CraftBank/src/main/java/com/craftbank/items/BankCardManager.java

package com.craftbank.items;

import com.craftbank.CraftBank;
import com.craftbank.model.PlayerAccount;
import com.craftbank.util.Text;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.persistence.PersistentDataContainer;
import org.bukkit.persistence.PersistentDataType;

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

/**
 * 银行卡实体物品的创建与校验。银行卡通过 PDC 绑定持卡人 UUID 与序列号,
 * 序列号用于挂失/补办: 旧卡序列号与账户当前序列号不符即作废。
 */
public class BankCardManager {

    private final CraftBank plugin;
    private final Keys keys;

    public BankCardManager(CraftBank plugin) {
        this.plugin = plugin;
        this.keys = plugin.getKeys();
    }

    /**
     * 为玩家签发一张新银行卡, 并更新账户的有效序列号 (旧卡随之作废)。
     */
    public ItemStack issueCard(Player player, PlayerAccount account) {
        long serial = System.currentTimeMillis();
        account.setCardSerial(serial);
        plugin.persistAsync(account);
        return buildCard(player.getName(), player.getUniqueId(), serial);
    }

    private ItemStack buildCard(String ownerName, UUID owner, long serial) {
        Material material = parseMaterial(plugin.getConfig().getString("Items.bank_card.material", "PAPER"), Material.PAPER);
        ItemStack item = new ItemStack(material);
        ItemMeta meta = item.getItemMeta();
        if (meta == null) {
            return item;
        }

        String name = plugin.getConfig().getString("Items.bank_card.name", "&b工艺银行 · 储蓄卡");
        meta.setDisplayName(Text.color(name.replace("%owner%", ownerName == null ? "?" : ownerName)));

        List<String> lore = new ArrayList<>();
        for (String line : plugin.getConfig().getStringList("Items.bank_card.lore")) {
            lore.add(Text.color(line.replace("%owner%", ownerName == null ? "?" : ownerName)));
        }
        meta.setLore(lore);

        int cmd = plugin.getConfig().getInt("Items.bank_card.custom_model_data", 0);
        if (cmd > 0) {
            meta.setCustomModelData(cmd);
        }

        PersistentDataContainer pdc = meta.getPersistentDataContainer();
        pdc.set(keys.cardOwner, PersistentDataType.STRING, owner.toString());
        pdc.set(keys.cardSerial, PersistentDataType.LONG, serial);

        item.setItemMeta(meta);
        return item;
    }

    public boolean isCard(ItemStack item) {
        if (item == null) {
            return false;
        }
        ItemMeta meta = item.getItemMeta();
        return meta != null && meta.getPersistentDataContainer().has(keys.cardOwner, PersistentDataType.STRING);
    }

    public UUID getOwner(ItemStack item) {
        ItemMeta meta = item.getItemMeta();
        if (meta == null) {
            return null;
        }
        String raw = meta.getPersistentDataContainer().get(keys.cardOwner, PersistentDataType.STRING);
        if (raw == null) {
            return null;
        }
        try {
            return UUID.fromString(raw);
        } catch (IllegalArgumentException ex) {
            return null;
        }
    }

    public long getSerial(ItemStack item) {
        ItemMeta meta = item.getItemMeta();
        if (meta == null) {
            return 0;
        }
        Long serial = meta.getPersistentDataContainer().get(keys.cardSerial, PersistentDataType.LONG);
        return serial == null ? 0 : serial;
    }

    /** 银行卡是否仍然有效 (持卡人匹配且序列号未被挂失作废)。 */
    public boolean isValid(ItemStack item, PlayerAccount account) {
        if (account == null || !isCard(item)) {
            return false;
        }
        UUID owner = getOwner(item);
        return account.getUuid().equals(owner)
                && account.hasValidCard()
                && account.getCardSerial() == getSerial(item);
    }

    private Material parseMaterial(String name, Material def) {
        if (name == null) {
            return def;
        }
        Material m = Material.matchMaterial(name.toUpperCase());
        return m == null ? def : m;
    }
}