const axios = require("axios");

const { getUserByGId } = require('../users/getUsers');
const { postUser } = require('../users/postUsers');

const CLIEN_ID = "71229835507-9413gbpdamv2qbcb2ov8oda2oqgcsk8q.apps.googleusercontent.com";
const GOOGLE_SECRET = "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";
const GOOGLE_REDIRECT_URI = "http://localhost:3000/auth/google/callback";

exports.handleGoogleAuth = async (req, res) => {
    const code = req.query.code;
    if (!code) return res.status(400).json({ error: "Code de validation manquant" });
    try {
        const params = new URLSearchParams();
        params.append("client_id", CLIEN_ID);
        params.append("client_secret", GOOGLE_SECRET);
        params.append("grant_type", "authorization_code");
        params.append("code", code);
        params.append("redirect_uri", GOOGLE_REDIRECT_URI);
        const tokenData = await axios.post(
            "https://oauth2.googleapis.com/token",
            params,
            {
                headers: {
                    "Content-Type": "application/x-www-form-urlencoded",
                },
            }
        );
        const accessToken = tokenData.data.access_token;
        const userResponse = await axios.get("https://www.googleapis.com/oauth2/v2/userinfo", {
            headers: {
                Authorization: `Bearer ${accessToken}`,
            },
        });
        const userData = userResponse.data;
        if (!userData || !userData.id) {
            console.error("Réponse Google inattendue:", userResponse.data);
            return res.status(500).json({ error: "Impossible de récupérer les infos utilisateur depuis Google", details: userResponse.data });
        }
        let savedUser = await getUserByGId(userData.id);
        if (!savedUser) {
            const newUser = {
                username: userData.name || userData.email,
                google_id: userData.id,
            };
            savedUser = await postUser(newUser);
        }
        req.session.user = savedUser;
        res.redirect('/');
    } catch (err) {
        console.error(err.response?.data || err.message);
        res.status(500).json({ error: "Erreur lors de la connexion à Google" });
    }
};