// Cyphesis Online RPG Server and AI Engine
// Copyright (C) 2000-2004 Alistair Riddoch
//
// 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, write to the Free Software Foundation,
// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA


#include "BaseWorld.h"

#include "id.h"
#include "log.h"
#include "SystemTime.h"

#include <cassert>

BaseWorld * BaseWorld::m_instance = 0;

/// \brief BaseWorld constructor.
///
/// Protected as BaseWorld is a base class.
/// This constructor registers the instance created as the singleton, and
/// in debug mode ensures that an instance has not already been created.
/// @param gw the top level in-game entity in the world.
BaseWorld::BaseWorld(LocatedEntity & gw) : m_isSuspended(false), m_gameWorld(gw), m_defaultLocation(&gw), m_limboLocation(nullptr)
{
    assert(m_instance == 0);
    m_instance = this;
}

/// \brief BaseWorld destructor.
///
/// Removes this instance from the singleton pointer. In debug mode ensures
/// that this instance is correctly installed as the singleton.
BaseWorld::~BaseWorld()
{
    assert(m_instance == this);
    m_instance = 0;
}

/// \brief Get an in-game Entity by its string ID.
///
/// @param id string ID of Entity to be retrieved.
/// @return pointer to Entity retrieved, or zero if it was not found.
LocatedEntity * BaseWorld::getEntity(const std::string & id) const
{
    long intId = integerId(id);

    EntityDict::const_iterator I = m_eobjects.find(intId);
    if (I != m_eobjects.end()) {
        assert(I->second != 0);
        return I->second;
    } else {
        return 0;
    }
}

/// \brief Get an in-game Entity by its integer ID.
///
/// @param id integer ID of Entity to be retrieved.
/// @return pointer to Entity retrieved, or zero if it was not found.
LocatedEntity * BaseWorld::getEntity(long id) const
{
    EntityDict::const_iterator I = m_eobjects.find(id);
    if (I != m_eobjects.end()) {
        assert(I->second != 0);
        return I->second;
    } else {
        return 0;
    }
}

LocatedEntity& BaseWorld::getRootEntity()
{
    return m_gameWorld;
}

LocatedEntity& BaseWorld::getRootEntity() const
{
    return m_gameWorld;
}

LocatedEntity& BaseWorld::getDefaultLocation()
{
    return *m_defaultLocation;
}

LocatedEntity& BaseWorld::getDefaultLocation() const
{
    return *m_defaultLocation;
}

void BaseWorld::setDefaultLocation(LocatedEntity* entity)
{
    //If null is provided we'll revert back to the root world.
    if (!entity) {
        m_defaultLocation = &m_gameWorld;
    } else {
        m_defaultLocation = entity;
    }
}

LocatedEntity* BaseWorld::getLimboLocation() const
{
    return m_limboLocation;
}

void BaseWorld::setLimboLocation(LocatedEntity* entity)
{
    m_limboLocation = entity;
}

void BaseWorld::setIsSuspended(bool suspended)
{
    bool wasSuspended = m_isSuspended;
    m_isSuspended = suspended;
    if (!suspended && wasSuspended) {
        log(INFO, "Resuming world.");
        resumeWorld();
    } else {
        log(INFO, "Suspending world.");
    }
}

double BaseWorld::getTime() const {
    SystemTime time;
    time.update();
    return (double)(time.seconds() + timeoffset - m_initTime) + (double)time.microseconds()/1000000.;
}