package mekanism.client.render.tileentity;

import mekanism.api.Object3D;
import mekanism.common.tileentity.TileEntityBin;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.FontRenderer;
import net.minecraft.client.renderer.OpenGlHelper;
import net.minecraft.client.renderer.RenderBlocks;
import net.minecraft.client.renderer.entity.RenderItem;
import net.minecraft.client.renderer.entity.RenderManager;
import net.minecraft.client.renderer.texture.TextureManager;
import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.world.World;
import net.minecraftforge.common.ForgeDirection;

import org.lwjgl.opengl.GL11;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

@SideOnly(Side.CLIENT)
public class RenderBin extends TileEntitySpecialRenderer
{
    private final RenderBlocks renderBlocks = new RenderBlocks();
    private final RenderItem renderItem = (RenderItem)RenderManager.instance.getEntityClassRenderObject(EntityItem.class);
    
	@Override
	public void renderTileEntityAt(TileEntity tileEntity, double x, double y, double z, float partialTick)
	{
		renderAModelAt((TileEntityBin)tileEntity, x, y, z, partialTick);
	}

    @SuppressWarnings("incomplete-switch")
	private void renderAModelAt(TileEntityBin tileEntity, double x, double y, double z, float partialTick)
	{
        if(tileEntity instanceof TileEntityBin)
        {
            String amount = "";
            ItemStack itemStack = tileEntity.getStack();

            if(itemStack != null)
            {
                amount = Integer.toString(tileEntity.itemCount);
            }

        	Object3D obj = Object3D.get(tileEntity).getFromSide(ForgeDirection.getOrientation(tileEntity.facing));
        	
            if(tileEntity.worldObj.isBlockSolidOnSide(obj.xCoord, obj.yCoord, obj.zCoord, ForgeDirection.getOrientation(tileEntity.facing).getOpposite()))
            {
                return;
            }
            
            doLight(tileEntity.worldObj, obj);
            OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, 240, 240);

            if(itemStack != null)
            {
                GL11.glPushMatrix();

                switch(ForgeDirection.getOrientation(tileEntity.facing))
                {
                    case NORTH:
                        GL11.glTranslated(x + 0.73, y + 0.83, z - 0.01);
                        break;
                    case SOUTH:
                        GL11.glTranslated(x + 0.27, y + 0.83, z + 1.01);
                        GL11.glRotatef(180, 0, 1, 0);
                        break;
                    case WEST:
                        GL11.glTranslated(x - 0.01, y + 0.83, z + 0.27);
                        GL11.glRotatef(90, 0, 1, 0);
                        break;
                    case EAST:
                        GL11.glTranslated(x + 1.01, y + 0.83, z + 0.73);
                        GL11.glRotatef(-90, 0, 1, 0);
                        break;
                }

                float scale = 0.03125F;
                float scaler = 0.9F;
                
                GL11.glScalef(scale*scaler, scale*scaler, 0);
                GL11.glRotatef(180, 0, 0, 1);

                TextureManager renderEngine = Minecraft.getMinecraft().renderEngine;

                GL11.glDisable(GL11.GL_LIGHTING);
                
                renderItem.renderItemAndEffectIntoGUI(getFontRenderer(), renderEngine, itemStack, 0, 0);
                
                GL11.glEnable(GL11.GL_LIGHTING);
                GL11.glPopMatrix();
            }

            if(amount != "")
            {
                renderText(amount, ForgeDirection.getOrientation(tileEntity.facing), 0.02F, x, y - 0.31F, z);
            }
        }
    }

    private void doLight(World world, Object3D obj)
    {
        if(world.isBlockOpaqueCube(obj.xCoord, obj.yCoord, obj.zCoord))
        {
            return;
        }
        
        int brightness = world.getLightBrightnessForSkyBlocks(obj.xCoord, obj.yCoord, obj.zCoord, 0);
        int lightX = brightness % 65536;
        int lightY = brightness / 65536;
        float scale = 0.6F;
        
        OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, lightX * scale, lightY * scale);
    }

    @SuppressWarnings("incomplete-switch")
    private void renderText(String text, ForgeDirection side, float maxScale, double x, double y, double z)
    {
        GL11.glPushMatrix();

        GL11.glPolygonOffset(-10, -10);
        GL11.glEnable(GL11.GL_POLYGON_OFFSET_FILL);

        float displayWidth = 1 - (2 / 16);
        float displayHeight = 1 - (2 / 16);
        GL11.glTranslated(x, y, z);

        switch(side)
        {
            case SOUTH:
                GL11.glTranslatef(0, 1, 0);
                GL11.glRotatef(0, 0, 1, 0);
                GL11.glRotatef(90, 1, 0, 0);
                break;
            case NORTH:
                GL11.glTranslatef(1, 1, 1);
                GL11.glRotatef(180, 0, 1, 0);
                GL11.glRotatef(90, 1, 0, 0);
                break;
            case EAST:
                GL11.glTranslatef(0, 1, 1);
                GL11.glRotatef(90, 0, 1, 0);
                GL11.glRotatef(90, 1, 0, 0);
                break;
            case WEST:
                GL11.glTranslatef(1, 1, 0);
                GL11.glRotatef(-90, 0, 1, 0);
                GL11.glRotatef(90, 1, 0, 0);
                break;
        }

        GL11.glTranslatef(displayWidth / 2, 1F, displayHeight / 2);
        GL11.glRotatef(-90, 1, 0, 0);

        FontRenderer fontRenderer = getFontRenderer();

        int requiredWidth = Math.max(fontRenderer.getStringWidth(text), 1);
        int lineHeight = fontRenderer.FONT_HEIGHT + 2;
        int requiredHeight = lineHeight * 1;
        float scaler = 0.4F;
        float scaleX = (displayWidth / requiredWidth);
        float scale = scaleX * scaler;

        if(maxScale > 0)
        {
            scale = Math.min(scale, maxScale);
        }

        GL11.glScalef(scale, -scale, scale);
        GL11.glDepthMask(false);

        int offsetX;
        int offsetY;
        int realHeight = (int)Math.floor(displayHeight / scale);
        int realWidth = (int)Math.floor(displayWidth / scale);

        offsetX = (realWidth - requiredWidth) / 2;
        offsetY = (realHeight - requiredHeight) / 2;

        GL11.glDisable(GL11.GL_LIGHTING);
        fontRenderer.drawString("\u00a7f" + text, offsetX - (realWidth / 2), 1 + offsetY - (realHeight / 2), 1);
        GL11.glEnable(GL11.GL_LIGHTING);
        GL11.glDepthMask(true);
        GL11.glDisable(GL11.GL_POLYGON_OFFSET_FILL);

        GL11.glPopMatrix();
    }
}