using System.Collections.ObjectModel;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;
using Artemis.Core.Models.Surface;
using Stylet;

namespace Artemis.UI.Screens.Module.ProfileEditor.Visualization
{
    public class ProfileDeviceViewModel : PropertyChangedBase
    {
        public ProfileDeviceViewModel(Device device)
        {
            Device = device;
            Leds = new ObservableCollection<ProfileLedViewModel>();

            if (Device.RgbDevice != null)
                Task.Run(AddLedsAsync);
        }

        public ObservableCollection<ProfileLedViewModel> Leds { get; set; }
        public Device Device { get; set; }
        public bool AddedLeds { get; private set; }

        public double X
        {
            get => Device.X;
            set => Device.X = value;
        }

        public double Y
        {
            get => Device.Y;
            set => Device.Y = value;
        }

        public int ZIndex
        {
            get => Device.ZIndex;
            set => Device.ZIndex = value;
        }


        public Rect DeviceRectangle => Device.RgbDevice == null
            ? new Rect()
            : new Rect(X, Y, Device.RgbDevice.Size.Width, Device.RgbDevice.Size.Height);

        /// <summary>
        ///     Adds LEDs in batches of 5 to avoid UI freezes
        /// </summary>
        /// <returns></returns>
        private async Task AddLedsAsync()
        {
            var index = 0;
            foreach (var led in Device.RgbDevice.ToList())
            {
                Execute.OnUIThreadSync(() => Leds.Add(new ProfileLedViewModel(led)));
                if (index % 5 == 0)
                    await Task.Delay(1);

                index++;
            }

            AddedLeds = true;
        }

        /// <summary>
        ///     Update the color of all LEDs if finished adding
        /// </summary>
        public void Update()
        {
            if (!AddedLeds)
                return;

            foreach (var ledViewModel in Leds)
                ledViewModel.Update();
        }
    }
}