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

namespace CondoUpdate.RemoveTilaaAndIlmoitaList
{
    public class UpdaterImpl:ICondoUpdater
    {
        private readonly Guid webFeatureId = new Guid("28612bce-9bf5-423f-94d4-481fea2b5b40");
        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.CurrentUICulture = new CultureInfo((int) web.Language);

                        if (!web.Features.Any(f => f.DefinitionId.Equals(webFeatureId)))
                        {
                            this.warn("Tilaa and Ilmoita feature is not activated");
                            return;
                        }

                        var list = web.Lists.Cast<SPList>().FirstOrDefault(l => l.Title == "Tilaa and Ilmoita");
                        if (list == null)
                        {
                            this.warn("Tilaa and Ilmoita list not found");
                            return;
                        }
                        list.Delete();
                    }
                }
            }
            catch (Exception ex)
            {
                this.error("Error occured when update '{0}' site:\n{1}\n{2}", url, ex.Message, ex.StackTrace);
            }
        }

        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 });
            }
        }
    }
}