using System;
using System.Drawing;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Threading;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Utilities;
using Taloyhtio.CondoUpdate.Common;

namespace CondoUpdate.ResponsiveLayout.SendDevelopmentIdeaPmc
{
    public class UpdaterImpl:ICondoUpdater
    {
        private const string PUBLISHING_IMAGES_URL = "/publishingimages/";
        private const string PUBLISHING_IMAGES_FOLDER = "etusivukuvat";
        public event EventHandler<LogEventArgs> OnNotify;
        public void Update(object args)
        {
            string url = args as string;

            if (string.IsNullOrEmpty(url))
            {
                this.warn("Url is empty");
                return;
            }
            
            try
            {
                this.updateImpl(url);
            }
            catch (Exception x)
            {
                this.error("Error occured during updating of Condo '{0}':\n{1}\n{2}", url, x.Message, x.StackTrace);
            }
        }

        private void updateImpl(string url)
        {
            this.sendDevelopmentIdea(url);
        }

        private void sendDevelopmentIdea(string url)
        {
            try
            {
                using (var site = new SPSite(url))
                {
                   
                    using (var web = site.OpenWeb())
                    {
                        if (!web.Exists)
                        {
                            this.warn("Web site '{0}' doesn't exist. It will be ignored", url);
                            return;
                        }

                        Thread.CurrentThread.CurrentUICulture = new CultureInfo((int)web.Language);

                        var isCustom = WebPropertyHelper.Get(web, Constants.PropertyBag.KEY_CUSTOM_BACKGROUND_USE_CUSTOM) as string;
                        if (isCustom != null)
                        {
                            return;
                        }

                        var list = web.Lists.Cast<SPList>().FirstOrDefault(l => l.DefaultViewUrl.ToLower().Contains(PUBLISHING_IMAGES_URL));
                        if (list == null)
                        {
                            return;
                        }

                        var folder = list.RootFolder.SubFolders.Cast<SPFolder>().FirstOrDefault(f => string.Compare(f.Name, PUBLISHING_IMAGES_FOLDER, true) == 0);
                        if (folder == null || !folder.Exists)
                        {
                            return;
                        }

                        string imageUrl = string.Empty;
                        foreach (SPFile file in folder.Files)
                        {
                            using (var fs = file.OpenBinaryStream())
                            {
                                using (var image = Image.FromStream(fs))
                                {
                                    if (image.Width >= 1500)
                                    {
                                        //imageUrl = SPUrlUtility.CombineUrl(web.Url, file.Url);
                                        imageUrl = file.ServerRelativeUrl;
                                        break;
                                    }
                                }
                            }
                        }

                        if (string.IsNullOrEmpty(imageUrl))
                        {
                            return;
                        }

                        WebPropertyHelper.Set(web, Constants.PropertyBag.KEY_CUSTOM_BACKGROUND_USE_CUSTOM, "true");
                        WebPropertyHelper.Set(web, Constants.PropertyBag.KEY_CUSTOM_BACKGROUND_URL, imageUrl);
                    }
                }
            }
            catch (Exception ex)
            {

            }
        }

        private void warn(string msg, params object[] args)
        {
            this.notify(LogLevel.Warn, msg, args);
        }

        private void error(string msg, params object[] args)
        {
            this.notify(LogLevel.Error, msg, args);
        }

        private void notify(LogLevel level, string msg, params object[] args)
        {
            this.notify(level, string.Format(msg, args));
        }

        private void notify(LogLevel level, string msg)
        {
            if (this.OnNotify != null)
            {
                this.OnNotify(this, new LogEventArgs { LogLevel = level, Message = msg });
            }
        }
    }

    public static class WebPropertyHelper
    {
        public static void Set(SPWeb web, string propertyName, string propertyValue)
        {
            web.AllProperties[propertyName] = propertyValue;
            web.Update();
        }

        public static object Get(SPWeb web, string propertyName)
        {
            if (web.AllProperties.ContainsKey(propertyName))
            {
                return web.AllProperties[propertyName];
            }
            return null;
        }

        // Remove doesn't work on Properties - only on AllProperties
        //        public static void Remove(SPWeb site, string propertyName)
        //        {
        //            if (!site.Properties.ContainsKey(propertyName))
        //            {
        //                return;
        //            }
        //            site.Properties.Remove(propertyName);
        //        }
    }

    public static class Constants
    {
        public static class PropertyBag
        {
            public const string KEY_CONDO_POST_CONFIGURED = "PostConfigured";
            public const string KEY_CONDO_SHORT_NAME = "CondoShortName";
            public const string KEY_CUSTOM_BACKGROUND_USE_CUSTOM = "CondoAutomation_CustomBackground_UseCustom";
            public const string KEY_CUSTOM_BACKGROUND_URL = "CondoAutomation_CustomBackground_Url";
            public const string CONDO_VERSION = "CondoVersion";
        }
    }
}