package net.lax1dude.eaglercraft.v1_8.plugin.backend_rpc_protocol.pkt.client;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

import net.lax1dude.eaglercraft.v1_8.plugin.backend_rpc_protocol.pkt.EaglerBackendRPCHandler;
import net.lax1dude.eaglercraft.v1_8.plugin.backend_rpc_protocol.pkt.EaglerBackendRPCPacket;

/**
 * Copyright (c) 2024 lax1dude. All Rights Reserved.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 */
public class CPacketRPCSendWebViewMessage implements EaglerBackendRPCPacket {

	public static final int MESSAGE_TYPE_STRING = 0;
	public static final int MESSAGE_TYPE_BINARY = 1;

	public String channelName;
	public int messageType;
	public byte[] messageContent;

	public CPacketRPCSendWebViewMessage() {
	}

	public CPacketRPCSendWebViewMessage(String channelName, int messageType, byte[] messageContent) {
		this.channelName = channelName;
		this.messageType = messageType;
		this.messageContent = messageContent;
	}

	@Override
	public void readPacket(DataInput buffer) throws IOException {
		byte[] nameBytes = new byte[buffer.readUnsignedByte()];
		buffer.readFully(nameBytes);
		channelName = new String(nameBytes, StandardCharsets.US_ASCII);
		messageType = buffer.readUnsignedByte();
		messageContent = new byte[buffer.readUnsignedShort()];
		buffer.readFully(messageContent);
	}

	@Override
	public void writePacket(DataOutput buffer) throws IOException {
		if(channelName == null || channelName.length() == 0) {
			throw new IOException("Channel name cannot be empty!");
		}
		if(channelName.length() > 255) {
			throw new IOException("Channel name cannot be more than 255 chars! (got " + channelName.length() + " chars)");
		}
		if(messageContent == null) {
			throw new IOException("Message contents cannot be null!");
		}
		if(messageContent.length > 32720) {
			throw new IOException("Message contents cannot be more then 32720 bytes! (got " + messageContent.length + " bytes)");
		}
		byte[] nameBytes = channelName.getBytes(StandardCharsets.US_ASCII);
		buffer.writeByte(nameBytes.length);
		buffer.write(nameBytes);
		buffer.writeByte(messageType);
		buffer.writeShort(messageContent.length);
		buffer.write(messageContent);
	}

	@Override
	public void handlePacket(EaglerBackendRPCHandler handler) {
		handler.handleClient(this);
	}

	@Override
	public int length() {
		return 4 + channelName.length() + messageContent.length;
	}

}
