import e from "express";
import cors from "cors";
import bodyParser from "body-parser";
import bcrypt from "bcrypt";
import Database from "better-sqlite3";

const app = e();
const port = 3000;
const db = new Database("./database.db");

app.use(cors());
app.use(e.json());
app.use(bodyParser.json());

app.get('/', (req, res) => {
    res.send("Nothing Here");
});

app.get('/currentRooms', (req, res) => {
    // req has no data
    // res has all room at current time
    console.log("currentRooms");
    let stmt = db.prepare(`SELECT * FROM TimeSlots`);
    let records = stmt.all();
    res.status(200).json({records: records});
});

app.post('/addTimeSlot', (req, res) => {
    // req has roomid userid starttime and end time
    // res has success or faliure
    console.log("addTimeSlot");
    const body = req.body;
    let roomid = parseInt(body.roomid);
    let userid = parseInt(body.userid);
    let stmt = db.prepare(`INSERT INTO TimeSlots (TimeStart, TimeEnd, Room) VALUES ('${body.startTime}', '${body.endTime}', ${roomid});`);
    stmt.run();
    stmt = db.prepare(`UPDATE Users SET Submissions = Submissions + 1 WHERE Id=${userid};`);
    stmt.run();
    res.status(200).send("added timeslot");
});

app.post('/addRoom', (req, res) => {
    // req has userid and roomname
    // res has success or faliure
    console.log("addRoom");
    const body = req.body;
    let name = req.body.roomName.toUpperCase();
    let stmt = db.prepare(`SELECT * FROM Rooms WHERE RoomName='${name}'`);
    let storedRecord = stmt.get();
    if (storedRecord) {
        res.status(400).send("room already exists");
        return;
    }
    stmt = db.prepare(`INSERT INTO Rooms (RoomName) VALUES (${name})`);
    stmt.run();
    stmt = db.prepare(`UPDATE Users SET Submissions = Submissions + 1 WHERE Id=${parseInt(body.userid)};`);
    stmt.run();
    res.status(200).send("added room");
});

app.get('/getRooms', (req, res) => {
    // req has no data
    // res has success or faliure
    console.log("getRooms");
    let stmt = db.prepare(`SELECT * FROM Rooms`);
    let records = stmt.all();
    res.status(200).send({records: records});
});

app.post('/createUser', async (req, res) => {
    // req has email pass(hashed) and name
    // res has success or fail
    console.log("sign up");
    const body = req.body;
    let stmt = db.prepare(`SELECT * FROM Users WHERE Email='${body.email}';`);
    let storedRecord = stmt.get();
    if (storedRecord) {
        res.status(400).send("account with that email already exists");
        return;
    }
    const generatedHash = await bcrypt.hash(body.pass, 10);
    stmt = db.prepare(`INSERT INTO Users (Email, Pass, Username, Submissions) VALUES ('${body.email}', '${generatedHash}', '${body.name}', 0)`);
    stmt.run();
    stmt = db.prepare(`SELECT Id FROM Users WHERE Email='${body.email}';`);
    const uid = stmt.get();
    res.status(200).send({uid: uid});
});

app.post('/login', async (req, res) => {
    // req has email and pass(hashed)
    // res has success or fail
    console.log("login");
    const body = req.body;
    let stmt = db.prepare(`SELECT Pass FROM Users WHERE Email='${body.email}';`);
    let storedHash = stmt.get();
    if (!storedHash) {
        res.status(400).send("problem with email");
        return;
    }
    if (await bcrypt.compare(body.pass, storedHash.Pass)){
        stmt = db.prepare(`SELECT Id FROM Users WHERE Email='${body.email}';`);
        const uid = stmt.get();
        res.status(200).send({uid: uid});
    } else {
        res.status(400).send("incorrect password");
    }
});

app.listen(port, () => {
    console.log(`Listening on ${port}`);
});