BloodMagic/src/main/java/WayofTime/bloodmagic/util/handler/event/ClientHandler.java

package WayofTime.bloodmagic.util.handler.event;

import WayofTime.bloodmagic.annot.Handler;
import WayofTime.bloodmagic.api.Constants;
import WayofTime.bloodmagic.api.registry.RitualRegistry;
import WayofTime.bloodmagic.api.ritual.AreaDescriptor;
import WayofTime.bloodmagic.api.ritual.IMasterRitualStone;
import WayofTime.bloodmagic.api.ritual.Ritual;
import WayofTime.bloodmagic.api.ritual.RitualComponent;
import WayofTime.bloodmagic.client.render.RenderFakeBlocks;
import WayofTime.bloodmagic.item.ItemRitualDiviner;
import WayofTime.bloodmagic.item.ItemRitualReader;
import WayofTime.bloodmagic.tile.TileMasterRitualStone;
import WayofTime.bloodmagic.util.GhostItemHelper;
import WayofTime.bloodmagic.util.helper.TextHelper;
import net.minecraft.client.Minecraft;
import net.minecraft.client.entity.EntityPlayerSP;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.client.renderer.texture.TextureAtlasSprite;
import net.minecraft.client.renderer.texture.TextureMap;
import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.*;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.RayTraceResult;
import net.minecraft.world.World;
import net.minecraftforge.client.event.RenderWorldLastEvent;
import net.minecraftforge.client.event.TextureStitchEvent;
import net.minecraftforge.event.entity.player.ItemTooltipEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;
import org.lwjgl.opengl.GL11;

import java.util.List;

@Handler
@SideOnly(Side.CLIENT)
public class ClientHandler
{
    public TextureAtlasSprite ritualStoneBlank;
    public TextureAtlasSprite ritualStoneWater;
    public TextureAtlasSprite ritualStoneFire;
    public TextureAtlasSprite ritualStoneEarth;
    public TextureAtlasSprite ritualStoneAir;
    public TextureAtlasSprite ritualStoneDawn;
    public TextureAtlasSprite ritualStoneDusk;

    private static Minecraft minecraft = Minecraft.getMinecraft();

    @SubscribeEvent
    public void onTooltipEvent(ItemTooltipEvent event)
    {
        ItemStack stack = event.getItemStack();
        if (stack == null)
        {
            return;
        }

        if (GhostItemHelper.hasGhostAmount(stack))
        {
            int amount = GhostItemHelper.getItemGhostAmount(stack);
            if (amount == 0)
            {
                event.getToolTip().add(TextHelper.localize("tooltip.BloodMagic.ghost.everything"));
            } else
            {
                event.getToolTip().add(TextHelper.localize("tooltip.BloodMagic.ghost.amount", amount));
            }
        }
    }

    @SubscribeEvent
    public void onTextureStitch(TextureStitchEvent.Pre event)
    {
        final String BLOCKS = "blocks";

        ritualStoneBlank = forName(event.getMap(), "RitualStone", BLOCKS);
        ritualStoneWater = forName(event.getMap(), "WaterRitualStone", BLOCKS);
        ritualStoneFire = forName(event.getMap(), "FireRitualStone", BLOCKS);
        ritualStoneEarth = forName(event.getMap(), "EarthRitualStone", BLOCKS);
        ritualStoneAir = forName(event.getMap(), "AirRitualStone", BLOCKS);
        ritualStoneDawn = forName(event.getMap(), "LightRitualStone", BLOCKS);
        ritualStoneDusk = forName(event.getMap(), "DuskRitualStone", BLOCKS);
    }

    @SubscribeEvent
    public void render(RenderWorldLastEvent event)
    {
        EntityPlayerSP player = minecraft.thePlayer;
        World world = player.worldObj;

        if (minecraft.objectMouseOver == null || minecraft.objectMouseOver.typeOfHit != RayTraceResult.Type.BLOCK)
            return;

