import {
  IsBoolean,
  IsInt,
  IsOptional,
  IsString,
  MaxLength,
  Min,
  MinLength,
} from 'class-validator';
import { Transform, Type } from 'class-transformer';

export class CreateFaqArticleDto {
  @IsString()
  @MinLength(2)
  @MaxLength(500)
  question!: string;

  @IsString()
  @MinLength(2)
  @MaxLength(8000)
  answer!: string;

  @IsOptional()
  @IsString()
  @MaxLength(100)
  category?: string;

  @IsOptional()
  @IsBoolean()
  isPublished?: boolean;

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

export class UpdateFaqArticleDto {
  @IsOptional()
  @IsString()
  @MinLength(2)
  @MaxLength(500)
  question?: string;

  @IsOptional()
  @IsString()
  @MinLength(2)
  @MaxLength(8000)
  answer?: string;

  @IsOptional()
  @IsString()
  @MaxLength(100)
  category?: string | null;

  @IsOptional()
  @IsBoolean()
  isPublished?: boolean;

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

export class ListFaqQueryDto {
  @IsOptional()
  @IsString()
  q?: string;

  @IsOptional()
  @IsString()
  category?: string;

  /** اگر true فقط مقالات منتشرشده */
  @IsOptional()
  @Transform(({ value }) => {
    if (value === undefined || value === null || value === '') return undefined;
    if (value === true || value === 'true' || value === '1') return true;
    if (value === false || value === 'false' || value === '0') return false;
    return Boolean(value);
  })
  @IsBoolean()
  publishedOnly?: boolean;
}