using Microsoft.AppCenter;
using Microsoft.AppCenter.Analytics;
using Microsoft.AppCenter.Crashes;
using System;
using System.Linq;
using System.Collections.Generic;
using System.Diagnostics;
using Windows.ApplicationModel;
using FoxTube.Services;

namespace FoxTube.Utils
{
	public static class Metrics
	{
		static readonly Stopwatch sw = new Stopwatch();
		public static TimeSpan Uptime
		{
			get => Storage.GetValue<TimeSpan?>(Storage.Metrics.Uptime) ?? TimeSpan.FromSeconds(0);
			set => Storage.SetValue(Storage.Metrics.Uptime, value);
		}
		public static string CurrentVersion
		{
			get
			{
				PackageVersion v = Package.Current.Id.Version;
				return $"{v.Major}.{v.Minor}.{v.Revision}.{v.Build}";
			}
		}

		static Metrics()
		{
			sw.Start();
			if (!Storage.GetValue<bool>(Storage.Settings.AllowAnalytics))
				return;

			AppCenter.Start(SecretConstants.MetricsId, typeof(Analytics), typeof(Crashes));
			AppCenter.SetCountryCode(Storage.GetValue<string>(Storage.Settings.Region));
			AppCenter.LogLevel = LogLevel.Verbose;
		}

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

			if (Storage.GetValue<bool>(Storage.Settings.AllowAnalytics))
				AddEvent("Session closed",
					("Duration", sw.Elapsed.ToString()),
					("Spend time total", Uptime.ToString()));
		}

		public static void AddEvent(string eventName, params (string key, string value)[] details)
		{
			if (Storage.GetValue<bool>(Storage.Settings.AllowAnalytics))
				Analytics.TrackEvent(eventName,
					details.Length < 1 ? null :
						details.Select(i => new KeyValuePair<string, string>(i.key, i.value)) as Dictionary<string, string>);
		}

		public static void SendReport(Exception exception, ErrorAttachmentLog[] logs = null, params (string key, string value)[] details)
		{
			if (Storage.GetValue<bool>(Storage.Settings.AllowAnalytics))
			{
				logs ??= new ErrorAttachmentLog[0];
				Crashes.TrackError(exception ?? new Exception("Unknown exception"),
					details.Length < 1 ? null :
						details.Select(i => new KeyValuePair<string, string>(i.key, i.value)) as Dictionary<string, string>,
					logs);
			}
		}
	}
}