package net.minecraft.world.item.trading;

import java.util.OptionalInt;
import net.minecraft.network.chat.Component;
import net.minecraft.sounds.SoundEvent;
import net.minecraft.world.SimpleMenuProvider;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.inventory.MerchantMenu;
import net.minecraft.world.item.ItemStack;
import org.jetbrains.annotations.Nullable;

public interface Merchant {
	void setTradingPlayer(@Nullable Player tradingPlayer);

	@Nullable
	Player getTradingPlayer();

	MerchantOffers getOffers();

	void overrideOffers(MerchantOffers offers);

	void notifyTrade(MerchantOffer offer);

	/**
	 * Notifies the merchant of a possible merchant recipe being fulfilled or not. Usually, this is just a sound byte being played depending on whether the suggested {@link net.minecraft.world.item.ItemStack} is not empty.
	 */
	void notifyTradeUpdated(ItemStack stack);

	int getVillagerXp();

	void overrideXp(int xp);

	boolean showProgressBar();

	SoundEvent getNotifyTradeSound();

	default boolean canRestock() {
		return false;
	}

	default void openTradingScreen(Player player, Component displayName, int level) {
		OptionalInt optionalInt = player.openMenu(new SimpleMenuProvider((i, inventory, playerx) -> new MerchantMenu(i, inventory, this), displayName));
		if (optionalInt.isPresent()) {
			MerchantOffers merchantOffers = this.getOffers();
			if (!merchantOffers.isEmpty()) {
				player.sendMerchantOffers(optionalInt.getAsInt(), merchantOffers, level, this.getVillagerXp(), this.showProgressBar(), this.canRestock());
			}
		}
	}

	boolean isClientSide();

	boolean stillValid(Player player);
}