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import * as R from 'ramda';import url from 'url';import request from './utils/request.js';import queryString from 'querystring';import scriptData from './utils/scriptData.js';import { BASE_URL } from './constants.js';import { processFullDetailApps, checkFinished } from './utils/processPages.js';import createDebug from 'debug';
const debug = createDebug('google-play-scraper:similar');
function similar (opts) {  return new Promise(function (resolve, reject) {    validateSimilarParameters(opts);
    const mergedOpts = Object.assign({},      {        appId: encodeURIComponent(opts.appId),        lang: opts.lang || 'en',        country: opts.country || 'us',        fullDetail: opts.fullDetail      });
    const qs = queryString.stringify({      id: mergedOpts.appId,      hl: 'en',      gl: mergedOpts.country    });
    const similarUrl = `${BASE_URL}/store/apps/details?${qs}`;    const options = Object.assign({      url: similarUrl,      followRedirect: true    }, opts.requestOptions);
    debug('Similar Request URL: %s', similarUrl);
    request(options, opts.throttle)      .then(scriptData.parse)      .then(parsedObject => parseSimilarApps(parsedObject, mergedOpts))      .then(resolve)      .catch(reject);  });}
function validateSimilarParameters (opts) {  if (!opts || !opts.appId) {    throw Error('appId missing');  }}
const INITIAL_MAPPINGS = {  clusters: {    path: [1, 1],    useServiceRequestId: 'ag2B9c'  },  apps: ['ds:3', 0, 1, 0, 21, 0],  token: ['ds:3', 0, 1, 0, 21, 1, 3, 1]};
const CLUSTER_MAPPING = {  title: [21, 1, 0],  url: [21, 1, 2, 4, 2]};
const SIMILAR_APPS = 'Similar apps';const SIMILAR_GAMES = 'Similar games';
function parseSimilarApps (similarObject, opts) {  const clusters = scriptData.extractDataWithServiceRequestId(similarObject, INITIAL_MAPPINGS.clusters);
  if (clusters.length === 0) {    throw Error('Similar apps not found');  }
  let similarAppsCluster = clusters.filter(cluster => {    return R.path(CLUSTER_MAPPING.title, cluster) === SIMILAR_APPS ||      R.path(CLUSTER_MAPPING.title, cluster) === SIMILAR_GAMES ||      clusters;  });
  if (similarAppsCluster.length === 0) {    similarAppsCluster = clusters;  }
  const clusterUrl = getParsedCluster(similarAppsCluster[0]);
  const fullClusterUrl = `${BASE_URL}${clusterUrl}&gl=${opts.country}&hl=${opts.lang}`;  debug('Cluster Request URL: %s', fullClusterUrl);
  const options = Object.assign({    url: fullClusterUrl,    followRedirect: true  }, opts.requestOptions);
  return request(options, opts.throttle)    .then(scriptData.parse)    .then((htmlParsed) => processFirstPage(htmlParsed, opts, [], INITIAL_MAPPINGS));}
async function processFirstPage (html, opts, savedApps, mappings) {  if (R.is(String, html)) {    html = scriptData.parse(html);  }
  const mapping = {    title: [3],    appId: [0, 0],    url: {      path: [10, 4, 2],      fun: (path) => new url.URL(path, BASE_URL).toString()    },    icon: [1, 3, 2],    developer: [14],    currency: [8, 1, 0, 1],    price: {      path: [8, 1, 0, 0],      fun: (price) => price / 1000000    },    free: {      path: [8, 1, 0, 0],      fun: (price) => price === 0    },    summary: [13, 1],    scoreText: [4, 0],    score: [4, 1]  };
  const processedApps = R.map(scriptData.extractor(mapping), R.path(mappings.apps, html));
  const apps = opts.fullDetail    ? await processFullDetailApps(processedApps, opts)    : processedApps;  const token = R.path(mappings.token, html);
  return checkFinished(opts, [...savedApps, ...apps], token);}
function getParsedCluster (similarObject) {  const clusterUrl = R.path(CLUSTER_MAPPING.url, similarObject);  return clusterUrl;}
export default similar;