/*
 * ScrollingMessageBox.cs
 * 
 * Copyright © 2010
 * Diversified Technical Systems, Inc.
 * All Rights Reserved
 */

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace DTS.Common.Utilities
{
    /// <summary>
    /// Crude form for displaying modal yes/no dialog queries.
    /// </summary>
    public partial class ScrollingMessageBox : Form
    {
        public int TimeWait { get; set; } = 0;

        public ScrollBars ScrollBarStyle
        {
            get => messageTextBox.ScrollBars;
            set => messageTextBox.ScrollBars = value;
        }
        public void SetButtonFocus(DialogResult res)
        {
            var maxIndex = System.Math.Max(YesButton.TabIndex, NoButton.TabIndex);
            var minIndex = System.Math.Min(YesButton.TabIndex, NoButton.TabIndex);

            switch (res)
            {
                case DialogResult.No:
                    AcceptButton = NoButton;
                    NoButton.TabIndex = minIndex;
                    YesButton.TabIndex = maxIndex;
                    break;
                case DialogResult.Yes:
                default:
                    AcceptButton = YesButton;
                    YesButton.TabIndex = minIndex;
                    NoButton.TabIndex = maxIndex;
                    break;

            }
        }
        public bool ShowYesNo
        {
            get => YesButton.Visible && NoButton.Visible;
            set
            {
                YesButton.Visible = value;
                NoButton.Visible = value;
            }
        }
        public Size FormSize
        {
            get => Size;
            set
            {
                if (value == Size) { return; }
                //Size oldSize = Size;
                Size = value;
                //FormResize(oldSize, Size);
            }
        }
        public bool ShowClose
        {
            get => btnClose.Visible;
            set => btnClose.Visible = value;
        }
        /// <summary>
        /// Initialize an instance of the <see cref="ScrollingMessageBox"/> class.
        /// </summary>
        /// 
        /// <param name="message">
        /// The message <see cref="string"/> to be displayed in the dialog's scroll-enabled
        /// text field.  Note that it does not recognize "\n" as newline; rather use
        /// Environmenet.Newline.
        /// </param>
        /// 
        /// <param name="caption">
        /// The caption <see cref="string"/> for the dialog.
        /// </param>
        /// 
        public ScrollingMessageBox(string message, string caption)
        {
            try
            {
                SuspendLayout();
                InitializeComponent();
                ResumeLayout();

                Text = caption;
                messageTextBox.Text = message;
                messageTextBox.Select(0, 0);
                //this.YesButton.Focus( );
                KeyPreview = true;
                KeyDown += new KeyEventHandler(ScrollingMessageBox_KeyDown);


            }

            catch (Exception ex)
            {
                throw new ApplicationException("encountered problem constructing " + GetType().FullName, ex);
            }
        }

        /// <summary>
        /// Initialize an instance of the <see cref="ScrollingMessageBox"/> class.
        /// </summary>
        /// 
        /// <param name="message">
        /// The message <see cref="string"/> to be displayed in the dialog's scroll-enabled
        /// text field.  Note that it does not recognize "\n" as newline; rather use
        /// Environmenet.Newline.
        /// </param>
        /// 
        /// <param name="caption">
        /// The caption <see cref="string"/> for the dialog.
        /// </param>
        /// <param name="ico">icon</param> for the dialog
        /// 
        public ScrollingMessageBox(string message, string caption, Icon ico)
        {
            try
            {
                SuspendLayout();
                InitializeComponent();
                ResumeLayout();

