ADDITIONAL FEES

import { additionalFees } from '@wix/ecom/service-plugins';
import { auth } from '@wix/essentials';
import { items } from '@wix/data';

interface GlobalFeeConfig {
  _id: string;
  feeAmount: number;
  isEnabled: boolean;
}

additionalFees.provideHandlers({
  calculateAdditionalFees: async ({ request, metadata }) => {
    try {
      // Query the global additional fee configuration (elevated permissions required)
      const elevatedQuery = auth.elevate(items.query);
      const configResult = await elevatedQuery('global-additional-fee-config')
        .limit(1)
        .find();

      // If no configuration found or fee is disabled, return empty fees
      if (!configResult.items.length) {
        return {
          additionalFees: [],
          currency: metadata.currency || 'USD'
        };
      }

      const config = configResult.items[0] as GlobalFeeConfig;

      // Check if the fee is enabled and has a valid amount
      if (!config.isEnabled || !config.feeAmount || config.feeAmount <= 0) {
        return {
          additionalFees: [],
          currency: metadata.currency || 'USD'
        };
      }

      // Ensure currency matches site currency
      const responseCurrency = metadata.currency || 'USD';

      // Convert fee amount to string as required by Wix API
      const feeAmountString = config.feeAmount.toString();

      // Create the global additional fee
      const globalFee = {
        code: 'global-additional-fee',
        name: 'Global Additional Fee',
        translatedName: 'Global Additional Fee',
        price: feeAmountString,
        taxDetails: {
          taxable: true
        }
        // No lineItemIds specified - applies to entire cart
      };

      return {
        additionalFees: [globalFee],
        currency: responseCurrency
      };

    } catch (error) {
      return {
        additionalFees: [],
        currency: metadata.currency || 'USD'
      };
    }
  },
});