using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.EntityFrameworkCore;
using EveryThing.Data;
using EveryThing.Models;
using EveryThing.Models.Transport;
using DocumentFormat.OpenXml.Spreadsheet;
using EveryThing.Models.CodeTable;
using NuGet.Packaging;

namespace EveryThing.Pages.TransportLoadingOrder
{
    [Authorize(Roles = "Administrator,TransportThingUser")]
    public class AddEditModel : PageModel
    {
        private readonly ApplicationDbContext _context;
        private readonly UserManager<IdentityApplicationUser> _userManager;

        public AddEditModel(ApplicationDbContext context, UserManager<IdentityApplicationUser> userManager)
        {
            _context = context;
            _userManager = userManager;
        }

        [BindProperty]
        public Models.Transport.TransportLoadingOrder TransportLoadingOrder { get; set; }

        [BindProperty]
        public TransportLoadingOrderLoadUnload TransportLoadingOrderLoadUnload { get; set; }

        [BindProperty]
        public List<SelectListItem> Vehicles { get; set; }

        public async Task<IActionResult> OnGetAsync(int? id)
        {
            var user = _userManager.GetUserAsync(User).Result;

            ViewData["IdPartnerFk"] = new SelectList(_context.CodeTablePartners
                .Where(x => x.IdCompanyFk == user.IdCompanyFk && x.Active && x.Transporter), "IdPartner", "Title");
            SetVehiclesBag(user.IdCompanyFk);
            ViewData["IdLoadingFk"] = new SelectList(_context.CodeTablePartners
                .Where(x => x.IdCompanyFk == user.IdCompanyFk && x.Active && x.LoadingOrderLoadUnload), "IdPartner", "Title");
            ViewData["IdUnloadingFk"] = new SelectList(_context.CodeTablePartners
                .Where(x => x.IdCompanyFk == user.IdCompanyFk && x.Active && x.LoadingOrderLoadUnload), "IdPartner", "Title");

            ViewData["States"] = new SelectList(Enum.GetValues(typeof(Models.Transport.TransportLoadingOrder.TransportLoadingOrderState))
                .Cast<Models.Transport.TransportLoadingOrder.TransportLoadingOrderState>()
                .Select(x => new { Name = Classes.Global.GetAttribute<DisplayAttribute>(x).Name, Value = x.ToString() })
                .ToList(), "Value", "Name");

            if (id == null)
            {
                var prePostTexts = _context.CodeTablePrePostTextLink
                    .Include(x => x.CodeTablePrePostText)
                    .Where(x => x.CodeTablePrePostText.IdCompanyFk == user.IdCompanyFk 
                                && x.Link == CodeTablePrePostTextLink.LinkEnum.TransportLoadingOrder);

                TransportLoadingOrder = new Models.Transport.TransportLoadingOrder
                {
                    OrderCity = _context.CodeTableCompanies.Single(x => x.IdCompany == user.IdCompanyFk).City,
                    OrderDate = DateTime.Now.Date,
                    PreText = string.Join("<br/>", prePostTexts.Where(x => x.Type == CodeTablePrePostTextLink.TypeEnum.PreText).Select(x => x.CodeTablePrePostText.Content)),
                    PostText = string.Join("<br/>", prePostTexts.Where(x => x.Type == CodeTablePrePostTextLink.TypeEnum.PostText).Select(x => x.CodeTablePrePostText.Content))
                };
                TransportLoadingOrderLoadUnload = new TransportLoadingOrderLoadUnload();

                return Page();
            }

            TransportLoadingOrder = await _context.TransportLoadingOrders
                .Include(t => t.Partner)
                .Include(t => t.Vehicle).FirstOrDefaultAsync(m => m.IdTransportLoadingOrder == id && m.IdCompanyFk == user.IdCompanyFk);

            TransportLoadingOrderLoadUnload = new TransportLoadingOrderLoadUnload();

            if (TransportLoadingOrder == null)
            {
                return NotFound();
            }


            return Page();
        }

        public async Task<IActionResult> OnPostOrderAsync()
        {
            var user = _userManager.GetUserAsync(User).Result;

            if (!ModelState.IsValid)
            {
                System.Diagnostics.Debug.WriteLine("OnPostOrderAsync:Invalid");
                //ViewData["IdPartnerFk"] = new SelectList(_context.CodeTablePartners.Where(x => x.IdCompanyFk == user.IdCompanyFk), "IdPartner", "Title");
                //SetVehiclesBag(user.IdCompanyFk);
                return new JsonResult(new { successful = false, error = string.Join(", ", ModelState.Values.Where(x => x.Errors.Any()).Select(x=> string.Join(", ", x.Errors.Select(y => y.ErrorMessage)))) });
            }

            if (TransportLoadingOrder.IdVehicleFk != null)
            {
                TransportLoadingOrder.VehicleText = "";
            }