        TileEntity tileEntity = world.getTileEntity(minecraft.objectMouseOver.getBlockPos());

        if (tileEntity instanceof IMasterRitualStone && player.getHeldItemMainhand() != null && player.getHeldItemMainhand().getItem() instanceof ItemRitualDiviner)
            renderRitualStones(player, event.getPartialTicks());

        if (tileEntity instanceof TileMasterRitualStone && player.getHeldItemMainhand() != null && player.getHeldItemMainhand().getItem() instanceof ItemRitualReader)
            renderRitualInformation(player, event.getPartialTicks());
    }

    private static TextureAtlasSprite forName(TextureMap textureMap, String name, String dir)
    {
        return textureMap.registerSprite(new ResourceLocation(Constants.Mod.DOMAIN + dir + "/" + name));
    }

    private void renderRitualInformation(EntityPlayerSP player, float partialTicks)
    {
        World world = player.worldObj;
        TileMasterRitualStone mrs = (TileMasterRitualStone) world.getTileEntity(minecraft.objectMouseOver.getBlockPos());
        Ritual ritual = mrs.getCurrentRitual();

        if (ritual != null)
        {
            List<String> ranges = ritual.getListOfRanges();
            for (String range : ranges)
            {
                AreaDescriptor areaDescriptor = ritual.getBlockRange(range);

                for (BlockPos pos : areaDescriptor.getContainedPositions(minecraft.objectMouseOver.getBlockPos()))
                    RenderFakeBlocks.drawFakeBlock(ritualStoneBlank, pos.getX(), pos.getY(), pos.getZ(), world);
            }
        }
    }

    private void renderRitualStones(EntityPlayerSP player, float partialTicks)
    {
        World world = player.worldObj;
        ItemRitualDiviner ritualDiviner = (ItemRitualDiviner) player.inventory.getCurrentItem().getItem();
        EnumFacing direction = ritualDiviner.getDirection(player.inventory.getCurrentItem());
        Ritual ritual = RitualRegistry.getRitualForId(ritualDiviner.getCurrentRitual(player.inventory.getCurrentItem()));

        if (ritual == null)
            return;

        GlStateManager.pushMatrix();
        GlStateManager.enableBlend();
        GlStateManager.blendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);

        BlockPos vec3 = new BlockPos(minecraft.objectMouseOver.getBlockPos().getX(), minecraft.objectMouseOver.getBlockPos().getY(), minecraft.objectMouseOver.getBlockPos().getZ());
        double posX = player.lastTickPosX + (player.posX - player.lastTickPosX) * partialTicks;
        double posY = player.lastTickPosY + (player.posY - player.lastTickPosY) * partialTicks;
        double posZ = player.lastTickPosZ + (player.posZ - player.lastTickPosZ) * partialTicks;

        for (RitualComponent ritualComponent : ritual.getComponents())
        {
            BlockPos vX = vec3.add(new BlockPos(ritualComponent.getX(direction), ritualComponent.getY(), ritualComponent.getZ(direction)));
            double minX = vX.getX() - posX;
            double minY = vX.getY() - posY;
            double minZ = vX.getZ() - posZ;

            if (!world.getBlockState(vX).isOpaqueCube())
            {
                TextureAtlasSprite texture = null;

                switch (ritualComponent.getRuneType())
                {
                case BLANK:
                    texture = ritualStoneBlank;
                    break;
                case WATER:
                    texture = ritualStoneWater;
                    break;
                case FIRE:
                    texture = ritualStoneFire;
                    break;
                case EARTH:
                    texture = ritualStoneEarth;
                    break;
                case AIR:
                    texture = ritualStoneAir;
                    break;
                case DAWN:
                    texture = ritualStoneDawn;
                    break;
                case DUSK:
                    texture = ritualStoneDusk;
                    break;
                }

                RenderFakeBlocks.drawFakeBlock(texture, minX, minY, minZ, world);
            }
        }

        GlStateManager.popMatrix();
    }
}