const axios = require('axios');
const qs = require('qs');
require('dotenv').config();

const client_id = process.env.SPOTIFY_API_ID; // Your client id
const client_secret = process.env.SPOTIFY_CLIENT_SECRET; // Your secret
const auth_token = Buffer.from(`${client_id}:${client_secret}`, 'utf-8').toString('base64');

const getAuth = async () => {
    try {
        //make post request to SPOTIFY API for access token, sending relavent info
        const token_url = 'https://accounts.spotify.com/api/token';
        const data = qs.stringify({ 'grant_type': 'client_credentials' });

        const response = await axios.post(token_url, data, {
            headers: {
                'Authorization': `Basic ${auth_token}`,
                'Content-Type': 'application/x-www-form-urlencoded'
            }
        })
        //return access token
        return response.data.access_token;
        //console.log(response.data.access_token);   
    } catch (error) {
        //on fail, log the error in console
        console.log(error);
    }
}

const getFirstTrackAlbum = async (album_id) => {
    //request token using getAuth() function
    const access_token = await getAuth();
    //console.log(access_token);

    const api_url = `https://api.spotify.com/v1/albums/${album_id}/tracks`;
    //console.log(api_url);
    try {
        const response = await axios.get(api_url, {
            headers: {
                'Authorization': `Bearer ${access_token}`
            }
        })
        .then(function (response) {
            // handle success
            // console.log(response.data);

            let firstTrack = response.data.items[0].name;
            console.log("First Track: " + firstTrack);

            return response.data;

        });;
        //console.log(response.data);
        //   return response.data;
    } catch (error) {
        console.log(error);
    }
};

const getFirstArtistAlbums = async (artist_id) => {
    //request token using getAuth() function
    const access_token = await getAuth();
    //console.log(access_token);

    const api_url = `https://api.spotify.com/v1/artists/${artist_id}/albums`;
    //console.log(api_url);
    try {
        const response = await axios.get(api_url, {
            headers: {
                'Authorization': `Bearer ${access_token}`
            }
        })
        .then(function (response) {
            // handle success
            //   console.log(response.data);
            let firstAlbum = response.data.items[0].name;
            let firstAlbumId = response.data.items[0].id;

            console.log("First Album: " + firstAlbum);
            console.log("First Album id: " + firstAlbumId);

            getFirstTrackAlbum(firstAlbumId);

            return response.data;

        });
        // console.log(response.data);
    } catch (error) {
        console.log(error);
    }
};

// console.log(getFirstArtistAlbums('0TnOYISbd1XYRBk9myaseg'));
getFirstArtistAlbums('0TnOYISbd1XYRBk9myaseg');