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

namespace CondoUpdate.RenameTaloyhtioToOsuriaInGlobalNav
{
    public class UpdaterImpl : ICondoUpdater
    {
        // private const string TargetPageUrl = "johdonsalkku.aspx";
        // private const string TargetTitle = "Taloyhtio.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 pmcWeb = site.RootWeb)
                    {
                        if (!pmcWeb.Exists)
                        {
                            return;
                        }

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

        private void renameGlobalNavNode(PublishingWeb pweb, SPWeb pmcWeb)
        {
            try
            {
                var globalNavigation = pweb.Navigation.GlobalNavigationNodes;
                var node = globalNavigation.Cast<SPNavigationNode>().FirstOrDefault(spnode => string.Compare(spnode.Title, "Taloyhtio.Info", true) == 0);
                if (node == null)
                {
                    return;
                }

                node.Title = "Osuria";
                node.Update();
            }
            catch (Exception ex)
            {
                this.error("Error occured when change global menu item to the '{0}' site:\n{1}\n{2}", pweb.Web.Url, ex.Message, ex.StackTrace);
            }
        }

        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 });
            }
        }
    }
}