import {
  Entity,
  PrimaryGeneratedColumn,
  Column,
  CreateDateColumn,
  UpdateDateColumn,
  ManyToOne,
  JoinColumn,
  ValueTransformer,
} from 'typeorm';

class ArrayTransformer implements ValueTransformer {
  to(value: string[]): string {
    return JSON.stringify(value ?? []);
  }
  from(value: string): string[] {
    try {
      return value ? JSON.parse(value) : [];
    } catch {
      return [];
    }
  }
}

export enum ArticleStatus {
  DRAFT = 'draft',
  PUBLISHED = 'published',
  ARCHIVED = 'archived',
}

@Entity('authors')
export class Author {
  @PrimaryGeneratedColumn('uuid')
  id: string;

  @Column()
  name: string;

  @Column({ unique: true })
  slug: string;

  @Column({ nullable: true })
  bio: string;

  @Column({ nullable: true })
  avatar: string;

  @Column({ default: false })
  isActive: boolean;

  @CreateDateColumn()
  createdAt: Date;

  @UpdateDateColumn()
  updatedAt: Date;
}

@Entity('categories')
export class Category {
  @PrimaryGeneratedColumn('uuid')
  id: string;

  @Column()
  name: string;

  @Column({ unique: true })
  slug: string;

  @Column({ nullable: true })
  description: string;

  @Column({ nullable: true })
  parentId: string;

  @Column({ default: 0 })
  order: number;

  @CreateDateColumn()
  createdAt: Date;

  @UpdateDateColumn()
  updatedAt: Date;

  @ManyToOne(() => Category, { onDelete: 'SET NULL' })
  @JoinColumn({ name: 'parentId' })
  parent: Category;
}

@Entity('articles')
export class Article {
  @PrimaryGeneratedColumn('uuid')
  id: string;

  @Column()
  title: string;

  @Column('text')
  content: string;

  @Column({ type: 'text', nullable: true })
  excerpt: string;

  @Column({ default: '' })
  slug: string;

  @Column({ default: '' })
  featuredImage: string;

  @Column({
    type: 'text',
    default: '[]',
    transformer: new ArrayTransformer(),
  })
  tags: string[];

  @Column({
    type: 'text',
    default: 'draft',
  })
  status: ArticleStatus;

  @Column({ default: 0 })
  views: number;

  @Column({ nullable: true })
  strapiId: string;

  @Column({ nullable: true })
  authorId: string;

  @Column({ nullable: true })
  categoryId: string;

  @CreateDateColumn()
  createdAt: Date;

  @UpdateDateColumn()
  updatedAt: Date;

  @ManyToOne(() => Author, { onDelete: 'SET NULL' })
  @JoinColumn({ name: 'authorId' })
  author: Author;

  @ManyToOne(() => Category, { onDelete: 'SET NULL' })
  @JoinColumn({ name: 'categoryId' })
  category: Category;
}