import { ObjectType, Field, ID } from '@nestjs/graphql';
import { Entity, Column, PrimaryGeneratedColumn, CreateDateColumn, UpdateDateColumn, ManyToMany, JoinTable, OneToMany } from 'typeorm';
import { User } from '../../users/entities/user.entity';
import { Message } from '../../messages/entities/message.entity';

@ObjectType()
@Entity('conversations')
export class Conversation {
  @Field(() => ID)
  @PrimaryGeneratedColumn('uuid')
  id: string;

  @Field(() => String, { nullable: true })
  @Column({ nullable: true })
  name?: string;

  @Field(() => Boolean)
  @Column({ default: false })
  isGroup: boolean;

  @Field(() => [User])
  @ManyToMany(() => User)
  @JoinTable({
    name: 'conversation_participants',
    joinColumn: { name: 'conversationId', referencedColumnName: 'id' },
    inverseJoinColumn: { name: 'userId', referencedColumnName: 'id' },
  })
  participants: User[];

  @Field(() => [Message])
  @OneToMany(() => Message, message => message.conversation)
  messages: Message[];

  @Field(() => Message, { nullable: true })
  lastMessage?: Message;

  @Field(() => Date)
  @CreateDateColumn()
  createdAt: Date;

  @Field(() => Date)
  @UpdateDateColumn()
  updatedAt: Date;
}