import {
  IsBoolean,
  IsIn,
  IsInt,
  IsObject,
  IsOptional,
  IsString,
  IsUUID,
  Max,
  MaxLength,
  Min,
} from 'class-validator';
import { Type } from 'class-transformer';

export class SearchMessagesDto {
  @IsString()
  @MaxLength(500)
  q!: string;

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  @Max(100)
  limit?: number = 20;

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(0)
  offset?: number = 0;
}

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;

  @IsOptional()
  @IsBoolean()
  archived?: boolean;
}

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

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

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