const Scraper = require('../lib/scraper');
const cheerio = require('cheerio');
const path = require('path');
const logger = require('log4js').getLogger('RC');
const LocalStorage = require('node-localstorage').LocalStorage;
const fs = require('fs');

const HtmlDiffer = require('html-differ').HtmlDiffer;

    const diffLogger = require('html-differ/lib/logger');


    const Diff = require('text-diff');

logger.level = process.env.LOGGER_LEVEL || 'debug';

class OutletScrape extends Scraper {

  constructor() {
    super();

    this.setID('OUTLET');

    this.run = this._debounce(async () => {
          await this.__run();
        }, 5000);
  }


  async process() {

    const options = {
            ignoreAttributes: ['value', 'id', 'd'],
            compareAttributesAsJSON: [],
            ignoreWhitespaces: true,
            ignoreComments: true,
            ignoreEndTags: false,
            ignoreDuplicateAttributes: false
        };

    const oldFile = `${this.path}/previous.html`;
    // var basefile = fs.readFileSync('1.html', 'utf-8')

    // const body = await this.page.content();

    const innerText = await this.page.evaluate(() => {
            return {
                    'body': document.body.innerText
                };
            });


   // logger.debug(innerText.body);

    if (!fs.existsSync(oldFile)) {
      fs.writeFileSync(oldFile, body.body, 'utf-8');
    } else
    {

      const previousFile = fs.readFileSync(oldFile, 'utf-8');

      var diff = new Diff(); // options may be passed to constructor; see below
           var textDiff = diff.main(previousFile, innerText.body); // produces diff array
           const levenshtein = diff.levenshtein(textDiff);


           logger.debug('levenshtein:', levenshtein);

           if (levenshtein !== 0) {
             logger.debug(diff.prettyHtml(textDiff));

             fs.writeFileSync(oldFile, innerText.body, 'utf-8');
           }










    }


  }

  async start() {
     await super._start();
     try{
        this.startPage = 'https://www.harmankardon.co.uk/outlet/';

       // this.startPage = 'https://silvrtree.co.uk/slack';
       const mouseDownDuration = OutletScrape.notARobot();



       this.setPath(path.resolve(`${__dirname }/../artefacts/outlet`));



       await this._initBrowser(true);
       await this._createBrowserPage();

     //  await this.page.tracing.start({ 'path': `${this.path}/trace.json`, 'screenshots':true });

       await this.page.setViewport({ 'width': 1200, 'height': 800 });
       await this._goto(this.startPage);

       await this._randomWait(this.page, 3, 5);
      //  await this.page.waitForSelector('#SI_ID_Head_FromPrice');
       logger.debug('loaded..');
     //  await this.page.click('#ctl00_cphRegistersMasterPage_lblViewList > a', { 'delay':mouseDownDuration });*/
     }
     catch(e) {
       throw new Error(e);
     }
   }


  /**
     * Grab the Pdf's and screenshots
     * @returns {Promise<void>}
     */
    async __run() {
      try {

        logger.debug('run');
        await this.start();

        await this.process();



        logger.debug('Done...');

       // await this._randomWait(this.page, 5, 10);
       // await this._makeScreenshotV2(this.page, `${ this.path}/Central Bank of Ireland Registers`, null);

       // const sections = ['Registers of Payment Services Firms', 'Registers of E-Money Firms', 'Register of Credit Institutions'];

        /*for (const section of sections)
          await this.grabSection('#ctl00_cphRegistersMasterPage_downloadsSection', section);

        this.emit('done');*/
      }
      catch(e) {
        throw new Error(e);
      }
    }
}

module.exports = OutletScrape;