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package gregtech.api.interfaces.tileentity;

import cofh.api.energy.IEnergyReceiver;
import gregtech.api.GregTech_API;
import gregtech.api.util.GT_Utility;
import ic2.api.energy.tile.IEnergySink;
import net.minecraft.tileentity.TileEntity;
import net.minecraftforge.common.util.ForgeDirection;

/**
 * Interface for getting Connected to the GregTech Energy Network.
 * <p/>
 * This is all you need to connect to the GT Network.
 * IColoredTileEntity is needed for not connecting differently coloured Blocks to each other.
 * IHasWorldObjectAndCoords is needed for the InWorld related Stuff. @BaseTileEntity does implement most of that Interface.
 */
public interface IEnergyConnected extends IColoredTileEntity, IHasWorldObjectAndCoords {
    /**
     * Inject Energy Call for Electricity. Gets called by EnergyEmitters to inject Energy into your Block
     * <p/>
     * Note: you have to check for @inputEnergyFrom because the Network won't check for that by itself.
     *
     * @param aSide 0 - 5 = Vanilla Directions of YOUR Block the Energy gets inserted to. 6 = No specific Side (don't do Side checks for this Side)
     * @return amount of used Amperes. 0 if not accepted anything.
     */
    long injectEnergyUnits(byte aSide, long aVoltage, long aAmperage);

    /**
     * Sided Energy Input
     */
    boolean inputEnergyFrom(byte aSide);

    default boolean inputEnergyFrom(byte aSide, boolean waitForActive) {
        return inputEnergyFrom(aSide);
    }

    /**
     * Sided Energy Output
     */
    boolean outputsEnergyTo(byte aSide);

    default boolean outputsEnergyTo(byte aSide, boolean waitForActive) {
        return outputsEnergyTo(aSide);
    }

    /**
     * Utility for the Network
     */
    final class Util {
        /**
         * Emits Energy to the E-net. Also compatible with adjacent IC2 TileEntities.
         *
         * @return the used Amperage.
         */
        public static long emitEnergyToNetwork(long aVoltage, long aAmperage, IEnergyConnected aEmitter) {
            long rUsedAmperes = 0;
            for (byte i = 0, j = 0; i < 6 && aAmperage > rUsedAmperes; i++) {
                if (aEmitter.outputsEnergyTo(i)) {
                    j = GT_Utility.getOppositeSide(i);
                    final TileEntity tTileEntity = aEmitter.getTileEntityAtSide(i);
                    if (tTileEntity instanceof IEnergyConnected) {
                        if (aEmitter.getColorization() >= 0) {
                            final byte tColor = ((IEnergyConnected) tTileEntity).getColorization();
                            if (tColor >= 0 && tColor != aEmitter.getColorization()) continue;
                        }
                        rUsedAmperes += ((IEnergyConnected) tTileEntity)
                                .injectEnergyUnits(j, aVoltage, aAmperage - rUsedAmperes);

                    } else if (tTileEntity instanceof IEnergySink) {
                        if (((IEnergySink) tTileEntity)
                                .acceptsEnergyFrom((TileEntity) aEmitter, ForgeDirection.getOrientation(j))) {
                            while (aAmperage > rUsedAmperes
                                    && ((IEnergySink) tTileEntity).getDemandedEnergy() > 0
                                    && ((IEnergySink) tTileEntity)
                                                    .injectEnergy(ForgeDirection.getOrientation(j), aVoltage, aVoltage)
                                            < aVoltage) rUsedAmperes++;
                        }
                    } else if (GregTech_API.mOutputRF && tTileEntity instanceof IEnergyReceiver) {
                        final ForgeDirection tDirection =
                                ForgeDirection.getOrientation(i).getOpposite();
                        final int rfOut = GT_Utility.safeInt(aVoltage * GregTech_API.mEUtoRF / 100);
                        if (((IEnergyReceiver) tTileEntity).receiveEnergy(tDirection, rfOut, true) == rfOut) {
                            ((IEnergyReceiver) tTileEntity).receiveEnergy(tDirection, rfOut, false);
                            rUsedAmperes++;
                        }
                    }
                }
            }
            return rUsedAmperes;
        }
    }
}