// 
// 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 ItemQuantity
{
    public static final int NULLABLE_BIT_FIELD_SIZE = 1;
    public static final int FIXED_BLOCK_SIZE = 5;
    public static final int VARIABLE_FIELD_COUNT = 1;
    public static final int VARIABLE_BLOCK_START = 5;
    public static final int MAX_SIZE = 16384010;
    @Nullable
    public String itemId;
    public int quantity;
    
    public ItemQuantity() {
    }
    
    public ItemQuantity(@Nullable final String itemId, final int quantity) {
        this.itemId = itemId;
        this.quantity = quantity;
    }
    
    public ItemQuantity(@Nonnull final ItemQuantity other) {
        this.itemId = other.itemId;
        this.quantity = other.quantity;
    }
    
    @Nonnull
    public static ItemQuantity deserialize(@Nonnull final ByteBuf buf, final int offset) {
        final ItemQuantity obj = new ItemQuantity();
        final byte nullBits = buf.getByte(offset);
        obj.quantity = buf.getIntLE(offset + 1);
        int pos = offset + 5;
        if ((nullBits & 0x1) != 0x0) {
            final int itemIdLen = VarInt.peek(buf, pos);
            if (itemIdLen < 0) {
                throw ProtocolException.negativeLength("ItemId", itemIdLen);
            }
            if (itemIdLen > 4096000) {
                throw ProtocolException.stringTooLong("ItemId", itemIdLen, 4096000);
            }
            final int itemIdVarLen = VarInt.length(buf, pos);
            obj.itemId = PacketIO.readVarString(buf, pos, PacketIO.UTF8);
            pos += itemIdVarLen + itemIdLen;
        }
        return obj;
    }
    
    public static int computeBytesConsumed(@Nonnull final ByteBuf buf, final int offset) {
        final byte nullBits = buf.getByte(offset);
        int pos = offset + 5;
        if ((nullBits & 0x1) != 0x0) {
            final int sl = VarInt.peek(buf, pos);
            pos += VarInt.length(buf, pos) + sl;
        }
        return pos - offset;
    }
    
    public void serialize(@Nonnull final ByteBuf buf) {
        byte nullBits = 0;
        if (this.itemId != null) {
            nullBits |= 0x1;
        }
        buf.writeByte(nullBits);
        buf.writeIntLE(this.quantity);
        if (this.itemId != null) {
            PacketIO.writeVarString(buf, this.itemId, 4096000);
        }
    }
    
    public int computeSize() {
        int size = 5;
        if (this.itemId != null) {
            size += PacketIO.stringSize(this.itemId);
        }
        return size;
    }
    
    public static ValidationResult validateStructure(@Nonnull final ByteBuf buffer, final int offset) {
        if (buffer.readableBytes() - offset < 5) {
            return ValidationResult.error("Buffer too small: expected at least 5 bytes");
        }
        final byte nullBits = buffer.getByte(offset);
        int pos = offset + 5;
        if ((nullBits & 0x1) != 0x0) {
            final int itemIdLen = VarInt.peek(buffer, pos);
            if (itemIdLen < 0) {
                return ValidationResult.error("Invalid string length for ItemId");
            }
            if (itemIdLen > 4096000) {
                return ValidationResult.error("ItemId exceeds max length 4096000");
            }
            pos += VarInt.length(buffer, pos);
            pos += itemIdLen;
            if (pos > buffer.writerIndex()) {
                return ValidationResult.error("Buffer overflow reading ItemId");
            }
        }
        return ValidationResult.OK;
    }
    
    public ItemQuantity clone() {
        final ItemQuantity copy = new ItemQuantity();
        copy.itemId = this.itemId;
        copy.quantity = this.quantity;
        return copy;
    }
    
    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof final ItemQuantity other) {
            return Objects.equals(this.itemId, other.itemId) && this.quantity == other.quantity;
        }
        return false;
    }
    
    @Override
    public int hashCode() {
        return Objects.hash(this.itemId, this.quantity);
    }
}