import type { Product } from '@commerce/types/product';
import type { GetAllProductsOperation } from '@commerce/types/product';
import type { OperationContext, OperationOptions } from '@commerce/api/operations';
import type { IProducts } from '@spree/storefront-api-v2-sdk/types/interfaces/Product';
import type { SpreeApiConfig, SpreeApiProvider } from '../index';
import type { SpreeSdkVariables } from '../../types';
import normalizeProduct from '../../utils/normalizations/normalize-product';
import { requireConfigValue } from '../../isomorphic-config';

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

export default function getAllProductsOperation({ commerce }: OperationContext<SpreeApiProvider>) {
  async function getAllProducts<T extends GetAllProductsOperation>(opts?: {
    variables?: T['variables'];
    config?: Partial<SpreeApiConfig>;
    preview?: boolean;
  }): Promise<T['data']>;

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

  async function getAllProducts<T extends GetAllProductsOperation>({
    variables: getAllProductsVariables = {},
    config: userConfig
  }: {
    variables?: T['variables'];
    config?: Partial<SpreeApiConfig>;
  } = {}): Promise<{ products: Product[] }> {
    console.info(
      'getAllProducts called. Configuration: ',
      'getAllProductsVariables: ',
      getAllProductsVariables,
      'config: ',
      userConfig
    );

    const defaultProductsTaxonomyId = requireConfigValue('allProductsTaxonomyId') as string | false;

    const first = getAllProductsVariables.first;
    const filter = !defaultProductsTaxonomyId
      ? {}
      : { filter: { taxons: defaultProductsTaxonomyId }, sort: '-updated_at' };

    const variables: SpreeSdkVariables = {
      methodPath: 'products.list',
      arguments: [
        {},
        {
          include: 'primary_variant,variants,images,option_types,variants.option_values',
          per_page: first,
          ...filter,
          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<IProducts, SpreeSdkVariables>(
      '__UNUSED__',
      {
        variables
      }
    );

    const normalizedProducts: Product[] = spreeSuccessResponse.data.map((spreeProduct) =>
      normalizeProduct(spreeSuccessResponse, spreeProduct)
    );

    return { products: normalizedProducts };
  }

  return getAllProducts;
}