using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;


namespace BodyshopPartner.Utils.Growls
{
    public partial class GrowlNotification
    {
        private const byte MAX_NOTIFICATIONS = 4;
        private int count;
        public Notifications Notifications = new Notifications();
        private readonly Notifications buffer = new Notifications();
        public ViewModels.MainViewModel ShellVm;
        public GrowlNotification(ViewModels.MainViewModel shellViewModel)
        {
            InitializeComponent();
            ShellVm = shellViewModel;
            NotificationsControl.DataContext = Notifications;
            var desktopWorkingArea = System.Windows.SystemParameters.WorkArea;
            this.Left = desktopWorkingArea.Right - 425;
            //this.Top = desktopWorkingArea.Bottom - 425;
            this.Top = 50;
        }

        public void AddNotification(Notification notification)
        {
            notification.Id = count++;
            if (Notifications.Count + 1 > MAX_NOTIFICATIONS)
                buffer.Add(notification);
            else
                Notifications.Add(notification);
            //Show window if there're notifications
            if (Notifications.Count > 0 && !IsActive)
                Show();
        }
        public void RemoveNotification(Notification notification)
        {
            if (Notifications.Contains(notification))
                Notifications.Remove(notification);
            if (buffer.Count > 0)
            {
                Notifications.Add(buffer[0]);
                buffer.RemoveAt(0);
            }
            //Close window if there's nothing to show
            if (Notifications.Count < 1)
                Hide();
        }
        private void NotificationWindowSizeChanged(object sender, SizeChangedEventArgs e)
        {
            if (e.NewSize.Height != 0.0)
                return;
            var element = sender as Grid;
            RemoveNotification(Notifications.First(
              n => n.Id == Int32.Parse(element.Tag.ToString())));
        }

        private void NotificationWindow_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            Notification n = (Notification)((Grid)sender).DataContext;
            BringWindowToFront();
            RemoveNotification(n);
        }

        static void BringWindowToFront()
        {
            var currentProcess = Process.GetCurrentProcess();
            var processes = Process.GetProcessesByName(currentProcess.ProcessName);
            var process = processes.FirstOrDefault(p => p.Id == currentProcess.Id);
            if (process == null) return;

            SetForegroundWindow(process.MainWindowHandle);
        }

        [DllImport("user32.dll")]
        static extern bool SetForegroundWindow(IntPtr hWnd);
    }
}
