using System;
using System.Globalization;
using System.Linq;
using System.Threading;
using System.Web.UI.WebControls.WebParts;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Publishing;
using Microsoft.SharePoint.WebPartPages;
using Taloyhtio.CondoUpdate.Common;

namespace CondoUpdate.RenameAsumisenOppaatWebPart
{
    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(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)
                        {
                            this.warn("Web site '{0}' doesn't exist. It will be ignored", url);
                            return;
                        }

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

                        this.renameWebpart(web);
                    }
                }
            }
            catch (Exception ex)
            {
                this.error("Error occured when update '{0}' site:\n{1}\n{2}", url, ex.Message, ex.StackTrace);
            }
        }

        private void renameWebpart(SPWeb web)
        {
            if (!PublishingWeb.IsPublishingWeb(web))
            {
                //log("Target web is not a publishing web");
                return;
            }
            var pweb = PublishingWeb.GetPublishingWeb(web);
            Thread.CurrentThread.CurrentUICulture = new CultureInfo((int)web.Language);

            // ensure feature is installed?

            SPLimitedWebPartManager webPartManager = null;
            try
            {
                //log("Get file");
                var file = pweb.DefaultPage;
                if (file == null)
                {
                    //log("Start page is null. Site won't be updated");
                    return;
                }

                ///log("File found");
                if (file.CheckOutType == SPFile.SPCheckOutType.None)
                {
                    file.CheckOut();
                }
                else
                {
                    file.UndoCheckOut();
                    file.CheckOut();
                }

                webPartManager = file.GetLimitedWebPartManager(PersonalizationScope.Shared);
                if (webPartManager == null)
                {
                    file.UndoCheckOut();
                    return;
                }

                bool shouldSavePage = false;
                var webParts = webPartManager.WebParts;
                if (webParts != null)
                {
                    foreach (System.Web.UI.WebControls.WebParts.WebPart wp in webParts)
                    {
                        //this.info("{0}: {1}", wp.GetType().FullName, wp.Title);
                        if (wp.GetType().FullName == "Taloyhtio.CondoAutomation.AsumisenOppaatWebPart")
                        {
                            if (wp.Title != "Asumisen oppaat")
                            {
                                shouldSavePage = true;
                                wp.Title = "Asumisen oppaat";
                                webPartManager.SaveChanges(wp);
                                break;
                            }
                        }
                    }
                }
                if (!shouldSavePage)
                {
                    file.UndoCheckOut();
                    return;
                }

                file.CheckIn("AsumisenWebPart is renamed");
                file.Update();
                file.Publish("AsumisenWebPart is renamed");
            }
            catch (Exception ex)
            {
                var file = pweb.DefaultPage;
                if (file.CheckOutType != SPFile.SPCheckOutType.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 });
            }
        }
    }
}