using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Drawing;
using System.ComponentModel;
using System.Security.Cryptography;
using System.Net;
using TradeIdeas.XML;

namespace TradeIdeas.TIProGUI
{
    /// <summary>
    /// This class is for handling Company Logos.
    /// </summary>
    public static class CompanyLogoManager
    {
        private static string _companyLogosWebResource = "https://static.trade-ideas.com/CompanyLogos/";

        /// <summary>
        /// Loads image of the company's logo
        /// </summary>
        public static void LoadCompanyLogo(PictureBox pictureBox, string symbol)
        {
            _companyLogosWebResource = GuiEnvironment.GlobalSettings.Node("SINGLE_STOCK_WINDOW").Node("SINGLE_STOCK_WINDOW_COMPANYLOGOS").Property("SOURCE", _companyLogosWebResource);
            var imageUrl = $"{_companyLogosWebResource}{WebUtility.UrlEncode(symbol)}.png";
            pictureBox.Image = null;
            pictureBox.LoadAsync(@imageUrl);
        }

        /// <summary>
        /// Create a color from the symbol.
        /// </summary>
        /// <param name="symbol"></param>
        /// <returns></returns>
        public static Color ColorFromSymbol(string symbol)
        {
            var md5 = MD5.Create();
            var hash = md5.ComputeHash(Encoding.UTF8.GetBytes(symbol));
            return Color.FromArgb(hash[0], hash[1], hash[2]);
        }

        /// <summary>
        /// Symbol PictureBox control LoadCompleted event handler.
        /// This event handler will make the control a solid color based on the symbol if a logo isn't found.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        public static void symbolPictureBox_LoadCompleted(object sender, AsyncCompletedEventArgs e)
        {
            PictureBox pictureBox = sender as PictureBox;
            if (pictureBox != null)
            {
                if (e.Error != null || e.Cancelled)
                    pictureBox.Image = null;

                if (null != pictureBox.Image)
                {
                    // Resize image to fit PictureBox.
                    pictureBox.Image = CollaborateForm.resizeImage((Image)pictureBox.Image.Clone(), new Size(pictureBox.Width, pictureBox.Height));
                }
                else
                {
                    // Symbol image was not found, so use a solid color instead.
                    pictureBox.BackColor = CompanyLogoManager.ColorFromSymbol(pictureBox.Tag.ToString());
                }
                // Make logo image visible.
                pictureBox.Visible = true;
            }
        }

    }
}