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

namespace CondoUpdate.UpdateResponsiveTaloytioCss
{
    public class UpdaterImpl:ICondoUpdater
    {
        private readonly Guid RESPONSIVE_LAYOUT_FEATURE_ID = new Guid("b45babd2-5e1c-4d9d-ac53-5ae87d7ea69d");
        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))
                {
                    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(RESPONSIVE_LAYOUT_FEATURE_ID)))
                    {
                        this.info("ResponsiveLayout feature is not activated on PMC '{0}', ignore", web.Url);
                        return;
                    }
                    //web.Site.Features.Add(RESPONSIVE_LAYOUT_FEATURE_ID, true);

                    //updateFile(web, "/css/taloyhtio.css");
                    updateFile(web, "/js/taloyhtio.js");
                }
            }
            catch (Exception ex)
            {
                this.error("Error occured when update '{0}' site:\n{1}\n{2}", url, ex.Message, ex.StackTrace);
            }
        }

        private bool updateFile(SPWeb web, string path)
        {
            string fileUrl = SPUrlUtility.CombineUrl(web.ServerRelativeUrl, "/Style Library/taloyhtio_responsive" + path);
            var file = web.GetFile(fileUrl);
            if (!file.Exists)
            {
                this.warn("File '{0}' not found", fileUrl);
                return true;
            }

            string filePath = SPUtility.GetCurrentGenericSetupPath("Template/Features/ResponsiveLayout_Taloyhtio.ResponsiveLayout/ResponsiveDesignFiles" + path);
            if (!File.Exists(filePath))
            {
                this.warn("File '{0}' not found", filePath);
                return true;
            }

            if (file.CheckOutStatus != SPFile.SPCheckOutStatus.None)
            {
                file.UndoCheckOut();
            }

            file.CheckOut();

            var folder = file.ParentFolder;
            using (var fs = File.OpenRead(filePath))
            {
                folder.Files.Add(file.Name, fs, true);
            }

            file.CheckIn("Responsive files update");

            if (file.Item.ParentList.EnableMinorVersions)
            {
                file.Publish("Responsive files update");
            }

            if (file.Item.ParentList.EnableModeration)
            {
                file.Approve("Responsive files update");
            }
            return false;
        }

        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 });
            }
        }
    }
}