using System;
using System.Threading.Tasks;
using SpotifyAPI.Web.Auth;
using SpotifyAPI.Web.Enums;
using SpotifyAPI.Web.Models;

namespace SpotifyAPI.Web.Examples.CLI
{
    internal static class Program
    {
        private static string _clientId = ""; //"";
        private static string _secretId = ""; //"";

        // ReSharper disable once UnusedParameter.Local
        public static void Main(string[] args)
        {
            _clientId = string.IsNullOrEmpty(_clientId)
                ? Environment.GetEnvironmentVariable("SPOTIFY_CLIENT_ID")
                : _clientId;

            _secretId = string.IsNullOrEmpty(_secretId)
                ? Environment.GetEnvironmentVariable("SPOTIFY_SECRET_ID")
                : _secretId;

            Console.WriteLine("####### Spotify API Example #######");
            Console.WriteLine("This example uses AuthorizationCodeAuth.");
            Console.WriteLine(
                "Tip: If you want to supply your ClientID and SecretId beforehand, use env variables (SPOTIFY_CLIENT_ID and SPOTIFY_SECRET_ID)");

            var auth =
                new AuthorizationCodeAuth(_clientId, _secretId, "http://localhost:4002", "http://localhost:4002",
                    Scope.PlaylistReadPrivate | Scope.PlaylistReadCollaborative);
            auth.AuthReceived += AuthOnAuthReceived;
            auth.Start();
            auth.OpenBrowser();

            Console.ReadLine();
            auth.Stop(0);
            
            

        }

        private static async void AuthOnAuthReceived(object sender, AuthorizationCode payload)
        {
            var auth = (AuthorizationCodeAuth) sender;
            auth.Stop();

            Token token = await auth.ExchangeCode(payload.Code);
            var api = new SpotifyWebAPI
            {
                AccessToken = token.AccessToken,
                TokenType = token.TokenType
            };
            await PrintUsefulData(api);
        }

        private static async Task PrintAllPlaylistTracks(SpotifyWebAPI api, Paging<SimplePlaylist> playlists)
        {
            if (playlists.Items == null) return;
            
            playlists.Items.ForEach(playlist => Console.WriteLine($"- {playlist.Name}"));
            if(playlists.HasNextPage())
                await PrintAllPlaylistTracks(api, await api.GetNextPageAsync(playlists));
        }

        private static async Task PrintUsefulData(SpotifyWebAPI api)
        { 
            PrivateProfile profile = await api.GetPrivateProfileAsync();
            string name = string.IsNullOrEmpty(profile.DisplayName) ? profile.Id : profile.DisplayName;
            Console.WriteLine($"Hello there, {name}!");

            Console.WriteLine("Your playlists:");
            await PrintAllPlaylistTracks(api, api.GetUserPlaylists(profile.Id));
        }
    }
}