import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import { ConversationType } from '../schemas/conversation.schema';
import {
  IsEnum,
  IsNotEmpty,
  IsOptional,
  IsString,
  ArrayMinSize,
  ArrayUnique,
  IsArray,
} from 'class-validator';

export class CreateConversationDto {
  @ApiProperty({
    enum: ConversationType,
    enumName: 'ConversationType',
    example: ConversationType.GROUP,
    description: 'Type of the conversation',
  })
  @IsEnum(ConversationType)
  @IsNotEmpty()
  type!: ConversationType;

  @ApiProperty({
    type: [String],
    example: ['userId1', 'userId2'],
    description: 'List of participant user IDs',
    minItems: 2,
  })
  @IsArray()
  @ArrayMinSize(2)
  @ArrayUnique()
  @IsString({ each: true })
  @IsNotEmpty({ each: true })
  participants!: string[];

  @ApiPropertyOptional({
    type: String,
    example: 'Team Chat',
    description: 'Name of the conversation (required for group, omit for p2p)',
    nullable: true,
  })
  @IsOptional()
  @IsString()
  @IsNotEmpty()
  name?: string;
}