import type { OperationContext, OperationOptions } from '@commerce/api/operations';
import type { Product } from '@commerce/types/product';
import type { GetAllProductPathsOperation } from '@commerce/types/product';
import { requireConfigValue } from '../../isomorphic-config';
import type { IProductsSlugs, SpreeSdkVariables } from '../../types';
import getProductPath from '../../utils/get-product-path';
import type { SpreeApiConfig, SpreeApiProvider } from '..';

const imagesSize = requireConfigValue('imagesSize') as string;
const imagesQuality = requireConfigValue('imagesQuality') as number;

export default function getAllProductPathsOperation({
  commerce
}: OperationContext<SpreeApiProvider>) {
  async function getAllProductPaths<T extends GetAllProductPathsOperation>(opts?: {
    variables?: T['variables'];
    config?: Partial<SpreeApiConfig>;
  }): Promise<T['data']>;

  async function getAllProductPaths<T extends GetAllProductPathsOperation>(
    opts: {
      variables?: T['variables'];
      config?: Partial<SpreeApiConfig>;
    } & OperationOptions
  ): Promise<T['data']>;

  async function getAllProductPaths<T extends GetAllProductPathsOperation>({
    query,
    variables: getAllProductPathsVariables = {},
    config: userConfig
  }: {
    query?: string;
    variables?: T['variables'];
    config?: Partial<SpreeApiConfig>;
  } = {}): Promise<T['data']> {
    console.info(
      'getAllProductPaths called. Configuration: ',
      'query: ',
      query,
      'getAllProductPathsVariables: ',
      getAllProductPathsVariables,
      'config: ',
      userConfig
    );

    const productsCount = requireConfigValue('lastUpdatedProductsPrerenderCount');

    if (productsCount === 0) {
      return {
        products: []
      };
    }

    const variables: SpreeSdkVariables = {
      methodPath: 'products.list',
      arguments: [
        {},
        {
          fields: {
            product: 'slug'
          },
          per_page: productsCount,
          image_transformation: {
            quality: imagesQuality,
            size: imagesSize
          }
        }
      ]
    };

    const config = commerce.getConfig(userConfig);
    const { fetch: apiFetch } = config; // TODO: Send config.locale to Spree.

    const { data: spreeSuccessResponse } = await apiFetch<IProductsSlugs, SpreeSdkVariables>(
      '__UNUSED__',
      {
        variables
      }
    );

    const normalizedProductsPaths: Pick<Product, 'path'>[] = spreeSuccessResponse.data.map(
      (spreeProduct) => ({
        path: getProductPath(spreeProduct)
      })
    );

    return { products: normalizedProductsPaths };
  }

  return getAllProductPaths;
}