using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Windows.Forms.VisualStyles;
using CreateVisualComponent.Exceptions;

namespace CreateVisualComponent
{
    public partial class InputComponent : UserControl
    {
        public EventHandler? _changeEvent;
        public EventHandler? _checkBoxEvent;

        public InputComponent()
        {
            InitializeComponent();
        }
        public DateTime? Value
        {
            get
            {
                if (checkBoxDate.Checked)
                {
                    return null;
                }
                if (string.IsNullOrEmpty(textBoxDate.Text))
                {
                    throw new NotFilledException("The textbox is empty, fill it in or click on the checkbox!");
                }
                if (DateTime.TryParseExact(textBoxDate.Text, "dd/MM/yyyy", null, DateTimeStyles.None, out DateTime parsedDate))
                {
                    return parsedDate;
                }
                throw new IncorrectFillingException(textBoxDate.Text + " incorrect date!");
                
            }
            set
            {
                checkBoxDate.Checked = value is null;
                textBoxDate.Text = value?.ToString("dd/MM/yyyy") ?? string.Empty;
            }
        }

        public event EventHandler CheckBoxEvent
        {
            add { _changeEvent += value; }
            remove { _changeEvent -= value; }
        }

        private void TextBoxDate_TextChanged(object sender, EventArgs e)
        {
            _changeEvent?.Invoke(sender, e);
        }

        private void CheckBoxDate_CheckedChanged(object sender, EventArgs e)
        {
            textBoxDate.Enabled = !checkBoxDate.Checked;
            _changeEvent?.Invoke(sender, e);
        }
    }
}