using System;
using System.Drawing;
using System.Windows.Forms;
using TBF.UiBridge;

namespace TBF.UI.Shared
{
    public partial class ModelessActivityForm : Form
    {
        /// <summary>
        /// Called from the state machine when an operation forces a modeless dialog close.
        /// </summary>
        public void CloseForm(object sender, EventArgs args)
        {
            if (CloseFormHandler == null) return;
            try { CloseFormHandler(sender, null); }
            catch (Exception) { }
        }
        public event EventHandler<EventArgs> CloseFormHandler;


        public string Title;
        public string Message;
        public Color BackgroundColor;
        public Color TextColor;
        public Font TextFont;
        public string FontFamily;
        public int FontSize;
        public FontStyle FontStyle;
        public bool StartActivityHandler;


        /// <summary>
        /// Constructor to be used by the application
        /// </summary>
        /// <param name="title">Window title</param>
        /// <param name="message">Displayed message</param>
        public ModelessActivityForm()
        {
            InitializeComponent();

            this.Icon = Properties.Resources.TBF_icon;

            ControlBox = false;

            CloseFormHandler += HandleCloseFormCommand;
        }

        private void ModelessActivityForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            CloseFormHandler -= HandleCloseFormCommand;
        }

        void HandleCloseFormCommand(object sender, EventArgs args)
        {
            if (InvokeRequired)
            {
                Invoke(new EventHandler<EventArgs>(OnCloseForm), sender, args);
            }
            else
            {
                OnCloseForm(sender, args);
            }
        }

        void OnCloseForm(object sender, EventArgs args)
        {
            DialogResult = DialogResult.Cancel;
            Close();
        }

        private void ModelessForm_Load(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(Title)) Text = Title;
            if (!string.IsNullOrEmpty(Message)) label1.Text = Message;
            if (BackgroundColor != null) BackColor = BackgroundColor;
            if (TextColor != null) ForeColor = TextColor;
			if (!string.IsNullOrEmpty(FontFamily))
			{
				label1.Font = new Font(FontFamily, FontSize, FontStyle);
				activityStatusLabel.Font = new Font(FontFamily, FontSize, FontStyle);
			}

            float textWidth = Graphics.FromImage(new Bitmap(1, 1)).MeasureString(label1.Text, label1.Font).Width;
            float textHeight = Graphics.FromImage(new Bitmap(1, 1)).MeasureString(label1.Text, label1.Font).Height;
            Width = (int)textWidth + 120;		/// Form width calculated from the text width

            if (StartActivityHandler)
            {
                Height += (int)textHeight;		    /// Form height calculated from the text width

                Bridge.ActivityHandler += delegate(object sndr, ActivityEventArgs args)
                    {
                        if (InvokeRequired) { Invoke(new EventHandler<ActivityEventArgs>(OnActivity), sndr, args); }
                        else OnActivity(sndr, args);
                    };
            }
		}

		void OnActivity(object sender, ActivityEventArgs args)
		{
			activityStatusLabel.Text = args.Activity;
		}
    }
}