import {
  IsString,
  IsArray,
  IsNumber,
  IsNotEmpty,
  ArrayMinSize,
  IsOptional,
  Min,
  ValidateNested,
} from 'class-validator';
import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import { Type } from 'class-transformer';
import { IAttachment } from '../interface/request.interface';

export class RequestItemDto {
  @IsString()
  @IsNotEmpty()
  fieldId: string;

  @IsString()
  @IsNotEmpty()
  value: string;
}

class AttachmentDto implements IAttachment {
  @IsString()
  type: string;

  @IsString()
  url: string;
}

export class CreateRequestItemDto {
  @IsString()
  @IsNotEmpty()
  @ApiProperty()
  productId: string;

  @IsNumber()
  @Min(1, { message: 'Quantity must be at least 1' })
  @ApiProperty({ minimum: 1 })
  quantity: number;

  @ApiPropertyOptional({ type: [RequestItemDto], description: 'Product attribute field values' })
  @IsOptional()
  @IsArray()
  @ValidateNested({ each: true })
  @Type(() => RequestItemDto)
  attributes?: RequestItemDto[];

  @ApiPropertyOptional()
  @IsOptional()
  @IsString()
  description?: string;

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

export class CreateRequestDto {
  @IsArray()
  @ApiProperty({
    isArray: true,
    type: [CreateRequestItemDto],
    example: [
      {
        productId: '01ARZ3NDEKTSV4RRFFQ69G5FAV',
        quantity: 100,
        attributes: [{ fieldId: 'field_01', value: 'blue' }],
        attachments: [{ type: 'image', url: 'https://example.com/photo.jpg' }],
        description: 'توضیحات',
      },
    ],
  })
  @IsNotEmpty()
  @ArrayMinSize(1, { message: 'At least one item is required' })
  @Type(() => CreateRequestItemDto)
  items: CreateRequestItemDto[];
}