using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Net;
using System.Web;
using System.Web.Mvc;
using EnVisage.Code;
using EnVisage.Code.BLL;
using EnVisage.Code.Cache;
using EnVisage.Models;
using jQuery.DataTables.Mvc;
using EnVisage.App_Start;
using Microsoft.AspNet.Identity;
using EnVisage.Code.HtmlHelpers;
using System.Web.Helpers;
using System.Web.Script.Serialization;


namespace EnVisage.Controllers
{
    public class PreferencesItem
    {
        public string Key { get; set; }
        public string Value { get; set; }
    }

    [Authorize]
    public class ViewController : BaseController
    {
        /// <summary>
        /// GET: /View/
        /// </summary>
        /// <returns>Empty view</returns>
        [HttpGet]
		public ActionResult Index()
        {
            //if (!HtmlHelpers.CheckSecurityObjectPermission(null, Areas.Views, AccessLevel.Read))
            //    return Redirect("/");
            return View();
        }

        /// <summary>
        /// Returns JSON View list with filters and sort for jQuery DataTables
        /// </summary>
        [HttpPost]
		public JsonResult Index(JQueryDataTablesModel jQueryDataTablesModel)
        {
            int totalRecordCount;
            int searchRecordCount;

            var views = GetViews(startIndex: jQueryDataTablesModel.iDisplayStart,
                pageSize: jQueryDataTablesModel.iDisplayLength, sortedColumns: jQueryDataTablesModel.GetSortedColumns(),
                totalRecordCount: out totalRecordCount, searchRecordCount: out searchRecordCount, searchString: jQueryDataTablesModel.sSearch);

            return this.DataTablesJson(items: views,
                totalRecords: totalRecordCount,
                totalDisplayRecords: searchRecordCount,
                sEcho: jQueryDataTablesModel.sEcho);

        }

        private IEnumerable<ViewListModel> GetViews(int startIndex,
            int pageSize,
            IEnumerable<SortedColumn> sortedColumns,
            out int totalRecordCount,
            out int searchRecordCount,
            string searchString)
        {
            var query = from c in DbContext.Views
                        select new ViewListModel()
                        {
                            Id = c.Id,
                            Name = c.Name
                        };

            //filter
            if (!string.IsNullOrWhiteSpace(searchString))
            {
                query = query.Where(c => c.Name.ToLower().Contains(searchString.ToLower()));
            }

            //sort
            foreach (var sortedColumn in sortedColumns)
            {
                switch (sortedColumn.PropertyName)
                {
                    case "Id":
                        if (sortedColumn.Direction == SortingDirection.Ascending)
                            query = query.OrderBy(c => c.Id);
                        else
                            query = query.OrderByDescending(c => c.Id);
                        break;
                    //case "GLNumber":
                    //    if (sortedColumn.Direction == SortingDirection.Ascending)
                    //        query = query.OrderBy(c => c.GLNumber);
                    //    else
                    //        query = query.OrderByDescending(c => c.GLNumber);
                    //    break;
                    //case "ExpenditureCount":
                    //    if (sortedColumn.Direction == SortingDirection.Ascending)
                    //        query = query.OrderBy(c => c.ExpenditureCount);
                    //    else
                    //        query = query.OrderByDescending(c => c.ExpenditureCount);
                    //    break;
					default:
                        if (sortedColumn.Direction == SortingDirection.Ascending)
                            query = query.OrderBy(c => c.Name);
                        else
                            query = query.OrderByDescending(c => c.Name);
                        break;
                }
            }

            totalRecordCount = DbContext.Views.Count();
			searchRecordCount = query.Count();
            return query.Skip(startIndex).Take(pageSize).ToList();
		}

        // GET: /View/Edit/5
        [HttpGet]
		public ActionResult Edit(Guid? id, string backController, string backAction)
        {
            var model = new ViewModel();
            try
            {
                var manager = new ViewManager(DbContext);
                model = (ViewModel)manager.LoadWithChildCollections(id) ?? new ViewModel();
                if (!id.HasValue)
                {
                    model.UserId = new List<Guid>() { new Guid(HttpContext.User.Identity.GetID()) }; 
                }
                model.backController = backController;
                model.backAction = backAction;
                return PartialView("_editView", model);
            }
            catch (BLLException blEx)
            {
                if (blEx.DisplayError)
                {
                    //SetErrorScript(message: blEx.Message);
                }
                else
                {
                    LogException(blEx);
                    //SetErrorScript();
                    ModelState.AddModelError(string.Empty, "Cannot save view. Try again later.");
                }
            }
            catch (Exception exception)
            {
                LogException(exception);
                //SetErrorScript();
                ModelState.AddModelError(string.Empty, "Cannot save view. Try again later.");
            }
            
