using System;
using System.Linq;
using System.Net;
using System.Web.Mvc;
using EnVisage.Code;
using EnVisage.Code.BLL;
using EnVisage.Models;
using EnVisage.Code.Validation;

namespace EnVisage.Controllers
{
    [Authorize]
    public class UserQuickLinkController : BaseController
    {
	    #region Private

	    private const string CannotSave = @"Cannot save link. Try again later.";
	    private const string CannotDelete = @"Cannot delete link. Try again later.";

		#endregion


		// GET: /Type/Edit/5
		[HttpGet]
        [AreaSecurity(area = Areas.UserQuickLinks, level = AccessLevel.Write)]
        public ActionResult Edit(Guid? id)
        {
            try
            {
                var manager = new UserQuickLinkManager(DbContext);
                var model = manager.GetUserQuickLinkById(id) ?? new UserQuickLinkModel();

                return PartialView("_editQuickLink", model);
            }
            catch (Exception exception)
            {
                LogException(exception);
            }

            return new HttpStatusCodeResult(HttpStatusCode.InternalServerError);
        }

        // POST: /Type/Edit/5
        [HttpPost]
        [ValidateAjax]
        [ValidateAntiForgeryToken]
        [AreaSecurity(area = Areas.UserQuickLinks, level = AccessLevel.Write)]
        public ActionResult Edit(UserQuickLinkModel model)
        {
            try
            {
                if (model == null)
                    throw new ArgumentNullException("model");

                model.TrimStringProperties();
	            var userQuickLink = model.Id != Guid.Empty ? DbContext.UserQuickLinks.FirstOrDefault(x => x.Id == model.Id) : new UserQuickLink();
                model.CopyTo(userQuickLink);

	            if (userQuickLink != null)
	            {
		            if (model.Id == Guid.Empty)
		            {
			            userQuickLink.Id = Guid.NewGuid();
			            DbContext.UserQuickLinks.Add(userQuickLink);
		            }
		            DbContext.SaveChanges();

		            var res = new
		            {
			            Id = userQuickLink.Id.ToString(),
			            userQuickLink.Name,
			            UserId = userQuickLink.UserId.ToString(),
			            userQuickLink.Url,
		            };
					return new SuccessContentJsonResult(res);
	            }
            }
            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);
                    ModelState.AddModelError(string.Empty, CannotSave);
                }
            }
            catch (Exception exception) // handle any unexpected error
            {
                LogException(exception);
                ModelState.AddModelError(string.Empty, CannotSave);
            }

            return new FailedJsonResult(ModelState);
        }

        [AreaSecurity(area = Areas.UserQuickLinks, level = AccessLevel.Write)]
        public ActionResult Delete(Guid? id)
        {
            if (!id.HasValue || id == Guid.Empty)
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

            try
            {
                var manager = (new UserQuickLinkManager(DbContext));
                var model = manager.GetUserQuickLinkById(id);
                if (model == null)
                    return HttpNotFound();

                return PartialView("_deleteQuickLink", model);
            }
            catch (Exception exception)
            {
                LogException(exception);
            }

            return new HttpStatusCodeResult(HttpStatusCode.InternalServerError);
        }

        // POST: /Type/Delete/5
        [HttpPost]
        [ValidateAntiForgeryToken]
        [AreaSecurity(area = Areas.UserQuickLinks, level = AccessLevel.Write)]
        public ActionResult Delete(Guid id)
        {
            try
            {
                var dbObj = DbContext.UserQuickLinks.FirstOrDefault(x => x.Id == id);
                if (dbObj == null)
                    throw new InvalidOperationException(string.Format("System cannot delete quick link {0} because it does not exist", id));

                DbContext.UserQuickLinks.Remove(dbObj);
                DbContext.SaveChanges();

                return new SuccessContentJsonResult(id);
            }
            catch (BLLException blEx)
            {
                if (blEx.DisplayError)
                    ModelState.AddModelError(string.Empty, blEx.Message);
                else
                {
                    LogException(blEx);
                    ModelState.AddModelError(string.Empty, CannotDelete);
                }
            }
            catch (Exception exception)
            {
                LogException(exception);
                ModelState.AddModelError(string.Empty, CannotDelete);
            }

            return new FailedJsonResult(ModelState);
        }

        [HttpPost]
        public ActionResult GetPreferences(Guid linkId)
        {
            string userIdAsText = User.Identity.GetID();

            try
            {
                // Validate user
                var user = DbContext.AspNetUsers.FirstOrDefault(t => t.Id == userIdAsText);
                Guid userId = new Guid(userIdAsText);

                if (user == null)
                    throw new Exception(string.Format("Unknown user id ({0})", userIdAsText));

                string prefData = String.Empty;

                var prefRecords = DbContext.UserQuickLinks.Where(x => x.UserId.Equals(userId) &&
                    x.Id.Equals(linkId));

                if (prefRecords.Any())
                    prefData = prefRecords.First().PageState;
                if (prefData == null)
                    prefData = "";
                var pagePreferences = new
                {
                    Status = "OK",
                    Data = prefData
                };

                return Json(pagePreferences, JsonRequestBehavior.AllowGet);
            }
            catch (BLLException blEx)
            {
                if (blEx.DisplayError)
                    SetErrorScript(message: blEx.Message);
                else
                {
                    LogException(blEx);
                    SetErrorScript();
                }
            }
            catch (Exception exception)
            {
                LogException(exception);
                SetErrorScript();
            }

            return new HttpStatusCodeResult(HttpStatusCode.InternalServerError);
        }
    }
}