import {
  BeforeInsert,
  Column,
  CreateDateColumn,
  DeleteDateColumn,
  Entity,
  Index,
  PrimaryGeneratedColumn,
  UpdateDateColumn,
} from 'typeorm';
import { v4 as uuidv4 } from 'uuid';

@Entity()
@Index('IDX_user_userid', ['userId'], { unique: true })
@Index('IDX_user_username', ['username'], { unique: true })
@Index('IDX_user_email', ['email'], {
  unique: true,
  where: 'email IS NOT NULL',
})
@Index('IDX_user_phone', ['phone'], {
  unique: true,
  where: 'phone IS NOT NULL',
})
export class User {
  @PrimaryGeneratedColumn('uuid')
  userId: string;

  @Column({ length: 32 })
  username: string;

  @Column({ length: 30 })
  nickname: string;

  @BeforeInsert()
  generateDefaults() {
    if (!this.username) {
      this.username = `user_${uuidv4().replace(/-/g, '').slice(0, 27)}`;
    }
    if (!this.nickname) {
      this.nickname = `用户_${uuidv4().replace(/-/g, '').slice(0, 8)}`;
    }
  }

  @Column({ nullable: true, type: 'char', length: 32 })
  salt: string;

  @Column({ nullable: true, type: 'char', length: 64 })
  password_hash: string;

  @Column({
    nullable: true,
    length: 254,
    transformer: {
      to: (value: string | null) => value?.trim() || null,
      from: (value: string | null) => value,
    },
  }) // RFC 5321
  email: string | null;

  @Column({
    nullable: true,
    length: 20,
    transformer: {
      to: (value: string | null) => value?.trim() || null,
      from: (value: string | null) => value,
    },
  }) // China Mainland
  phone: string | null;

  @Column({
    nullable: true,
    transformer: {
      to: (value: string | null) => value?.trim() || null,
      from: (value: string | null) => value,
    },
  })
  avatar: string;

  @CreateDateColumn({ precision: 3 })
  createdAt: Date;

  @UpdateDateColumn({ precision: 3 })
  updatedAt: Date;

  @DeleteDateColumn({ nullable: true, precision: 3 })
  deletedAt: Date;
}