using System;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading;
using System.Web.UI.WebControls.WebParts;
using System.Xml;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Publishing;
using Microsoft.SharePoint.Utilities;
using Microsoft.SharePoint.WebPartPages;
using Taloyhtio.CondoUpdate.Common;
using WebPart = System.Web.UI.WebControls.WebParts.WebPart;

namespace CondoUpdate.CentralizedNewsForOwnersOrderWebParts
{
    public class UpdaterImpl : ICondoUpdater
    {
        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(SPUrlUtility.CombineUrl(url, "Osakkaille"));
            }
            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 web = site.OpenWeb())
                {
                    if (!web.Exists)
                    {
                        return;
                    }

                    Thread.CurrentThread.CurrentUICulture = new CultureInfo((int)web.Language);

                    if (!PublishingWeb.IsPublishingWeb(web))
                    {
                        return;
                    }
                    var psite = new PublishingSite(site);
                    var pweb = PublishingWeb.GetPublishingWeb(web);

                    var list = pweb.PagesList;
                    foreach (SPListItem item in list.Items)
                    {
                        string fileUrl = item.File.Url.ToLower();
                        if (fileUrl.EndsWith("/default.aspx"))
                        {
                            this.moveWebParts(pweb, item.File);
                        }
                    }
                }
            }
        }

        private void moveWebParts(PublishingWeb pweb, SPFile file)
        {
            SPLimitedWebPartManager webPartManager = null;
            try
            {
                //this.info("Get start page");
                if (file.CheckOutStatus == SPFile.SPCheckOutStatus.None)
                {
                    //this.info("Checkout start page");
                    file.CheckOut();
                }
                else
                {
                    // if file was checked out by another user, need undo check out and check in again in order to avoid errors
                    // when add web part
                    //this.info("Start page is already checked out. Undo previous check out and check out it again");
                    file.UndoCheckOut();
                    file.CheckOut();
                }

                //this.info("Get web part manager");
                webPartManager = file.GetLimitedWebPartManager(PersonalizationScope.Shared);
                if (webPartManager == null)
                {
                    this.error("Web part manager is null. Site won't be updated");
                    file.UndoCheckOut();
                    return;
                }

                //this.info("Search for DataFormWebPart with title '{0}' on the start page", webPartTitle);
                WebPart osakastiedotteetWebPart = null;
                WebPart tiedostotWebPart = null;
                WebPart osakkailleWebPart = null;
                var webParts = webPartManager.WebParts;
                if (webParts != null)
                {
                    foreach (WebPart wp in webParts)
                    {
                        if (wp.Title == "Osakastiedotteet")
                        {
                            osakastiedotteetWebPart = wp;
                        }
                        else if (wp.Title == "Tiedostot")
                        {
                            tiedostotWebPart = wp;
                        }
                        else if (wp.Title == "Isännöitsijältä osakkaille")
                        {
                            osakkailleWebPart = wp;
                        }
                    }
                }

                if (osakastiedotteetWebPart != null)
                {
                    webPartManager.MoveWebPart(osakastiedotteetWebPart, "LeftColumnZone", 0);
                    webPartManager.SaveChanges(osakastiedotteetWebPart);
                }
                if (tiedostotWebPart != null)
                {
                    webPartManager.MoveWebPart(tiedostotWebPart, "RightColumnZone", 0);
                    webPartManager.SaveChanges(tiedostotWebPart);
                }
                if (osakkailleWebPart != null)
                {
                    webPartManager.MoveWebPart(osakkailleWebPart, "LeftColumnZone", 1);
                    webPartManager.SaveChanges(osakkailleWebPart);
                }

                //this.info("DataSourcesString property of web part '{0}' was sucessfully updated", webPartTitle);

                //this.info("Checkin file");
                file.Update();
                file.CheckIn("Reorder web parts");
                if (file.Item.ParentList.EnableMinorVersions)
                {
                    file.Publish("Reorder web parts");
                }
                //this.info("Web part was sucessfully updated");
            }
            catch (Exception x)
            {
                this.error("Error occured when update web part on '{0}' site:\n{1}\n{2}", pweb.Web.Url, x.Message, x.StackTrace);
                if (file.CheckOutStatus != SPFile.SPCheckOutStatus.None)
                {
                    file.UndoCheckOut();
                }
            }
            finally
            {
                if (webPartManager != null)
                {
                    if (webPartManager.Web != null)
                    {
                        webPartManager.Web.Dispose();
                    }
                    webPartManager.Dispose();
                }
            }
        }


        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 });
            }
        }
    }
}