using InABox.Mobile;
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Xamarin.Forms;

namespace comal.timesheets
{
    public static class NotifyMobileChanges
    {
        public static string Notifiy()
        {
            RemoveOldProperties();

            string latestChanges = "";
            List<string> changes = new List<string>
                {
                "- Update to assignments (use actual/booked)",
                "- Improve digital form viewing from tasks",
                "- Improve PDF viewer for Androids"
                };
            foreach (string s in changes)
            {
                latestChanges = s + System.Environment.NewLine + latestChanges;
            }
            if (App.Current.Properties.ContainsKey("NotifiedOfChanges" + MobileUtils.AppVersion.InstalledVersionNumber))
                return "";
            else
            {
                App.Current.Properties.Add("NotifiedOfChanges" + MobileUtils.AppVersion.InstalledVersionNumber, "True");
                return latestChanges;
            }
            
        }

        private static void RemoveOldProperties()
        {
            if (App.Current.Properties.Count > 0)
            {
                List<string> toDelete = new List<string>();
                foreach (string s in App.Current.Properties.Keys)
                {
                    if (s.Contains("NotifiedOfChanges"))
                    {
                        if (!s.Equals("NotifiedOfChanges" + MobileUtils.AppVersion.InstalledVersionNumber))
                        {
                            toDelete.Add(s);
                        }
                    }
                }
                foreach (string s in toDelete)
                {
                    App.Current.Properties.Remove(s);
                }
            }
        }
    }
}