const container = document.querySelector("#unity-container");
const canvas = document.querySelector("#unity-canvas");
const loadingBar = document.querySelector("#unity-loading-bar");
const progressBarFull = document.querySelector("#unity-progress-bar-full");
const fullscreenButton = document.querySelector("#unity-fullscreen-button");
const warningBanner = document.querySelector("#unity-warning");

// Shows a temporary message banner/ribbon for a few seconds, or
// a permanent error message on top of the canvas if type=="error".
// If type=="warning", a yellow highlight color is used.
// Modify or remove this function to customize the visually presented
// way that non-critical warnings and error messages are presented to the
// user.
function unityShowBanner(msg, type) {
    function updateBannerVisibility() {
        warningBanner.style.display = warningBanner.children.length ? "block" : "none";
    }
    const div = document.createElement("div");

    div.innerHTML = msg;
    warningBanner.appendChild(div);
    if (type == "error") {
        div.style = "background: red; padding: 10px;";
    } else {
        if (type == "warning") {
            div.style = "background: yellow; padding: 10px;";
        }
        setTimeout(() => {
            warningBanner.removeChild(div);
            updateBannerVisibility();
        }, 5000);
    }
    updateBannerVisibility();
}

const baseUrl = "/static/game";
const buildUrl = `${baseUrl}/Build`;
const loaderUrl = `${buildUrl}/WebGL.loader.js`;
const config = {
    dataUrl: `${buildUrl}/WebGL.data`,
    frameworkUrl: `${buildUrl}/WebGL.framework.js`,
    codeUrl: `${buildUrl}/WebGL.wasm`,
    streamingAssetsUrl: `${baseUrl}/StreamingAssets`,
    companyName: "DefaultCompany",
    productName: "game",
    productVersion: "1.0",
    showBanner: unityShowBanner
};

// By default Unity keeps WebGL canvas render target size matched with
// the DOM size of the canvas element (scaled by window.devicePixelRatio)
// Set this to false if you want to decouple this synchronization from
// happening inside the engine, and you would instead like to size up
// the canvas DOM size and WebGL render target sizes yourself.
// config.matchWebGLToCanvasSize = false;

if (/iPhone|iPad|iPod|Android/i.test(navigator.userAgent)) {

    // Mobile device style: fill the whole browser client area with the game canvas:

    const meta = document.createElement("meta");

    meta.name = "viewport";
    meta.content = "width=device-width, height=device-height, initial-scale=1.0, user-scalable=no, shrink-to-fit=yes";
    document.getElementsByTagName("head")[0].appendChild(meta);
    container.className = "unity-mobile";
    canvas.className = "unity-mobile";

    // To lower canvas resolution on mobile devices to gain some
    // performance, uncomment the following line:
    // config.devicePixelRatio = 1;
} else {

    // Desktop style: Render the game canvas in a window that can be maximized to fullscreen:

    canvas.style.width = "960px";
    canvas.style.height = "600px";
}

loadingBar.style.display = "block";

const script = document.createElement("script");

script.src = loaderUrl;
script.onload = () => {
    createUnityInstance(canvas, config, progress => {
        progressBarFull.style.width = `${100 * progress}%`;
    }).then(unityInstance => {
        loadingBar.style.display = "none";
        fullscreenButton.onclick = () => {
            unityInstance.SetFullscreen(1);
        };
    }).catch(message => {
        alert(message);
    });
};
document.body.appendChild(script);