/*
 * This file is part of Applied Energistics 2.
 * Copyright (c) 2013 - 2018, AlgorithmX2, All rights reserved.
 *
 * Applied Energistics 2 is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Applied Energistics 2 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Applied Energistics 2.  If not, see <http://www.gnu.org/licenses/lgpl>.
 */

package appeng.fluids.parts;


import java.util.Collections;
import java.util.List;
import java.util.Objects;

import javax.annotation.Nonnull;

import appeng.api.storage.channels.IItemStorageChannel;
import appeng.fluids.helper.IConfigurableFluidInventory;
import appeng.util.ConfigManager;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.EnumHand;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.math.Vec3d;
import net.minecraftforge.fluids.capability.CapabilityFluidHandler;
import net.minecraftforge.fluids.capability.IFluidHandler;

import appeng.api.AEApi;
import appeng.api.config.AccessRestriction;
import appeng.api.config.FuzzyMode;
import appeng.api.config.IncludeExclude;
import appeng.api.config.Settings;
import appeng.api.config.StorageFilter;
import appeng.api.config.Upgrades;
import appeng.api.networking.IGridNode;
import appeng.api.networking.events.MENetworkCellArrayUpdate;
import appeng.api.networking.security.IActionSource;
import appeng.api.networking.storage.IBaseMonitor;
import appeng.api.networking.ticking.ITickManager;
import appeng.api.networking.ticking.TickRateModulation;
import appeng.api.networking.ticking.TickingRequest;
import appeng.api.parts.IPartHost;
import appeng.api.parts.IPartModel;
import appeng.api.storage.IMEInventory;
import appeng.api.storage.IMEInventoryHandler;
import appeng.api.storage.IMEMonitorHandlerReceiver;
import appeng.api.storage.IStorageChannel;
import appeng.api.storage.IStorageMonitorable;
import appeng.api.storage.IStorageMonitorableAccessor;
import appeng.api.storage.channels.IFluidStorageChannel;
import appeng.api.storage.data.IAEFluidStack;
import appeng.api.storage.data.IItemList;
import appeng.api.util.AEPartLocation;
import appeng.capabilities.Capabilities;
import appeng.core.AppEng;
import appeng.core.settings.TickRates;
import appeng.core.sync.GuiBridge;
import appeng.fluids.util.AEFluidInventory;
import appeng.fluids.util.IAEFluidInventory;
import appeng.fluids.util.IAEFluidTank;
import appeng.helpers.IInterfaceHost;
import appeng.items.parts.PartModels;
import appeng.me.GridAccessException;
import appeng.me.helpers.MachineSource;
import appeng.me.storage.ITickingMonitor;
import appeng.me.storage.MEInventoryHandler;
import appeng.parts.PartModel;
import appeng.parts.misc.PartSharedStorageBus;
import appeng.util.Platform;
import appeng.util.prioritylist.FuzzyPriorityList;
import appeng.util.prioritylist.PrecisePriorityList;


/**
 * @author BrockWS
 * @version rv6 - 22/05/2018
 * @since rv6 22/05/2018
 */
public class PartFluidStorageBus extends PartSharedStorageBus implements IMEMonitorHandlerReceiver<IAEFluidStack>, IAEFluidInventory, IConfigurableFluidInventory
{
	public static final ResourceLocation MODEL_BASE = new ResourceLocation( AppEng.MOD_ID, "part/fluid_storage_bus_base" );
	@PartModels
	public static final IPartModel MODELS_OFF = new PartModel( MODEL_BASE, new ResourceLocation( AppEng.MOD_ID, "part/fluid_storage_bus_off" ) );
	@PartModels
	public static final IPartModel MODELS_ON = new PartModel( MODEL_BASE, new ResourceLocation( AppEng.MOD_ID, "part/fluid_storage_bus_on" ) );
	@PartModels
	public static final IPartModel MODELS_HAS_CHANNEL = new PartModel( MODEL_BASE, new ResourceLocation( AppEng.MOD_ID, "part/fluid_storage_bus_has_channel" ) );

	private final IActionSource source;
	private final AEFluidInventory config = new AEFluidInventory( this, 63 );
	private boolean cached = false;
	private ITickingMonitor monitor = null;
	private MEInventoryHandler<IAEFluidStack> handler = null;
	private int handlerHash = 0;
	private byte resetCacheLogic = 0;

