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;
using Microsoft.SharePoint.Utilities;

namespace CondoUpdate.ResponsiveLayout.AddPelsuPage
{
    public class UpdaterImpl : ICondoUpdater
    {
        private const string PAGE_URL = "pelsu.aspx";
        private const string PAGE_FILENAME = "Pelastussuunnitelma.aspx";
        private const string PAGE_TITLE = "Pelastussuunnitelma";
        private const string LIST_TITLE = "Lisäpalvelut";
        private const string FIELD_URL = "Url";
        private readonly Guid WEB_FEATURE_ID = new Guid("3cc89ee5-ef67-418d-a656-7c3c6925714f");

        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 web = site.OpenWeb())
                    {
                        if (!web.Exists)
                        {
                            return;
                        }

                        if (!PublishingWeb.IsPublishingWeb(web))
                        {
                            return;
                        }
                        
                        var pweb = PublishingWeb.GetPublishingWeb(web);
                        Thread.CurrentThread.CurrentUICulture = new CultureInfo((int)web.Language);

                        #region old (before mantis #1030)
                        //var pages = SPUtility.GetLocalizedString("$Resources:List_Pages_UrlName", "cmscore", web.RegionalSettings.LocaleId);
                        //var pageExists = web.GetFolder(pages).Files.Cast<SPFile>().Any(f => string.Compare(f.Name, PAGE_URL, true) == 0);
                        //if (pageExists)
                        //{
                        //    this.info("found publishing page '{0}' on condo site '{1}'.", PAGE_URL, url);
                        //    var globalNavigation = pweb.Navigation.GlobalNavigationNodes;
                        //    var node = globalNavigation.Cast<SPNavigationNode>().FirstOrDefault(n => string.Compare(n.Title, PAGE_TITLE, true) == 0);
                        //    if (node != null)
                        //    {
                        //        this.info(string.Format("delete '{0}' menu item on site '{1}", PAGE_TITLE, url));
                        //        globalNavigation.Delete(node);
                        //    }
                        //}
                        //else
                        //{
                        //    web.Features.Add(WEB_FEATURE_ID, true);
                        //}

                        //var list = web.Lists.Cast<SPList>().FirstOrDefault(l => l.Title.Equals(LIST_TITLE));
                        //if (list == null)
                        //{
                        //    this.error("list '{0}' does not exist on site '{1}'.", LIST_TITLE, web.Url);
                        //    return;
                        //}

                        //if (list.Items.Cast<SPListItem>().Any(i => string.Compare(i.Title, PAGE_TITLE, true) == 0))
                        //{
                        //    this.warn("lisapalvelut already contains '{0}' on site '{1}'", PAGE_TITLE, url);
                        //    return;
                        //}

                        //var item = list.Items.Add();
                        //item[SPBuiltInFieldId.Title] = PAGE_TITLE;
                        //item[FIELD_URL] = string.Format("{0}/{1}/{2}", web.ServerRelativeUrl, pages, PAGE_URL);
                        //item.Update();
                        //list.Update();
                        #endregion

                        var page = pweb.GetPublishingPages().FirstOrDefault(p => string.Compare(p.Name, PAGE_FILENAME, true) == 0);
                        if (page != null)
                        {
                            this.info("found publishing page '{0}' on condo site '{1}'.", PAGE_FILENAME, url);
                            page.IncludeInGlobalNavigation = false;
                            page.IncludeInCurrentNavigation = false;
                        }


                        var globalNavigation = pweb.Navigation.GlobalNavigationNodes;
                        //this.info("=== listing nodes start ===");
                        //globalNavigation.Cast<SPNavigationNode>().ToList().ForEach(n => { this.info("name '{0}', url '{1}'", n.Title, n.Url); });
                        var node = globalNavigation.Cast<SPNavigationNode>().FirstOrDefault(n => string.Compare(n.Title, PAGE_TITLE, true) == 0);
                        if (node != null)
                        {
                            this.info(string.Format("found '{0}' menu item on site '{1}", PAGE_TITLE, url));
                            string pageUrl = node.Url;

                            var list = web.Lists.Cast<SPList>().FirstOrDefault(l => l.Title.Equals(LIST_TITLE));
                            if (list == null)
                            {
                                this.error("list '{0}' does not exist on site '{1}'.", LIST_TITLE, web.Url);
                                return;
                            }

                            try
                            {
                                //globalNavigation.Delete(node);
                                node.Delete();
                                this.info("deleted node");
                            }
                            catch (Exception e)
                            {
                                this.warn("unable to delete node: {0}", e.Message);
                            }

                            if (list.Items.Cast<SPListItem>().Any(i => string.Compare(i.Title, PAGE_TITLE, true) == 0))
                            {
                                this.warn("lisapalvelut already contains '{0}' on site '{1}'", PAGE_TITLE, url);
                                return;
                            }

                            var item = list.Items.Add();
                            item[SPBuiltInFieldId.Title] = PAGE_TITLE;
                            item[FIELD_URL] = pageUrl;
                            item.Update();
                            list.Update();
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                this.error("Error occured when update '{0}' site:\n{1}\n{2}", url, ex.Message,
                    ex.StackTrace);
            }
        }

        #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
    }
}