/*
 * This file is part of Applied Energistics 2.
 * Copyright (c) 2013 - 2014, 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.client.gui.implementations;


import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.TimeUnit;

import com.google.common.base.Joiner;

import org.apache.commons.lang3.time.DurationFormatUtils;
import org.lwjgl.opengl.GL11;

import net.minecraft.client.gui.GuiButton;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.item.ItemStack;

import appeng.api.AEApi;
import appeng.api.config.SortDir;
import appeng.api.config.SortOrder;
import appeng.api.config.ViewItems;
import appeng.api.storage.data.IAEItemStack;
import appeng.api.storage.data.IItemList;
import appeng.api.util.AEColor;
import appeng.client.gui.AEBaseGui;
import appeng.client.gui.widgets.GuiScrollbar;
import appeng.client.gui.widgets.ISortSource;
import appeng.container.implementations.ContainerCraftingCPU;
import appeng.core.AEConfig;
import appeng.core.AELog;
import appeng.core.localization.GuiText;
import appeng.core.sync.network.NetworkHandler;
import appeng.core.sync.packets.PacketValueConfig;
import appeng.util.Platform;
import appeng.util.ReadableNumberConverter;


public class GuiCraftingCPU extends AEBaseGui implements ISortSource
{
	private static final int GUI_HEIGHT = 184;
	private static final int GUI_WIDTH = 238;

	private static final int DISPLAYED_ROWS = 6;

	private static final int TEXT_COLOR = 0x404040;
	private static final int BACKGROUND_ALPHA = 0x5A000000;

	private static final int SECTION_LENGTH = 67;

	private static final int SCROLLBAR_TOP = 19;
	private static final int SCROLLBAR_LEFT = 218;
	private static final int SCROLLBAR_HEIGHT = 137;

	private static final int CANCEL_LEFT_OFFSET = 163;
	private static final int CANCEL_TOP_OFFSET = 25;
	private static final int CANCEL_HEIGHT = 20;
	private static final int CANCEL_WIDTH = 50;

	private static final int TITLE_TOP_OFFSET = 7;
	private static final int TITLE_LEFT_OFFSET = 8;

	private static final int ITEMSTACK_LEFT_OFFSET = 9;
	private static final int ITEMSTACK_TOP_OFFSET = 22;

	private final ContainerCraftingCPU craftingCpu;

	private IItemList<IAEItemStack> storage = AEApi.instance().storage().createItemList();
	private IItemList<IAEItemStack> active = AEApi.instance().storage().createItemList();
	private IItemList<IAEItemStack> pending = AEApi.instance().storage().createItemList();

	private List<IAEItemStack> visual = new ArrayList<IAEItemStack>();
	private GuiButton cancel;
	private int tooltip = -1;

	public GuiCraftingCPU( final InventoryPlayer inventoryPlayer, final Object te )
	{
		this( new ContainerCraftingCPU( inventoryPlayer, te ) );
	}

	protected GuiCraftingCPU( final ContainerCraftingCPU container )
	{
		super( container );
		this.craftingCpu = container;
		this.ySize = GUI_HEIGHT;
		this.xSize = GUI_WIDTH;

		final GuiScrollbar scrollbar = new GuiScrollbar();
		this.setScrollBar( scrollbar );
	}

	public void clearItems()
	{
		this.storage = AEApi.instance().storage().createItemList();
		this.active = AEApi.instance().storage().createItemList();
		this.pending = AEApi.instance().storage().createItemList();
		this.visual = new ArrayList<IAEItemStack>();
	}

	@Override
	protected void actionPerformed( final GuiButton btn ) throws IOException
	{
		super.actionPerformed( btn );

		if( this.cancel == btn )
		{
			try
			{
				NetworkHandler.instance.sendToServer( new PacketValueConfig( "TileCrafting.Cancel", "Cancel" ) );
			}
			catch( final IOException e )
			{
				AELog.debug( e );
			}
		}
	}

	@Override
	public void initGui()
	{
		super.initGui();
		this.setScrollBar();
		this.cancel = new GuiButton( 0, this.guiLeft + CANCEL_LEFT_OFFSET, this.guiTop + this.ySize - CANCEL_TOP_OFFSET, CANCEL_WIDTH, CANCEL_HEIGHT, GuiText.Cancel.getLocal() );
		this.buttonList.add( this.cancel );
	}

	private void setScrollBar()
	{
		final int size = this.visual.size();

		this.getScrollBar().setTop( SCROLLBAR_TOP ).setLeft( SCROLLBAR_LEFT ).setHeight( SCROLLBAR_HEIGHT );
		this.getScrollBar().setRange( 0, ( size + 2 ) / 3 - DISPLAYED_ROWS, 1 );
	}