            HttpContext.Response.StatusCode = 500;
            HttpContext.Response.Clear();

            return PartialView("_editView", model);
        }

        // POST: /View/Edit/5
        [HttpPost]
        [ValidateAntiForgeryToken]
		public ActionResult Edit(ViewModel model)
        {
            if (ContentLocker.IsLock("View", model.Id.ToString(), User.Identity.Name))
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

            model.TrimStringProperties();

            if (ModelState.IsValid)
            {
                try
                {
                    var manager = new ViewManager(DbContext);
                    manager.Save(model);
                    DbContext.SaveChanges();
                    ContentLocker.RemoveLock("View", model.Id.ToString(), User.Identity.Name);
                    //return RedirectToAction("Index");
                    if (string.IsNullOrEmpty(model.backController))
                    {
                        model.backController = "View";
                        return Json(new { viewId = model.Id });
                    }
                    if (string.IsNullOrEmpty(model.backAction))
                    {
                        model.backAction = "Index";
                    }
                    return RedirectToAction(model.backAction, model.backController, model);
                }
                catch (BLLException blEx) // handle any system specific error
                {
                    // display error message if required
                    if (blEx.DisplayError)
                    {
                        ModelState.AddModelError(string.Empty, blEx.Message);
                    }
                    else // if display not requried then display modal form with general error message 
                    {
                        LogException(blEx);
                        SetErrorScript();
                    }
                    ModelState.AddModelError(string.Empty, "Cannot save view. Try again later.");
                }
                catch (Exception exception) // handle any unexpected error
                {
                    LogException(exception);
                    //SetErrorScript();
                    ModelState.AddModelError(string.Empty, "Cannot save view. Try again later.");
                }
            }
            // return empty model with validation messages (if any) 
            HttpContext.Response.StatusCode = 500;
            HttpContext.Response.Clear();

            return PartialView("_editView", model);
            
        }

        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Delete(Guid deleteViewId)
        {
            try
            {
                if (ContentLocker.IsLock("View", deleteViewId.ToString(), User.Identity.Name))
                    return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

                var manager = new ViewManager(DbContext);
                var dbObj = manager.Load(deleteViewId, false);
                if (dbObj == null)
                    return HttpNotFound();
                //if (dbObj.Team2View.Count > 0)
                //    return new HttpStatusCodeResult(HttpStatusCode.BadRequest,
                //"View has Teams assigned and could not be deleted");
                DbContext.Company2View.RemoveRange(DbContext.Company2View.Where(c2s => c2s.ViewId == dbObj.Id));
                var us = DbContext.User2View.Where(u2d => u2d.ViewId == dbObj.Id).ToList();
                DbContext.User2View.RemoveRange(us);
                DbContext.Team2View.RemoveRange(DbContext.Team2View.Where(tv => tv.ViewId == dbObj.Id));
                DbContext.Views.Remove(dbObj);
                DbContext.SaveChanges();
                ContentLocker.RemoveLock("View", dbObj.Id.ToString(), User.Identity.Name);
            }
            catch (BLLException blEx)
            {
                if (blEx.DisplayError)
                    SetErrorScript(message: blEx.Message);
                else
                {
                    LogException(blEx);
                    SetErrorScript();
                }
            }
            catch (Exception exception)
            {
                LogException(exception);
                SetErrorScript();
            }
            return RedirectToAction("Board", "View");
        }


        public ActionResult Board()
        {
            var model = new ViewBoardModel();

