using System.Windows.Media;

namespace System.Windows.Forms
{
    public partial class ListViewItem : INotifyPropertyChangedImpl
    {
        private ListView owner;
        private string savedText;

        public string Text
        {
            get => SubItems[0].Text;
            set
            {
                if (SubItems[0].Text != value)
                {
                    SubItems[0].Text = value;
                    this.RaisePropertyChanged();
                }
            }
        }

        private int imageIndex = -1;
        public int ImageIndex
        {
            get => imageIndex;
            set
            {
                imageIndex = value;
                ResetImageSource();
            }
        }

        private ImageSource imageSource;
        public ImageSource ImageSource
        {
            get
            {
                if (imageSource == null)
                {
                    if (owner.SmallImageList != null && imageIndex != -1)
                        imageSource = owner.SmallImageList.Images.ImageSources[imageIndex];
                }
                return imageSource;
            }
        }

        public int ImageSourceWidth => owner?.SmallImageList != null ? (int)(owner.SmallImageList.ImageSize.Width / owner.DpiScale) : 16;
        public int ImageSourceHeight => owner?.SmallImageList != null ? (int)(owner.SmallImageList.ImageSize.Height / owner.DpiScale) : 16;

        private ListViewGroup group;
        public ListViewGroup Group
        {
            get => group;
            set
            {
                group = value;
                owner?.Items.ResetBindings();
            }
        }

        private bool isEditing;
        public bool IsEditing
        {
            get => isEditing;
            set => this.RaiseAndSetIfChanged(ref isEditing, value);
        }

        // this is WPF one
        private bool isSelected;
        public bool IsSelected
        {
            get => isSelected;
            set
            {
                if (isSelected != value)
                {
                    this.RaiseAndSetIfChanged(ref isSelected, value);
                    if (owner != null)
                        owner.DoItemSelect(this);
                }
            }
        }

        // this is Winforms one
        public bool Selected
        {
            get => IsSelected;
            set => IsSelected = value;
        }

        public ListViewSubItemCollection SubItems { get; }

        public int Index => owner.Items.IndexOf(this);

        public object Tag { get; set; }

        internal void SetOwner(ListView owner) => this.owner = owner;

        internal void ResetImageSource()
        {
            imageSource = null;
            RaisePropertyChanged("ImageSource");
            RaisePropertyChanged("ImageSourceWidth");
            RaisePropertyChanged("ImageSourceHeight");
        }

        public void BeginEdit()
        {
            owner.CancelEdit();
            owner.control.UpdateLayout();

            var args = new LabelEditEventArgs(owner.Items.IndexOf(this));
            owner.DoOnBeforeLabelEdit(args);
            if (!args.CancelEdit)
            {
                savedText = Text;
                IsEditing = true;
                owner.SetEditedItem(this);
            }
        }

        internal void EndEdit(bool cancel)
        {
            var args = new LabelEditEventArgs(owner.Items.IndexOf(this), cancel ? null : Text);
            owner.DoOnAfterLabelEdit(args);
            if (args.CancelEdit)
                cancel = true;

            IsEditing = false;
            if (cancel)
                Text = savedText;
            owner.SetEditedItem(null);
        }

        public void Remove() => owner.Items.Remove(this);

        public ListViewItem()
        {
            SubItems = new(this);
        }

        public ListViewItem(string text) : this()
        {
            Text = text;
        }

        public ListViewItem(string text, int imageIndex) : this()
        {
            Text = text;
            ImageIndex = imageIndex;
        }
    }
}