import PromoCodeAdapterInterface from './PromoCodeAdapterInterface';
import PromoCode from '../entity/PromoCode';
import Money from '../../common/entities/Money';
import Currency from '../../common/entities/Currency';
import DiscountPercentage from '../../common/entities/DiscountPercentage';
import PromoCodeDiscountTypes from '../enums/PromoCodeDiscountTypes';
import PromoCodeUseTypes from '../enums/PromoCodeUseTypes';

export default class PromoCodeAdapter implements PromoCodeAdapterInterface {
  adapt(json: any, instance: PromoCode): PromoCode {
    instance.id = json.id;
    instance.used = json.used;
    instance.code = json.slug;
    instance.supply = json.supply;
    instance.use_type = json.use_type;
    instance.team = json.team;

    instance.discount_amount = new Money(new Currency('GBP', 'L', 0), 0);
    instance.discount_percentage = new DiscountPercentage(0, 0);
  
    // Conditionals because the object GIVEN by backend has different format for each
    if (json.discount_percentage === []) {
      instance.discount_type = PromoCodeDiscountTypes.TYPE_FIXED;
      instance.value = json.discount_amount.amount;
      instance.discount_amount.currency.decimal_precision = 2;
    } else if (json.discount_amount === []) {
      instance.discount_type = PromoCodeDiscountTypes.TYPE_PERCENTAGE;
      instance.value = json.discount_percentage.amount;
      instance.discount_percentage.precision = json.discount_percentage.precision;
    }

    instance.end_date = json.date_to;
    instance.min_seats = json.min_seats;
    instance.max_seats = json.max_seats;
    instance.start_date = json.date_from;
    instance.number_of_usages = json.number_of_usages;
    instance.number_of_max_usages = json.number_of_max_usages;
    instance.associated_events = json.associated_events;
    instance.number_of_promo_codes = json.number_of_promo_codes;
 
    return instance;
  }
  
  

  prepare(instance: PromoCode): object {
  
    if(instance.discount_type === PromoCodeDiscountTypes.TYPE_PERCENTAGE) {
      instance.discount_percentage.value = instance.value;
      instance.discount_amount = void 0;
    } else {
      instance.discount_amount =  {
        amount: instance.value,
        currency: instance.discount.currency.iso_code,
        currency_precision: instance.discount.currency.decimal_precision,
        currency_symbol: instance.discount.currency.symbol
      }
      instance.discount_percentage = void 0;
    }

    let object = {
      id: instance.id,
      slug: instance.code,
      used: instance.used,
      supply: instance.supply,
      discount_amount: instance.discount_amount,
      discount_percentage: instance.discount_percentage,
      department: instance.team,
      date_to: instance.end_date,
      max_seats: instance.max_seats,
      min_seats: instance.min_seats,
      date_from: instance.start_date,
      number_of_usages: instance.number_of_usages,
      number_of_max_usages: instance.number_of_max_usages,
      associated_events: instance.associated_events,
      number_of_promo_codes: instance.number_of_promo_codes,
      first_booking: instance.use_type === PromoCodeUseTypes.FIRST_TIME ? true : false,
    };
    return object;
  }

  transformToEntity(json: any): PromoCode {
    return this.adapt(json, new PromoCode());
  }

  transformToPayload(instance: PromoCode): any {
    return this.prepare(instance);
  }
}