const puppeteer = require('puppeteer');

class NetflixService {
  constructor(credentials) {
    this.credentials = credentials;
    this.endpoints = {
      activity: 'https://www.netflix.com/viewingactivity',
      login: 'https://www.netflix.com/pl/login',
      users: 'https://www.netflix.com/profiles/manage'
    }
  }

  async getActivityInfo() {
    // Todo: Remove existing files
    await this.fetchActivityFiles();
    // Todo: Parse downloaded files and return json data
  }

  async fetchActivityFiles() {
    const browser = await puppeteer.launch({ headless: false });
    const page = await browser.newPage();
    await page.setJavaScriptEnabled(true);
    await page._client.send('Page.setDownloadBehavior', { behavior: 'allow', downloadPath: './downloads' });

    await this.signIn(page, this.credentials);

    for (let i = 0; i < 4; ++i) {
      // Todo: Check if this is a user or 'create user' button
      await this.switchUser(page, i);
      await this.fetchActivity(page);
    }
  }

  async signIn(page, credentials) {
    const { identifier, password } = credentials;

    await page.goto(this.endpoints.login);
    await page.type('#id_userLoginId', identifier);
    await page.type('#id_password', password);
    await page.$eval('[data-uia=login-submit-button]', element => element.click());
  }

  async switchUser(page, index) {
    await page.goto(this.endpoints.users);
    await page.$eval('.profile-button a', element => element.click());
    await page.$eval(`.profile:nth-of-type(${index + 1}) .profile-link`, element => element.click());
    await page.waitForNavigation();
  }

  async fetchActivity(page) {
    await page.goto(this.endpoints.activity);
    await page.$eval('.viewing-activity-footer-download', element => element.click());
    await page.waitForNavigation();
  }
}

module.exports = NetflixService;