            TransportLoadingOrder.PostText = TransportLoadingOrder.PostText.Replace("<div><br></div>", "");
            TransportLoadingOrder.PreText = TransportLoadingOrder.PreText.Replace("<div><br></div>", "");

            if (TransportLoadingOrder.IdTransportLoadingOrder > 0)
            {
                _context.Attach(TransportLoadingOrder).State = EntityState.Modified;

                try
                {
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!TransportLoadingOrderExists(TransportLoadingOrder.IdTransportLoadingOrder))
                    {
                        return NotFound();
                    }
                    else
                    {
                        throw;
                    }
                }

                TransportLoadingOrderLoadUnload = new TransportLoadingOrderLoadUnload();

                return new JsonResult(new { successful = true, id = TransportLoadingOrder.IdTransportLoadingOrder });
            }

            // OrderNumber and OrderYear

            var orderNumber = _context.TransportLoadingOrders.Where(x => x.IdCompanyFk == user.IdCompanyFk && x.OrderYear == DateTime.Now.Year).Max(x => x.OrderNumber) + 1;

            TransportLoadingOrder.IdCompanyFk = user.IdCompanyFk;
            TransportLoadingOrder.OrderYear = DateTime.Now.Year;
            TransportLoadingOrder.OrderNumber = orderNumber;

            _context.TransportLoadingOrders.Add(TransportLoadingOrder);
            await _context.SaveChangesAsync();


            return new JsonResult(new { successful = true, id = TransportLoadingOrder .IdTransportLoadingOrder});
        }

        public async Task<IActionResult> OnPostPositionAddAsync()
        {
            TransportLoadingOrderLoadUnload.IdTransportLoadingOrderFk = TransportLoadingOrder.IdTransportLoadingOrder;
            TransportLoadingOrderLoadUnload.CargoDescription = TransportLoadingOrderLoadUnload.CargoDescription.Replace("<div><br></div>", "");

            _context.TransportLoadingOrderLoadUnloads.Add(TransportLoadingOrderLoadUnload);
            await _context.SaveChangesAsync();

            return Page();
        }

        public async Task<IActionResult> OnGetPositionRemoveAsync(int idTransportLoadingOrder, int id)
        {
            var user = _userManager.GetUserAsync(User).Result;

            TransportLoadingOrder = await _context.TransportLoadingOrders
                .Include(t => t.Partner)
                .Include(t => t.Vehicle).FirstOrDefaultAsync(m => m.IdTransportLoadingOrder == idTransportLoadingOrder && m.IdCompanyFk == user.IdCompanyFk);

            TransportLoadingOrderLoadUnload = new TransportLoadingOrderLoadUnload();

            if (TransportLoadingOrder != null)
            {
                var transportLoadingOrderLoadUnload = await _context.TransportLoadingOrderLoadUnloads.FirstOrDefaultAsync(x => x.IdTransportLoadingOrderFk == TransportLoadingOrder.IdTransportLoadingOrder && x.IdTransportLoadingOrderLoadUnload == id);

                if (transportLoadingOrderLoadUnload != null)
                {
                    _context.TransportLoadingOrderLoadUnloads.Remove(transportLoadingOrderLoadUnload);

                    await _context.SaveChangesAsync();
                }

                return Page();
            }

            return NotFound();
        }

        public async Task<IActionResult> OnGetIndexLoadUnloadAsync(int id)
        {
            var user = _userManager.GetUserAsync(User).Result;

            var transportLoadingOrder = await _context.TransportLoadingOrders.FirstOrDefaultAsync(x => x.IdTransportLoadingOrder == id && x.IdCompanyFk == user.IdCompanyFk);

            if (transportLoadingOrder != null)
            {
                var transportLoadingOrderLoadUnloadList = await _context.TransportLoadingOrderLoadUnloads
                    .Where(x => x.IdTransportLoadingOrderFk == transportLoadingOrder.IdTransportLoadingOrder)
                    .Include(x => x.Loading)
                    .Include(x => x.Unloading).ToListAsync();

                return Partial("IndexLoadUnload", transportLoadingOrderLoadUnloadList);
            }

            return NotFound();
        }

        private bool TransportLoadingOrderExists(int id)
        {
            return _context.TransportLoadingOrders.Any(e => e.IdTransportLoadingOrder == id);
        }

        private void SetVehiclesBag(int idCompany)
        {
            Vehicles = new List<SelectListItem>
            {
                new ("Izberi vozilo", "")
            };
            Vehicles.AddRange(_context.Vehicles.Where(x => x.IdCompanyFk == idCompany).Select(x => new SelectListItem(x.DisplayName, x.IdVehicle.ToString())));
            //Vehicles = new SelectList(tmpList, "Text", "Value"); 
        }

        public IActionResult OnGetLoadingUnloadingText(int idPartner)
        {
            var user = _userManager.GetUserAsync(User).Result;

            var partner = _context.CodeTablePartners
                .Include(x => x.Country)
                .FirstOrDefault(x => x.IdCompanyFk == user.IdCompanyFk
                            && x.IdPartner == idPartner);

            return partner == null 
                ? new JsonResult(new { successful = false, error = $"Partner with ID: {idPartner} not exists!" }) 
                : new JsonResult(new { successful = true, text = $"{partner.Street} {partner.HouseNumber}\n{partner.PostNumber} {partner.Post}\n{partner.Country.Title}" });
        }
    }
}