using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Diagnostics;
using System.Threading.Tasks;
using Windows.Foundation.Collections;
using Windows.Security.Authentication.Web;
using winsdkfb;
using winsdkfb.Graph;

namespace MultithreadingFinalTask.Models
{
	public class FacebookSocialNetwork : ISocialNetwork
	{
		private FBResult _loginResult;

		private const string _facebookAppID = "399131104308804";
		private readonly string[] _facebookPermissions = new[]
		{
			"public_profile",
			"email",
			"user_friends"
		};

		public async Task<string> LogIn()
		{
			var session = FBSession.ActiveSession;
			session.FBAppId = _facebookAppID;
			session.WinAppId =
				WebAuthenticationBroker.GetCurrentApplicationCallbackUri().ToString();

			var permissions = new FBPermissions(_facebookPermissions);
			_loginResult = await session.LoginAsync(permissions);

			await GetFriends();

			return FBSession.ActiveSession.User.Id;
		}

		public async void LogOut()
		{
			var session = FBSession.ActiveSession;
			await session.LogoutAsync();
		}

		public async Task<IUser[]> GetFriends()
		{
			string path = "/" + FBSession.ActiveSession.User.Id + "/friends";
			var factory = new FBJsonClassFactory(
				s => JsonConvert.DeserializeObject<FacebookUser[]>(JObject.Parse(s)["data"].ToString())
			);

			var singleValue = new FBSingleValue(path, null, factory);
			var result = await singleValue.GetAsync();
			var users = (FacebookUser[])result.Object;

			foreach(var user in users)
			{
				GetAvatar(user);
			}
			return users;
		}

		private async void GetAvatar(IUser user)
		{
			string path = "/" + FBSession.ActiveSession.User.Id + "/picture";
			var factory = new FBJsonClassFactory(
				s => JObject.Parse(s)["data"]["url"].ToString()
			);

			var props = new PropertySet();
			props.Add("redirect", "false");
			props.Add("width", "128");
			props.Add("height", "128");

			var singleValue = new FBSingleValue(path, props, factory);
			var result = await singleValue.GetAsync();

			user.AvatarUrl = (string)result.Object;
		}



	}
}