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

namespace CondoUpdate.AddContactsWebPart
{
    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))
            {
                var web = site.RootWeb;
                if (!web.MasterUrl.ToLower().EndsWith("taloyhtio_custom_layout_system.master"))
                {
                    return;
                }

                var file = web.GetFile(web.MasterUrl);
                if (file.CheckOutStatus != SPFile.SPCheckOutStatus.None)
                {
                    // if file was checked out by another user, need undo check out
                    file.UndoCheckOut();
                }

                string content = "";
                using (var sr = new StreamReader(file.OpenBinaryStream()))
                {
                    content = sr.ReadToEnd();
                }

                if (string.IsNullOrEmpty(content))
                {
                    this.warn("Masterpage content is empty");
                    return;
                }

                if (content.Contains("\"SPSecurityTrimmedControlEditList\""))
                {
                    this.warn("Masterpage already has SPSecurityTrimmedControlEditList");
                    return;
                }

                int idx1 = content.IndexOf("SPSecurityTrimmedControlPages");
                if (idx1 < 0)
                {
                    this.warn("SPSecurityTrimmedControlPages sub string not found");
                    return;
                }
                int start = idx1 + "SPSecurityTrimmedControlPages".Length;
                int idx2 = content.Substring(start).IndexOf("</SharePoint:SPSecurityTrimmedControl>");
                if (idx2 < 0)
                {
                    this.warn("</SharePoint:SPSecurityTrimmedControl> sub string not found");
                    return;
                }

                int insertAt = start + idx2 + "</SharePoint:SPSecurityTrimmedControl>".Length;

                var subStr1 = content.Substring(0, insertAt);
                if (!subStr1.EndsWith("</SharePoint:SPSecurityTrimmedControl>"))
                {
                    // something go wrong
                    this.warn("subStr1 doesn't end with </SharePoint:SPSecurityTrimmedControl>");
                    return;
                }
                var subStr2 = content.Substring(insertAt);
                string newStr =
                    subStr1 +
                    "\n<SharePoint:SPSecurityTrimmedControl ID=\"SPSecurityTrimmedControlEditList\" PermissionsString=\"AddListItems\" PermissionContext=\"CurrentList\" runat=\"server\">" +
                    "    <script type=\"text/javascript\">" +
                    "        document.getElementById(\"s4-ribbonrow\").style.display = \"block\";" +
                    "        document.getElementById(\"RibbonContainer-TabRowRight\").style.visibility = \"hidden\";" +
                    "    </script>" +
                    "</SharePoint:SPSecurityTrimmedControl>" +
                    subStr2;

                newStr = newStr.Replace("&nbsp; </Triggers>", " </Triggers>");

                file.CheckOut();

                var catalog = site.GetCatalog(SPListTemplateType.MasterPageCatalog);
                var files = catalog.RootFolder.Files;
                file = files.Add(web.MasterUrl, Encoding.UTF8.GetBytes(newStr), true);

                file.CheckIn("Attachments ribbon button fix");

                if (file.Item.ParentList.EnableMinorVersions)
                {
                    file.Publish("Attachments ribbon button fix");
                }

                if (file.Item.ParentList.EnableModeration)
                {
                    file.Approve("Attachments ribbon button fix");
                }
            }
        }

        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 });
            }
        }
    }
}