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

package com.hypixel.hytale.protocol;

import java.util.Objects;
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 BlockIdMatcher
{
    public static final int NULLABLE_BIT_FIELD_SIZE = 1;
    public static final int FIXED_BLOCK_SIZE = 5;
    public static final int VARIABLE_FIELD_COUNT = 2;
    public static final int VARIABLE_BLOCK_START = 13;
    public static final int MAX_SIZE = 32768023;
    @Nullable
    public String id;
    @Nullable
    public String state;
    public int tagIndex;
    
    public BlockIdMatcher() {
    }
    
    public BlockIdMatcher(@Nullable final String id, @Nullable final String state, final int tagIndex) {
        this.id = id;
        this.state = state;
        this.tagIndex = tagIndex;
    }
    
    public BlockIdMatcher(@Nonnull final BlockIdMatcher other) {
        this.id = other.id;
        this.state = other.state;
        this.tagIndex = other.tagIndex;
    }
    
    @Nonnull
    public static BlockIdMatcher deserialize(@Nonnull final ByteBuf buf, final int offset) {
        final BlockIdMatcher obj = new BlockIdMatcher();
        final byte nullBits = buf.getByte(offset);
        obj.tagIndex = buf.getIntLE(offset + 1);
        if ((nullBits & 0x1) != 0x0) {
            final int varPos0 = offset + 13 + buf.getIntLE(offset + 5);
            final int idLen = VarInt.peek(buf, varPos0);
            if (idLen < 0) {
                throw ProtocolException.negativeLength("Id", idLen);
            }
            if (idLen > 4096000) {
                throw ProtocolException.stringTooLong("Id", idLen, 4096000);
            }
            obj.id = PacketIO.readVarString(buf, varPos0, PacketIO.UTF8);
        }
        if ((nullBits & 0x2) != 0x0) {
            final int varPos2 = offset + 13 + buf.getIntLE(offset + 9);
            final int stateLen = VarInt.peek(buf, varPos2);
            if (stateLen < 0) {
                throw ProtocolException.negativeLength("State", stateLen);
            }
            if (stateLen > 4096000) {
                throw ProtocolException.stringTooLong("State", stateLen, 4096000);
            }
            obj.state = PacketIO.readVarString(buf, varPos2, PacketIO.UTF8);
        }
        return obj;
    }
    
    public static int computeBytesConsumed(@Nonnull final ByteBuf buf, final int offset) {
        final byte nullBits = buf.getByte(offset);
        int maxEnd = 13;
        if ((nullBits & 0x1) != 0x0) {
            final int fieldOffset0 = buf.getIntLE(offset + 5);
            int pos0 = offset + 13 + 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 + 9);
            int pos2 = offset + 13 + fieldOffset2;
            final int sl = VarInt.peek(buf, pos2);
            pos2 += VarInt.length(buf, pos2) + sl;
            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.id != null) {
            nullBits |= 0x1;
        }
        if (this.state != null) {
            nullBits |= 0x2;
        }
        buf.writeByte(nullBits);
        buf.writeIntLE(this.tagIndex);
        final int idOffsetSlot = buf.writerIndex();
        buf.writeIntLE(0);
        final int stateOffsetSlot = buf.writerIndex();
        buf.writeIntLE(0);
        final int varBlockStart = buf.writerIndex();
        if (this.id != null) {
            buf.setIntLE(idOffsetSlot, buf.writerIndex() - varBlockStart);
            PacketIO.writeVarString(buf, this.id, 4096000);
        }
        else {
            buf.setIntLE(idOffsetSlot, -1);
        }
        if (this.state != null) {
            buf.setIntLE(stateOffsetSlot, buf.writerIndex() - varBlockStart);
            PacketIO.writeVarString(buf, this.state, 4096000);
        }
        else {
            buf.setIntLE(stateOffsetSlot, -1);
        }
    }
    
    public int computeSize() {
        int size = 13;
        if (this.id != null) {
            size += PacketIO.stringSize(this.id);
        }
        if (this.state != null) {
            size += PacketIO.stringSize(this.state);
        }
        return size;
    }
    
    public static ValidationResult validateStructure(@Nonnull final ByteBuf buffer, final int offset) {
        if (buffer.readableBytes() - offset < 13) {
            return ValidationResult.error("Buffer too small: expected at least 13 bytes");
        }
        final byte nullBits = buffer.getByte(offset);
        if ((nullBits & 0x1) != 0x0) {
            final int idOffset = buffer.getIntLE(offset + 5);
            if (idOffset < 0) {
                return ValidationResult.error("Invalid offset for Id");
            }
            int pos = offset + 13 + idOffset;
            if (pos >= buffer.writerIndex()) {
                return ValidationResult.error("Offset out of bounds for Id");
            }
            final int idLen = VarInt.peek(buffer, pos);
            if (idLen < 0) {
                return ValidationResult.error("Invalid string length for Id");
            }
            if (idLen > 4096000) {
                return ValidationResult.error("Id exceeds max length 4096000");
            }
            pos += VarInt.length(buffer, pos);
            pos += idLen;
            if (pos > buffer.writerIndex()) {
                return ValidationResult.error("Buffer overflow reading Id");
            }
        }
        if ((nullBits & 0x2) != 0x0) {
            final int stateOffset = buffer.getIntLE(offset + 9);
            if (stateOffset < 0) {
                return ValidationResult.error("Invalid offset for State");
            }
            int pos = offset + 13 + stateOffset;
            if (pos >= buffer.writerIndex()) {
                return ValidationResult.error("Offset out of bounds for State");
            }
            final int stateLen = VarInt.peek(buffer, pos);
            if (stateLen < 0) {
                return ValidationResult.error("Invalid string length for State");
            }
            if (stateLen > 4096000) {
                return ValidationResult.error("State exceeds max length 4096000");
            }
            pos += VarInt.length(buffer, pos);
            pos += stateLen;
            if (pos > buffer.writerIndex()) {
                return ValidationResult.error("Buffer overflow reading State");
            }
        }
        return ValidationResult.OK;
    }
    
    public BlockIdMatcher clone() {
        final BlockIdMatcher copy = new BlockIdMatcher();
        copy.id = this.id;
        copy.state = this.state;
        copy.tagIndex = this.tagIndex;
        return copy;
    }
    
    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof final BlockIdMatcher other) {
            return Objects.equals(this.id, other.id) && Objects.equals(this.state, other.state) && this.tagIndex == other.tagIndex;
        }
        return false;
    }
    
    @Override
    public int hashCode() {
        return Objects.hash(this.id, this.state, this.tagIndex);
    }
}