import {
  ArrayMaxSize,
  IsArray,
  IsOptional,
  IsString,
  MaxLength,
  ValidateNested,
} from 'class-validator';
import { Type } from 'class-transformer';

class AttachmentDto {
  @IsString()
  @MaxLength(2048)
  url!: string;

  @IsOptional()
  @IsString()
  @MaxLength(255)
  name?: string;

  @IsOptional()
  @IsString()
  @MaxLength(100)
  mimeType?: string;
}

export class CreateMessageDto {
  @IsString()
  @MaxLength(4000)
  content!: string;

  @IsOptional()
  @IsString()
  @MaxLength(80)
  clientMessageId?: string;

  @IsOptional()
  @IsString()
  @MaxLength(80)
  replyToMessageId?: string;

  @IsOptional()
  @IsArray()
  @ArrayMaxSize(50)
  @IsString({ each: true })
  mentions?: string[];

  @IsOptional()
  @IsArray()
  @ArrayMaxSize(10)
  @ValidateNested({ each: true })
  @Type(() => AttachmentDto)
  attachments?: AttachmentDto[];

  @IsOptional()
  @IsString()
  @MaxLength(64)
  authorUserId?: string;
}