package electroblob.wizardry.spell;

import electroblob.wizardry.advancement.AdvancementHelper;
import electroblob.wizardry.advancement.AdvancementHelper.EnumAdvancement;
import electroblob.wizardry.constants.Element;
import electroblob.wizardry.constants.SpellType;
import electroblob.wizardry.constants.Tier;
import electroblob.wizardry.util.SpellModifiers;
import electroblob.wizardry.util.WizardryUtilities;
import net.minecraft.entity.EntityLiving;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.effect.EntityLightningBolt;
import net.minecraft.entity.monster.EntityCreeper;
import net.minecraft.entity.passive.EntityPig;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.EnumAction;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.EnumHand;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.RayTraceResult;
import net.minecraft.world.World;
import net.minecraftforge.event.entity.EntityStruckByLightningEvent;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

@Mod.EventBusSubscriber
public class LightningBolt extends Spell {

	/** The NBT key used to store the UUID of the player that summoned the lightning bolt. Used for achievements. */
	public static final String NBT_KEY = "summoningPlayer";

	public LightningBolt(){
		super(Tier.ADVANCED, 40, Element.LIGHTNING, "lightning_bolt", SpellType.ATTACK, 80, EnumAction.NONE, false);
	}

	@Override
	public boolean doesSpellRequirePacket(){
		return false;
	}

	@Override
	public boolean cast(World world, EntityPlayer caster, EnumHand hand, int ticksInUse, SpellModifiers modifiers){

		RayTraceResult rayTrace = WizardryUtilities.rayTrace(200, world, caster, false);

		if(rayTrace != null && rayTrace.typeOfHit == RayTraceResult.Type.BLOCK){

			BlockPos pos = rayTrace.getBlockPos();

			// Not sure why it is up 1 but it has to be for canBlockSeeSky to work properly.
			// TODO: Remove this requirement?
			if(world.canBlockSeeSky(pos.up())){

				if(!world.isRemote){
					EntityLightningBolt entitylightning = new EntityLightningBolt(world, pos.getX(), pos.getY(),
							pos.getZ(), false);
					world.addWeatherEffect(entitylightning);

					// Code for eventhandler recognition; for achievements and such like. Left in for future use.
					NBTTagCompound entityNBT = entitylightning.getEntityData();
					entityNBT.setUniqueId(NBT_KEY, caster.getUniqueID());
				}

				caster.swingArm(hand);
				return true;
			}
		}

		return false;
	}

	@Override
	public boolean cast(World world, EntityLiving caster, EnumHand hand, int ticksInUse, EntityLivingBase target,
			SpellModifiers modifiers){

		if(target != null){

			int x = (int)target.posX;
			int y = (int)target.posY;
			int z = (int)target.posZ;

			// Not sure why it is up 1 but it has to be for canBlockSeeSky to work properly.
			// TODO: Remove this requirement?
			if(world.canBlockSeeSky(new BlockPos(x, y, z))){

				if(!world.isRemote){
					EntityLightningBolt entitylightning = new EntityLightningBolt(world, x, y, z, false);
					world.addWeatherEffect(entitylightning);
				}

				caster.swingArm(hand);
				return true;
			}
		}

		return false;
	}

	@Override
	public boolean canBeCastByNPCs(){
		return true;
	}

	@SubscribeEvent
	public static void onEntityStruckByLightningEvent(EntityStruckByLightningEvent event){

		if(event.getLightning().getEntityData() != null && event.getLightning().getEntityData().hasUniqueId(NBT_KEY)){

			EntityPlayer player = (EntityPlayer)WizardryUtilities.getEntityByUUID(event.getLightning().world,
					event.getLightning().getEntityData().getUniqueId("summoningPlayer"));

			if(event.getEntity() instanceof EntityCreeper){
				AdvancementHelper.grantAdvancement(player, EnumAdvancement.charge_creeper);
			}

			if(event.getEntity() instanceof EntityPig){
				AdvancementHelper.grantAdvancement(player, EnumAdvancement.frankenstein);
			}
		}

	}
}