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

namespace CondoUpdate.ResponsiveLayout.SetDefaultPageLayoutAc
{
    public class UpdaterImpl : ICondoUpdater
    {
        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.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);

                    // page templates
                    var pweb = PublishingWeb.GetPublishingWeb(web);
                    var pageLayouts = new List<PageLayout>(pweb.GetAvailablePageLayouts());
                    var responsivePageLayout = pageLayouts.FirstOrDefault(l => string.Compare(l.Name, "tallier_responsive_layout.aspx", true) == 0);
                    if (responsivePageLayout == null)
                    {
                        this.error("Responsive page layout not found. Site will be skipped");
                        return;
                    }

                    this.fixWeb(web, responsivePageLayout);
                }
            }
        }

        private void fixWeb(SPWeb web, PageLayout responsivePageLayout)
        {
            var pweb = PublishingWeb.GetPublishingWeb(web);
            if (web.ID == web.Site.RootWeb.ID || !pweb.IsInheritingDefaultPageLayout)
            {
                pweb.SetDefaultPageLayout(responsivePageLayout, true);
                pweb.Update();
            }

            foreach (SPWeb subWeb in web.Webs)
            {
                this.fixWeb(subWeb, responsivePageLayout);
            }
        }

        #region notifier
        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
    }
}