var express = require("express");
var crypto = require("crypto");

var Sequelize =  require('sequelize');
var config = require("./config.js");

var app = express();
var seq = new Sequelize(config.database_uri);


const Word = seq.define("word", {
    uuid: {type: Sequelize.UUID, primaryKey: true, defaultValue: Sequelize.UUIDV4, allowNull: false},
    word: {type: Sequelize.STRING, allowNull: false},
});


app.get("/create-signature", async (req, res) => {
    res.setHeader("Content-Type", "application/json");

    try {
        if(req.query["magic-word"].match("[^a-zA-Z0-9\-]")) {
            throw "invalid";
        } else {
            let signature = crypto.createHash("sha1")
                .update(config.signature_secret + req.query["magic-word"])
                .digest()
                .toString("hex");

            res.send(JSON.stringify({
                "signature": signature
            }));
        }
    } catch (e) {
        res.send(JSON.stringify({
            "signature": null
        }));
    }
});


app.get("/unlock-system", async (req, res) => {
    res.setHeader("Content-Type", "application/json");

    try {
        let signature = crypto.createHash("sha1")
            .update(config.signature_secret + req.query["magic-word"])
            .digest()
            .toString("hex");

        if(signature != req.query["signature"]) {
            throw "invalid";
        }

        let word = await Word.findOne({
            where: {
                "word": req.query["magic-word"]
            }
        });

        res.send(JSON.stringify({
            "correct": word !== null
        }));
    } catch (e) {
        res.send(JSON.stringify({
            "correct": false
        }));
    }
});


app.listen(42000);