EnergonRelics/src/main/java/com/thebrokenrail/energonrelics/block/entity/SolarPanelBlockEntity.java

package com.thebrokenrail.energonrelics.block.entity;

import com.thebrokenrail.energonrelics.api.block.entity.helper.EnergyGeneratorBlockEntity;
import com.thebrokenrail.energonrelics.config.HardcodedConfig;
import com.thebrokenrail.energonrelics.api.energy.tick.EnergyTickable;
import net.minecraft.block.entity.BlockEntityType;
import net.minecraft.util.math.Direction;
import net.minecraft.util.math.MathHelper;
import net.minecraft.world.LightType;

import java.util.List;
import java.util.Objects;

public class SolarPanelBlockEntity extends EnergyGeneratorBlockEntity {
    public SolarPanelBlockEntity(BlockEntityType<?> type) {
        super(type);
    }

    private int getLight(Direction side) {
        assert getWorld() != null;
        return getWorld().getLightLevel(LightType.SKY, getPos().offset(side)) - getWorld().getAmbientDarkness();
    }

    private int getLight() {
        int light = 0;
        for (Direction side : Direction.values()) {
            light = Math.max(light, getLight(side));
        }
        return (int) (((float) light) * Math.max(0, MathHelper.cos(Objects.requireNonNull(getWorld()).getSkyAngleRadians(1f))));
    }

    @Override
    public long getDisplayEnergy() {
        if (hasWorld() && Objects.requireNonNull(getWorld()).getDimension().hasSkyLight()) {
            int light = getLight();
            return (long) ((float) HardcodedConfig.SOLAR_PANEL_MAX_ENERGY_OUTPUT * ((float) light / 15f));
        } else {
            return 0;
        }
    }

    @Override
    public List<EnergyTickable> startTick() {
        setEnergy(getDisplayEnergy());
        return super.startTick();
    }
}