using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Web.Mvc;
using EnVisage.Code;
using EnVisage.Code.BLL;
using EnVisage.Models;
using jQuery.DataTables.Mvc;
using EnVisage.App_Start;

namespace EnVisage.Controllers
{
    [Authorize]
    public class CreditDepartmentController : BaseController
    {
	    #region Actions

	    /// <summary>
		/// GET: /CreditDepartments/
		/// </summary>
		/// <returns>Empty view</returns>
		[HttpGet]
        [AreaSecurity(area = Areas.CreditDepartments, level = AccessLevel.Read)]
        public ActionResult Index()
        {
            return View();
        }

        /// <summary>
        /// Returns JSON creditDepartments list with filters and sort for jQuery DataTables
        /// </summary>
        [HttpPost]
        [AreaSecurity(area = Areas.CreditDepartments, level = AccessLevel.Read)]
        public JsonResult Index(JQueryDataTablesModel jQueryDataTablesModel)
        {
            int totalRecordCount;
            int searchRecordCount;

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

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

        }

	    // GET: /CreditDepartment/Edit/5
	    [HttpGet]
	    [AreaSecurity(area = Areas.CreditDepartments, level = AccessLevel.Write)]
	    public ActionResult Edit(Guid? id)
	    {
		    var model = new CreditDepartmentModel();
		    try
		    {
			    if (id.HasValue)
			    {
				    var manager = new CreditDepartmentManager(DbContext);
				    model = manager.LoadCreditDepartmentModel(id.Value) ?? new CreditDepartmentModel();
			    }
		    }
		    catch (BLLException blEx)
		    {
			    if (blEx.DisplayError)
				    SetErrorScript(message: blEx.Message);
			    else
			    {
				    LogException(blEx);
				    SetErrorScript();
			    }
		    }
		    catch (Exception exception)
		    {
			    LogException(exception);
			    SetErrorScript();
		    }
		    return View(model);
	    }

	    // POST: /CreditDepartment/Edit/5
	    // Чтобы защититься от атак чрезмерной передачи данных, включите определенные свойства, для которых следует установить привязку. Дополнительные 
	    // сведения см. в статье http://go.microsoft.com/fwlink/?LinkId=317598.
	    [HttpPost]
	    [ValidateAntiForgeryToken]
	    [AreaSecurity(area = Areas.CreditDepartments, level = AccessLevel.Write)]
	    public ActionResult Edit(CreditDepartmentModel model)
	    {
		    if (ContentLocker.IsLock("CreditDepartment", model.Id.ToString(), User.Identity.GetUserName()))
			    return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

		    model.TrimStringProperties();

		    if (ModelState.IsValid)
		    {
			    try
			    {
				    var manager = new CreditDepartmentManager(DbContext);
				    manager.Save(model);
				    DbContext.SaveChanges();
				    ContentLocker.RemoveLock("CreditDepartment", model.Id.ToString(), User.Identity.GetUserName());
				    return RedirectToAction("Index");
			    }
			    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();
				    }
			    }
			    catch (Exception exception) // handle any unexpected error
			    {
				    LogException(exception);
				    SetErrorScript();
			    }
		    }
		    // return empty model with validation messages (if any) 
		    return View(model);
	    }

	    // GET: /CreditDepartment/Delete/5
	    [HttpGet]
	    [AreaSecurity(area = Areas.CreditDepartments, level = AccessLevel.Write)]
	    public ActionResult Delete(Guid? id)
	    {
		    if (id == null || id == Guid.Empty)
			    return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

		    var model = new CreditDepartmentModel();
		    try
		    {
			    var manager = new CreditDepartmentManager(DbContext);
			    model = manager.LoadCreditDepartmentModel(id.Value);

			    if (model == null)
				    return HttpNotFound();

			    if (model.ExpenditureCategoryCount > 0)
				    return new HttpStatusCodeResult(HttpStatusCode.BadRequest,
					    "Cost Center has Expenditure assigned and could not be deleted");
		    }
		    catch (BLLException blEx)
		    {
			    if (blEx.DisplayError)
				    SetErrorScript(message: blEx.Message);
			    else
			    {
				    LogException(blEx);
				    SetErrorScript();
			    }
		    }
		    catch (Exception exception)
		    {
			    LogException(exception);
			    SetErrorScript();
		    }
		    return View(model);
	    }

	    // POST: /CreditDepartment/Delete/5
	    [HttpPost]
	    [ValidateAntiForgeryToken]
	    [AreaSecurity(area = Areas.CreditDepartments, level = AccessLevel.Write)]
	    public ActionResult Delete(CreditDepartmentModel model)
	    {
		    if (ContentLocker.IsLock("CreditDepartment", model.Id.ToString(), User.Identity.GetUserName()))
			    return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

		    var manager = new CreditDepartmentManager(DbContext);
		    var dbObj = manager.Load(model.Id, false);
		    if (dbObj == null)
			    return HttpNotFound();
		    if (dbObj.ExpenditureCategory.Count > 0)
			    return new HttpStatusCodeResult(HttpStatusCode.BadRequest,
				    "Cost Center has projects assigned and could not be deleted");
		    DbContext.CreditDepartments.Remove(dbObj);
		    DbContext.SaveChanges();
		    ContentLocker.RemoveLock("CreditDepartment", dbObj.Id.ToString(), User.Identity.GetUserName());
		    return RedirectToAction("Index");
	    }

	    [HttpPost]
	    [ValidateJsonAntiForgeryToken]
	    public ActionResult LoadCreditDepartments()
	    {
		    try
		    {
			    var dictionary = new Dictionary<string, CreditDepartmentApiModel>();
			    var creditDepartments = (new CreditDepartmentManager(DbContext)).LoadCreditDepartments();
			    if (creditDepartments != null && creditDepartments.Any())
			    {
				    dictionary = creditDepartments.Select(x => new CreditDepartmentApiModel(x))
					    .ToDictionary(x => x.Id.ToString());
			    }

			    return Json(dictionary);
		    }
		    catch (Exception exception)
		    {
			    LogException(exception);
		    }

		    return new HttpStatusCodeResult(HttpStatusCode.InternalServerError);
	    }

		#endregion

		#region Private Methods

		private IEnumerable<CreditDepartmentListModel> GetCreditDepartments(int startIndex,
            int pageSize,
            IEnumerable<SortedColumn> sortedColumns,
            out int totalRecordCount,
            out int searchRecordCount,
            string searchString)
        {
            var query = from c in DbContext.CreditDepartments
                        select new CreditDepartmentListModel
                        {
                            Id = c.Id,
                            Name = c.Name,
                            CreditNumber = c.CreditNumber,
                            ExpenditureCount = c.ExpenditureCategory.Count
                        };

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

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

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

	    #endregion
		

        
    }
}