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

namespace CondoUpdate.ResponsiveLayout.RemoveEmailAlertPages
{
    class UpdaterImpl : ICondoUpdater
    {
        private const string menuText = "Tilaa sähköpostihälytys";
        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.info("Opening Condo '{0}'...", url);
            using (var site = new SPSite(url))
            {
                using (var condoWeb = site.OpenWeb())
                {
                    Thread.CurrentThread.CurrentUICulture = new CultureInfo((int)condoWeb.Language);
                    if (!condoWeb.Exists || string.Compare(condoWeb.Url, url, true) != 0)
                    {
                        this.warn("Condo site '{0}' doesn't exist. It will be ignored", url);
                        return;
                    }

                    if (!PublishingWeb.IsPublishingWeb(condoWeb))
                    {
                        this.warn("Condo site '{0}' is not publishing web. It will be ignored", url);
                        return;
                    }

                    var pweb = PublishingWeb.GetPublishingWeb(condoWeb);
                    this.info("Condo '{0}' was sucessfully opened", url);

#if USE_NAV
                    var globalNav = pweb.Navigation.GlobalNavigationNodes;
                    globalNav.Cast<SPNavigationNode>().Where(n => string.Compare(menuText, n.Title, true) == 0).ToList().ForEach((node) =>
                    {
                        var pageUrl = node.Url;
                        this.info("Got page '{0}'", pageUrl);
                        var subWeb = pweb.GetPublishingWebs().Cast<PublishingWeb>().FirstOrDefault(w => string.Compare(pageUrl, w.Web.ServerRelativeUrl, true) == 0);
                        if (subWeb != null)
                        {
                            this.info("Deleting subsite '{0}'", subWeb.Title);
                            subWeb.Delete();
                        }
                    });
#else
                    //pweb.GetPublishingWebs().Cast<PublishingWeb>().Where(w => string.Compare(menuText, w.Title, true) == 0).ToList().ForEach((subWeb) =>
                    pweb.GetPublishingWebs().Cast<PublishingWeb>().Where(w => w.Title.StartsWith(menuText)).ToList().ForEach((subWeb) =>
                    {
                        this.info("Deleting subsite '{0}' with url: {1}", subWeb.Title, subWeb.Web.ServerRelativeUrl);
                        subWeb.Delete();
                    });
#endif
                    pweb.Update();
                }
            }
        }

        #region notifier
        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
    }
}