	@Override
	public void drawScreen( final int mouseX, final int mouseY, final float btn )
	{
		this.cancel.enabled = !this.visual.isEmpty();

		final int gx = ( this.width - this.xSize ) / 2;
		final int gy = ( this.height - this.ySize ) / 2;

		this.tooltip = -1;

		final int offY = 23;
		int y = 0;
		int x = 0;
		for( int z = 0; z <= 4 * 5; z++ )
		{
			final int minX = gx + 9 + x * 67;
			final int minY = gy + 22 + y * offY;

			if( minX < mouseX && minX + 67 > mouseX )
			{
				if( minY < mouseY && minY + offY - 2 > mouseY )
				{
					this.tooltip = z;
					break;
				}
			}

			x++;

			if( x > 2 )
			{
				y++;
				x = 0;
			}
		}

		super.drawScreen( mouseX, mouseY, btn );
	}

	@Override
	public void drawFG( final int offsetX, final int offsetY, final int mouseX, final int mouseY )
	{
		String title = this.getGuiDisplayName( GuiText.CraftingStatus.getLocal() );

		if( this.craftingCpu.getEstimatedTime() > 0 && !this.visual.isEmpty() )
		{
			final long etaInMilliseconds = TimeUnit.MILLISECONDS.convert( this.craftingCpu.getEstimatedTime(), TimeUnit.NANOSECONDS );
			final String etaTimeText = DurationFormatUtils.formatDuration( etaInMilliseconds, GuiText.ETAFormat.getLocal() );
			title += " - " + etaTimeText;
		}

		this.fontRendererObj.drawString( title, TITLE_LEFT_OFFSET, TITLE_TOP_OFFSET, TEXT_COLOR );

		int x = 0;
		int y = 0;
		final int viewStart = this.getScrollBar().getCurrentScroll() * 3;
		final int viewEnd = viewStart + 3 * 6;

		String dspToolTip = "";
		final List<String> lineList = new LinkedList<String>();
		int toolPosX = 0;
		int toolPosY = 0;

		final int offY = 23;

		final ReadableNumberConverter converter = ReadableNumberConverter.INSTANCE;
		for( int z = viewStart; z < Math.min( viewEnd, this.visual.size() ); z++ )
		{
			final IAEItemStack refStack = this.visual.get( z );// repo.getReferenceItem( z );
			if( refStack != null )
			{
				GlStateManager.pushMatrix();
				GlStateManager.scale( 0.5, 0.5, 0.5 );

				final IAEItemStack stored = this.storage.findPrecise( refStack );
				final IAEItemStack activeStack = this.active.findPrecise( refStack );
				final IAEItemStack pendingStack = this.pending.findPrecise( refStack );

				int lines = 0;

				if( stored != null && stored.getStackSize() > 0 )
				{
					lines++;
				}
				boolean active = false;
				if( activeStack != null && activeStack.getStackSize() > 0 )
				{
					lines++;
					active = true;
				}
				boolean scheduled = false;
				if( pendingStack != null && pendingStack.getStackSize() > 0 )
				{
					lines++;
					scheduled = true;
				}

				if( AEConfig.instance.useColoredCraftingStatus && ( active || scheduled ) )
				{
					final int bgColor = ( active ? AEColor.GREEN.blackVariant : AEColor.YELLOW.blackVariant ) | BACKGROUND_ALPHA;
					final int startX = ( x * ( 1 + SECTION_LENGTH ) + ITEMSTACK_LEFT_OFFSET ) * 2;
					final int startY = ( ( y * offY + ITEMSTACK_TOP_OFFSET ) - 3 ) * 2;
					drawRect( startX, startY, startX + ( SECTION_LENGTH * 2 ), startY + ( offY * 2 ) - 2, bgColor );
				}

				final int negY = ( ( lines - 1 ) * 5 ) / 2;
				int downY = 0;

				if( stored != null && stored.getStackSize() > 0 )
				{
					final String str = GuiText.Stored.getLocal() + ": " + converter.toWideReadableForm( stored.getStackSize() );
					final int w = 4 + this.fontRendererObj.getStringWidth( str );
					this.fontRendererObj.drawString( str, (int) ( ( x * ( 1 + SECTION_LENGTH ) + ITEMSTACK_LEFT_OFFSET + SECTION_LENGTH - 19 - ( w * 0.5 ) ) * 2 ), ( y * offY + ITEMSTACK_TOP_OFFSET + 6 - negY + downY ) * 2, TEXT_COLOR );

					if( this.tooltip == z - viewStart )
					{
						lineList.add( GuiText.Stored.getLocal() + ": " + Long.toString( stored.getStackSize() ) );
					}

					downY += 5;
				}

				if( activeStack != null && activeStack.getStackSize() > 0 )
				{
					final String str = GuiText.Crafting.getLocal() + ": " + converter.toWideReadableForm( activeStack.getStackSize() );
					final int w = 4 + this.fontRendererObj.getStringWidth( str );

					this.fontRendererObj.drawString( str, (int) ( ( x * ( 1 + SECTION_LENGTH ) + ITEMSTACK_LEFT_OFFSET + SECTION_LENGTH - 19 - ( w * 0.5 ) ) * 2 ), ( y * offY + ITEMSTACK_TOP_OFFSET + 6 - negY + downY ) * 2, TEXT_COLOR );

