using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.EntityFrameworkCore;
using EveryThing.Data;
using EveryThing.Models;
using EveryThing.Models.Invoice;
using EveryThing.Models.Transport;
using DocumentFormat.OpenXml.Wordprocessing;
using System.ComponentModel.DataAnnotations;

namespace EveryThing.Pages.Invoices
{
    [Authorize(Roles = "Administrator,InvoicingUser,ProjecThingUser")]
    public class PrintModel : PageModel
    {
        public class PrintTranslation
        {
            public string Email { get; set; } = "E-pošta";
            public string Telephone { get; set; } = "Tel.";
            public string IdTax { get; set; } = "ID za DDV";
            public string Iban { get; set; } = "IBAN";
            public string SwiftBic { get; set; } = "SWIFT/BIC";
            public string InvoiceType { get; set; } = "Faktura";
            public string Number { get; set; } = "št.";
            public string Date { get; set; } = "Datum";
            public string OrderNumber { get; set; } = "Številka naročila";
            public string DeliveryNote { get; set; } = "Številka dobavnice:";
            public string DeliveryTime { get; set; } = "Dobavni rok";
            public string DateOfDispatch { get; set; } = "Datum odpreme";
            public string Article { get; set; } = "Artikel";
            public string Quantity { get; set; } = "Količina";
            public string Price { get; set; } = "Cena";
            public string Amount { get; set; } = "Znesek";
            public string Dimensions { get; set; } = "Dimenzije";
            public string Total { get; set; } = "Skupaj";
            public string Director { get; set; } = "Direktor";
            public string Project { get; set; } = "Projekt";
            public string Issued { get; set; } = "Izdal:";
            public string Received { get; set; } = "Prejel:";
        }

        public enum PrintTranslationLanguage
        {
            [Display(Name = "Slovensko")]
            Slovenian = 1,
            [Display(Name = "Nemško")]
            German = 2
        }

        private readonly ApplicationDbContext _context;
        private readonly UserManager<IdentityApplicationUser> _userManager;

        public Models.Invoice.Invoice Invoice { get; set; }
        public PrintTranslation Translation { get; set; }
        public IList<Models.Invoice.InvoiceItem> InvoiceItems { get; set; }
        public string ProjectNumber { get; set; }

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

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

            Invoice = await _context.Invoices
                .Include(x => x.Company)
                .Include(x => x.Company.Country)
                .Include(x => x.Partner)
                .Include(x => x.Partner.Country)
                .FirstOrDefaultAsync(x => x.IdInvoice == id && x.IdCompanyFk == user.IdCompanyFk);

            if (Invoice != null)
            {
                InvoiceItems = await _context.InvoiceItems
                    .Where(x => x.IdInvoiceFk == Invoice.IdInvoice)
                    .Include(x => x.Item)
                    .Include(x => x.InvoiceItemJoin)
                        .ThenInclude(x => x.Invoice)
                    .ToListAsync();


                var translationLanguage = PrintTranslationLanguage.Slovenian;
                if (printTranslationLanguage != null)
                    translationLanguage = (PrintTranslationLanguage)printTranslationLanguage;

                SetTranslation(translationLanguage, Invoice.State);

                return Page();
            }

            return NotFound();
        }

        public IActionResult OnPostConfirmInvoice(int idInvoice)
        {
            var user = _userManager.GetUserAsync(User).Result;
            bool successful = true;
            string error = "";

            var invoice = _context.Invoices
                .Where(x => x.IdCompanyFk == user.IdCompanyFk)
                .FirstOrDefault(x => x.IdInvoice == idInvoice);

            if (invoice != null)
            {
                invoice.State = Models.Invoice.Invoice.InvoiceState.Confirmed;

                _context.SaveChanges();
            }
            else
            {
                successful = false;
                error = $"Invoice with ID: {idInvoice} not found";
            }
            

            return new JsonResult(new { idInvoice = idInvoice, error = error, successful = successful });
        }

        private void SetTranslation(PrintTranslationLanguage printTranslationLanguage, Invoice.InvoiceState invoiceState)
        {
            Translation = new PrintTranslation();

            switch (printTranslationLanguage)
            {
                case PrintTranslationLanguage.Slovenian:
                    switch(Invoice.Type)
                    {
                        case Invoice.InvoiceType.Order:
                        case Invoice.InvoiceType.BuyersOrder:
                        if (Invoice.State == Invoice.InvoiceState.Offer)
                        {
                            Translation.InvoiceType = "Ponudba";
                        }
                        else if (Invoice.State == Invoice.InvoiceState.Inquiry)
                        {
                            Translation.InvoiceType = "Povpraševanje";
                        }
                        else if (Invoice.State == Invoice.InvoiceState.OfferConfirmation)
                        {
                            Translation.InvoiceType = "Potrditev naročila";
                        }
                        else
                        {
                            Translation.InvoiceType = "Naročilo";
                        }
                        break;
                        case Invoice.InvoiceType.Invoice:
                            Translation.InvoiceType = "Račun";
                            break;
                        case Invoice.InvoiceType.DeliveryNote:
                            Translation.InvoiceType = "Dobavnica";
                            break;
                        default:
                            Translation.InvoiceType = "Faktura";
                            break;
                    }

                    if (invoiceState == Invoice.InvoiceState.Offer)
                        Translation.OrderNumber = "Št. povpraševanja.";
                    break;
                case PrintTranslationLanguage.German:
                    Translation = new PrintTranslation
                    {
                        Amount = "Menge",
                        Article = "Artikel",
                        Date = "Datum",
                        DateOfDispatch = "Lieferdatum",
                        DeliveryTime = "Lieferdatum",
                        Dimensions = "Maße",
                        Director = "Direktor",
                        Email = "Email",
                        Iban = "IBAN",
                        IdTax = "Ihre UID Nr.",
                        Number = "Num.",
                        OrderNumber = invoiceState == Invoice.InvoiceState.Offer ? "Anfrage No." : "Bestellnummer",
                        Price = "Preis(€)",
                        Quantity = "Menge(Stk)",
                        SwiftBic = "SWIFT/BIC",
                        Total = "Gesamtsumme",
                        Project = "Projekt",
                        Issued = "Bearbeiter:",
                        Received = "Empfänger:",
                        DeliveryNote = "Lieferschein:"
                    };
                    switch (Invoice.Type)
                    {
                        case Invoice.InvoiceType.Order:
                        case Invoice.InvoiceType.BuyersOrder:
                            if (Invoice.State == Invoice.InvoiceState.Offer)
                            {
                                Translation.InvoiceType = "Angebot";
                            }
                            else if (Invoice.State == Invoice.InvoiceState.Inquiry)
                            {
                                Translation.InvoiceType = "Anfrage";
                            }
                            else if (Invoice.State == Invoice.InvoiceState.OfferConfirmation)
                            {
                                Translation.InvoiceType = "Auftragsbestätigung";
                            }
                            else
                            {
                                Translation.InvoiceType = "Bestellung";
                            }
                            break;
                        case Invoice.InvoiceType.Invoice:
                            Translation.InvoiceType = "Rechnung";
                            break;
                        case Invoice.InvoiceType.DeliveryNote:
                            Translation.InvoiceType = "Lieferschein";
                            break;
                        default:
                            Translation.InvoiceType = "Faktura";
                            break;
                    }
                    break;
            }
        }
    }
}