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

namespace CondoUpdate.ResponsiveLayout.EnableResponsiveLayoutAc
{
    public class UpdaterImpl:ICondoUpdater
    {
        private readonly Guid WEB_FEATURE_ID = new Guid("98523631-0ec3-4185-8d28-61c42712ca56");
        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)
        {
            this.enableResponsiveLayout(url);
        }

        private void enableResponsiveLayout(string url)
        {
            try
            {
                using (var site = new SPSite(url))
                {
                   
                    using (var web = site.RootWeb)
                    {
                        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.Site.Features.Any(f => f.DefinitionId.Equals(WEB_FEATURE_ID)))
                        {
                            web.Site.Features.Add(WEB_FEATURE_ID, true);
                        }
                        else
                        {
                            this.warn("Feature already activated on PMC '{0}', ignore", web.Url);
                        }

                        bool siteMaster = web.CustomMasterUrl.EndsWith("tallier_responsive_layout.master");
                        bool systemMaster = web.MasterUrl.EndsWith("tallier_responsive_layout_system.master");
                        if (!siteMaster || !systemMaster)
                        {
                            bool webAllowUnsafeUpdates = web.AllowUnsafeUpdates;
                            web.AllowUnsafeUpdates = true;

                            if (!siteMaster)
                                web.CustomMasterUrl = web.CustomMasterUrl.Replace(Path.GetFileName(web.CustomMasterUrl),
                                    "tallier_responsive_layout.master");

                            if (!systemMaster)
                                web.MasterUrl = web.MasterUrl.Replace(Path.GetFileName(web.MasterUrl),
                                    "tallier_responsive_layout_system.master");

                            web.Update();
                            web.AllowUnsafeUpdates = webAllowUnsafeUpdates;
                        }
                    }
                }
            }
            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 });
            }
        }
    }
}