					if( this.tooltip == z - viewStart )
					{
						lineList.add( GuiText.Crafting.getLocal() + ": " + Long.toString( activeStack.getStackSize() ) );
					}

					downY += 5;
				}

				if( pendingStack != null && pendingStack.getStackSize() > 0 )
				{
					final String str = GuiText.Scheduled.getLocal() + ": " + converter.toWideReadableForm( pendingStack.getStackSize() );
					final int w = 4 + this.fontRendererObj.getStringWidth( str );

					this.fontRendererObj.drawString( str, (int) ( ( x * ( 1 + SECTION_LENGTH ) + ITEMSTACK_LEFT_OFFSET + SECTION_LENGTH - 19 - ( w * 0.5 ) ) * 2 ), ( y * offY + ITEMSTACK_TOP_OFFSET + 6 - negY + downY ) * 2, TEXT_COLOR );

					if( this.tooltip == z - viewStart )
					{
						lineList.add( GuiText.Scheduled.getLocal() + ": " + Long.toString( pendingStack.getStackSize() ) );
					}
				}

				GlStateManager.popMatrix();
				final int posX = x * ( 1 + SECTION_LENGTH ) + ITEMSTACK_LEFT_OFFSET + SECTION_LENGTH - 19;
				final int posY = y * offY + ITEMSTACK_TOP_OFFSET;

				final ItemStack is = refStack.copy().getItemStack();

				if( this.tooltip == z - viewStart )
				{
					dspToolTip = Platform.getItemDisplayName( is );

					if( lineList.size() > 0 )
					{
						dspToolTip = dspToolTip + '\n' + Joiner.on( "\n" ).join( lineList );
					}

					toolPosX = x * ( 1 + SECTION_LENGTH ) + ITEMSTACK_LEFT_OFFSET + SECTION_LENGTH - 8;
					toolPosY = y * offY + ITEMSTACK_TOP_OFFSET;
				}

				this.drawItem( posX, posY, is );

				x++;

				if( x > 2 )
				{
					y++;
					x = 0;
				}
			}
		}

		if( this.tooltip >= 0 && !dspToolTip.isEmpty() )
		{
			this.drawTooltip( toolPosX, toolPosY + 10, dspToolTip );
		}
	}

	@Override
	public void drawBG( final int offsetX, final int offsetY, final int mouseX, final int mouseY )
	{
		this.bindTexture( "guis/craftingcpu.png" );
		this.drawTexturedModalRect( offsetX, offsetY, 0, 0, this.xSize, this.ySize );
	}

	public void postUpdate( final List<IAEItemStack> list, final byte ref )
	{
		switch( ref )
		{
			case 0:
				for( final IAEItemStack l : list )
				{
					this.handleInput( this.storage, l );
				}
				break;

			case 1:
				for( final IAEItemStack l : list )
				{
					this.handleInput( this.active, l );
				}
				break;

			case 2:
				for( final IAEItemStack l : list )
				{
					this.handleInput( this.pending, l );
				}
				break;
		}

		for( final IAEItemStack l : list )
		{
			final long amt = this.getTotal( l );

			if( amt <= 0 )
			{
				this.deleteVisualStack( l );
			}
			else
			{
				final IAEItemStack is = this.findVisualStack( l );
				is.setStackSize( amt );
			}
		}

		this.setScrollBar();
	}

	private void handleInput( final IItemList<IAEItemStack> s, final IAEItemStack l )
	{
		IAEItemStack a = s.findPrecise( l );

		if( l.getStackSize() <= 0 )
		{
			if( a != null )
			{
				a.reset();
			}
		}
		else
		{
			if( a == null )
			{
				s.add( l.copy() );
				a = s.findPrecise( l );
			}

			if( a != null )
			{
				a.setStackSize( l.getStackSize() );
			}
		}
	}

	private long getTotal( final IAEItemStack is )
	{
		final IAEItemStack a = this.storage.findPrecise( is );
		final IAEItemStack b = this.active.findPrecise( is );
		final IAEItemStack c = this.pending.findPrecise( is );

		long total = 0;

		if( a != null )
		{
			total += a.getStackSize();
		}

		if( b != null )
		{
			total += b.getStackSize();
		}

		if( c != null )
		{
			total += c.getStackSize();
		}

		return total;
	}

	private void deleteVisualStack( final IAEItemStack l )
	{
		final Iterator<IAEItemStack> i = this.visual.iterator();

		while( i.hasNext() )
		{
			final IAEItemStack o = i.next();
			if( o.equals( l ) )
			{
				i.remove();
				return;
			}
		}
	}

	private IAEItemStack findVisualStack( final IAEItemStack l )
	{
		for( final IAEItemStack o : this.visual )
		{
			if( o.equals( l ) )
			{
				return o;
			}
		}

		final IAEItemStack stack = l.copy();
		this.visual.add( stack );

		return stack;
	}

	@Override
	public Enum getSortBy()
	{
		return SortOrder.NAME;
	}

	@Override
	public Enum getSortDir()
	{
		return SortDir.ASCENDING;
	}

	@Override
	public Enum getSortDisplay()
	{
		return ViewItems.ALL;
	}
}