const express      = require("express");
const htmlTemplate = require("./views/index.html");

const port = (() => {
    const index = process.argv.indexOf("--port");

    if (index >= 0) {
        return process.argv.indexOf("--port") + 1;
    }
    else {
        return 3000;
    }
})();

const app = express();

const todos = [];

app.listen(port, "0.0.0.0", () => {
    console.log(`Server listening on port ${port}`);
});

app.get("/", (req, res) => {
    return res.send(htmlTemplate(todos));
});

app.get("/todo", (req, res) => {
    todos.push(req.query.todo);

    return res.send(htmlTemplate(todos));
});

app.post("/todo", (req, res) => {
    let body = "";

    req
        .on("data", (chunk) => body += chunk)
        .on("end", () => {
            todos.push(body.split("=")[1]);

            return res.send(htmlTemplate(todos));
        });
});

app.post("/todo/delete", (req, res) => {
    let body = "";

    req
        .on("data", (chunk) => body += chunk)
        .on("end", () => {
            todos.splice(todos.indexOf(body.split("=")[1]), 1);

            return res.send(htmlTemplate(todos));
        });
});