	public PartFluidStorageBus( ItemStack is )
	{
		super( is );
		this.getConfigManager().registerSetting( Settings.ACCESS, AccessRestriction.READ_WRITE );
		this.getConfigManager().registerSetting( Settings.FUZZY_MODE, FuzzyMode.IGNORE_ALL );
		this.getConfigManager().registerSetting( Settings.STORAGE_FILTER, StorageFilter.EXTRACTABLE_ONLY );
		this.source = new MachineSource( this );
	}

	private IMEInventory<IAEFluidStack> getInventoryWrapper( TileEntity target )
	{
		EnumFacing targetSide = this.getSide().getFacing().getOpposite();
		// Prioritize a handler to directly link to another ME network
		IStorageMonitorableAccessor accessor = target.getCapability( Capabilities.STORAGE_MONITORABLE_ACCESSOR, targetSide );
		if( accessor != null )
		{
			IStorageMonitorable inventory = accessor.getInventory( this.source );
			if( inventory != null )
			{
				return inventory.getInventory( AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ) );
			}

			// So this could / can be a design decision. If the tile does support our custom capability,
			// but it does not return an inventory for the action source, we do NOT fall back to using
			// IItemHandler's, as that might circumvent the security setings, and might also cause
			// performance issues.
			return null;
		}

		// Check via cap for IItemHandler
		IFluidHandler handlerExt = target.getCapability( CapabilityFluidHandler.FLUID_HANDLER_CAPABILITY, targetSide );
		if( handlerExt != null )
		{
			return new FluidHandlerAdapter( handlerExt, this );
		}

		return null;
	}

	@Override
	public TickRateModulation tickingRequest( IGridNode node, int ticksSinceLastCall )
	{
		if( this.resetCacheLogic != 0 )
		{
			this.resetCache();
		}

		if( this.monitor != null )
		{
			return this.monitor.onTick();
		}

		return TickRateModulation.SLEEP;
	}

	@Override
	protected void resetCache()
	{
		final boolean fullReset = this.resetCacheLogic == 2;
		this.resetCacheLogic = 0;

		final MEInventoryHandler<IAEFluidStack> in = this.getInternalHandler();
		IItemList<IAEFluidStack> before = AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ).createList();
		if( in != null )
		{
			if( accessChanged )
			{
				AccessRestriction currentAccess = (AccessRestriction) ( (ConfigManager) this.getConfigManager() ).getSetting( Settings.ACCESS );
				AccessRestriction oldAccess = (AccessRestriction) ( (ConfigManager) this.getConfigManager() ).getOldSetting( Settings.ACCESS );
				if( oldAccess.hasPermission( AccessRestriction.READ ) && !currentAccess.hasPermission( AccessRestriction.READ ) )
				{
					readOncePass = true;
				}
				in.setBaseAccess( oldAccess );
				before = in.getAvailableItems( before );
				in.setBaseAccess( currentAccess );
				accessChanged = false;
			}
			else
			{
				before = in.getAvailableItems( before );
			}
		}

		this.cached = false;
		if( fullReset )
		{
			this.handlerHash = 0;
		}

		final MEInventoryHandler<IAEFluidStack> out = this.getInternalHandler();
		IItemList<IAEFluidStack> after = AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ).createList();

		if( in != out )
		{
			if( out != null )
			{
				after = out.getAvailableItems( after );
			}
			Platform.postListChanges( before, after, this, this.source );
		}
	}

	@Override
	protected void resetCache( final boolean fullReset )
	{
		if( this.getHost() == null || this.getHost().getTile() == null || this.getHost().getTile().getWorld() == null || this.getHost()
				.getTile()
				.getWorld().isRemote )
		{
			return;
		}

		if( fullReset )
		{
			this.resetCacheLogic = 2;
		}
		else if( this.resetCacheLogic < 2 )
		{
			this.resetCacheLogic = 1;
		}

		try
		{
			this.getProxy().getTick().alertDevice( this.getProxy().getNode() );
		}
		catch( final GridAccessException e )
		{
			// :P
		}
	}

	@Override
	public boolean onPartActivate( final EntityPlayer player, final EnumHand hand, final Vec3d pos )
	{
		if( Platform.isServer() )
		{
			Platform.openGUI( player, this.getHost().getTile(), this.getSide(), GuiBridge.GUI_STORAGEBUS_FLUID );
		}
		return true;
	}

