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

package com.hypixel.hytale.protocol;

import java.util.Arrays;
import com.hypixel.hytale.protocol.io.ValidationResult;
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 HitEntity
{
    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 = 8192010;
    public int next;
    @Nullable
    public EntityMatcher[] matchers;
    
    public HitEntity() {
    }
    
    public HitEntity(final int next, @Nullable final EntityMatcher[] matchers) {
        this.next = next;
        this.matchers = matchers;
    }
    
    public HitEntity(@Nonnull final HitEntity other) {
        this.next = other.next;
        this.matchers = other.matchers;
    }
    
    @Nonnull
    public static HitEntity deserialize(@Nonnull final ByteBuf buf, final int offset) {
        final HitEntity obj = new HitEntity();
        final byte nullBits = buf.getByte(offset);
        obj.next = buf.getIntLE(offset + 1);
        int pos = offset + 5;
        if ((nullBits & 0x1) != 0x0) {
            final int matchersCount = VarInt.peek(buf, pos);
            if (matchersCount < 0) {
                throw ProtocolException.negativeLength("Matchers", matchersCount);
            }
            if (matchersCount > 4096000) {
                throw ProtocolException.arrayTooLong("Matchers", matchersCount, 4096000);
            }
            final int matchersVarLen = VarInt.size(matchersCount);
            if (pos + matchersVarLen + matchersCount * 2L > buf.readableBytes()) {
                throw ProtocolException.bufferTooSmall("Matchers", pos + matchersVarLen + matchersCount * 2, buf.readableBytes());
            }
            pos += matchersVarLen;
            obj.matchers = new EntityMatcher[matchersCount];
            for (int i = 0; i < matchersCount; ++i) {
                obj.matchers[i] = EntityMatcher.deserialize(buf, pos);
                pos += EntityMatcher.computeBytesConsumed(buf, pos);
            }
        }
        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 arrLen = VarInt.peek(buf, pos);
            pos += VarInt.length(buf, pos);
            for (int i = 0; i < arrLen; ++i) {
                pos += EntityMatcher.computeBytesConsumed(buf, pos);
            }
        }
        return pos - offset;
    }
    
    public void serialize(@Nonnull final ByteBuf buf) {
        byte nullBits = 0;
        if (this.matchers != null) {
            nullBits |= 0x1;
        }
        buf.writeByte(nullBits);
        buf.writeIntLE(this.next);
        if (this.matchers != null) {
            if (this.matchers.length > 4096000) {
                throw ProtocolException.arrayTooLong("Matchers", this.matchers.length, 4096000);
            }
            VarInt.write(buf, this.matchers.length);
            for (final EntityMatcher item : this.matchers) {
                item.serialize(buf);
            }
        }
    }
    
    public int computeSize() {
        int size = 5;
        if (this.matchers != null) {
            size += VarInt.size(this.matchers.length) + this.matchers.length * 2;
        }
        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 matchersCount = VarInt.peek(buffer, pos);
            if (matchersCount < 0) {
                return ValidationResult.error("Invalid array count for Matchers");
            }
            if (matchersCount > 4096000) {
                return ValidationResult.error("Matchers exceeds max length 4096000");
            }
            pos += VarInt.length(buffer, pos);
            pos += matchersCount * 2;
            if (pos > buffer.writerIndex()) {
                return ValidationResult.error("Buffer overflow reading Matchers");
            }
        }
        return ValidationResult.OK;
    }
    
    public HitEntity clone() {
        final HitEntity copy = new HitEntity();
        copy.next = this.next;
        copy.matchers = (EntityMatcher[])((this.matchers != null) ? ((EntityMatcher[])Arrays.stream(this.matchers).map(e -> e.clone()).toArray(EntityMatcher[]::new)) : null);
        return copy;
    }
    
    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof final HitEntity other) {
            return this.next == other.next && Arrays.equals(this.matchers, other.matchers);
        }
        return false;
    }
    
    @Override
    public int hashCode() {
        int result = 1;
        result = 31 * result + Integer.hashCode(this.next);
        result = 31 * result + Arrays.hashCode(this.matchers);
        return result;
    }
}