import puppeteer from "puppeteer";
import { createDb, updateLoginDatas } from "../db/db";
import { Credentials } from "../types/auth";

const delay = async (ms: number) => {
  return new Promise((res, _rej) => {
    setTimeout(() => {
      res(() => {
        console.log("delay ends");
      });
    }, ms);
  });
};

function checkUrlForToken(url: string) {
  if (url.includes("long_lived_token")) {
    const splittedUrl = url.split("&");
    splittedUrl.forEach(async (urlPart: string) => {
      if (urlPart.includes("long_lived_token")) {
        const longLivedToken = urlPart.split("=")[1];
        await updateLoginDatas({ long_lived_token: longLivedToken });
      }
    });
  }
}
async function checkPageSourceForUserId(source: string) {
  const hasUserId = source.includes("USER_ID");
  if (hasUserId) {
    const part = source.substring(
      source.lastIndexOf('"USER_ID":') + 1,
      source.lastIndexOf('"NAME":')
    );
    const userId = part
      .replace('USER_ID":"', "")
      .replace('"', "")
      .replace(",", "");
    if (userId !== "0") {
      await updateLoginDatas({ user_id: userId });
    }
  }
}

async function facebookLogin(credentials: Credentials) {
  await createDb();
  const browser = await puppeteer.launch({
    headless: true,
    args: ["--no-sandbox", "--disable-setuid-sandbox"],
  });
  const page = await browser.newPage();

  const login = async () => {
    await page.goto("https://facebook.com", {
      waitUntil: "networkidle2",
    });
    // watch url change
    page.on("framenavigated", async (frame) => {
      const url = frame.url();
      checkUrlForToken(url);
      const source = await page.content();
      checkPageSourceForUserId(source);
    });
    // bypass cookie alert
    await page.keyboard.press("Enter");
    await delay(1000);
    // fill form
    await page.waitForSelector("#email");
    await page.type("#email", credentials.email);
    await page.type("#pass", credentials.password);
    await delay(500);
    // login
    await page.click("#loginbutton");
    await page.waitForNavigation();
  };
  const getToken = async () => {
    await page.goto(
      "https://www.facebook.com/dialog/oauth?client_id=464891386855067&redirect_uri=https://www.facebook.com/connect/login_success.html&scope=basic_info,email,public_profile,user_about_me,user_activities,user_birthday,user_education_history,user_friends,user_interests,user_likes,user_location,user_photos,user_relationship_details&response_type=token",
      {
        waitUntil: "networkidle2",
      }
    );
  };
  await login();
  await getToken();
  await browser.close();
}
export default facebookLogin;