using Microsoft.AppCenter;
using Microsoft.AppCenter.Analytics;
using Microsoft.AppCenter.Crashes;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Net.Http;
using System.Threading.Tasks;
using Windows.ApplicationModel;
using Windows.Storage;

namespace FoxTube
{
    public static class Metrics
    {
        static readonly ApplicationDataContainer storage = ApplicationData.Current.RoamingSettings;

        static readonly Stopwatch sw = new Stopwatch();
        public static TimeSpan Uptime
        {
            get => (TimeSpan?)storage.Values["Metrics.SpentTime"] ?? TimeSpan.FromSeconds(0);
            set => storage.Values["Metrics.SpentTime"] = value;
        }
        public static string CurrentVersion
        {
            get
            {
                PackageVersion v = Package.Current.Id.Version;
                return $"{v.Major}.{v.Minor}.{v.Revision}.{v.Build}";
            }
        }

        public static void StartSession()
        {
            sw.Start();
            AppCenter.Start("45774462-9ea7-438a-96fc-03982666f39e", typeof(Analytics), typeof(Crashes));
            AppCenter.SetCountryCode(Settings.Region);
        }

        public static void EndSession()
        {
            sw.Stop();
            Uptime += sw.Elapsed;

            AddEvent("Session closed",
                ("Duration", sw.Elapsed.ToString()),
                ("Spend time total", Uptime.ToString()));
        }

        public static void AddEvent(string eventName, params (string key, string value)[] details)
        {
            Dictionary<string, string> parameters = new Dictionary<string, string>();
            foreach (var (key, value) in details)
                parameters.Add(key, value);
            Analytics.TrackEvent(eventName, parameters.Count > 0 ? parameters : null);
        }

        public static async Task<string> SendExtendedData(string packageTitle, string content)
        {
            // TODO: Add backend
            using(HttpClient client = new HttpClient())
            {
                HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, "https://xfox111.net/FoxTube/AddMetrics");
                Dictionary<string, string> body = new Dictionary<string, string>
                {
                    { "Title", packageTitle },
                    { "Content", content },
                    { "Version", CurrentVersion }
                };
                request.Content = new FormUrlEncodedContent(body);
                HttpResponseMessage response = await client.SendAsync(request);
                return await response.Content.ReadAsStringAsync();
            }
        }
    }
}