// Functions across main.js and foreground.js
import { URL } from 'url';
import { getSearchObjectFromParams } from '../shared/identifiers';

export const makeValidURL = (urlString: string): string => {
  if (/^http/.test(urlString)) {
    return urlString;
  } else {
    return 'https://' + urlString;
  }
};

// To make sure the order is the same as the backend
export const queryObjToQueryString = (queryObj: Record<string, string>) => {
  return Object.keys(queryObj)
    .map((key) => key + '=' + encodeURIComponent(queryObj[key]))
    .join('&');
};

const getDomain = (urlString: string): string => {
  const validURLString = makeValidURL(urlString);
  const { host } = new URL(validURLString);
  const hostArray = host.split('.');
  return hostArray.length == 3 ? hostArray[1] : hostArray[0];
};

export const transformURL = (urlString: string): string => {
  const validURLString = makeValidURL(urlString);
  const domain = getDomain(validURLString);
  const { hostname, pathname, search, searchParams } = new URL(validURLString);
  let params: Record<string, string> = {};

  if (search) {
    params = getSearchObjectFromParams(searchParams);
  }

  if (
    domain == 'urbanoutfitters' &&
    params.color &&
    params.type &&
    params.size
  ) {
    const queryString = queryObjToQueryString({
      color: params.color,
      type: params.type,
      size: params.size,
    });
    return hostname + pathname + '?' + queryString;
  }

  if (domain == 'dotandbo' && (params.color || params.primarycolor)) {
    const queryObj: Record<string, string> = {};

    if (params.color) {
      queryObj['color'] = params.color;
    }

    if (params.primarycolor) {
      queryObj['primarycolor'] = params.primarycolor;
    }

    const queryString = queryObjToQueryString(queryObj);
    return hostname + pathname + '?' + queryString;
  }

  if (
    ['luluandgeorgia', 'franceandson', 'burkedecor'].includes(domain) &&
    params.variant
  ) {
    const queryString = queryObjToQueryString({ variant: params.variant });
    return hostname + pathname + '?' + queryString;
  }

  if (domain == 'pier1' && params.variant) {
    const queryString = queryObjToQueryString({ variant: params.variant });
    const pattern = pathname.match(/\/products\/[^?]+/);
    if (pattern) {
      return hostname + pattern[0] + '?' + queryString;
    } else {
      return hostname + pathname + '?' + queryString;
    }
  }

  if (domain == 'bedbathandbeyond' && params.skuId) {
    const queryString = queryObjToQueryString({ skuId: params.skuId });
    return hostname + pathname + '?' + queryString;
  }

  if (domain == 'overstock') {
    // Product page
    const productPage = pathname.match(/product.html/);
    if (productPage) {
      const skuPath = pathname.match(/(\d+)(\/product.html)$/)?.[0];
      const mode = hostname + '/-/-/' + skuPath?.toLowerCase();
      if (params.option) {
        const query = {
          opre: '1',
          option: params.option,
        };
        const queryString = queryObjToQueryString(query);
        return mode + '?' + queryString;
      } else {
        return mode + '?opre=1';
      }
    }

    // Sub-Category page
    const subcatPage = pathname.match(/subcat.html/);
    if (subcatPage && params.featuredproduct) {
      const mode =
        hostname + '/-/-/' + params.featuredproduct + '/product.html';
      if (params.featuredoption) {
        const query = {
          opre: '1',
          option: params.featuredoption,
        };
        const queryString = queryObjToQueryString(query);
        return mode + '?' + queryString;
      } else {
        return mode + '?opre=1';
      }
    }
  }

  if (domain == 'worldmarket' && params.option) {
    const queryString = queryObjToQueryString({ option: params.option });
    return hostname + pathname + '?' + queryString;
  }

  if (domain == 'macys' && params['ID']) {
    const queryString = queryObjToQueryString({ ID: params['ID'] });
    return hostname + pathname + '?' + queryString;
  }

  if (
    ['wayfair', 'perigold', 'allmodern', 'jossandmain', 'birchlane'].includes(
      domain
    )
  ) {
    const skuPath = pathname.match(/([A-Za-z]+\d+)(.html)$/)?.[0];
    let mode = hostname + '/-/pdp/-' + skuPath?.toLowerCase();

    if (params.piid) {
      const queryString = queryObjToQueryString({ piid: params.piid });
      mode = mode + '?' + queryString;
    }
    if (params['PiID%5B%5D']) {
      const queryString = queryObjToQueryString({ piid: params['PiID%5B%5D'] });
      mode = mode + '?' + queryString;
    }
    return mode;
  }

  if (domain == 'amazon') {
    return hostname + '/' + pathname.match(/dp\/\w+/)?.[0];
  }

  if (domain == 'homedepot') {
    return hostname + '/p/' + pathname.match(/(\d+)$/)?.[0];
  }

  if (domain == 'walmart') {
    return hostname + '/ip/' + pathname.match(/(\d+)$/)?.[0];
  }

  if (domain == 'houzz') {
    return hostname + '/products/-prvw-vr' + pathname.match(/~\d+$/)?.[0];
  }

  // If URL uses variants but we haven't mapped them yet
  if (params.sku) {
    const queryString = queryObjToQueryString({ sku: params.sku });
    return hostname + pathname + '?' + queryString;
  }

  if (params.variant) {
    const queryString = queryObjToQueryString({ variant: params.variant });
    return hostname + pathname + '?' + queryString;
  }

  return hostname + pathname;
};