using System;

namespace LibationAvalonia.ViewModels.Dialogs
{
	public class MessageBoxViewModel
	{
		private string _message;
		public string Message { get { return _message; } set { _message = value; } }
		public string Caption { get; } = "Message Box";
		private MessageBoxButtons _button;
		private MessageBoxIcon _icon;
		private MessageBoxDefaultButton _defaultButton;

		public MessageBoxDefaultButton DefaultButton => _defaultButton;
		public MessageBoxButtons Buttons => _button;

		public bool IsAsterisk => _icon == MessageBoxIcon.Asterisk;
		public bool IsError => _icon == MessageBoxIcon.Error;
		public bool IsQuestion => _icon == MessageBoxIcon.Question;
		public bool IsExclamation => _icon == MessageBoxIcon.Exclamation;

		public bool HasButton3 => !string.IsNullOrEmpty(Button3Text);
		public bool HasButton2 => !string.IsNullOrEmpty(Button2Text);

		public int WindowHeight { get; private set; }
		public int WindowWidth { get; private set; }

		public string Button1Text => _button switch
		{
			MessageBoxButtons.OK => "OK",
			MessageBoxButtons.OKCancel => "OK",
			MessageBoxButtons.AbortRetryIgnore => "Abort",
			MessageBoxButtons.YesNoCancel => "Yes",
			MessageBoxButtons.YesNo => "Yes",
			MessageBoxButtons.RetryCancel => "Retry",
			MessageBoxButtons.CancelTryContinue => "Cancel",
			_ => string.Empty,
		};

		public string Button2Text => _button switch
		{
			MessageBoxButtons.OKCancel => "Cancel",
			MessageBoxButtons.AbortRetryIgnore => "Retry",
			MessageBoxButtons.YesNoCancel => "No",
			MessageBoxButtons.YesNo => "No",
			MessageBoxButtons.RetryCancel => "Cancel",
			MessageBoxButtons.CancelTryContinue => "Try",
			_ => string.Empty,
		};

		public string Button3Text => _button switch
		{
			MessageBoxButtons.AbortRetryIgnore => "Ignore",
			MessageBoxButtons.YesNoCancel => "Cancel",
			MessageBoxButtons.CancelTryContinue => "Continue",
			_ => string.Empty,
		};

		public int TextBlockMinWidth { get; }

		public double FormHeightFromTboxHeight(double tboxHeight) => tboxHeight + 65;
		public double FormWidthFromTboxWidth(double tboxWidth)
		{
			int iconWidth = _icon is MessageBoxIcon.None ? 0 : 42;
			return tboxWidth + 30 + iconWidth;
		}

		public MessageBoxViewModel() { }
		public MessageBoxViewModel(string message, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultBtn)
		{

			Message = message;
			Caption = caption;
			_button = buttons;
			_icon = icon;
			_defaultButton = defaultBtn;

			int numBtns = HasButton3 ? 3 : HasButton2 ? 2 : 1;
			int iconWidth = icon is MessageBoxIcon.None ? 0 : 42;
			int formMinWidth = Math.Max(85 * numBtns + 10, 71 + iconWidth + 20);
			TextBlockMinWidth = formMinWidth - 30 - iconWidth;
		}
	}
}