// filepath: c:\Users\amaizy\Desktop\cvgen\controllers\linkedin.js

const axios = require("axios");
const querystring = require("querystring");
const puppeteer = require("puppeteer");

const clientId = "780w7gsy8eysmj";
const clientSecret = "WPL_AP1.w6OTTkAndAdT3PYF.UZEcwQ==";
const redirectUri = "http://localhost:4200/api/auth/linkedin/callback";
const scope = "openid profile email";

const email = "amaury@maizy.net";
const password = "2Qh*fJrp+l7M6g>8P~}/S$Bc2Yvf&-vd";

let accessToken = "";

const authenticateUser = (req, res) => {
  const authUrl = `https://www.linkedin.com/oauth/v2/authorization?${querystring.stringify(
    {
      response_type: "code",
      client_id: clientId,
      redirect_uri: redirectUri,
      scope: scope,
    }
  )}`;
  res.redirect(authUrl);
};

const handleCallback = async (req, res) => {
  const { code } = req.query;

  try {
    const tokenResponse = await axios.post(
      "https://www.linkedin.com/oauth/v2/accessToken",
      querystring.stringify({
        grant_type: "authorization_code",
        code: code,
        redirect_uri: redirectUri,
        client_id: clientId,
        client_secret: clientSecret,
      })
    );

    const accessToken = tokenResponse.data.access_token;

    // Stocke dans la session
    req.session.user = {
      accessToken,
    };

    // Redirige vers /profile après authentification
    res.redirect("/profile");
  } catch (error) {
    console.error(
      "LinkedIn token error:",
      error.response ? error.response.data : error.message
    );
    res.status(500).send("Error retrieving access token.");
  }
};

const getUserProfile = async (req, res) => {
  try {
    const token = req.session?.user?.accessToken;
    if (!token) {
      return res.status(401).json({ error: "Aucun accessToken en session." });
    }

    const { data } = await axios.get("https://api.linkedin.com/v2/userinfo", {
      headers: {
        Authorization: `Bearer ${token}`,
        Accept: "application/json",
      },
    });

    // Enregistre les infos utiles en session
    req.session.user.nom = data.given_name + " " + data.family_name;
    req.session.user.img = data.picture;
    req.session.user.email = data.email;

    // Redirige vers /me après authentification
    res.redirect("/me");
  } catch (error) {
    console.error(
      "LinkedIn OIDC error:",
      error.response?.data || error.message
    );
    return res
      .status(500)
      .json({ error: "Erreur lors de la récupération du profil." });
  }
};

const scrapeLinkedInProfile = async (profileUrl) => {
  const browser = await puppeteer.launch({ headless: false }); // headless: true si tu veux sans UI
  const page = await browser.newPage();

  // 1. Aller sur la page de login
  await page.goto("https://www.linkedin.com/login", {
    waitUntil: "networkidle2",
  });

  // 2. Connexion avec identifiants
  await page.type("#username", email, { delay: 50 });
  await page.type("#password", password, { delay: 50 });
  await Promise.all([
    page.click('[type="submit"]'),
    page.waitForNavigation({ waitUntil: "networkidle2" }),
  ]);

  // 3. Aller sur le profil
  await page.goto(profileUrl, { waitUntil: "networkidle2" });

  // 4. Extraire les infos
  const profileData = await page.evaluate(() => {
    const getText = (selector) =>
      document.querySelector(selector)?.innerText || null;
    const getAllText = (selector) =>
      Array.from(document.querySelectorAll(selector)).map((el) =>
        el.innerText.trim()
      );

    return {
      name: getText(".pv-text-details__left-panel h1"),
      headline: getText(".pv-text-details__left-panel .text-body-medium"),
      location: getText(".pv-text-details__left-panel .text-body-small"),
      about:
        getText(".pv-about-section") ||
        getText(".display-flex.ph5.pv3 .break-words"),
      experiences: getAllText(".pv-entity__summary-info"),
      education: getAllText(".pv-education-entity"),
      skills: getAllText(".pv-skill-category-entity__name-text"),
    };
  });

  await browser.close();
  return profileData;
};

module.exports = {
  authenticateUser,
  handleCallback,
  getUserProfile,
  scrapeLinkedInProfile,
};