/*
 * Copyright © 2004-2021 L2J Server
 * 
 * This file is part of L2J Server.
 * 
 * L2J Server is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * L2J Server is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.l2jserver.gameserver.network.clientpackets;

import static com.l2jserver.gameserver.config.Configuration.character;
import static com.l2jserver.gameserver.config.Configuration.general;
import static com.l2jserver.gameserver.config.Configuration.rates;
import static com.l2jserver.gameserver.model.actor.L2Npc.INTERACTION_DISTANCE;

import java.util.ArrayList;
import java.util.List;

import com.l2jserver.gameserver.data.xml.impl.BuyListData;
import com.l2jserver.gameserver.model.L2Object;
import com.l2jserver.gameserver.model.actor.L2Character;
import com.l2jserver.gameserver.model.actor.instance.L2MerchantInstance;
import com.l2jserver.gameserver.model.actor.instance.L2PcInstance;
import com.l2jserver.gameserver.model.buylist.L2BuyList;
import com.l2jserver.gameserver.model.buylist.Product;
import com.l2jserver.gameserver.model.holders.ItemHolder;
import com.l2jserver.gameserver.network.SystemMessageId;
import com.l2jserver.gameserver.network.serverpackets.ActionFailed;
import com.l2jserver.gameserver.network.serverpackets.ExBuySellList;
import com.l2jserver.gameserver.network.serverpackets.StatusUpdate;
import com.l2jserver.gameserver.network.serverpackets.SystemMessage;
import com.l2jserver.gameserver.util.Util;

public final class RequestBuyItem extends L2GameClientPacket {
	private static final String _C__40_REQUESTBUYITEM = "[C] 40 RequestBuyItem";
	
	private static final int BATCH_LENGTH = 12;
	private int _listId;
	private List<ItemHolder> _items = null;
	
	@Override
	protected void readImpl() {
		_listId = readD();
		int size = readD();
		if ((size <= 0) || (size > MAX_ITEM_IN_PACKET) || ((size * BATCH_LENGTH) != _buf.remaining())) {
			return;
		}
		
		_items = new ArrayList<>(size);
		for (int i = 0; i < size; i++) {
			int itemId = readD();
			long count = readQ();
			if ((itemId < 1) || (count < 1)) {
				_items = null;
				return;
			}
			_items.add(new ItemHolder(itemId, count));
		}
	}
	
	@Override
	protected void runImpl() {
		L2PcInstance player = getClient().getActiveChar();
		if (player == null) {
			return;
		}
		
		if (!getClient().getFloodProtectors().getTransaction().tryPerformAction("buy")) {
			player.sendMessage("You are buying too fast.");
			return;
		}
		
		if (_items == null) {
			sendPacket(ActionFailed.STATIC_PACKET);
			return;
		}
		
		// Karma punishment
		if (!character().karmaPlayerCanShop() && (player.getKarma() > 0)) {
			sendPacket(ActionFailed.STATIC_PACKET);
			return;
		}
		
		L2Object target = player.getTarget();
		L2Character merchant = null;
		if (!player.isGM()) {
			if (!(target instanceof L2MerchantInstance) || (!player.isInsideRadius(target, INTERACTION_DISTANCE, true, false)) || (player.getInstanceId() != target.getInstanceId())) {
				sendPacket(ActionFailed.STATIC_PACKET);
				return;
			}
			merchant = (L2Character) target;
		}
		
		double castleTaxRate = 0;
		double baseTaxRate = 0;
		
		if ((merchant == null) && !player.isGM()) {
			sendPacket(ActionFailed.STATIC_PACKET);
			return;
		}
		
		final L2BuyList buyList = BuyListData.getInstance().getBuyList(_listId);
		if (buyList == null) {
			Util.handleIllegalPlayerAction(player, "Warning!! Character " + player.getName() + " of account " + player.getAccountName() + " sent a false BuyList list_id " + _listId);
			return;
		}
		
		if (merchant != null) {
			if (!buyList.isNpcAllowed(merchant.getId())) {
				sendPacket(ActionFailed.STATIC_PACKET);
				return;
			}
			
			if (merchant instanceof L2MerchantInstance) {
				castleTaxRate = ((L2MerchantInstance) merchant).getMpc().getCastleTaxRate();
				baseTaxRate = ((L2MerchantInstance) merchant).getMpc().getBaseTaxRate();
			} else {
				baseTaxRate = 0.5;
			}
		}
		
		long subTotal = 0;
		
