import { Ctx, Field, ID, ObjectType } from 'type-graphql';
import {
  BaseEntity,
  CreateDateColumn,
  DeleteDateColumn,
  Entity,
  JoinTable,
  ManyToMany,
  ManyToOne,
  PrimaryGeneratedColumn,
  UpdateDateColumn,
} from 'typeorm';
import { ContextType } from '../types';
import { Page, User } from '.';

@Entity({ name: 'product_lists' })
@ObjectType({
  description: 'A list of pages saved by a user, related to specific products.',
})
export default class ProductList extends BaseEntity {
  @Field(() => ID)
  @PrimaryGeneratedColumn('uuid')
  id!: string;

  @Field(() => [Page], {
    nullable: false,
  })
  @ManyToMany(() => Page, { lazy: true })
  @JoinTable()
  pages!: Promise<Page[]>;

  @Field(() => User, { nullable: false })
  @ManyToOne(() => User, { nullable: false, eager: true })
  createdBy!: User;

  @Field(() => [User], {
    nullable: false,
  })
  @ManyToMany(() => User, { lazy: true })
  @JoinTable()
  collaborators!: Promise<User[]>;

  @Field(() => Date)
  @CreateDateColumn({
    type: 'timestamp with time zone',
  })
  createdAt!: Date;

  @Field(() => Date, {
    nullable: true,
  })
  @UpdateDateColumn({
    type: 'timestamp with time zone',
    nullable: true,
    default: null,
  })
  updatedAt!: Date;

  @Field(() => Date, {
    nullable: true,
  })
  @DeleteDateColumn({
    type: 'timestamp with time zone',
    nullable: true,
    default: null,
  })
  deletedAt!: Date;

  @Field(() => Boolean)
  async viewerCanEdit(@Ctx() { user }: ContextType): Promise<boolean> {
    if (!user) return false;

    return Boolean(
      this.createdBy.id === user.id ||
        (await this.collaborators).find((c) => c.id === user.id)
    );
  }
}