// 
// Decompiled by Procyon v0.6.0
// 

package com.hypixel.hytale.protocol;

import java.util.Objects;
import java.util.Arrays;
import com.hypixel.hytale.protocol.io.ValidationResult;
import com.hypixel.hytale.protocol.io.PacketIO;
import com.hypixel.hytale.protocol.io.ProtocolException;
import com.hypixel.hytale.protocol.io.VarInt;
import io.netty.buffer.ByteBuf;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;

public class BlockFaceSupport
{
    public static final int NULLABLE_BIT_FIELD_SIZE = 1;
    public static final int FIXED_BLOCK_SIZE = 1;
    public static final int VARIABLE_FIELD_COUNT = 2;
    public static final int VARIABLE_BLOCK_START = 9;
    public static final int MAX_SIZE = 65536019;
    @Nullable
    public String faceType;
    @Nullable
    public Vector3i[] filler;
    
    public BlockFaceSupport() {
    }
    
    public BlockFaceSupport(@Nullable final String faceType, @Nullable final Vector3i[] filler) {
        this.faceType = faceType;
        this.filler = filler;
    }
    
    public BlockFaceSupport(@Nonnull final BlockFaceSupport other) {
        this.faceType = other.faceType;
        this.filler = other.filler;
    }
    
    @Nonnull
    public static BlockFaceSupport deserialize(@Nonnull final ByteBuf buf, final int offset) {
        final BlockFaceSupport obj = new BlockFaceSupport();
        final byte nullBits = buf.getByte(offset);
        if ((nullBits & 0x1) != 0x0) {
            final int varPos0 = offset + 9 + buf.getIntLE(offset + 1);
            final int faceTypeLen = VarInt.peek(buf, varPos0);
            if (faceTypeLen < 0) {
                throw ProtocolException.negativeLength("FaceType", faceTypeLen);
            }
            if (faceTypeLen > 4096000) {
                throw ProtocolException.stringTooLong("FaceType", faceTypeLen, 4096000);
            }
            obj.faceType = PacketIO.readVarString(buf, varPos0, PacketIO.UTF8);
        }
        if ((nullBits & 0x2) != 0x0) {
            final int varPos2 = offset + 9 + buf.getIntLE(offset + 5);
            final int fillerCount = VarInt.peek(buf, varPos2);
            if (fillerCount < 0) {
                throw ProtocolException.negativeLength("Filler", fillerCount);
            }
            if (fillerCount > 4096000) {
                throw ProtocolException.arrayTooLong("Filler", fillerCount, 4096000);
            }
            final int varIntLen = VarInt.length(buf, varPos2);
            if (varPos2 + varIntLen + fillerCount * 12L > buf.readableBytes()) {
                throw ProtocolException.bufferTooSmall("Filler", varPos2 + varIntLen + fillerCount * 12, buf.readableBytes());
            }
            obj.filler = new Vector3i[fillerCount];
            int elemPos = varPos2 + varIntLen;
            for (int i = 0; i < fillerCount; ++i) {
                obj.filler[i] = Vector3i.deserialize(buf, elemPos);
                elemPos += Vector3i.computeBytesConsumed(buf, elemPos);
            }
        }
        return obj;
    }
    
    public static int computeBytesConsumed(@Nonnull final ByteBuf buf, final int offset) {
        final byte nullBits = buf.getByte(offset);
        int maxEnd = 9;
        if ((nullBits & 0x1) != 0x0) {
            final int fieldOffset0 = buf.getIntLE(offset + 1);
            int pos0 = offset + 9 + fieldOffset0;
            final int sl = VarInt.peek(buf, pos0);
            pos0 += VarInt.length(buf, pos0) + sl;
            if (pos0 - offset > maxEnd) {
                maxEnd = pos0 - offset;
            }
        }
        if ((nullBits & 0x2) != 0x0) {
            final int fieldOffset2 = buf.getIntLE(offset + 5);
            int pos2 = offset + 9 + fieldOffset2;
            final int arrLen = VarInt.peek(buf, pos2);
            pos2 += VarInt.length(buf, pos2);
            for (int i = 0; i < arrLen; ++i) {
                pos2 += Vector3i.computeBytesConsumed(buf, pos2);
            }
            if (pos2 - offset > maxEnd) {
                maxEnd = pos2 - offset;
            }
        }
        return maxEnd;
    }
    