		// Check for buylist validity and calculates summary values
		long slots = 0;
		long weight = 0;
		for (ItemHolder i : _items) {
			long price;
			
			final Product product = buyList.getProductByItemId(i.getId());
			if (product == null) {
				Util.handleIllegalPlayerAction(player, "Warning!! Character " + player.getName() + " of account " + player.getAccountName() + " sent a false BuyList list_id " + _listId + " and item_id " + i.getId());
				return;
			}
			
			if (!product.getItem().isStackable() && (i.getCount() > 1)) {
				Util.handleIllegalPlayerAction(player, "Warning!! Character " + player.getName() + " of account " + player.getAccountName() + " tried to purchase invalid quantity of items at the same time.");
				sendPacket(SystemMessage.getSystemMessage(SystemMessageId.YOU_HAVE_EXCEEDED_QUANTITY_THAT_CAN_BE_INPUTTED));
				return;
			}
			
			price = product.getPrice();
			if ((product.getItemId() >= 3960) && (product.getItemId() <= 4026)) {
				price *= rates().getRateSiegeGuardsPrice();
			}
			
			if (price < 0) {
				_log.warning("ERROR, no price found .. wrong buylist ??");
				sendPacket(ActionFailed.STATIC_PACKET);
				return;
			}
			
			if ((price == 0) && !player.isGM() && general().onlyGMItemsFree()) {
				player.sendMessage("Ohh... Cheat didn't work? You have a problem now!");
				Util.handleIllegalPlayerAction(player, "Warning!! Character " + player.getName() + " of account " + player.getAccountName() + " tried buy item for 0 adena.");
				return;
			}
			
			if (product.hasLimitedStock()) {
				// trying to buy more then available
				if (i.getCount() > product.getCount()) {
					sendPacket(ActionFailed.STATIC_PACKET);
					return;
				}
			}
			
			if ((character().getMaxAdena() / i.getCount()) < price) {
				Util.handleIllegalPlayerAction(player, "Warning!! Character " + player.getName() + " of account " + player.getAccountName() + " tried to purchase over " + character().getMaxAdena() + " adena worth of goods.");
				return;
			}
			// first calculate price per item with tax, then multiply by count
			price = (long) (price * (1 + castleTaxRate + baseTaxRate));
			subTotal += i.getCount() * price;
			if (subTotal > character().getMaxAdena()) {
				Util.handleIllegalPlayerAction(player, "Warning!! Character " + player.getName() + " of account " + player.getAccountName() + " tried to purchase over " + character().getMaxAdena() + " adena worth of goods.");
				return;
			}
			
			weight += i.getCount() * product.getItem().getWeight();
			if (player.getInventory().getItemByItemId(product.getItemId()) == null) {
				slots++;
			}
		}
		
		if (!player.isGM() && ((weight > Integer.MAX_VALUE) || (weight < 0) || !player.getInventory().validateWeight((int) weight))) {
			player.sendPacket(SystemMessageId.WEIGHT_LIMIT_EXCEEDED);
			sendPacket(ActionFailed.STATIC_PACKET);
			return;
		}
		
		if (!player.isGM() && ((slots > Integer.MAX_VALUE) || (slots < 0) || !player.getInventory().validateCapacity((int) slots))) {
			player.sendPacket(SystemMessageId.SLOTS_FULL);
			sendPacket(ActionFailed.STATIC_PACKET);
			return;
		}
		
		// Charge buyer and add tax to castle treasury if not owned by npc clan
		if ((subTotal < 0) || !player.reduceAdena("Buy", subTotal, player.getLastFolkNPC(), false)) {
			player.sendPacket(SystemMessageId.YOU_NOT_ENOUGH_ADENA);
			sendPacket(ActionFailed.STATIC_PACKET);
			return;
		}
		
		// Proceed the purchase
		for (ItemHolder i : _items) {
			Product product = buyList.getProductByItemId(i.getId());
			if (product == null) {
				Util.handleIllegalPlayerAction(player, "Warning!! Character " + player.getName() + " of account " + player.getAccountName() + " sent a false BuyList list_id " + _listId + " and item_id " + i.getId());
				continue;
			}
			
			if (product.hasLimitedStock()) {
				if (product.decreaseCount(i.getCount())) {
					player.getInventory().addItem("Buy", i.getId(), i.getCount(), player, merchant);
				}
			} else {
				player.getInventory().addItem("Buy", i.getId(), i.getCount(), player, merchant);
			}
		}
		
		// add to castle treasury
		if (merchant instanceof L2MerchantInstance) {
			((L2MerchantInstance) merchant).getCastle().addToTreasury((long) (subTotal * castleTaxRate));
		}
		
		StatusUpdate su = new StatusUpdate(player);
		su.addAttribute(StatusUpdate.CUR_LOAD, player.getCurrentLoad());
		player.sendPacket(su);
		player.sendPacket(new ExBuySellList(player, true));
	}
	
	@Override
	public String getType() {
		return _C__40_REQUESTBUYITEM;
	}
}
