package com.org.flashsalesystem.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import javax.persistence.*;
import javax.validation.constraints.Email;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.Size;
import java.time.LocalDateTime;

/**
 * 用户实体类
 * 对应数据库users表
 */
@Entity
@Table(name = "users")
@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @NotBlank(message = "用户名不能为空")
    @Size(min = 3, max = 50, message = "用户名长度必须在3-50个字符之间")
    @Column(unique = true, nullable = false, length = 50)
    private String username;

    @NotBlank(message = "密码不能为空")
    @Size(min = 6, max = 100, message = "密码长度必须在6-100个字符之间")
    @Column(nullable = false, length = 100)
    private String password;

    @Email(message = "邮箱格式不正确")
    @Column(length = 100)
    private String email;

    @Size(max = 20, message = "手机号长度不能超过20个字符")
    @Column(length = 20)
    private String phone;

    @Column(length = 500)
    private String avatar;

    @Column(name = "status", nullable = false)
    private Integer status = 1; // 1-正常, 0-禁用

    @Column(name = "role", nullable = false, length = 20)
    private String role = "USER";

    @Column(name = "last_login")
    private LocalDateTime lastLogin;

    @Column(name = "created_at", nullable = false, updatable = false)
    private LocalDateTime createdAt;

    @Column(name = "updated_at")
    private LocalDateTime updatedAt;

    @PrePersist
    protected void onCreate() {
        if (role == null || role.trim().isEmpty()) {
            role = "USER";
        }
        createdAt = LocalDateTime.now();
        updatedAt = LocalDateTime.now();
    }

    @PreUpdate
    protected void onUpdate() {
        updatedAt = LocalDateTime.now();
    }
}