package com.thebrokenrail.gulliverreloaded.mixin;

import com.thebrokenrail.gulliverreloaded.GulliverReloaded;
import com.thebrokenrail.gulliverreloaded.ScaledEntity;
import net.minecraft.entity.EntityDimensions;
import net.minecraft.entity.EntityPose;
import net.minecraft.entity.LivingEntity;
import net.minecraft.entity.data.DataTracker;
import net.minecraft.entity.data.TrackedData;
import net.minecraft.entity.data.TrackedDataHandlerRegistry;
import net.minecraft.entity.effect.StatusEffect;
import net.minecraft.entity.effect.StatusEffectInstance;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.Shadow;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Inject;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;

import java.util.Map;

@SuppressWarnings("unused")
@Mixin(LivingEntity.class)
public abstract class MixinLivingEntity implements ScaledEntity {
    private static final TrackedData<Float> SCALE = DataTracker.registerData(LivingEntity.class, TrackedDataHandlerRegistry.FLOAT);

    @Shadow
    public abstract Map<StatusEffect, StatusEffectInstance> getActiveStatusEffects();

    @Override
    public float getScale() {
        return ((LivingEntity) (Object) this).getDataTracker().get(SCALE);
    }

    private float computeScale() {
        Map<StatusEffect, StatusEffectInstance> effects = getActiveStatusEffects();
        if (effects != null && effects.size() > 0) {
            int shrink = effects.get(GulliverReloaded.SHRINK_EFFECT.getStatusEffect()) != null ? effects.get(GulliverReloaded.SHRINK_EFFECT.getStatusEffect()).getAmplifier() + 1 : 0;
            int grow = effects.get(GulliverReloaded.GROW_EFFECT.getStatusEffect()) != null ? effects.get(GulliverReloaded.GROW_EFFECT.getStatusEffect()).getAmplifier() + 1 : 0;
            float value = grow - shrink;
            if (value > 0) {
                return (float) Math.pow(2f, value);
            } else {
                return (float) Math.pow(0.5f, Math.abs(value));
            }
        } else {
            return 1f;
        }
    }

    @Inject(at = @At("RETURN"), method = "getDimensions", cancellable = true)
    public void getDimensions(EntityPose pose, CallbackInfoReturnable<EntityDimensions> info) {
        info.setReturnValue(scaleDimensions(info.getReturnValue()));
    }

    @Override
    public EntityDimensions scaleDimensions(EntityDimensions dimensions) {
        float scale = getScale();
        return new EntityDimensions(Math.max(dimensions.width * scale, 0.5f), Math.max(dimensions.height * scale, 0.5f), dimensions.fixed);
    }

    @Inject(at = @At("RETURN"), method = "getJumpVelocity", cancellable = true)
    public void getJumpVelocity(CallbackInfoReturnable<Float> info) {
        info.setReturnValue(info.getReturnValue() * (float) Math.pow(getScale(), 0.2f));
    }

    @Inject(at = @At("RETURN"), method = "getMovementSpeed()F", cancellable = true)
    public void getMovementSpeed(CallbackInfoReturnable<Float> info) {
        info.setReturnValue(info.getReturnValue() * (float) Math.pow(getScale(), 0.2f));
    }

    @Inject(at = @At("RETURN"), method = "getEyeHeight", cancellable = true)
    public void getEyeHeight(EntityPose pose, EntityDimensions dimensions, CallbackInfoReturnable<Float> info) {
        if (pose != EntityPose.SLEEPING) {
            info.setReturnValue(info.getReturnValue() * getScale());
        }
    }

    @Inject(at = @At("HEAD"), method = "tick")
    public void tick(CallbackInfo info) {
        if (!((LivingEntity) (Object) this).getEntityWorld().isClient()) {
            ((LivingEntity) (Object) this).getDataTracker().set(SCALE, computeScale());
        }
    }

    @Inject(at = @At("RETURN"), method = "initDataTracker")
    public void initDataTracker(CallbackInfo info) {
        ((LivingEntity) (Object) this).getDataTracker().startTracking(SCALE, 1f);
    }

    @Inject(at = @At("RETURN"), method = "onTrackedDataSet")
    public void onTrackedDataSet(TrackedData<?> data, CallbackInfo info) {
        if (SCALE.equals(data)) {
            ((LivingEntity) (Object) this).calculateDimensions();
        }
    }
}