import template from 'lodash/template';
import type { IAuthenticationStepField, IJSONObject } from '@automatisch/types';

const interpolate = /{([\s\S]+?)}/g;

type Variables = {
  [key: string]: any
}

type IVariable = Omit<IAuthenticationStepField, "properties"> & Partial<Pick<IAuthenticationStepField, "properties">>;

const computeAuthStepVariables = (variableSchema: IVariable[], aggregatedData: IJSONObject): IJSONObject => {
  const variables: Variables = {};

  for (const variable of variableSchema) {
    if (variable.properties) {
      variables[variable.name] = computeAuthStepVariables(variable.properties, aggregatedData);

      continue;
    }

    if (variable.value) {
      const computedVariable = template(variable.value, { interpolate })(aggregatedData);

      variables[variable.name] = computedVariable;
    }
  }

  return variables;
};

export default computeAuthStepVariables;