/*
 * Copyright (C) 2008-2012 TrinityCore <http://www.trinitycore.org/>
 * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
 *
 * 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; either version 2 of the License, or (at your
 * option) 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 General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef TRINITY_DESTINATION_HOLDER_H
#define TRINITY_DESTINATION_HOLDER_H

#include "Define.h"
#include "Timer.h"

class WorldObject;
class Map;

#define TRAVELLER_UPDATE_INTERVAL  300

template<typename TRAVELLER>
class DestinationHolder
{
    TimeTrackerSmall i_tracker;
    uint32 i_totalTravelTime;
    uint32 i_timeElapsed;
    bool i_destSet;
    float i_fromX, i_fromY, i_fromZ;
    float i_destX, i_destY, i_destZ;

    public:
        DestinationHolder() : i_tracker(TRAVELLER_UPDATE_INTERVAL), i_totalTravelTime(0), i_timeElapsed(0),
            i_destSet(false), i_fromX(0), i_fromY(0), i_fromZ(0), i_destX(0), i_destY(0), i_destZ(0) {}

        uint32 SetDestination(TRAVELLER &traveller, float dest_x, float dest_y, float dest_z, bool sendMove = true);
        void GetDestination(float &x, float &y, float &z) const { x = i_destX; y = i_destY; z = i_destZ; }
        bool UpdateExpired(void) const { return i_tracker.Passed(); }
        void ResetUpdate(uint32 t = TRAVELLER_UPDATE_INTERVAL) { i_tracker.Reset(t); }
        uint32 GetTotalTravelTime(void) const { return i_totalTravelTime; }
        void IncreaseTravelTime(uint32 increment) { i_totalTravelTime += increment; }
        void ResetTravelTime() { i_totalTravelTime = 0; }
        bool HasDestination(void) const { return i_destSet; }
        float GetDestinationDiff(float x, float y, float z) const;
        bool HasArrived(void) const { return (i_totalTravelTime == 0 || i_timeElapsed >= i_totalTravelTime); }
        bool UpdateTraveller(TRAVELLER &traveller, uint32 diff, bool micro_movement=false);
        uint32 StartTravel(TRAVELLER &traveller, bool sendMove = true);
        void GetLocationNow(const Map* map, float &x, float &y, float &z, bool is3D = false) const;
        void GetLocationNowNoMicroMovement(float &x, float &y, float &z) const; // For use without micro movement
        float GetDistance3dFromDestSq(const WorldObject &obj) const;

    private:
        void _findOffSetPoint(float x1, float y1, float x2, float y2, float offset, float &x, float &y);

};
#endif