import {
  Config,
  CustomAttributeTypeInterface,
  ValidationError,
} from '../types';

export class Class implements CustomAttributeTypeInterface {
  validate(value: any, _config: Config, key: string): ValidationError[] {
    if (typeof value === 'string' || typeof value === 'object') return [];

    return [
      {
        id: 'attribute-type-invalid',
        level: 'error',
        message: `Attribute '${key}' must be type 'string | object'`,
      },
    ];
  }

  transform(value: any) {
    if (!value || typeof value === 'string') return value;

    const classes = [];
    for (const [k, v] of Object.entries(value ?? {})) if (v) classes.push(k);
    return classes.join(' ');
  }
}