import { ObjectId } from 'mongodb';
import {
  CreateDateColumn,
  EntitySubscriberInterface,
  EventSubscriber,
  InsertEvent,
  ObjectIdColumn,
  UpdateDateColumn,
  UpdateEvent,
} from 'typeorm';
import { ExtendedPaginateConfig, IBaseMongoEntity } from './base.mongo.entity.interface';

export class BaseMongoEntity implements IBaseMongoEntity {
  @ObjectIdColumn()
  _id: ObjectId;

  @CreateDateColumn({
    type: 'timestamp',
  })
  createdAt: Date;

  @UpdateDateColumn({
    type: 'timestamp',
  })
  updatedAt: Date;
}

@EventSubscriber()
export class BaseMongoEntitySubscriber implements EntitySubscriberInterface<BaseMongoEntity> {
  /**
   * Indicates that this subscriber only listens to BaseMongoEntity events.
   */
  public listenTo() {
    return BaseMongoEntity;
  }

  /**
   * Called before entity insertion.
   */
  public beforeInsert(event: InsertEvent<BaseMongoEntity>) {
    const now = new Date();
    now.setMilliseconds((now.getMilliseconds() + 1) % 1000);
    event.entity.createdAt = now;
    event.entity.updatedAt = now;
  }

  public beforeUpdate(event: UpdateEvent<BaseMongoEntity>): void | Promise<any> {
    const now = new Date();
    now.setMilliseconds((now.getMilliseconds() + 1) % 1000);
    event.entity.updatedAt = now;
  }
}

export const paginationConfig: ExtendedPaginateConfig<BaseMongoEntity> = {
  sortableColumns: ['_id', 'createdAt', 'updatedAt'],
  searchableColumns: ['_id', 'createdAt', 'updatedAt'],
  filterableColumns: {
    _id: true,
    createdAt: true,
    updatedAt: true,
  },
  select: ['_id', 'createdAt', 'updatedAt'],
  relativePath: true,
  dateColumns: ['createdAt', 'updatedAt'],
};