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

namespace CondoUpdate.ResponsiveLayout.RemoveAkatemiaLink
{
    public class UpdaterImpl : ICondoUpdater
    {
        private const string TITLE = "Taloyhtio.Info Akatemia";

        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)
        {
            using (var site = new SPSite(url))
            {
                using (var condoWeb = site.OpenWeb())
                {
                    if (!condoWeb.Exists || string.Compare(condoWeb.Url, url, true) != 0)
                    {
                        this.warn("Site '{0}' doesn't exist. It will be ignored", url);
                        return;
                    }
                    Thread.CurrentThread.CurrentUICulture = new CultureInfo((int)condoWeb.Language);

                    processWeb(condoWeb);
                    foreach (SPWeb subWeb in condoWeb.Webs)
                    {
                        processWeb(subWeb);
                    }
                }
            }
        }

        private void processWeb(SPWeb web)
        {
            if (!PublishingWeb.IsPublishingWeb(web))
            {
                this.warn("Site '{0}' is not publishing web. It will be ignored", web.Url);
                return;
            }

            var pweb = PublishingWeb.GetPublishingWeb(web);
            var globalNavigation = pweb.Navigation.GlobalNavigationNodes;
            var node = globalNavigation.Cast<SPNavigationNode>().FirstOrDefault(n => string.Compare(TITLE, n.Title, true) == 0);
            if (node != null)
            {
                globalNavigation.Delete(node);
            }
        }

        #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
    }
}