using Google.Apis.Auth.OAuth2;
using Google.Apis.Oauth2.v2;
using Google.Apis.Oauth2.v2.Data;
using Google.Apis.Services;
using Google.Apis.YouTube.v3;
using Google.Apis.YouTube.v3.Data;
using System.Collections.Generic;
using System.Threading.Tasks;
using YouTube;
using YoutubeExplode;

namespace FoxTube.Models
{
	public class User
	{
		public Userinfoplus UserInfo { get; private set; }
		public UserCredential Credential { get; private set; }
		public Channel Channel { get; private set; }
		public List<Subscription> Subscriptions { get; } = new List<Subscription>();

		public ExtendedYouTubeService Service { get; private set; }
		public YoutubeClient Client { get; private set; }

		public static async Task<User> GetUser(UserCredential credential)
		{
			User user = new User();

			user.Credential = credential;
			BaseClientService.Initializer initializer = new BaseClientService.Initializer
			{
				ApplicationName = "FoxTube",
				HttpClientInitializer = credential
			};

			user.Service = new ExtendedYouTubeService(initializer);

			user.UserInfo = await new Oauth2Service(initializer).Userinfo.Get().ExecuteAsync();

			// TODO: Retrieve history and WL

			SubscriptionsResource.ListRequest subRequest = user.Service.Subscriptions.List("snippet");
			subRequest.Mine = true;
			subRequest.MaxResults = 50;
			subRequest.Order = SubscriptionsResource.ListRequest.OrderEnum.Relevance;
			SubscriptionListResponse subResponse;

			do
			{
				subResponse = await subRequest.ExecuteAsync();
				subRequest.PageToken = subResponse.NextPageToken;

				user.Subscriptions.AddRange(subResponse.Items);

			} while (!string.IsNullOrWhiteSpace(subRequest.PageToken));

			var request = user.Service.Channels.List("snippet,contentDetails,brandingSettings");
			request.Mine = true;
			user.Channel = request.Execute().Items[0];

			return user;
		}
	}
}