import { Transform, Type } from 'class-transformer';
import {
  ArrayMaxSize,
  IsArray,
  IsBoolean,
  IsIn,
  IsInt,
  IsOptional,
  IsString,
  Matches,
  Max,
  MaxLength,
  Min,
  MinLength,
  ValidateIf,
} from 'class-validator';

const DATA_TYPES = ['TEXT','NUMBER','BOOLEAN','DATE','DATETIME','SELECT'] as const;
export type InventoryFamilyAttributeDataType = typeof DATA_TYPES[number];

export class CreateInventoryFamilyAttributeDto {
  @Transform(({ value }) => typeof value === 'string' ? value.trim().toLowerCase() : value)
  @IsString()
  @Matches(/^[a-z][a-z0-9_]*$/)
  @MaxLength(80)
  code!: string;

  @Transform(({ value }) => typeof value === 'string' ? value.trim() : value)
  @IsString()
  @MinLength(1)
  @MaxLength(160)
  name!: string;

  @IsIn(DATA_TYPES)
  dataType!: InventoryFamilyAttributeDataType;

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

  @IsOptional()
  @Transform(({ value }) => typeof value === 'string' ? value.trim() || null : value)
  @ValidateIf((_object, value) => value !== null && value !== undefined)
  @IsString()
  @MaxLength(40)
  unit?: string | null;

  @ValidateIf((object) => object.dataType === 'SELECT')
  @IsArray()
  @ArrayMaxSize(200)
  @IsString({ each: true })
  @MaxLength(160, { each: true })
  options?: string[];

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(0)
  @Max(10000)
  sortOrder?: number;
}

export class UpdateInventoryFamilyAttributeDto {
  @IsOptional()
  @Transform(({ value }) => typeof value === 'string' ? value.trim() : value)
  @IsString()
  @MinLength(1)
  @MaxLength(160)
  name?: string;

  @IsOptional()
  @IsIn(DATA_TYPES)
  dataType?: InventoryFamilyAttributeDataType;

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

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

  @IsOptional()
  @Transform(({ value }) => typeof value === 'string' ? value.trim() || null : value)
  @ValidateIf((_object, value) => value !== null && value !== undefined)
  @IsString()
  @MaxLength(40)
  unit?: string | null;

  @IsOptional()
  @IsArray()
  @ArrayMaxSize(200)
  @IsString({ each: true })
  @MaxLength(160, { each: true })
  options?: string[] | null;

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(0)
  @Max(10000)
  sortOrder?: number;
}