using Microsoft.SharePoint;
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.ApuaListsRootTallier
{
    public class UpdaterImpl : ICondoUpdater
    {
        private readonly Guid WEB_FEATURE_ID = new Guid("dec174e3-e2c1-4ac3-a544-7857b79765c7");

        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.WebApplication.Sites[0].RootWeb)
                {
                    if (!web.Exists)
                    {
                        this.warn("root site collection doesn't exist. It will be ignored");
                        return;
                    }

                    Thread.CurrentThread.CurrentUICulture = new CultureInfo((int)web.Language);
                    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 root site collection, ignore");
                    }
                }
            }
        }

        #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
    }
}