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

namespace EnVisage.Controllers
{
    public class ContactController : BaseController
    {
		/// <summary>
		/// An UI representation of company contact to be displayed as list items
		/// </summary>
		public class ListCompanyContact
		{
			public Guid Id { get; set; }
			public string FirstName { get; set; }
			public string LastName { get; set; }
			public string Company { get; set; }
			public string Email { get; set; }
			public string Phone { get; set; }
			public int Contact2ProjectLinks { get; set; }
			public string Classification { get; set; }
		}
		
		// GET: /Contact/
        public ActionResult Index()
        {
            return View();
        }

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

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

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

        }

		private IEnumerable<ListCompanyContact> GetContacts(int startIndex,
            int pageSize,
            IEnumerable<SortedColumn> sortedColumns,
            out int totalRecordCount,
            out int searchRecordCount,
            string searchString)
        {
			int companyContactType = ContactType.CompanyContact.GetHashCode();
			
			var query = from c in DbContext.Contacts
						join cmp in DbContext.Companies on c.ParentId equals cmp.Id
						where c.Type == companyContactType
						select new ListCompanyContact
						{
							Id = c.Id,
							FirstName = c.FirstName,
							LastName = c.LastName,
							Email = c.Email,
							Phone = c.Phone,
							Company = cmp.Name,
							Contact2ProjectLinks = c.Contact2Project.Count(),
							Classification = ((InternalContactClassification)c.ContactClassification).ToString()
						};

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

            //sort
            foreach (var sortedColumn in sortedColumns)
            {
                switch (sortedColumn.PropertyName)
                {
                    case "Email":
                        if (sortedColumn.Direction == SortingDirection.Ascending)
                            query = query.OrderBy(c => c.Email);
                        else
                            query = query.OrderByDescending(c => c.Email);
                        break;
                    case "Phone":
                        if (sortedColumn.Direction == SortingDirection.Ascending)
                            query = query.OrderBy(c => c.Phone);
                        else
                            query = query.OrderByDescending(c => c.Phone);
                        break;
                    case "Company":
                        if (sortedColumn.Direction == SortingDirection.Ascending)
							query = query.OrderBy(c => c.Company);
                        else
							query = query.OrderByDescending(c => c.Company);
                        break;
					case "Contact2ProjectLinks":
						if (sortedColumn.Direction == SortingDirection.Ascending)
							query = query.OrderBy(c => c.Contact2ProjectLinks);
						else
							query = query.OrderByDescending(c => c.Contact2ProjectLinks);
						break;
					case "Classification":
						if (sortedColumn.Direction == SortingDirection.Ascending)
							query = query.OrderBy(c => c.Classification);
						else
							query = query.OrderByDescending(c => c.Classification);
						break;
					default:
                        if (sortedColumn.Direction == SortingDirection.Ascending)
                            query = query.OrderBy(c => c.LastName);
                        else
                            query = query.OrderByDescending(c => c.LastName);
                        break;
                }
            }

			totalRecordCount = DbContext.Contacts.Where(c => c.Type == companyContactType).Count();
            searchRecordCount = query.Count();
			return query.Skip(startIndex).Take(pageSize).ToList();
        }

        // GET: /Contact/Edit/5
        [HttpGet]
        [AreaSecurityAttribute(area = Areas.Company, level = AccessLevel.Write)]
        public ActionResult Edit(Guid? id)
        {
            var model = new ContactModel();
            try
            {
				var manager = new ContactManager(DbContext);
				model = (ContactModel)manager.Load(id) ?? new ContactModel();
            }
            catch (BLLException blEx)
            {
                if (blEx.DisplayError)
                    SetErrorScript(message: blEx.Message);
                else
                {
                    LogException(blEx);
                    SetErrorScript();
                }
            }
            catch (Exception exception)
            {
                LogException(exception);
                SetErrorScript();
            }
            if (model == null) model = new ContactModel();
            return View(model);
        }

        // POST: /Contact/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]
        [AreaSecurityAttribute(area = Areas.Company, level = AccessLevel.Write)]
        public ActionResult Edit(ContactModel model)
        {
            if (ContentLocker.IsLock("Contact", model.Id.ToString(), User.Identity.Name))
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

            model.TrimStringProperties();
            //if (model.Id == new Guid()) model.Id = Guid.NewGuid();
            if (ModelState.IsValid)
            {
                try
                {
					model.Type = ContactType.CompanyContact;
                    var manager = new ContactManager(DbContext);
                    manager.Save(model);
                    DbContext.SaveChanges();
                    ContentLocker.RemoveLock("Contact", model.Id.ToString(), User.Identity.Name);
                    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: /Contact/Delete/5
        [HttpGet]
        [AreaSecurityAttribute(area = Areas.Company, level = AccessLevel.Write)]
        public ActionResult Delete(Guid? id)
        {
            if (id == null || id == Guid.Empty)
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

            var model = new ContactModel();
            try
            {
                var manager = new ContactManager(DbContext);
                model = (ContactModel)manager.Load(id);
                if (model == null)
                    return HttpNotFound();
            }
            catch (BLLException blEx)
            {
                if (blEx.DisplayError)
                    SetErrorScript(message: blEx.Message);
                else
                {
                    LogException(blEx);
                    SetErrorScript();
                }
            }
            catch (Exception exception)
            {
                LogException(exception);
                SetErrorScript();
            }
            return View(model);
        }

        // POST: /Contact/Delete/5
        [HttpPost]
        [ValidateAntiForgeryToken]
        [AreaSecurityAttribute(area = Areas.Company, level = AccessLevel.Write)]
        public ActionResult Delete(ContactModel model)
        {
            if (ContentLocker.IsLock("Contact", model.Id.ToString(), User.Identity.Name))
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);

            var manager = new ContactManager(DbContext);
            var dbObj = manager.Load(model.Id, false);
            if (dbObj == null)
                return HttpNotFound();
            DbContext.Contacts.Remove(dbObj);
            DbContext.SaveChanges();
            ContentLocker.RemoveLock("Contact", dbObj.Id.ToString(), User.Identity.Name);
            return RedirectToAction("Index");
        }
    }
}