/*
 * Copyright (C) 2016+     AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
 * Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
 * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
 */

#ifndef ACORE_POINTMOVEMENTGENERATOR_H
#define ACORE_POINTMOVEMENTGENERATOR_H

#include "FollowerReference.h"
#include "MovementGenerator.h"

template<class T>
class PointMovementGenerator : public MovementGeneratorMedium< T, PointMovementGenerator<T> >
{
public:
    PointMovementGenerator(uint32 _id, float _x, float _y, float _z, float _speed = 0.0f, float orientation = 0.0f, const Movement::PointsArray* _path = nullptr, bool generatePath = false, bool forceDestination = false) : id(_id),
        i_x(_x), i_y(_y), i_z(_z), speed(_speed), i_orientation(orientation), _generatePath(generatePath), _forceDestination(forceDestination)
    {
        if (_path)
            m_precomputedPath = *_path;
    }

    void DoInitialize(T*);
    void DoFinalize(T*);
    void DoReset(T*);
    bool DoUpdate(T*, uint32);

    void MovementInform(T*);

    void unitSpeedChanged() { i_recalculateSpeed = true; }

    MovementGeneratorType GetMovementGeneratorType() { return POINT_MOTION_TYPE; }

    bool GetDestination(float& x, float& y, float& z) const { x = i_x; y = i_y; z = i_z; return true; }
private:
    uint32 id;
    float i_x, i_y, i_z;
    float speed;
    float i_orientation;
    bool i_recalculateSpeed;
    Movement::PointsArray m_precomputedPath;
    bool _generatePath;
    bool _forceDestination;
};

class AssistanceMovementGenerator : public PointMovementGenerator<Creature>
{
public:
    AssistanceMovementGenerator(float _x, float _y, float _z) :
        PointMovementGenerator<Creature>(0, _x, _y, _z) {}

    MovementGeneratorType GetMovementGeneratorType() { return ASSISTANCE_MOTION_TYPE; }
    void Finalize(Unit*);
};

// Does almost nothing - just doesn't allows previous movegen interrupt current effect.
class EffectMovementGenerator : public MovementGenerator
{
public:
    explicit EffectMovementGenerator(uint32 Id) : m_Id(Id) {}
    void Initialize(Unit*) override {}
    void Finalize(Unit*) override;
    void Reset(Unit*) override {}
    bool Update(Unit*, uint32) override;
    MovementGeneratorType GetMovementGeneratorType() override { return EFFECT_MOTION_TYPE; }
private:
    uint32 m_Id;
};

#endif