                Text = caption;
                messageTextBox.Text = message;
                messageTextBox.Select(0, 0);
                //this.YesButton.Focus();
                KeyPreview = true;
                KeyDown += new KeyEventHandler(ScrollingMessageBox_KeyDown);
                Icon = ico;
                //this.ResizeBegin += new EventHandler(ScrollingMessageBox_ResizeBegin);
                //this.ResizeEnd += new EventHandler(ScrollingMessageBox_ResizeEnd);
            }

            catch (Exception ex)
            {
                throw new ApplicationException("encountered problem constructing " + GetType().FullName, ex);
            }
        }
        /*
        private Size beforeSize = Size.Empty;
        void ScrollingMessageBox_ResizeBegin(object sender, EventArgs e)
        {
            beforeSize = Size;
        }

        void ScrollingMessageBox_ResizeEnd(object sender, EventArgs e)
        {
            Size afterSize = Size;
            FormResize(beforeSize, afterSize);
        }
        private void FormResize(Size before, Size after)
        {
            int xChange = after.Width - before.Width;
            int yChange = after.Height - before.Height;
            Size newSize = messageTextBox.Size;
            newSize.Height += yChange;
            newSize.Width += xChange;
            messageTextBox.Size = newSize;
            //if (btnClose.Visible)
            //{
            Point loc = btnClose.Location;
            loc.Y += yChange;
            loc.X = ((after.Width - btnClose.Width) / 2);
            btnClose.Location = loc;
            //}
            //else
            //{
            loc = YesButton.Location;
            loc.X += xChange / 2;
            loc.Y += yChange;
            YesButton.Location = loc;
            loc = NoButton.Location;
            loc.X += xChange / 2;
            loc.Y += yChange;
            NoButton.Location = loc;
            //}
            NoButton.Focus();
        }*/
        /// <summary>
        /// handle the key down for yes and no
        /// note - this isn't i18N'd, so the keycodes might need to change whenever we do change this
        /// from just "yes", "no"
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void ScrollingMessageBox_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Y)
            {
                YesButtonClick();
                e.Handled = true;
                return;
            }
            else if (e.KeyCode == Keys.N)
            {
                NoButtonClick();
                e.Handled = true;
                return;
            }
            e.Handled = false;
        }

        /// <summary>
        /// Handler for YesButton click events.
        /// </summary>
        /// 
        /// <param name="sender">
        /// The <see cref="object"/> responsible for generating this event.
        /// </param>
        /// 
        /// <param name="e">
        /// The <see cref="EventArgs"/> for this event.
        /// </param>
        /// 
        private void YesButton_Click(object sender, EventArgs e)
        {
            YesButtonClick();
        }

        /// <summary>
        /// Handler for NoButton click events.
        /// </summary>
        /// 
        /// <param name="sender">
        /// The <see cref="object"/> responsible for generating this event.
        /// </param>
        /// 
        /// <param name="e">
        /// The <see cref="EventArgs"/> for this event.
        /// </param>
        /// 
        private void NoButton_Click(object sender, EventArgs e)
        {
            NoButtonClick();
        }
        /// <summary>
        /// do yes
        /// </summary>
        private void YesButtonClick()
        {
            DialogResult = DialogResult.Yes;
            Close();
        }
        /// <summary>
        /// do no
        /// </summary>
        private void NoButtonClick()
        {
            DialogResult = DialogResult.No;
            Close();
        }


        private void TimerTick(object sender, EventArgs e)
        {
            BeginInvoke(new MethodInvoker(delegate ()
                {
                    btnClose.Enabled = true;
                    YesButton.Enabled = true;
                    NoButton.Enabled = true;
                }
            ));
        }

        public new DialogResult ShowDialog()
        {
            CheckTimer();
            return base.ShowDialog();
        }
        public new DialogResult ShowDialog(IWin32Window owner)
        {
            if (InvokeRequired)
            {
                return (DialogResult)Invoke(new Func<IWin32Window, DialogResult>((DialogResult) => ShowDialog(owner)));
            }
            else
            {
                CheckTimer();
                return base.ShowDialog(owner);
            }
        }

        private void CheckTimer()
        {
            if (TimeWait > 0)
            {
                _TimeDelay.Interval = TimeWait;
                _TimeDelay.Start();
                btnClose.Enabled = false;
                YesButton.Enabled = false;
                NoButton.Enabled = false;
            }
        }
    }
}