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

namespace CondoUpdate.ResponsiveLayout.AsumisenPankki
{
    public class UpdaterImpl : ICondoUpdater
    {
        private readonly Guid CONDO_AUTOMATION_ASUMISEN_OPPAAT_FEATURE_ID = new Guid("2b106f86-7017-4641-b8b9-85b7ea131e24");
        private readonly Guid CONDO_AUTOMATION_ASUMISEN_PANKKI_FEATURE_ID = new Guid("84fb0469-2139-41aa-968d-29606bff961f");
        private readonly Guid ASUMISEN_PANKKI_CLEANUP_FEATURE_ID = new Guid("e9d2a4ea-df84-4b55-aebc-b1ff492edc05");
        private readonly Guid ASUMISEN_PANKKI_FEATURE_ID = new Guid("6d44d109-1726-4b8e-89ab-670222e7d81d");

        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)
        {
            using (var site = new SPSite(url))
            {
                using (var web = site.OpenWeb())
                {
                    if (!web.Exists)
                    {
                        this.warn("Condo site '{0}' doesn't exist. It will be ignored", url);
                        return;
                    }

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

                    // at first remove Condo automation - Asumisen oppaat feature if it is activated. After that
                    // condo won't have Assumisen oppaat item in global navigation (see CondoAutomation > topnavigation.js)
                    if (web.Features.Any(f => f.DefinitionId.Equals(CONDO_AUTOMATION_ASUMISEN_OPPAAT_FEATURE_ID)))
                    {
                        web.Features.Remove(CONDO_AUTOMATION_ASUMISEN_OPPAAT_FEATURE_ID);
                    }

                    // then remove Asumisen oppaat web part if it exists
                    this.removeAsumisenOppaatWebpart(web);

                    // activate cleanup feature which will delete asumisentietopankki.aspx. As result it won't have multiple web parts
                    // after activation of Asumisen pankki feature which will recreate the page
                    web.Features.Add(ASUMISEN_PANKKI_CLEANUP_FEATURE_ID, true);
                    // add asumisentietopankki.aspx page
                    web.Features.Add(ASUMISEN_PANKKI_FEATURE_ID, true);
                    // add Asumisen pankki web part and Lisapalvelut plugin
                    web.Features.Add(CONDO_AUTOMATION_ASUMISEN_PANKKI_FEATURE_ID, true);
                }
            }
        }

        private void removeAsumisenOppaatWebpart(SPWeb web)
        {
            //this.info("1");
            if (!PublishingWeb.IsPublishingWeb(web))
            {
                //this.info("2");
                //LogUtils.LogError("Target web is not a publishing web");
                return;
            }
            //this.info("3");
            var pweb = PublishingWeb.GetPublishingWeb(web);
            Thread.CurrentThread.CurrentUICulture = new CultureInfo((int)web.Language);

            SPLimitedWebPartManager webPartManager = null;
            try
            {
                //this.info("4");
                var file = pweb.DefaultPage;
                if (file == null)
                {
                    //this.info("5");
                    //LogUtils.LogError("Start page is null. Site won't be updated");
                    return;
                }
                //this.info("6");
                if (file.CheckOutType == SPFile.SPCheckOutType.None)
                {
                    //this.info("7");
                    file.CheckOut();
                }
                else
                {
                    //this.info("8");
                    file.UndoCheckOut();
                    file.CheckOut();
                }

                //this.info("9");
                webPartManager = file.GetLimitedWebPartManager(System.Web.UI.WebControls.WebParts.PersonalizationScope.Shared);
                if (webPartManager == null)
                {
                    //this.info("10");
                    //LogUtils.LogError("Web part manager is null. Site won't be updated");
                    file.UndoCheckOut();
                    return;
                }

                //this.info("11");
                bool webPartFound = false;
                var webParts = webPartManager.WebParts;
                if (webParts != null)
                {
                    foreach (WebPart wp in webParts)
                    {
                        //this.info("12 " + wp.GetType().FullName);
                        if (wp.GetType().FullName == "Taloyhtio.CondoAutomation.AsumisenOppaatWebPart")
                        {
                            //this.info("13");
                            webPartFound = true;
                            webPartManager.DeleteWebPart(wp);
                            break;
                        }
                    }
                }

                ////this.info("14");
                if (!webPartFound)
                {
                    //this.info("15");
                    file.UndoCheckOut();
                    return;
                }

                //this.info("16");
                file.CheckIn("AsumisenOppaatWebPart is deleted");
                file.Update();
                file.Publish("AsumisenOppaatWebPart is deleted");
                web.Update();
            }
            catch (Exception ex)
            {
                //this.info("17 " + ex.Message);
                //LogUtils.LogError("An error occured while trying to delete web part to the '{0}' site:\n{1}\n{2}", pweb.Web.Url, ex.Message, ex.StackTrace);
                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();
                }
            }
        }

        #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
    }
}