namespace COP
{
    public partial class UserDateTimePicker : UserControl
    {
        private DateTime? minValue;
        private DateTime? maxValue;

        public event EventHandler? _valueChanged;
        private event Action? _errorOccured;
        public string Error { get; private set; }

        public UserDateTimePicker()
        {
            InitializeComponent();
            Error = string.Empty;
        }

        public DateTime? MinValue
        {
            get { return minValue; }
            set { minValue = value; }
        }

        public DateTime? MaxValue
        {
            get { return maxValue; }
            set { maxValue = value; }
        }

        public DateTime? SelectedValue
        {
            get
            {
                if (!minValue.HasValue || !maxValue.HasValue)
                {
                    Error = "Range is not set.";
                    _errorOccured?.Invoke();
                    return null;
                }
                else if (dateTimePicker.Value < minValue ||
                         dateTimePicker.Value > maxValue)
                {
                    Error = "Selected value is out of range.";
                    _errorOccured?.Invoke();
                    return null;
                }

                return dateTimePicker.Value;
            }
            set
            {
                if (!value.HasValue)
                {
                    Error = "Value is null.";
                    _errorOccured?.Invoke();
                    return;
                }
                if (!minValue.HasValue || !maxValue.HasValue)
                {
                    Error = "Range is not set.";
                    _errorOccured?.Invoke();
                    return;
                }
                if (value < minValue || value > maxValue)
                {
                    Error = "Selected value is out of range.";
                    _errorOccured?.Invoke();
                    return;
                }

                dateTimePicker.Value = value.Value;

            }
        }

        public event EventHandler ValueChanged
        {
            add { _valueChanged += value; }
            remove { _valueChanged -= value; }
        }
        public event Action AnErrorOccurred
        {
            add { _errorOccured += value; }
            remove { _errorOccured -= value; }
        }

        private void DateTimePicker_ValueChanged(object sender, EventArgs e)
        {
            try
            {
                _valueChanged?.Invoke(this, e);
            }
            catch (Exception ex)
            {
                Error = ex.Message;
                _errorOccured?.Invoke();
            }
        }
    }
}