            // SA. ENV-804. Changed teams and views sorting
            var views = new ViewManager(DbContext).GetViewsByOwner(Guid.Parse(User.Identity.GetID()));
            if (!string.IsNullOrEmpty(Request.QueryString["viewId"]))
            {
                var theView = views.Where(x => x.Id.ToString() == Request.QueryString["viewId"].ToString()).FirstOrDefault();
                if (theView != null)
                    model.Views.Add(theView);
                else model.Views.Add(views.FirstOrDefault());
            }
            else 
                if (views.Count() > 0) model.Views.Add(views.OrderBy(x => x.Name).FirstOrDefault());//return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
            //model.Views = views.OrderBy(x => x.Name).ToList();
            
            // SA. ENV-815. Get User Preferences
            SetUserSelectedViewId(model);

            var teams = new ViewManager(DbContext).GetTeams(model.Views.Select(x => x.Id).FirstOrDefault());
            model.Teams = teams.OrderBy(x=>x.Name).ToList();
            
            var user = new UsersCache().Value.FirstOrDefault(x => x.Id == new Guid(HttpContext.User.Identity.GetID()));
            
            if (user != null)
                ViewBag.IsUOMHours = !user.PreferredResourceAllocation;
            return View(model);
        }

        /// <summary>
        /// Set initially selected view according to user preferences
        /// </summary>
        /// <param name="model"></param>
        /// <remarks>SA. ENV-815</remarks>
        private void SetUserSelectedViewId(ViewBoardModel model)
        {
            Guid selectedViewId = Guid.Empty;

            string userIdAsText = User.Identity.GetID();
            Guid userId = new Guid(userIdAsText);

            string pageUrl = HttpContext.Request.Url.AbsolutePath;

            var prefRecords = DbContext.UserPreferences.Where(x => x.UserId.Equals(userId) &&
                x.Url.Equals(pageUrl, StringComparison.InvariantCultureIgnoreCase) &&
                x.Section.Equals("viewsBlock", StringComparison.InvariantCultureIgnoreCase));

            if (prefRecords.Count() > 0)
            {
                string prefData = prefRecords.First().Data;
                JavaScriptSerializer ser = new JavaScriptSerializer();
                var data = ser.Deserialize <List<PreferencesItem>>(prefData);

                var selectedViewPrefs = data.Where(x => x.Key.Equals("pageSelectedView", StringComparison.InvariantCultureIgnoreCase) &&
                    x.Value.Length > 0).ToList();

                if (selectedViewPrefs.Count > 0)
                    Guid.TryParse(selectedViewPrefs.First().Value, out selectedViewId);
                    
            }


            if (model.Views.Count > 0)
            {
                List<Guid> viewIds = model.Views.Select(x => x.Id).ToList();

                if (!selectedViewId.Equals(Guid.Empty) && viewIds.Contains(selectedViewId))
                {
                    model.SelectedViewId = selectedViewId;
                    model.SelectedViewName = model.Views.Where(x => x.Id.Equals(selectedViewId)).Select(x => x.Name).First();
                }
                else
                {
                    model.SelectedViewId = viewIds.First();
                    model.SelectedViewName = model.Views.First().Name;
                }
            }
        }

        [HttpPost]
        public ActionResult GetTeams(Guid? viewId)
        {
			var model = new ViewBoardModel
			{
				Teams = new ViewManager(DbContext).GetTeams(viewId).ToList(),
				CalendarMaxDate = (from c in DbContext.FiscalCalendars where c.Type == 0 && c.AdjustingPeriod == false orderby c.StartDate descending select c.EndDate ).FirstOrDefault(),
                Id = viewId.Value
			};
			return PartialView("~/Views/View/_resourcesList.cshtml", model);
        }

        // GET: /View/Details/5
        [HttpGet]
        public ActionResult Details(Guid? id)
        {
            if (id == null || id == Guid.Empty)
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

            var model = new ViewModel();
            try
            {
                var manager = new ViewManager(DbContext);
                model = (ViewModel)manager.Load(id) ?? new ViewModel();
                if (model.Id == Guid.Empty)
                    return HttpNotFound();
            }
            catch (BLLException blEx)
            {
                if (blEx.DisplayError)
                    SetErrorScript(message: blEx.Message);
                else
                {
                    LogException(blEx);
                    SetErrorScript();
                }
            }
            catch (Exception exception)
            {
                LogException(exception);
                SetErrorScript();
            }
            return PartialView("_details", model);
        }
    }
}