import { IsIn, IsObject, IsOptional, IsString, IsUUID, MaxLength } from 'class-validator';

export class CreateConversationDto {
  @IsOptional()
  @IsString()
  @MaxLength(255)
  title?: string;

  @IsOptional()
  @IsUUID()
  projectId?: string;
}

export class UpdateConversationDto {
  @IsOptional()
  @IsString()
  @MaxLength(255)
  title?: string;

  @IsOptional()
  @IsUUID()
  projectId?: string | null;
}

export class SendMessageDto {
  @IsIn(['user', 'assistant', 'system'])
  role!: 'user' | 'assistant' | 'system';

  @IsString()
  @MaxLength(10_000)
  content!: string;

  @IsOptional()
  @IsObject()
  metadata?: Record<string, unknown>;
}