	@Override
	public void onFluidInventoryChanged( IAEFluidTank inv, int slot )
	{
		if( inv == this.config )
		{
			this.resetCache( true );
		}
	}

	@Override
	public void readFromNBT( final NBTTagCompound data )
	{
		super.readFromNBT( data );
		this.config.readFromNBT( data, "config" );
	}

	@Override
	public void writeToNBT( final NBTTagCompound data )
	{
		super.writeToNBT( data );
		this.config.writeToNBT( data, "config" );
	}

	@Override
	public boolean isValid( final Object verificationToken )
	{
		return this.handler == verificationToken;
	}

	@Override
	public void postChange( final IBaseMonitor<IAEFluidStack> monitor, final Iterable<IAEFluidStack> change, final IActionSource source )
	{
		if( this.getProxy().isActive() )
		{
			AccessRestriction currentAccess = (AccessRestriction) ( (ConfigManager) this.getConfigManager() ).getSetting( Settings.ACCESS );
			if( readOncePass )
			{
				readOncePass = false;
				try
				{
					this.getProxy().getStorage().postAlterationOfStoredItems( AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ), change, source );
				}
				catch( final GridAccessException e )
				{
					// :(
				}
				return;
			}
			if( !currentAccess.hasPermission( AccessRestriction.READ ) )
			{
				return;
			}
			try
			{
				this.getProxy().getStorage().postAlterationOfStoredItems( AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ), change, source );
			}
			catch( final GridAccessException e )
			{
				// :(
			}
		}
	}

	public MEInventoryHandler<IAEFluidStack> getInternalHandler()
	{
		if( this.cached )
		{
			return this.handler;
		}

		final boolean wasSleeping = this.monitor == null;

		this.cached = true;
		final TileEntity self = this.getHost().getTile();
		final TileEntity target = self.getWorld().getTileEntity( self.getPos().offset( this.getSide().getFacing() ) );
		final int newHandlerHash = this.createHandlerHash( target );

		if( newHandlerHash != 0 && newHandlerHash == this.handlerHash )
		{
			return this.handler;
		}

		this.handlerHash = newHandlerHash;
		this.handler = null;
		if( this.monitor != null )
		{
			( (IBaseMonitor<IAEFluidStack>) monitor ).removeListener( this );
		}
		this.monitor = null;
		if( target != null )
		{
			IMEInventory<IAEFluidStack> inv = this.getInventoryWrapper( target );
			if( inv instanceof ITickingMonitor )
			{
				this.monitor = (ITickingMonitor) inv;
				this.monitor.setActionSource( this.source );
				this.monitor.setMode( (StorageFilter) this.getConfigManager().getSetting( Settings.STORAGE_FILTER ) );
			}

			if( inv != null )
			{
				this.checkInterfaceVsStorageBus( target, this.getSide().getOpposite() );

				this.handler = new MEInventoryHandler<>( inv, AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ) );

				this.handler.setBaseAccess( (AccessRestriction) this.getConfigManager().getSetting( Settings.ACCESS ) );
				this.handler.setWhitelist( this.getInstalledUpgrades( Upgrades.INVERTER ) > 0 ? IncludeExclude.BLACKLIST : IncludeExclude.WHITELIST );
				this.handler.setPriority( this.getPriority() );

				final IItemList<IAEFluidStack> priorityList = AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ).createList();

				final int slotsToUse = 18 + this.getInstalledUpgrades( Upgrades.CAPACITY ) * 9;
				for( int x = 0; x < this.config.getSlots() && x < slotsToUse; x++ )
				{
					final IAEFluidStack is = this.config.getFluidInSlot( x );
					if( is != null )
					{
						priorityList.add( is );
					}
				}

				if( this.getInstalledUpgrades( Upgrades.FUZZY ) > 0 )
				{
					this.handler.setPartitionList(
							new FuzzyPriorityList<IAEFluidStack>( priorityList, (FuzzyMode) this.getConfigManager().getSetting( Settings.FUZZY_MODE ) ) );
				}
				else
				{
					this.handler.setPartitionList( new PrecisePriorityList<IAEFluidStack>( priorityList ) );
				}

				if( inv instanceof IBaseMonitor )
				{
					if( ( (AccessRestriction) ( (ConfigManager) this.getConfigManager() ).getSetting( Settings.ACCESS ) ).hasPermission( AccessRestriction.READ ) )
					{
						( (IBaseMonitor<IAEFluidStack>) inv ).addListener( this, this.handler );
					}
				}
			}
		}

