> pluginMap;
    std::vector<BasePlugin *> _pluginVector;
    unsigned _pluginCount;
};
} // namespace http

#endif // REQUEST_HANDLER_H