using Google.Apis.Auth.OAuth2;
using Google.Apis.Services;
using Google.Apis.YouTube.v3;
using Google.Apis.YouTube.v3.Data;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Xml;
using Windows.ApplicationModel.Background;
using Windows.Storage;
using Windows.UI.Notifications;

namespace FoxTube.Background
{
    public sealed class BackgroundProcessor : IBackgroundTask
    {
        private DateTime lastCheck = DateTime.Now;

        private ApplicationDataContainer settings = ApplicationData.Current.LocalSettings;

        private ClientSecrets Secrets => new ClientSecrets()
        {
            ClientId = "349735264870-2ekqlm0a4mkg3mmrfcv90s3qp3o15dq0.apps.googleusercontent.com",
            ClientSecret = "BkVZOAaCU2Zclf0Zlicg6y2_"
        };
        private YouTubeService Service => new YouTubeService(new BaseClientService.Initializer()
        {
            ApiKey = "AIzaSyBgHrCnrlzlVmk0cJKL8RqP9Y8x6XSuk_0",
            ApplicationName = "FoxTube"
        });
        BackgroundTaskDeferral def;

        public async void Run(IBackgroundTaskInstance taskInstance)
        {
            def = taskInstance.GetDeferral();
            try
            {
                if (settings.Values["lastCheck"] == null)
                    settings.Values.Add("lastCheck", XmlConvert.ToString(DateTime.Now));
                else lastCheck = XmlConvert.ToDateTime(settings.Values["lastCheck"] as string, XmlDateTimeSerializationMode.Unspecified);
            }
            catch
            {
                lastCheck = DateTime.Now;
            }

            bool[] notificationsSettings = JsonConvert.DeserializeObject<bool[]>(await FileIO.ReadTextAsync(await ApplicationData.Current.RoamingFolder.GetFileAsync("notifications.json")));
            if(notificationsSettings[0])
                CheckAnnouncements();
            if(notificationsSettings[1])
                CheckAccount();

            settings.Values["lastCheck"] = XmlConvert.ToString(DateTime.Now, "YYYY-MM-DDThh:mm:ss");

            def.Complete();
            ToastNotificationManager.CreateToastNotifier().Show(Notification.GetInternalToast(null, "Background task complete", DateTime.Now.ToString(), null, null));
        }

        async void CheckAccount()
        {
            try
            {
                ToastNotificationManager.CreateToastNotifier().Show(Notification.GetInternalToast(null, "Checking videos...", DateTime.Now.ToString(), null, null));
                Dictionary<string, string> subscriptions = JsonConvert.DeserializeObject<Dictionary<string, string>>(await FileIO.ReadTextAsync(await ApplicationData.Current.RoamingFolder.GetFileAsync("background.json")));
                Debug.WriteLine("Subscriptions list");
                foreach (var i in subscriptions)
                    Debug.WriteLine($"{i.Key}: {i.Value}");
                Debug.WriteLine("Subscriptions list end");
                foreach (var s in subscriptions)
                {
                    SearchResource.ListRequest request = Service.Search.List("snippet");
                    request.PublishedAfter = lastCheck;
                    request.ChannelId = s.Key;
                    request.Type = "video";
                    request.MaxResults = 5;
                    SearchListResponse response = await request.ExecuteAsync();

                    foreach (var i in response.Items)
                        ToastNotificationManager.CreateToastNotifier().Show(
                            Notification.GetVideoToast(i.Id.VideoId, i.Snippet.ChannelId, i.Snippet.Title, i.Snippet.ChannelTitle, i.Snippet.Thumbnails.Medium.Url, s.Value));
                    
                    ToastNotificationManager.CreateToastNotifier().Show(Notification.GetVideoToast(null, s.Key, DateTime.Now.ToString(), s.Key, null, s.Value));
                }
            }
            catch { }

            ToastNotificationManager.CreateToastNotifier().Show(Notification.GetInternalToast(null, "New videos checked", DateTime.Now.ToString(), null, null));
        }

        void CheckAnnouncements()
        {
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(XmlReader.Create("http://foxgame.hol.es/foxtube-messages.xml"));
                if ((XmlConvert.ToDateTimeOffset((doc["posts"].FirstChild as XmlElement).GetAttribute("time"), "YYYY-MM-DDThh:mm:ss") - lastCheck.ToUniversalTime()).TotalSeconds > 0)
                    ToastNotificationManager.CreateToastNotifier().Show(
                        Notification.GetInternalToast(doc["posts"].FirstChild["id"].InnerText,
                        doc["posts"].FirstChild["header"].InnerText,
                        doc["posts"].FirstChild["content"].InnerText,
                        doc["posts"].FirstChild["thumbnail"].InnerText,
                        doc["posts"].FirstChild["avatar"].InnerText));
            }
            catch { }
        }
    }
}