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

namespace CondoUpdate.ResponsiveLayout.TilaaIlmoitaGlobalNavigationTallier
{
    public class UpdaterImpl : ICondoUpdater
    {
        private const string NewPageTitle = "Tilaa & Ilmoita";
        private const string OldPageTitle = "Tilitoimiston palsta";
        private readonly Guid _webFeatureId = new Guid("2aebd2c9-b135-4681-aa59-de83aea68d1b");
        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 Company '{0}':\n{1}\n{2}", url, x.Message, x.StackTrace);
            }
        }

        private void updateImpl(string url)
        {
            if (string.IsNullOrEmpty(url)) return;
            ChangeAcGlobalNavigation(url);
            ChangeCompanyGlobalNavigation(url);
            EnableTilaaIlmoitaList(url);
        }

        private void ChangeAcGlobalNavigation(string url)
        {
            try
            {
                ChangeGlobalNavigation(url, false);
            }
            catch (Exception x)
            {
                this.error("Error occured when update ac global navigation on {0} error: {1} {2}", url, x.Message, x.StackTrace);
            }
        }

        private void ChangeCompanyGlobalNavigation(string url)
        {
            try
            {
                ChangeGlobalNavigation(url, true);
            }
            catch (Exception x)
            {
                this.error("Error occured when update company global navigation on {0} error: {1} {2}", url, x.Message, x.StackTrace);
            }
        }

        private void ChangeGlobalNavigation(string url, bool isCompany)
        {
            this.warn("=== start tilaa and ilmoita plugin on {1} web: {0}", url, isCompany ? "company" : "ac");
            using (var site = new SPSite(url))
            using (var web = isCompany ? site.OpenWeb() : site.RootWeb)
            {
                try
                {
                    if (web == null || !web.Exists)
                    {
                        this.warn("{1} web does not exist: {0}", url, isCompany ? "company" : "ac");
                        return;
                    }
                    Thread.CurrentThread.CurrentUICulture = new CultureInfo((int)web.Language);
                    var pweb = PublishingWeb.GetPublishingWeb(web);
                    var globalNavigation = pweb.Navigation.GlobalNavigationNodes;

                    var palstaWeb = web.Webs.Cast<SPWeb>().FirstOrDefault(w => w.Title.StartsWith(OldPageTitle));
                    if (palstaWeb != null && palstaWeb.Exists)
                    {
                        this.warn("'{0}' web found", OldPageTitle);
                        var publishingPalstaWeb = PublishingWeb.GetPublishingWeb(palstaWeb);
                        publishingPalstaWeb.IncludeInGlobalNavigation = false;
                        publishingPalstaWeb.Update();
                        this.warn("'{0}' web excluded", OldPageTitle);
                    }
                    else
                    {
                        this.warn("'{0}' web not found", OldPageTitle);
                    }

                    // if it still exists...
                    var palstaNode = globalNavigation.Cast<SPNavigationNode>().FirstOrDefault(n => n.Title.StartsWith(OldPageTitle));
                    if (palstaNode != null)
                    {
                        try
                        {
                            this.warn("trying to delete global navigation node on {1} web: {0}", url, isCompany ? "condo" : "pmc");
                            globalNavigation.Delete(palstaNode);
                            this.warn("no exceptions");
                        }
                        catch (Exception e)
                        {
                            this.warn("got {0} exception with message: {1}", e.ToString(), e.Message);
                        }
                    }

                    var tilaaIlmoitaNode = globalNavigation.Cast<SPNavigationNode>().FirstOrDefault(p => p.Title.Equals(NewPageTitle));
                    if (tilaaIlmoitaNode == null)
                    {
                        this.warn("'{0}' navigation node does not exist, creating new one", NewPageTitle);
                        var node = SPNavigationSiteMapNode.CreateSPNavigationNode(NewPageTitle, SPUrlUtility.CombineUrl(site.RootWeb.Url, "lomakkeet"), NodeTypes.Heading, globalNavigation);
                        var dt = DateTime.Now;
                        node.Properties["CreatedDate"] = dt;
                        node.Properties["LastModifiedDate"] = dt;
                        node.Properties["Description"] = "";
                        node.Properties["Target"] = "";
                        node.Properties["Taloyhtio"] = "1";
                        node.Update();
                        node.MoveToLast(globalNavigation);
                    }
                    else
                    {
                        this.warn("'{0}' navigation node already exists", NewPageTitle);
                    }
                }
                catch (Exception x)
                {
                    this.error("Error occured while working with lomakkeet: {0} {1}", x.Message, x.StackTrace);
                }
            }
            this.warn("=== end tilaa and ilmoita plugin on {1} web: {0}\n\n", url, isCompany ? "condo" : "pmc");
        }

        private void EnableTilaaIlmoitaList(string url)
        {
            try
            {
                using (var site = new SPSite(url))
                {

                    using (var web = site.RootWeb)
                    {
                        if (!web.Exists)
                        {
                            this.warn("Web site '{0}' doesn't exist. It will be ignored", url);
                            return;
                        }
                        Thread.CurrentThread.CurrentUICulture = new CultureInfo((int)web.Language);
                        if (!web.Features.Any(f => f.DefinitionId.Equals(_webFeatureId)))
                        {
                            web.Features.Add(_webFeatureId, true);
                        }
                        else
                        {
                            this.warn("Feature already activated on PMC '{0}', ignore", url);
                        }

                    }
                }
            }
            catch (Exception ex)
            {
                this.error("Error occured when enable Tilaa & Ilmoita list on {0} error: {1} {2}", url, ex.Message,
                   ex.StackTrace);
            }
        }

        #region notify
        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
    }
}