using System;

namespace DHT.Desktop.Dialogs {
	public static class DialogResult {
		public enum All {
			Ok, Yes, No, Cancel
		}

		public enum OkCancel {
			Closed, Ok, Cancel
		}

		public enum YesNo {
			Closed, Yes, No
		}

		public enum YesNoCancel {
			Closed, Yes, No, Cancel
		}

		public static OkCancel ToOkCancel(this All? result) {
			return result switch {
			       null       => OkCancel.Closed,
			       All.Ok     => OkCancel.Ok,
			       All.Cancel => OkCancel.Cancel,
			       _          => throw new ArgumentException("Cannot convert dialog result " + result + " to ok/cancel.")
			};
		}

		public static YesNo ToYesNo(this All? result) {
			return result switch {
			       null    => YesNo.Closed,
			       All.Yes => YesNo.Yes,
			       All.No  => YesNo.No,
			       _       => throw new ArgumentException("Cannot convert dialog result " + result + " to yes/no.")
			};
		}

		public static YesNoCancel ToYesNoCancel(this All? result) {
			return result switch {
			       null       => YesNoCancel.Closed,
			       All.Yes    => YesNoCancel.Yes,
			       All.No     => YesNoCancel.No,
			       All.Cancel => YesNoCancel.Cancel,
			       _          => throw new ArgumentException("Cannot convert dialog result " + result + " to yes/no/cancel.")
			};
		}
	}
}