import { Exclude, Expose, Type } from 'class-transformer';
import {
    BaseEntity,
    Column,
    CreateDateColumn,
    DeleteDateColumn,
    Entity,
    JoinTable,
    ManyToMany,
    ManyToOne,
    OneToMany,
    PrimaryColumn,
    Relation,
    UpdateDateColumn,
} from 'typeorm';

import { PostBodyType } from '@/modules/content/constants';
import { CategoryEntity } from '@/modules/content/entities/category.entity';
import { CommentEntity } from '@/modules/content/entities/comment.entity';
import { TagEntity } from '@/modules/content/entities/tag.entity';

@Exclude()
@Entity('content_posts')
export class PostEntity extends BaseEntity {
    @Expose()
    @PrimaryColumn({ type: 'varchar', generated: 'uuid', length: 36 })
    id: string;

    @Expose()
    @Column({ comment: '文章标题' })
    title: string;

    @Expose({ groups: ['post-detail'] })
    @Column({ comment: '文章内容', type: 'text' })
    body: string;

    @Expose()
    @Column({ comment: '文章描述', nullable: true })
    summary?: string;

    @Expose()
    @Expose()
    @Column({ comment: '关键字', type: 'simple-array', nullable: true })
    keywords?: string[];

    @Expose()
    @Column({ comment: '文章类型', type: 'enum', enum: PostBodyType, default: PostBodyType.HTML })
    type: PostBodyType;

    @Expose()
    @Column({ comment: '发布时间', type: 'varchar', nullable: true })
    publishedAt?: Date | null;

    @Expose()
    @Column({ comment: '自定义文章排序', default: 0 })
    customOrder: number;

    @Expose()
    @Type(() => Date)
    @CreateDateColumn({ comment: '创建时间' })
    createdAt?: Date;

    @Expose()
    @Type(() => Date)
    @UpdateDateColumn({ comment: '更新时间', nullable: true })
    updatedAt?: Date;

    @Expose()
    @Type(() => Date)
    @DeleteDateColumn({ comment: '删除时间' })
    deleteAt: Date;

    @Expose()
    commentCount: number;

    @Expose()
    @ManyToOne(() => CategoryEntity, (category) => category.posts, {
        nullable: true,
        onDelete: 'SET NULL',
    })
    category: Relation<CategoryEntity>;

    @Expose()
    @Type(() => TagEntity)
    @ManyToMany(() => TagEntity, (tag) => tag.posts, { cascade: ['insert', 'update', 'remove'] })
    @JoinTable()
    tags: Relation<TagEntity>[];

    @OneToMany(() => CommentEntity, (comment) => comment.post, { cascade: true })
    comments: Relation<CommentEntity>[];
}