    public void serialize(@Nonnull final ByteBuf buf) {
        final int startPos = buf.writerIndex();
        byte nullBits = 0;
        if (this.faceType != null) {
            nullBits |= 0x1;
        }
        if (this.filler != null) {
            nullBits |= 0x2;
        }
        buf.writeByte(nullBits);
        final int faceTypeOffsetSlot = buf.writerIndex();
        buf.writeIntLE(0);
        final int fillerOffsetSlot = buf.writerIndex();
        buf.writeIntLE(0);
        final int varBlockStart = buf.writerIndex();
        if (this.faceType != null) {
            buf.setIntLE(faceTypeOffsetSlot, buf.writerIndex() - varBlockStart);
            PacketIO.writeVarString(buf, this.faceType, 4096000);
        }
        else {
            buf.setIntLE(faceTypeOffsetSlot, -1);
        }
        if (this.filler != null) {
            buf.setIntLE(fillerOffsetSlot, buf.writerIndex() - varBlockStart);
            if (this.filler.length > 4096000) {
                throw ProtocolException.arrayTooLong("Filler", this.filler.length, 4096000);
            }
            VarInt.write(buf, this.filler.length);
            for (final Vector3i item : this.filler) {
                item.serialize(buf);
            }
        }
        else {
            buf.setIntLE(fillerOffsetSlot, -1);
        }
    }
    
    public int computeSize() {
        int size = 9;
        if (this.faceType != null) {
            size += PacketIO.stringSize(this.faceType);
        }
        if (this.filler != null) {
            size += VarInt.size(this.filler.length) + this.filler.length * 12;
        }
        return size;
    }
    
    public static ValidationResult validateStructure(@Nonnull final ByteBuf buffer, final int offset) {
        if (buffer.readableBytes() - offset < 9) {
            return ValidationResult.error("Buffer too small: expected at least 9 bytes");
        }
        final byte nullBits = buffer.getByte(offset);
        if ((nullBits & 0x1) != 0x0) {
            final int faceTypeOffset = buffer.getIntLE(offset + 1);
            if (faceTypeOffset < 0) {
                return ValidationResult.error("Invalid offset for FaceType");
            }
            int pos = offset + 9 + faceTypeOffset;
            if (pos >= buffer.writerIndex()) {
                return ValidationResult.error("Offset out of bounds for FaceType");
            }
            final int faceTypeLen = VarInt.peek(buffer, pos);
            if (faceTypeLen < 0) {
                return ValidationResult.error("Invalid string length for FaceType");
            }
            if (faceTypeLen > 4096000) {
                return ValidationResult.error("FaceType exceeds max length 4096000");
            }
            pos += VarInt.length(buffer, pos);
            pos += faceTypeLen;
            if (pos > buffer.writerIndex()) {
                return ValidationResult.error("Buffer overflow reading FaceType");
            }
        }
        if ((nullBits & 0x2) != 0x0) {
            final int fillerOffset = buffer.getIntLE(offset + 5);
            if (fillerOffset < 0) {
                return ValidationResult.error("Invalid offset for Filler");
            }
            int pos = offset + 9 + fillerOffset;
            if (pos >= buffer.writerIndex()) {
                return ValidationResult.error("Offset out of bounds for Filler");
            }
            final int fillerCount = VarInt.peek(buffer, pos);
            if (fillerCount < 0) {
                return ValidationResult.error("Invalid array count for Filler");
            }
            if (fillerCount > 4096000) {
                return ValidationResult.error("Filler exceeds max length 4096000");
            }
            pos += VarInt.length(buffer, pos);
            pos += fillerCount * 12;
            if (pos > buffer.writerIndex()) {
                return ValidationResult.error("Buffer overflow reading Filler");
            }
        }
        return ValidationResult.OK;
    }
    
    public BlockFaceSupport clone() {
        final BlockFaceSupport copy = new BlockFaceSupport();
        copy.faceType = this.faceType;
        copy.filler = (Vector3i[])((this.filler != null) ? ((Vector3i[])Arrays.stream(this.filler).map(e -> e.clone()).toArray(Vector3i[]::new)) : null);
        return copy;
    }
    
    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof final BlockFaceSupport other) {
            return Objects.equals(this.faceType, other.faceType) && Arrays.equals(this.filler, other.filler);
        }
        return false;
    }
    
    @Override
    public int hashCode() {
        int result = 1;
        result = 31 * result + Objects.hashCode(this.faceType);
        result = 31 * result + Arrays.hashCode(this.filler);
        return result;
    }
}