@page "/"
@using SpotifyAPI.Web
@using System
@using Microsoft.Extensions.Configuration

@inject IConfiguration Configuration
@inject NavigationManager navManager

<h1>Hello, world!</h1>

<p>SPOTIFY_CLIENT_ID: @(Configuration["SPOTIFY_CLIENT_ID"] ?? "Not set, example won't work")</p>
<p>

</p>

@if (_isAuthed && _me != null)
{
  <h2>Welcome @_me.DisplayName!</h2>
  <p>
    You have a grant total of @_totalPlaylistCount playlists!
  </p>
}
else
{
  <span>To get started:</span>
  <a href="@_authUri">
    Login via Spotify
  </a>
}

@code {
  private bool _isAuthed = false;

  private PrivateUser _me;

  private int _totalPlaylistCount;

  private Uri _authUri;

  protected override void OnInitialized()
  {
    if (!string.IsNullOrEmpty(Configuration["SPOTIFY_CLIENT_ID"]))
    {
      var baseUri = navManager.ToAbsoluteUri(navManager.BaseUri);

      var loginRequest = new LoginRequest(baseUri, Configuration["SPOTIFY_CLIENT_ID"], LoginRequest.ResponseType.Token)
      {
        Scope = new[] { Scopes.PlaylistReadPrivate, Scopes.PlaylistReadCollaborative }
      };
      _authUri = loginRequest.ToUri();
    }
  }

  protected override async Task OnInitializedAsync()
  {
    var uri = new Uri(navManager.Uri);
    var maxLen = Math.Min(1, uri.Fragment.Length);
    Dictionary<string, string> fragmentParams = uri.Fragment.Substring(maxLen)?
      .Split("&", StringSplitOptions.RemoveEmptyEntries)?
      .Select(param => param.Split("=", StringSplitOptions.RemoveEmptyEntries))?
      .ToDictionary(param => param[0], param => param[1]) ?? new Dictionary<string, string>();

    Console.WriteLine(fragmentParams);

    _isAuthed = fragmentParams.ContainsKey("access_token");
    if (_isAuthed)
    {
      var spotify = new SpotifyClient(fragmentParams["access_token"]);

      _me = await spotify.UserProfile.Current();
      _totalPlaylistCount = (await spotify.Playlists.CurrentUsers()).Total;
    }
  }
}