/**
 * @module net/packets/incoming
 */
import { Writer } from '../../writer';
import { Reader } from '../../reader';
import { PacketType } from '../../packet-type';
import { Packet } from '../../packet';
import { TradeItem } from '../../data/trade-item';

/**
 * Received when a new active trade has been initiated.
 */
export class TradeStartPacket implements Packet {

  type = PacketType.TRADESTART;
  propagate = true;

  //#region packet-specific members
  /**
   * A description of the player's inventory. Items 0-3 are the hotbar items,
   * and 4-12 are the 8 inventory slots.
   */
  clientItems: TradeItem[];
  /**
   * The trade partner's name.
   */
  partnerName: string;
  /**
   * A description of the trade partner's inventory. Items 0-3 are the
   * hotbar items, and 4-12 are the 8 inventory slots.
   */
  partnerItems: TradeItem[];
  //#endregion

  constructor() {
    this.clientItems = [];
    this.partnerItems = [];
  }

  read(reader: Reader): void {
    const clientItemsLen = reader.readShort();
    this.clientItems = new Array(clientItemsLen);
    for (let i = 0; i < clientItemsLen; i++) {
      const item = new TradeItem();
      item.read(reader);
      this.clientItems[i] = item;
    }
    this.partnerName = reader.readString();
    const partnerItemsLen = reader.readShort();
    this.partnerItems = new Array(partnerItemsLen);
    for (let i = 0; i < partnerItemsLen; i++) {
      const item = new TradeItem();
      item.read(reader);
      this.partnerItems[i] = item;
    }
  }

  write(writer: Writer): void {
    writer.writeShort(this.clientItems.length);
    for (const item of this.clientItems) {
      item.write(writer);
    }
    writer.writeString(this.partnerName);
    writer.writeShort(this.partnerItems.length);
    for (const item of this.partnerItems) {
      item.write(writer);
    }
  }
}