package appeng.me.storage;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.NavigableMap;
import java.util.concurrent.ConcurrentSkipListMap;
import appeng.api.config.AccessRestriction;
import appeng.api.config.Actionable;
import appeng.api.config.SecurityPermissions;
import appeng.api.networking.IGrid;
import appeng.api.networking.IGridNode;
import appeng.api.networking.security.BaseActionSource;
import appeng.api.networking.security.ISecurityGrid;
import appeng.api.networking.security.MachineSource;
import appeng.api.networking.security.PlayerSource;
import appeng.api.storage.IMEInventoryHandler;
import appeng.api.storage.StorageChannel;
import appeng.api.storage.data.IAEStack;
import appeng.api.storage.data.IItemList;
import appeng.me.cache.SecurityCache;
import appeng.util.ItemSorters;
public class NetworkInventoryHandler<T extends IAEStack<T>> implements IMEInventoryHandler<T>
{
private final static Comparator<Integer> prioritySorter = new Comparator<Integer>() {
@Override
public int compare(Integer o1, Integer o2)
{
return ItemSorters.compareInt( o2, o1 );
}
};
final StorageChannel myChannel;
final SecurityCache security;
// final TreeMultimap<Integer, IMEInventoryHandler<T>> priorityInventory;
private final NavigableMap<Integer, List<IMEInventoryHandler<T>>> priorityInventory;
public NetworkInventoryHandler(StorageChannel chan, SecurityCache security) {
myChannel = chan;
this.security = security;
priorityInventory = new ConcurrentSkipListMap<Integer, List<IMEInventoryHandler<T>>>( prioritySorter ); // TreeMultimap.create( prioritySorter, hashSorter );
}
public void addNewStorage(IMEInventoryHandler<T> h)
{
int priority = h.getPriority();
List<IMEInventoryHandler<T>> list = priorityInventory.get( priority );
if ( list == null )
priorityInventory.put( priority, list = new ArrayList<IMEInventoryHandler<T>>() );
list.add( h );
}
static int currentPass = 0;
int myPass = 0;
static final ThreadLocal<LinkedList> depthMod = new ThreadLocal<LinkedList>();
static final ThreadLocal<LinkedList> depthSim = new ThreadLocal<LinkedList>();
private LinkedList getDepth(Actionable type)
{
ThreadLocal<LinkedList> depth = type == Actionable.MODULATE ? depthMod : depthSim;
LinkedList s = depth.get();
if ( s == null )
depth.set( s = new LinkedList() );
return s;
}
private boolean diveList(NetworkInventoryHandler<T> networkInventoryHandler, Actionable type)
{
LinkedList cDepth = getDepth( type );
if ( cDepth.contains( networkInventoryHandler ) )
return true;
cDepth.push( this );
return false;
}
private boolean diveIteration(NetworkInventoryHandler<T> networkInventoryHandler, Actionable type)
{
LinkedList cDepth = getDepth( type );
if ( cDepth.isEmpty() )
{
currentPass++;
myPass = currentPass;
}
else
{
if ( currentPass == myPass )
return true;
else
myPass = currentPass;
}
cDepth.push( this );
return false;
}
private void surface(NetworkInventoryHandler<T> networkInventoryHandler, Actionable type)
{
if ( getDepth( type ).pop() != this )
throw new RuntimeException( "Invalid Access to Networked Storage API detected." );
}
private boolean testPermission(BaseActionSource src, SecurityPermissions permission)
{
if ( src.isPlayer() )
{
if ( !security.hasPermission( ((PlayerSource) src).player, permission ) )
return true;
}
else if ( src.isMachine() )
{
if ( security.isAvailable() )
{
IGridNode n = ((MachineSource) src).via.getActionableNode();
if ( n == null )
return true;
IGrid gn = n.getGrid();
if ( gn != security.myGrid )
{
int playerID = -1;
ISecurityGrid sg = gn.getCache( ISecurityGrid.class );
playerID = sg.getOwner();
if ( !security.hasPermission( playerID, permission ) )
return true;
}
}
}
return false;
}
@Override
public T injectItems(T input, Actionable type, BaseActionSource src)
{
if ( diveList( this, type ) )
return input;
if ( testPermission( src, SecurityPermissions.INJECT ) )
{
surface( this, type );
return input;
}
for (List<IMEInventoryHandler<T>> invList : priorityInventory.values())
{
Iterator<IMEInventoryHandler<T>> ii = invList.iterator();
while (ii.hasNext() && input != null)
{
IMEInventoryHandler<T> inv = ii.next();
if ( inv.validForPass( 1 ) && inv.canAccept( input )
&& (inv.isPrioritized( input ) || inv.extractItems( input, Actionable.SIMULATE, src ) != null) )
{
input = inv.injectItems( input, type, src );
}
}
ii = invList.iterator();
while (ii.hasNext() && input != null)
{
IMEInventoryHandler<T> inv = ii.next();
if ( inv.validForPass( 2 ) && inv.canAccept( input ) )// ignore crafting on the second pass.
{
input = inv.injectItems( input, type, src );
}
}
}
surface( this, type );
return input;
}
@Override
public T extractItems(T request, Actionable mode, BaseActionSource src)
{
if ( diveList( this, mode ) )
return null;
if ( testPermission( src, SecurityPermissions.EXTRACT ) )
{
surface( this, mode );
return null;
}
Iterator<List<IMEInventoryHandler<T>>> i = priorityInventory.descendingMap().values().iterator();// priorityInventory.asMap().descendingMap().entrySet().iterator();
T output = request.copy();
request = request.copy();
output.setStackSize( 0 );
long req = request.getStackSize();
while (i.hasNext())
{
List<IMEInventoryHandler<T>> invList = i.next();
Iterator<IMEInventoryHandler<T>> ii = invList.iterator();
while (ii.hasNext() && output.getStackSize() < req)
{
IMEInventoryHandler<T> inv = ii.next();
request.setStackSize( req - output.getStackSize() );
output.add( inv.extractItems( request, mode, src ) );
}
}
surface( this, mode );
if ( output.getStackSize() <= 0 )
return null;
return output;
}
@Override
public IItemList<T> getAvailableItems(IItemList out)
{
if ( diveIteration( this, Actionable.SIMULATE ) )
return out;
// for (Entry<Integer, IMEInventoryHandler<T>> h : priorityInventory.entries())
for (List<IMEInventoryHandler<T>> i : priorityInventory.values())
for (IMEInventoryHandler<T> j : i)
out = j.getAvailableItems( out );
surface( this, Actionable.SIMULATE );
return out;
}
@Override
public StorageChannel getChannel()
{
return myChannel;
}
@Override
public AccessRestriction getAccess()
{
return AccessRestriction.READ_WRITE;
}
@Override
public boolean isPrioritized(T input)
{
return false;
}
@Override
public boolean canAccept(T input)
{
return true;
}
@Override
public int getPriority()
{
return 0;
}
@Override
public int getSlot()
{
return 0;
}
@Override
public boolean validForPass(int i)
{
return true;
}
}