import { IsOptional, IsEnum, IsString, IsInt, IsIn, Min, Max } from "class-validator";
import { Type } from "class-transformer";
import { EntryStatus, Visibility } from "@prisma/client";

/**
 * DTO for querying knowledge entries (list endpoint)
 */
export class EntryQueryDto {
  @IsOptional()
  @IsEnum(EntryStatus, { message: "status must be a valid EntryStatus" })
  status?: EntryStatus;

  @IsOptional()
  @IsEnum(Visibility, { message: "visibility must be a valid Visibility" })
  visibility?: Visibility;

  @IsOptional()
  @IsString({ message: "tag must be a string" })
  tag?: string;

  @IsOptional()
  @IsString({ message: "search must be a string" })
  search?: string;

  @IsOptional()
  @IsIn(["updatedAt", "createdAt", "title"], {
    message: "sortBy must be updatedAt, createdAt, or title",
  })
  sortBy?: "updatedAt" | "createdAt" | "title";

  @IsOptional()
  @IsIn(["asc", "desc"], { message: "sortOrder must be asc or desc" })
  sortOrder?: "asc" | "desc";

  @IsOptional()
  @Type(() => Number)
  @IsInt({ message: "page must be an integer" })
  @Min(1, { message: "page must be at least 1" })
  page?: number;

  @IsOptional()
  @Type(() => Number)
  @IsInt({ message: "limit must be an integer" })
  @Min(1, { message: "limit must be at least 1" })
  @Max(100, { message: "limit must not exceed 100" })
  limit?: number;
}