///////////////
// PARAMETRS //
///////////////

const queryString = window.location.search;
const urlParams = new URLSearchParams(queryString);

const code = urlParams.get("code") || "";

const baseURL = "https://nuttylmao.github.io/spotify-widget";
const redirect_uri = `${baseURL}/configure`;
let refresh_token = "";
let access_token = "";
let browserSourceURL = "";



/////////////////////////
// AUTHORIZATION STUFF //
/////////////////////////

function RequestAuthorization() {
    const client_id = document.getElementById("client_id_box").value;
    const client_secret = document.getElementById("client_secret_box").value;
    localStorage.setItem("client_id", client_id);
    localStorage.setItem("client_secret", client_secret);

    let url = "https://accounts.spotify.com/authorize";
    url += "?client_id=" + client_id;
    url += "&response_type=code";
    url += "&redirect_uri=" + encodeURI(redirect_uri);
    url += "&show_dialog=true";
    url += "&scope=user-read-private user-read-email user-modify-playback-state user-read-playback-position user-library-read streaming user-read-playback-state user-read-recently-played playlist-read-private";
    window.location.href = url;
}

// If there is no code in the query string, direct the user to authorize their account
if (code != "") {
    FetchAccessToken(code);
}
else {
    document.getElementById("connectBox").style.display = 'inline';
}

async function FetchAccessToken(code) {
    const client_id = localStorage.getItem("client_id");
    const client_secret = localStorage.getItem("client_secret");
    console.debug(`Client ID: ${client_id}`);
    console.debug(`Client Secret: ${client_secret}`);

    let body = "grant_type=authorization_code";
    body += "&code=" + code;
    body += "&redirect_uri=" + encodeURI(redirect_uri);
    body += "&client_id=" + client_id;
    body += "&client_secret=" + client_secret;
    console.log(body);

    // Get the current player information from Spotify
    const response = await fetch("https://accounts.spotify.com/api/token", {
        method: "POST",
        headers: {
            'Authorization': `Basic ${btoa(client_id + ":" + client_secret)}`,
            'Content-Type': 'application/x-www-form-urlencoded'
        },
        body: body
    });

    // If we got a response, save the access token
	if (response.ok)
    {
        const responseData = await response.json();
        console.debug(responseData);
        refresh_token = responseData.refresh_token;			// Unsure if we need to replace the refresh_token but do it just in case
        access_token = responseData.access_token;			// Save access token for all future API calls

        browserSourceURL = `${baseURL}?client_id=${client_id}&client_secret=${client_secret}&refresh_token=${refresh_token}`;
        document.getElementById("authorizationBox").style.display = 'inline';
    }
    else
    {
        console.error(`${response.status}`);
    }
}



///////////////////////////
// BUTTON CLICK HANDLERS //
///////////////////////////

const clientIdBox = document.getElementById('client_id_box');
const clientSecretBox = document.getElementById('client_secret_box');
const authorizeButton = document.getElementById('authorizeButton');

// Function to check if either input is empty
function checkInputs() {
    if (clientIdBox.value.trim() === '' || clientSecretBox.value.trim() === '') {
        authorizeButton.disabled = true;    // Disable the button
    } else {
        authorizeButton.disabled = false;   // Enable the button
    }
}

// Listen for changes in the input boxes
clientIdBox.addEventListener('input', checkInputs);
clientSecretBox.addEventListener('input', checkInputs);

// Initial check when the page loads, just in case
checkInputs();

function CopyToURL() {
    navigator.clipboard.writeText(browserSourceURL);

    document.getElementById("copyURLButton").innerText = "Copied to clipboard";
    document.getElementById("copyURLButton").style.backgroundColor = "#00dd63"
    document.getElementById("copyURLButton").style.color = "#ffffff";

    setTimeout(() => {
        document.getElementById("copyURLButton").innerText = "Click to copy URL";
        document.getElementById("copyURLButton").style.backgroundColor = "#ffffff";
        document.getElementById("copyURLButton").style.color = "#181818";
    }, 3000);
}

function OpenInstructions() {
    window.open("https://nuttylmao.notion.site/Spotify-Widget-18e19969b237807ca88cfc9c4159da15", '_blank').focus();
}

function OpenDonationPage() {
    window.open("http://nutty.gg/pages/donate", '_blank').focus();
}