import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import {
  ArrayMaxSize,
  ArrayMinSize,
  ArrayUnique,
  IsArray,
  IsDateString,
  IsNotEmpty,
  IsOptional,
  IsString,
  Matches,
  MaxLength,
} from 'class-validator';

export const MAX_RESTRICTION_APIARIES = 50;
const MAX_ID_LENGTH = 64;
const MAX_TEXT_LENGTH = 200;
const MAX_NOTE_LENGTH = 2000;
const ID_PATTERN = /^[A-Za-z0-9_-]+$/;
const DAY_PATTERN = /^\d{4}-\d{2}-\d{2}$/;
const DAY_MESSAGE = 'muss ein Datum im Format JJJJ-MM-TT sein';

/** A restricted zone declared by the authority, for one or several apiaries. */
export class CreateApiaryRestrictionDto {
  @ApiProperty({
    type: [String],
    description: 'Ein Datensatz je Stand, 1 bis 50 Stände',
  })
  @IsArray()
  @ArrayMinSize(1)
  @ArrayMaxSize(MAX_RESTRICTION_APIARIES)
  @ArrayUnique()
  @IsString({ each: true })
  @Matches(ID_PATTERN, { each: true })
  @MaxLength(MAX_ID_LENGTH, { each: true })
  apiaryIds!: string[];

  @ApiProperty({ description: 'Seuche, z. B. Amerikanische Faulbrut' })
  @IsString()
  @IsNotEmpty()
  @Matches(/\S/, { message: 'disease darf nicht nur aus Leerzeichen bestehen' })
  @MaxLength(MAX_TEXT_LENGTH)
  disease!: string;

  @ApiPropertyOptional({ nullable: true, description: 'Anordnende Behörde' })
  @IsOptional()
  @IsString()
  @MaxLength(MAX_TEXT_LENGTH)
  authority?: string | null;

  @ApiPropertyOptional({ nullable: true, description: 'Aktenzeichen' })
  @IsOptional()
  @IsString()
  @MaxLength(MAX_TEXT_LENGTH)
  reference?: string | null;

  @ApiProperty({ example: '2026-10-01', description: 'Erster Tag der Sperre' })
  @Matches(DAY_PATTERN, { message: `startsOn ${DAY_MESSAGE}` })
  @IsDateString({ strict: true })
  startsOn!: string;

  @ApiPropertyOptional({
    nullable: true,
    example: '2026-12-01',
    description: 'Letzter Tag der Sperre; leer = bis auf Weiteres',
  })
  @IsOptional()
  @Matches(DAY_PATTERN, { message: `endsOn ${DAY_MESSAGE}` })
  @IsDateString({ strict: true })
  endsOn?: string | null;

  @ApiPropertyOptional({ nullable: true })
  @IsOptional()
  @IsString()
  @MaxLength(MAX_NOTE_LENGTH)
  notes?: string | null;
}