/*
* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
* its licensors.
*
* For complete copyright and license terms please see the LICENSE at the root of this
* distribution (the "License"). All use of this software is governed by the License,
* or, if provided, by the license below or the license accompanying this file. Do not
* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
*/
// Original file Copyright Crytek GMBH or its affiliates, used under license.

#ifndef CRYINCLUDE_CRYAISYSTEM_MOVEMENT_MOVEMENTSYSTEM_H
#define CRYINCLUDE_CRYAISYSTEM_MOVEMENT_MOVEMENTSYSTEM_H
#pragma once

#include "IMovementSystem.h"
#include "MovementRequest.h"
#include "MovementActor.h"

struct MovementUpdateContext;

class MovementSystem
    : public IMovementSystem
{
public:
    MovementSystem();

    // IMovementSystem
    virtual void RegisterEntity(const EntityId entityId, MovementActorCallbacks callbacksConfiguration, IMovementActorAdapter& adapter) override;
    virtual void UnregisterEntity(const EntityId entityId) override;
    virtual MovementRequestID QueueRequest(const MovementRequest& request) override;
    virtual void CancelRequest(const MovementRequestID& id) override;
    virtual void GetRequestStatus(const MovementRequestID& id, MovementRequestStatus& status) const override;
    virtual void Update(float updateTime) override;
    virtual void Reset() override;
    virtual void RegisterFunctionToConstructMovementBlockForCustomNavigationType(Movement::CustomNavigationBlockCreatorFunction blockFactoryFunction) override;
    // ~IMovementSystem

    Movement::BlockPtr CreateCustomBlock(const CNavPath& path, const PathPointDescriptor::OffMeshLinkData& mnmData, const MovementStyle& style);

    typedef std::pair<MovementRequestID, MovementRequest> MovementRequestPair;

private:
    enum ActorUpdateStatus
    {
        KeepUpdatingActor,
        ActorCanBeRemoved
    };

    MovementRequestID GenerateUniqueMovementRequestID();
    void FinishRequest(MovementActor& actor, MovementRequestResult::Result result,
        MovementRequestResult::FailureReason failureReason = MovementRequestResult::NoReason);
    void CleanUpAfterFinishedRequest(MovementActor& actor);
    MovementRequest& GetActiveRequest(MovementActor& actor, MovementRequestID* outRequestID = NULL);
    MovementActor& GetExistingActorOrCreateNewOne(const EntityId entityId, IMovementActorAdapter& adapter);
    MovementActor* GetExistingActor(const EntityId entityId);
    bool IsPlannerWorkingOnRequestID(const MovementActor& actor, const MovementRequestID& id) const;
    void UpdateActors(float updateTime);
    ActorUpdateStatus UpdateActor(MovementActor& actor, float updateTime);
    void UpdatePlannerAndDealWithResult(const MovementUpdateContext& context);
    void StartWorkingOnNewRequestIfPossible(const MovementUpdateContext& context);

    #if defined(COMPILE_WITH_MOVEMENT_SYSTEM_DEBUG)
    void DrawDebugInformation() const;
    void DrawMovementRequestsForActor(const MovementActor& actor) const;
    #endif

    // Contains pairs of MovementRequestID and MovementRequest
    typedef std::vector<MovementRequestPair> Requests;
    Requests m_requests;

    // The actors are added and removed when they get new requests and
    // when they run out of them.
    typedef std::vector<MovementActor> Actors;
    Actors m_actors;

    MovementRequestID m_nextUniqueRequestID;
    Movement::CustomNavigationBlockCreatorFunction m_createMovementBlockToHandleCustomNavigationType;
};



#endif // CRYINCLUDE_CRYAISYSTEM_MOVEMENT_MOVEMENTSYSTEM_H