import xor from "../../../extra_modules/xor.js";
export const setup = function (router, con, server) {
    const PIDS = {}; //[pid]: true/"already_used"

    function createPID(){
        let pid = server.genstring(10); //collision chance is low enough, but we'll check anyways
        while (PIDS[pid] !== undefined) {
            pid = server.genstring(10);
            console.log(5, "pid collision");
        }
        PIDS[pid] = true;
        setTimeout(function() {
            PIDS[pid] = undefined;
        }, 40000);
        return pid
    }


    router.get("/api/dms/pid",  function (req, res) {
        res.set("Access-Control-Allow-Origin", "*");
        res.json({ "pid": createPID() });
    });
    router.post("/api/dms/post",  function (req, res) {
        if (!req.body.message) {
            res.status(410)
            res.json({ "error": "no message to post" });
            return;
        }
        if ((typeof req.body.message) !== "string") {
            res.status(411)
            res.json({ "error": "no message to post" });
            return;
        }
        if ((typeof req.body.pid) !== "string") {
            res.status(412)
            res.json({ "error": "no pid given" });
            return;
        }
        if (req.body.pid.length !== 10 || PIDS[req.body.pid] !== true) {
            res.status(413)
            res.json({ "error": "invalid pid given" });
            return;
        }
        PIDS[req.body.pid] = "already_used";
        let reply_id;
        if (!req.body.reply_id || req.body.reply_id < 0) {
            reply_id = 0;
        }
        else {
            reply_id = req.body.reply_id;
        }
        if ((typeof reply_id) !== "number") {
            res.status(414)
            res.json({ "error": "no valid reply id given" });
            return;
        }
        if (req.body.message.length > 1000) {
            res.status(415)
            res.json({ "error": "message too long" });
            return;
        }
        req.body.message = encodeURIComponent(req.body.message.trim());
        if (req.body.message.length > 3000) {
            res.status(416)
            res.json({ "error": "message too long" }); //check again after URI encoding it
            return;
        }
        req.body.receiver = encodeURIComponent(req.body.receiver || "");
        if (req.body.receiver === "" || req.body.receiver === encodeURIComponent(res.locals.username) || req.body.receiver.length > 100) {
            res.status(417).json({ "error": "invalid receiver given" });
            return;
        }
        let otherperson = req.body.receiver;
        if (!req.body.message) {
            res.status(418)
            res.json({ "error": "no message to post" });
            return;
        }
        let sql = `insert into ipost.dms (dms_user_name,dms_text,dms_time,dms_receiver,dms_from_bot,dms_reply_id) values (?,?,?,?,?,?);`;
        let values = [encodeURIComponent(res.locals.username), req.body.message, Date.now(), otherperson, res.locals.isbot, reply_id];
        con.query(sql, values, function (err, result) {
            if (err) {
                res.status(500)
                res.json({"error":"there's been an internal error"})
                console.error(err)
                return;
            }
            res.json({ "success": "successfully posted dm" });
            console.log(5, `posted new dm by ${res.locals.username} to ${otherperson} : ${xor(encodeURIComponent(res.locals.username), otherperson)}`);
        });
        //TODO: bring dms up-to-date with normal posts
    });
    return createPID
};
export default {
    setup
};