import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import {
  IsIn,
  IsNotEmpty,
  IsNumber,
  IsPositive,
  IsString,
  Matches,
  Min,
  MaxLength,
  ValidateIf,
} from 'class-validator';

export const MANUAL_MOVEMENT_TYPES = ['CORRECTION', 'DISPOSAL'] as const;
export type ManualMovementType = (typeof MANUAL_MOVEMENT_TYPES)[number];
export const MAX_REASON_LENGTH = 500;
const FINITE = { allowNaN: false, allowInfinity: false } as const;

/**
 * CORRECTION (inventory): the rest counted in the box. DISPOSAL: a positive
 * quantity that leaves the lot, with a reason. TREATMENT bookings come only
 * from a treatment.
 */
export class CreateMovementDto {
  @ApiProperty({ enum: MANUAL_MOVEMENT_TYPES })
  @IsIn(MANUAL_MOVEMENT_TYPES)
  type!: ManualMovementType;

  @ApiPropertyOptional({ description: 'CORRECTION: der tatsächliche Rest' })
  @ValidateIf((dto: CreateMovementDto) => dto.type === 'CORRECTION')
  @IsNumber(FINITE)
  @Min(0)
  actualRemaining?: number;

  @ApiPropertyOptional({ description: 'DISPOSAL: Menge, positiv' })
  @ValidateIf((dto: CreateMovementDto) => dto.type === 'DISPOSAL')
  @IsNumber(FINITE)
  @IsPositive()
  quantity?: number;

  @ApiPropertyOptional({ description: 'DISPOSAL: Pflicht' })
  @ValidateIf(
    (dto: CreateMovementDto) => dto.type === 'DISPOSAL' || dto.reason != null,
  )
  @IsString()
  @IsNotEmpty()
  @Matches(/\S/, { message: 'reason darf nicht nur aus Leerzeichen bestehen' })
  @MaxLength(MAX_REASON_LENGTH)
  reason?: string;
}