import express, { Express, Router, Request, Response } from "express";
import Joi from "joi"
import Bcrypt from "bcrypt"

import { client } from "../db";
import { RegisterBody } from "../interfaces/registerBody";
import jsonwebtoken, { JsonWebTokenError } from "jsonwebtoken";
import { DatabaseError } from "pg";
import { UserTokenData } from "../interfaces/auth";
import { private_key } from "../environment"

const router: Router = express.Router();

const registerSchema = Joi.object({
    firstname: Joi.string().min(2).required(),
    lastname: Joi.string().min(1).required(),
    email: Joi.string().email().required(),
    password: Joi.string().min(8).required()
});

router.post("/register", async (req: Request, res: Response) => {
    const validation = registerSchema.validate(req.body, { abortEarly: false });
    if (validation.error !== undefined) {
        return res.status(400).send(validation.error.details);
    }

    const userData: RegisterBody = validation.value;

    const password_hash: String = await Bcrypt.hash(userData.password, 10);

    try {
        const insertResult = await client.query(`
INSERT INTO users (first_name, last_name, email, password_hash)
VALUES ($1, $2, $3, $4)
RETURNING id;
        `, [
            userData.firstname,
            userData.lastname,
            userData.email,
            password_hash
        ]);

        const user = insertResult.rows[0];

        const jwtData: UserTokenData = {
            tokenType: "User",
            userId: user.id
        };

        const jwt: string = jsonwebtoken.sign(jwtData, private_key, { algorithm: "RS256", expiresIn: "4h" });

        res.cookie("auth-token", jwt, { httpOnly: true, maxAge: 60 * 60 * 4 });

        return res.status(200).send({ ...userData, password: undefined });
    } catch (error: DatabaseError | Error | any) {
        if (error.constraint == "users_email_key") {
            return res.status(400).send([{
                message: "\"email\" already exists",
                path: [
                    "email"
                ],
                type: "email.unique"
            }]);
        }
        console.error(error);
        return res.sendStatus(500);
    }
})

export default router;