		// update sleep state...
		if( wasSleeping != ( this.monitor == null ) )
		{
			try
			{
				final ITickManager tm = this.getProxy().getTick();
				if( this.monitor == null )
				{
					tm.sleepDevice( this.getProxy().getNode() );
				}
				else
				{
					tm.wakeDevice( this.getProxy().getNode() );
				}
			}
			catch( final GridAccessException ignore )
			{
				// :(
			}
		}

		try
		{
			// force grid to update handlers...
			this.getProxy().getGrid().postEvent( new MENetworkCellArrayUpdate() );
		}
		catch( final GridAccessException ignore )
		{
			// :3
		}

		return this.handler;
	}

	private void checkInterfaceVsStorageBus( final TileEntity target, final AEPartLocation side )
	{
		IInterfaceHost achievement = null;

		if( target instanceof IInterfaceHost )
		{
			achievement = (IInterfaceHost) target;
		}

		if( target instanceof IPartHost )
		{
			final Object part = ( (IPartHost) target ).getPart( side );
			if( part instanceof IInterfaceHost )
			{
				achievement = (IInterfaceHost) part;
			}
		}

		if( achievement != null && achievement.getActionableNode() != null )
		{
			// Platform.addStat( achievement.getActionableNode().getPlayerID(), Achievements.Recursive.getAchievement()
			// );
			// Platform.addStat( getActionableNode().getPlayerID(), Achievements.Recursive.getAchievement() );
		}
	}

	@Override
	public List<IMEInventoryHandler> getCellArray( final IStorageChannel channel )
	{
		if( channel == this.getStorageChannel() )
		{
			final IMEInventoryHandler<IAEFluidStack> out = this.getInternalHandler();
			if( out != null )
			{
				return Collections.singletonList( out );
			}
		}
		return super.getCellArray( channel );
	}

	private int createHandlerHash( TileEntity target )
	{
		if( target == null )
		{
			return 0;
		}

		final EnumFacing targetSide = this.getSide().getFacing().getOpposite();

		if( target.hasCapability( Capabilities.STORAGE_MONITORABLE_ACCESSOR, targetSide ) )
		{
			return Objects.hash( target, target.getCapability( Capabilities.STORAGE_MONITORABLE_ACCESSOR, targetSide ) );
		}

		final IFluidHandler fluidHandler = target.getCapability( CapabilityFluidHandler.FLUID_HANDLER_CAPABILITY, targetSide );

		if( fluidHandler != null )
		{
			return Objects.hash( target, fluidHandler, fluidHandler.getTankProperties().length );
		}

		return 0;
	}

	@Override
	public TickingRequest getTickingRequest( IGridNode node )
	{
		return new TickingRequest( TickRates.FluidStorageBus.getMin(), TickRates.FluidStorageBus.getMax(), this.isSleeping(), true );
	}

	@Override
	public void onListUpdate()
	{
		// not used here.
	}

	@Override
	public IStorageChannel getStorageChannel()
	{
		return AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class );
	}

	public IAEFluidTank getConfig()
	{
		return this.config;
	}

	@Override
	public IFluidHandler getFluidInventoryByName(final String name) {
		if (name.equals("config")) {
			return this.config;
		}
		return null;
	}

	@Nonnull
	@Override
	public IPartModel getStaticModels()
	{
		if( this.isActive() && this.isPowered() )
		{
			return MODELS_HAS_CHANNEL;
		}
		else if( this.isPowered() )
		{
			return MODELS_ON;
		}
		else
		{
			return MODELS_OFF;
		}
	}

	@Override
	public ItemStack getItemStackRepresentation()
	{
		return AEApi.instance().definitions().parts().fluidStorageBus().maybeStack( 1 ).orElse( ItemStack.EMPTY );
	}

	@Override
	public GuiBridge getGuiBridge()
	{
		return GuiBridge.GUI_STORAGEBUS_FLUID;
	}
}