const express = require("express");

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

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

const todos = [];

const app = express();

app.use(express.json());

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

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

app.get("/todo/:index", (req, res) => {
    return res.json(todos[req.params.index]);
});

app.post("/todo", (req, res) => {
    try {
        todos.push(req.body.name);

        return res.json(todos);
    }
    catch(e) {
        console.error("Unable to parse body");

        return res.status(500).json(todos);
    }
});

app.put("/todo/:index", (req, res) => {
    try {
        todos[req.params.index] = req.body.name;

        return res.json(todos);
    }
    catch(e) {
        console.error("Unable to parse body");

        return res.status(500).json(todos);
    }
});

app.delete("/todo/:index", (req, res) => {
    todos.splice(req.params.index, 1);

    return res.json(todos);
});