/*
 open source routing machine
 Copyright (C) Dennis Luxen, others 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 TURNINSTRUCTIONS_H_
#define TURNINSTRUCTIONS_H_

#include <string>

typedef unsigned char TurnInstruction;

//This is a hack until c++0x is available enough to use scoped enums
struct TurnInstructionsClass {

    const static TurnInstruction NoTurn = 0;          //Give no instruction at all
    const static TurnInstruction GoStraight = 1;      //Tell user to go straight!
    const static TurnInstruction TurnSlightRight = 2;
    const static TurnInstruction TurnRight = 3;
    const static TurnInstruction TurnSharpRight = 4;
    const static TurnInstruction UTurn = 5;
    const static TurnInstruction TurnSharpLeft = 6;
    const static TurnInstruction TurnLeft = 7;
    const static TurnInstruction TurnSlightLeft = 8;
    const static TurnInstruction ReachViaPoint = 9;
    const static TurnInstruction HeadOn = 10;
    const static TurnInstruction EnterRoundAbout = 11;
    const static TurnInstruction LeaveRoundAbout = 12;
    const static TurnInstruction StayOnRoundAbout = 13;
    const static TurnInstruction StartAtEndOfStreet = 14;
    const static TurnInstruction ReachedYourDestination = 15;

    const static TurnInstruction AccessRestrictionFlag = 128;
    const static TurnInstruction InverseAccessRestrictionFlag = 0x7f; // ~128 does not work without a warning.

    const static int AccessRestrictionPenalty = 1 << 15; //unrelated to the bit set in the restriction flag

//    std::string TurnStrings[16];
//    std::string Ordinals[12];

    //This is a hack until c++0x is available enough to use initializer lists.
//    TurnInstructionsClass(){
//        TurnStrings [0] = "";
//        TurnStrings [1] = "Continue";
//        TurnStrings [2] = "Turn slight right";
//        TurnStrings [3] = "Turn right";
//        TurnStrings [4] = "Turn sharp right";
//        TurnStrings [5] = "U-Turn";
//        TurnStrings [6] = "Turn sharp left";
//        TurnStrings [7] = "Turn left";
//        TurnStrings [8] = "Turn slight left";
//        TurnStrings [9] = "Reach via point";
//        TurnStrings[10] = "Head";
//        TurnStrings[11] = "Enter roundabout";
//        TurnStrings[12] = "Leave roundabout";
//        TurnStrings[13] = "Stay on roundabout";
//        TurnStrings[14] = "Start";
//        TurnStrings[15] = "You have reached your destination";
//
//        Ordinals[0]     = "zeroth";
//        Ordinals[1]     = "first";
//        Ordinals[2]     = "second";
//        Ordinals[3]     = "third";
//        Ordinals[4]     = "fourth";
//        Ordinals[5]     = "fifth";
//        Ordinals[6]     = "sixth";
//        Ordinals[7]     = "seventh";
//        Ordinals[8]     = "eighth";
//        Ordinals[9]     = "nineth";
//        Ordinals[10]    = "tenth";
//        Ordinals[11]    = "one of the too many";
//    };

    static inline TurnInstruction GetTurnDirectionOfInstruction( const double angle ) {
        if(angle >= 23 && angle < 67) {
            return TurnSharpRight;
        }
        if (angle >= 67 && angle < 113) {
            return TurnRight;
        }
        if (angle >= 113 && angle < 158) {
            return TurnSlightRight;
        }
        if (angle >= 158 && angle < 202) {
            return GoStraight;
        }
        if (angle >= 202 && angle < 248) {
            return TurnSlightLeft;
        }
        if (angle >= 248 && angle < 292) {
            return TurnLeft;
        }
        if (angle >= 292 && angle < 336) {
            return TurnSharpLeft;
        }
        return UTurn;
    }

    static inline bool TurnIsNecessary ( const short turnInstruction ) {
        if(NoTurn == turnInstruction || StayOnRoundAbout == turnInstruction)
            return false;
        return true;
    }

};

static TurnInstructionsClass TurnInstructions;

#endif /* TURNINSTRUCTIONS_H_ */