using System.IO;

namespace System.Windows.Forms
{
    public abstract class FileDialog : IDisposable
    {
        protected internal Microsoft.Win32.FileDialog dialog;

        public string Title
        {
            get => dialog.Title;
            set => dialog.Title = value;
        }

        public string FileName
        {
            get => dialog.FileName;
            set => dialog.FileName = value;
        }

        public string Filter
        {
            get => dialog.Filter;
            set => dialog.Filter = value;
        }

        public int FilterIndex
        {
            get => dialog.FilterIndex;
            set => dialog.FilterIndex = value;
        }

        public string DefaultExt
        {
            get => dialog.DefaultExt;
            set => dialog.DefaultExt = value;
        }

        public string InitialDirectory
        {
            get => dialog.InitialDirectory;
            set
            {
                if (!string.IsNullOrEmpty(value))
                {
                    try
                    {
                        dialog.InitialDirectory = Path.GetFullPath(value);
                    }
                    catch 
                    {
                        dialog.InitialDirectory = "";
                    }
                }
                else
                {
                    dialog.InitialDirectory = value;
                }
            }
        }

        public bool CheckFileExists
        {
            get => dialog.CheckFileExists;
            set => dialog.CheckFileExists = value;
        }

        public bool CheckPathExists
        {
            get => dialog.CheckPathExists;
            set => dialog.CheckPathExists = value;
        }

        public void Dispose() { }

        public DialogResult ShowDialog()
        {
            return dialog.ShowDialog() == true ? DialogResult.OK : DialogResult.Cancel;
        }
    }
}