const { downloadJSON } = require("./misc");
const model = require("./model");
require("./views");

function newCart() {
    let name = prompt("Name für Warenkorb eingeben:");
    if (!name || name.trim().length == 0) return;
    name = name.trim();
    if (model.carts.carts.some((cart) => cart.name === name)) {
        alert("Warenkorb mit Namen '" + name + "' existiert bereits");
        return;
    }
    model.carts.add(name);
    location.href = `/cart.html?name=${encodeURIComponent(name)}`;
}

function importCarts(importedCarts) {
    for (const importedCart of importedCarts) {
        const items = [];
        for (const cartItem of importedCart.items) {
            const item = model.items.lookup[cartItem.store + cartItem.id];
            if (!item) continue;
            items.push(item);
        }
        importedCart.items = items;

        const index = model.carts.carts.findIndex((cart) => cart.name === importedCart.name);
        if (index != -1) {
            if (confirm("Existierenden Warenkorb '" + importedCart.name + " überschreiben?")) {
                model.carts.carts[index] = importedCart;
            }
        } else {
            model.carts.carts.push(importedCart);
        }
    }
    model.carts.save();
}

(async () => {
    await model.load();
    document.querySelector("#carts").model = model.carts;
    document.querySelector("#new").addEventListener("click", () => newCart());
    document.querySelector("#export").addEventListener("click", () => downloadJSON("carts.json", model.carts.carts));
    document.querySelector("#import").addEventListener("click", () => document.querySelector("#fileInput").click());
    document.querySelector("#fileInput").addEventListener("change", function (event) {
        const reader = new FileReader();
        reader.onload = (event) => {
            const importedCarts = JSON.parse(event.target.result);
            importCarts(importedCarts);
        };
        reader.readAsText(event.target.files[0]);
    });
})();