using System;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Threading;
using System.Xml;
using Microsoft.SharePoint;
using Taloyhtio.CondoUpdate.Common;

namespace CondoUpdate.ActivateCustomAlertHandler
{
    public class UpdaterImpl : ICondoUpdater
    {
        private readonly Guid SPSOLUTIONS_ALERT_HANDLER_SITE_FEATURE_ID = new Guid("230FADC0-9081-40f9-B2AA-C589D3D3E0E8");
        private readonly Guid TALOYHTIO_ALERT_HANDLER_SITE_FEATURE_ID = new Guid("8cc68f6e-e53a-4f16-baba-307b82d607fb");

        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 condoWeb = site.OpenWeb())
                {
                    if (!condoWeb.Exists || string.Compare(condoWeb.Url, url, true) != 0)
                    {
                        return;
                    }

                    Thread.CurrentThread.CurrentUICulture = new CultureInfo((int)condoWeb.Language);
                    this.ensureSiteFeatureActivated(site);
                }
            }
        }

        private void ensureSiteFeatureActivated(SPSite site)
        {
            if (!site.Features.Any(f => f.DefinitionId == SPSOLUTIONS_ALERT_HANDLER_SITE_FEATURE_ID))
            {
                site.Features.Add(SPSOLUTIONS_ALERT_HANDLER_SITE_FEATURE_ID, false);
            }
            if (!site.Features.Any(f => f.DefinitionId == TALOYHTIO_ALERT_HANDLER_SITE_FEATURE_ID))
            {
                site.Features.Add(TALOYHTIO_ALERT_HANDLER_SITE_FEATURE_ID, false);
            }
        }

        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 });
            }
        }
    }
}