// This code is licensed under GNU GPLv3.
const BASE_URL = "/api/appinfo";
var TS4_APP_ID = 1222670;
const APPID_REGEX = /#((http(s)?:\/\/store\.steampowered\.com\/app\/)?(?<appID>\d{4,10})(.*))/
if(APPID_REGEX.test(window.location.hash)===true) {
    let matches = APPID_REGEX.exec(window.location.hash);
    TS4_APP_ID = parseInt(matches.groups.appID);
    console.debug("Set app ID to " + TS4_APP_ID);
} else {
    console.debug("No custom ID set or does not match regex.");
}
const PRICE_ELEMENT = document.getElementById("price");
const NAME_ELEMENT = document.getElementById("name");

/*
 * These prices are gathered from a range of sources, such as Tesco, Amazon, and CeX.
 * Some prices may no longer be correct. They do not include discounts.
 * Prices are often not updated after they're added. Prices are in GBP.
 *
 * Last updated: 2024-09-02
 */
const PRICES = {
    "Freddo (18g)": 0.25,
    "Skittles (136G)": 1.25,
    "Cadbury Fingers (114G)": 1.70,
    "howmuchdoesthesims4cost.lol": 1.78,
    "Pepsi Max (2L)": 2.00,
    "Pringles (Salt & Vinegar, 185g)": 2.25,
    "BLÅHAJ Soft toy, shark (40 cm)": 22.00,
    "Dell Optiplex 7040 USFF (6th generation Intel i5)": 25.00,
    "Tenda AC10 V3.0 AC1200 Dual Band Gigabit Wireless Cable Router": 27.99,
    "Seagate SkyHawk 4TB 3.5\" 7200RPM HDD": 30.00,
    "Dell Optiplex 7040 SFF (6th generation Intel i5)": 36.00,
    "Dell Optiplex 3020 USFF (4th generation Intel i5)": 39.99,
    "TP-Link AX1800 WiFi 6 Router": 39.99,
    "KIOXIA EXERIA NVMe M.2 SSD (1TB)": 43.20,  // I *wish* they still cost this much - ~nex 2024-09-02
    "Seagate BarraCuda,Internal Hard Drive 2.5 Inch (1TB)": 49.99,
    "Kingston NV2 NVMe PCIe 4.0 Internal SSD (1TB)": 59.99,
    "NVIDIA GeForce GTX 1650": 117.96,
    "AMD Radeon RX 5700 8GB (Second hand from CeX)": 150.00,
    "TP-Link AX5400 WiFi 6 Router": 159.99,
    "Intel Core i5-13400F": 191.99,
    "Apple Watch SE (1st generation)": 219.00,
    "Windows 11 Pro license": 219.99,  // https://www.microsoft.com/en-gb/d/windows-11-pro/dg7gmgf0d8h4/000P
    "HP ProBook 455 G8": 289.79,  // second hand from eBay, bought 2024-07-06
    "iPhone SE (3rd generation/5G/2022)": 499.00,
    "My custom PC (https://uk.pcpartpicker.com/user/nexy7574/saved/#view=cKYV4D)": 800.00,
    "NVIDIA GeForce RTX 4090": 1519.00,
}

function compare(price, item) {
    let n = Math.floor((price / PRICES[item]) * 100) / 100;
    if(n>=1) {
        n = Math.floor(n);
    };
    return n
}

function update(n, unit="$") {
    PRICE_ELEMENT.textContent = unit + n;
    console.debug("Updated price to: " + n);
}


function ids_to_body(ids) {
    return JSON.stringify({"app_ids": ids})
}

function ratelimited(response) {
    let retry_after = response.headers.get("retry-after");
    console.warn("Rate-limited for " + retry_after + " seconds.");
    setTimeout(() => {window.location.reload()}, retry_after * 1000);
    setInterval(
        () => {
            let element = document.getElementById("retry-after");
            let value = parseFloat(element.textContent);
            value -= 0.1;
            element.textContent = value.toFixed(1);
        },
        100
    )

    let element = document.getElementById("retrying");
    element.hidden = false;
    document.getElementById("retry-after").textContent = (retry_after * 1).toFixed(1);
    document.querySelector("main").hidden = true;
    document.querySelector("main").style.display = "none";
}


async function get_app_info(id) {
    const response = await fetch(BASE_URL, {method: "POST", body: ids_to_body([id]), headers: {"Content-Type": "application/json"}});
    if(response.status === 429) {
        ratelimited(response);
        return {id: {"name": "<rate limited>"}}
    }
    const data = await response.json();
    console.debug(data);
    return data;
}

async function calculate_price(ids) {
    console.debug("Calculating price for: " + ids);
    const response = await fetch(BASE_URL, {method: "POST", body: ids_to_body(ids), headers: {"Content-Type": "application/json"}});
    if(response.status === 429) {
        ratelimited(response);
        let o = {}
        for (let id of ids) {
            o[id] = {"price_overview": {"final": 0.0}}
        }
        return o
    }
    const data = await response.json();
    console.debug("mass price data:", data);

    let _price = 0.0;
    let unit = "£";
    for (let value of Object.values(data)) {
        console.debug("Value:", value)
        if (value.price_overview == null) {
            continue;
        }
        let new_unit = value.price_overview.final_formatted.slice(0, 1);
        if((/\d/).test(new_unit)) {
            //new_unit = value.price_overview.final_formatted.slice(-2, -1);
            new_unit = value.price_overview.currency || '£'
        }
        unit = new_unit
        _price += parseFloat(value.price_overview.final / 100);
    }
    return [_price, unit];
}

function find_unit(formatted) {
    let unit = "£";
    if((/\d/).test(formatted.slice(0, 1))) {
        unit = formatted.slice(-2, -1);
    }
    return unit;
}

async function main() {
    console.debug("Fetching app info for base game");
    let root;
    try {
        root = await get_app_info(TS4_APP_ID);
    } catch (e) {
        alert(`Error fetching information from Steam: ${e}`);
        window.location.reload();
    };

    console.debug("Fetching app info for DLCs");
    let key = Object.keys(root)[0];
    NAME_ELEMENT.textContent = root[key].name;
    console.debug("Checking key: " + key);
    let dlc_price = (root[key].price_overview || {final: 0.0}).final / 100;
    let unit = find_unit((root[key].price_overview || {final_formatted: "£0.00"}).final_formatted);
    if(root[key].dlc && root[key].dlc.length >= 0) {
        document.getElementById("dlcs").hidden = false;
        document.getElementById("dlc-count").textContent = root[key].dlc.length + " ";
        let _result= await calculate_price(root[key].dlc)
        dlc_price += _result[0];
    }

    if(root[key].header_image && root[key].capsule_image) {
        let element2 = document.createElement("img");
        element2.src = root[key].header_image;
        element2.alt = root[key].name;
        element2.style.height = "2em"
        NAME_ELEMENT.textContent = null;
        NAME_ELEMENT.appendChild(element2);
    }
    
    update(dlc_price.toFixed(2), unit);
    
    let element = document.getElementById("comparison");
    element.hidden = false;
    for(let item of Object.keys(PRICES)) {
        let price = compare(dlc_price, item);
        if(price >= 0.95) {
            let li = document.createElement("li");
            li.textContent = `${price}x ${item} (${unit}${PRICES[item]}/pc)`;
            element.children[1].appendChild(li);
        }
    };
}

main();