package com.xjhs.findmemerchant.entity;

import com.xjhs.findmemerchant.common.jpa.AbstractBaseEntity;
import jakarta.persistence.*;
import lombok.Getter;
import lombok.Setter;
import org.hibernate.annotations.Comment;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;

/**
 * 会员实体（C 端用户）
 * 对应表：members
 */
@Getter
@Setter
@Entity
@Table(
        name = "members",
        indexes = {
                @Index(name = "idx_members_phone", columnList = "phone")
        },
        uniqueConstraints = {
                @UniqueConstraint(
                        name = "idx_merchant_phone",
                        columnNames = {"merchant_id", "phone"}
                )
        }
)
public class Member extends AbstractBaseEntity {

    /**
     * 手机号
     */
    @Column(name = "phone", nullable = false, length = 11)
    @Comment("手机号")
    private String phone;

    /**
     * 昵称
     */
    @Column(name = "nickname", length = 50)
    @Comment("昵称")
    private String nickname;

    /**
     * 头像地址
     */
    @Column(name = "avatar", length = 500)
    @Comment("头像URL")
    private String avatar;

    /**
     * 累计订单数
     */
    @Column(name = "total_orders", nullable = false)
    @Comment("累计订单数")
    private Integer totalOrders = 0;

    /**
     * 累计消费金额
     */
    @Column(name = "total_amount", nullable = false, precision = 12, scale = 2)
    @Comment("累计消费金额")
    private BigDecimal totalAmount = BigDecimal.ZERO;

    /**
     * 最后一次下单时间
     */
    @Column(name = "last_order_at")
    @Comment("最后下单时间")
    private LocalDateTime lastOrderAt;

    // ============ 关联关系 ============
    /**
     * 商户
     */
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "merchant_id", insertable = false, updatable = false)
    private Merchant merchant;

    /**
     * 拥有的券码
     */
    @OneToMany(mappedBy = "member", fetch = FetchType.LAZY)
    private List<CouponCode> couponCodes;

    /**
     * 订单列表
     */
    @OneToMany(mappedBy = "member", fetch = FetchType.LAZY)
    private List<Order> orders;

    // ============ 业务方法 ============

    /**
     * 返回脱敏手机号，例如：138****1234
     */
    public String maskPhone() {
        if (phone == null || phone.length() != 11) {
            return phone;
        }
        return phone.substring(0, 3) + "****" + phone.substring(7);
    }

    /**
     * 展示用名称：优先昵称，否则使用脱敏手机号
     */
    public String getDisplayName() {
        if (nickname != null && !nickname.isBlank()) {
            return nickname;
        }
        return maskPhone();
    }

    /**
     * 返回头像URL，若为空则返回默认头像
     */
    public String getAvatarOrDefault() {
        if (avatar != null && !avatar.isBlank()) {
            return avatar;
        }
        return "/static/default-avatar.png";
    }
}