using Microsoft.SharePoint;
using Microsoft.SharePoint.Navigation;
using Microsoft.SharePoint.Publishing;
using Microsoft.SharePoint.Publishing.Navigation;
using System;
using System.Globalization;
using System.Linq;
using System.Threading;
using Taloyhtio.CondoUpdate.Common;

namespace CondoUpdate.ResponsiveLayout.AddJohdonSalkkuGlobalMenuItemTallier
{
    public class UpdaterImpl : ICondoUpdater
    {
        private const string TargetPageUrl = "johdonsalkku.aspx";
        private const string TargetTitle = "Tallier.Info";
        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)
        {
            try
            {
                using (var site = new SPSite(url))
                {
                    using (var acWeb = site.RootWeb)
                    {
                        if (!acWeb.Exists)
                        {
                            return;
                        }

                        if (!PublishingWeb.IsPublishingWeb(acWeb))
                        {
                            return;
                        }
                        var pweb = PublishingWeb.GetPublishingWeb(acWeb);
                        Thread.CurrentThread.CurrentUICulture = new CultureInfo((int)acWeb.Language);
                        addGlobalNavNode(pweb, acWeb);
                    }
                }
            }
            catch (Exception ex)
            {
                this.error("Error occured when update '{0}' site:\n{1}\n{2}", url, ex.Message,
                    ex.StackTrace);
            }
        }

        private void addGlobalNavNode(PublishingWeb pweb, SPWeb acWeb)
        {
            try
            {
                var globalNavigation = pweb.Navigation.GlobalNavigationNodes;
                bool alreadyExists = globalNavigation.Cast<SPNavigationNode>().Any(spnode => spnode.Title.Equals(TargetTitle));
                if (alreadyExists)
                {
                    this.warn(string.Format("{0} menu item already exists. Site won't be updated", TargetTitle));
                    return;
                }
                var pageExists = acWeb.GetFolder((int)acWeb.Language == 1035 ? "Sivut" : "Pages").Files.Cast<SPFile>().Any(f => f.Name.ToLower() == TargetPageUrl);
                if (!pageExists)
                {
                    this.error("Unable to find guide pages. Site won't be updated");
                    return;
                }
                var file = acWeb.GetFolder((int)acWeb.Language == 1035 ? "Sivut" : "Pages").Files.Cast<SPFile>().First(f => f.Name.ToLower() == TargetPageUrl);
                var node = SPNavigationSiteMapNode.CreateSPNavigationNode(TargetTitle, file == null ? acWeb.ServerRelativeUrl : file.Url, NodeTypes.AuthoredLinkPlain, globalNavigation);

                var dt = DateTime.Now;
                node.Properties["CreatedDate"] = dt;
                node.Properties["LastModifiedDate"] = dt;
                node.Properties["Description"] = "";
                node.Update();
                node.MoveToLast(globalNavigation);
            }
            catch (Exception ex)
            {
                this.error("Error occured when add global menu item to the '{0}' site:\n{1}\n{2}", pweb.Web.Url, ex.Message, ex.StackTrace);
            }
        }

        #region notify
        private void info(string msg, params object[] args)
        {
            this.notify(LogLevel.Info, msg, args);
        }

        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 });
            }
        }
        #endregion
    }
}