using Microsoft.SharePoint;
using Microsoft.SharePoint.Utilities;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Taloyhtio.CondoUpdate.Common;

namespace CondoUpdate.ResponsiveLayout.AsumisenOppaat
{
    public class UpdaterImpl : ICondoUpdater
    {
        private readonly Guid OLD_FEATURE_ID = new Guid("8d788e09-59b6-4d7b-b31d-fd6855e0b15c");
        private readonly Guid WEB_FEATURE_ID = new Guid("2b106f86-7017-4641-b8b9-85b7ea131e24");
        private readonly string GUIDE_PAGE = "Energiajakoti.aspx";

        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);
                    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, GUIDE_PAGE, true) == 0);
                    if (!pageExists)
                    {
                        this.warn("guide pages not found on condo site '{0}'. skip", url);
                        return;
                        //this.warn("guide pages not found on condo site '{0}'. activating feature", url);
                        //web.Features.Add(OLD_FEATURE_ID, true);
                    }


                    if (!web.Features.Cast<SPFeature>().Any(f => f.DefinitionId.Equals(WEB_FEATURE_ID)))
                    {
                        web.Features.Add(WEB_FEATURE_ID, true);
                    }
                    else
                    {
                        this.warn("Feature already activated on condo site '{0}', ignore", url);
                    }
                }
            }
        }

        #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
    }
}