using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Security.Principal;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Web;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Utilities;
using Microsoft.SharePoint.WebControls;
using Taloyhtio.CondoAutomation.Utils;

namespace CondoAutomation.CondoCreator
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length != 2)
            {
                log("Usage: .exe <site_col_url> <file_with_condos> (file lines structure: <condo_name>;<condo_short_name>;<condo_url>;<business_id>)");
                return;
            }

            string siteColUrl = args[0];
            string filePath = args[1];


            var parser = new Parser();
            var info = parser.Parse(filePath);
            if (info == null || info.Count == 0)
            {
                log("Parsed info is empty");
                return;
            }


            foreach (var creationInfo in info)
            {
                string condoName = creationInfo.Name;
                string condoShortName = creationInfo.ShortName;
                string condoUrl = creationInfo.Url;
                string businessId = creationInfo.BusinessId;

                if (!validateUrl(siteColUrl, condoUrl))
                {
                    log("Condo url is invalid");
                    return;
                }

                using (var site = new SPSite(siteColUrl))
                {
                    if (!validateNameIsUnique(site, condoName))
                    {
                        log("Condo name is already used");
                        return;
                    }

                    if (!validateShortNameIsUnique(site, condoShortName))
                    {
                        log("Condo short name is already used");
                        return;
                    }

                    var rootWeb = site.RootWeb;

                    //                AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
                    //                HttpContext.Current = new HttpContext(new HttpRequest("", rootWeb.Url, ""), new HttpResponse(TextWriter.Null));
                    //                HttpContext.Current.Items["HttpHandlerSPWeb"] = rootWeb;
                    //                HttpContext.Current.User = Thread.CurrentPrincipal as WindowsPrincipal;

                    try
                    {
                        log(
                            "Creating condo: site col '{0}', condo name '{1}', condo short name '{2}', condo url '{3}', business id '{4}'",
                            siteColUrl, condoName, condoShortName, condoUrl, businessId);
                        string webTemplate = null;
                        using (var web = rootWeb.Webs.Add(
                            //strFullWebUrl,
                            condoUrl,
                            condoName,
                            "", // description
                            1035,
                            webTemplate,
                            true, // unique permissions
                            false))
                        {
                            WebPropertyHelper.Set(web, Constants.PropertyBag.KEY_CONDO_SHORT_NAME, condoShortName);

                            log("Applying web template...");
                            web.ApplyWebTemplate("TaloyhtioCondoSitePortal#0");

                            log("Post configuration...");
                            string url = SPUrlUtility.CombineUrl(web.Url, string.Format("_layouts/15/Taloyhtio/PostConfigurationHandler.ashx?{0}={1}",
                                Constants.QueryString.BUSINESS_ID, HttpUtility.UrlEncode(businessId)));
                            var request = (HttpWebRequest) WebRequest.Create(url);
                            request.Credentials = CredentialCache.DefaultNetworkCredentials;
                            var response = (HttpWebResponse) request.GetResponse();
                            if (response.StatusCode != HttpStatusCode.OK)
                            {
                                log(
                                    "Error occured during sending request to post configuration handler: response code is '{0}'",
                                    response.StatusCode);
                            }
                            else
                            {
                                log("Condo site was successfully created");
                            }
                        }
                    }
                    catch (Exception x)
                    {
                        log("Error occured: {0}\n{1}", x.Message, x.StackTrace);
                    }
                }
            }
        }

        private static bool validateUrl(string siteUrl, string condoUrl)
        {
            try
            {
                string strFullWebUrl = SPUrlUtility.CombineUrl(siteUrl, condoUrl);
                var uri = new Uri(strFullWebUrl);
                ReflectionHelper.CallStaticMethod(typeof (SPWebCollection), "ValidateWebUrl", uri);
                return true;
            }
            catch
            {
                return false;
            }
        }

        protected static bool validateNameIsUnique(SPSite site, string condoName)
        {
            return (!isWebExists(site, w => string.Compare(w.Title, condoName, true) == 0));
        }

        protected static bool validateShortNameIsUnique(SPSite site, string condoShortName)
        {
            return (!isWebExists(site, w => string.Compare(WebPropertyHelper.Get(w, Constants.PropertyBag.KEY_CONDO_SHORT_NAME) as string, condoShortName, true) == 0));
        }

        private static bool isWebExists(SPSite site, Func<SPWeb, bool> checker)
        {
            if (checker(site.RootWeb))
            {
                return true;
            }

            return site.AllWebs.Cast<SPWeb>().Any(w => isWebExists(w, checker));
        }

        private static bool isWebExists(SPWeb web, Func<SPWeb, bool> checker)
        {
            if (checker(web))
            {
                return true;
            }

            return web.Webs.Cast<SPWeb>().Any(w => isWebExists(w, checker));
        }

        private static void log(string msg, params object[] args)
        {
            try
            {
                if (args.Length > 0)
                {
                    msg = string.Format(msg, args);
                }
                msg = string.Format("{0} (thread id: {1})\t{2}\n", DateTime.Now.ToString("yyyy.MM.dd HH:mm:ss"), Thread.CurrentThread.ManagedThreadId, msg);
                Console.WriteLine(msg);
                File.AppendAllText("log_condoCreator.txt", msg);
            }
            catch
            {
            }
        }
    }
}