const axios = require("axios");

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

const BOT_ID = "1410258710407811082";
const BOT_SECRET = "Bn5FGfrNZCdG1XpCciOcLkzLmrz6fhib";
const REDIRECT_URI = "http://localhost:3000/auth/discord/callback";

exports.handleDiscordAuth = 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", BOT_ID);
        params.append("client_secret", BOT_SECRET);
        params.append("grant_type", "authorization_code");
        params.append("code", code);
        params.append("redirect_uri", REDIRECT_URI);
        params.append("scope", "identify email");
        const tokenData = await axios.post(
            "https://discord.com/api/oauth2/token",
            params,
            {
                headers: {
                    "Content-Type": "application/x-www-form-urlencoded",
                },
            }
        );
        const accessToken = tokenData.data.access_token;
        const userResponse = await axios.get("https://discord.com/api/users/@me", {
            headers: {
                Authorization: `Bearer ${accessToken}`,
            },
        });
        const userData = userResponse.data;
        if (!userData || !userData.id) {
            console.error('Réponse Discord inattendue:', userResponse.data);
            return res.status(500).json({ error: "Impossible de récupérer les infos utilisateur depuis Discord", details: userResponse.data });
        }
        let savedUser = await getUserByDId(userData.id);
        if (!savedUser) {
            const newUser = {
                username: userData.username,
                discord_id: userData.id,
                avatar: userData.avatar
                    ? `https://cdn.discordapp.com/avatars/${userData.id}/${userData.avatar}.png`
                    : null,
            };
            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 Discord" });
    }
};