using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using gehGassi.Domain.Common;
using gehGassi.Domain.Users;
using Newtonsoft.Json;

namespace gehGassi.Domain.Shop
{
    /// <summary>
    /// Repräsentiert einen Warenkorb
    /// </summary>
    public class Cart : IAuditable
    {
        /// <summary>
        /// Id des Warenkorbs
        /// </summary>
        [Key]
        [Required]
        public long Id { get; set; }

        /// <summary>
        /// Welcher "Kunden-Typ" hat die Bestellung erstellt?
        /// </summary>
        [Required]
        public OrderSource OrderSource { get; set; }

        /// <summary>
        /// Id des App-Users
        /// </summary>
        public string AppUserId { get; set; }

        /// <summary>
        /// Kunde
        /// </summary>
        public long? CustomerId { get; set; }

        /// <summary>
        /// Gesamt-Preis Netto
        /// </summary>
        [Required]
        public decimal Total { get; set; }

        /// <summary>
        /// Gesamt-Preis Brutto
        /// </summary>
        [Required]
        public decimal TotalGross { get; set; }

        /// <summary>
        /// Versandkosten Netto
        /// </summary>
        [Required]
        public decimal Shipment { get; set; }

        /// <summary>
        /// Versandkosten Brutto
        /// </summary>
        [Required]
        public decimal ShipmentGross { get; set; }

        /// <summary>
        /// Steuerstufen mit Werten als Json
        /// </summary>
        public string TaxRatesJson { get; set; }

        /// <summary>
        /// Steuer-Einstellungen
        /// </summary>
        [NotMapped]
        public Dictionary<decimal, decimal> TaxRates
        {
            get
            {
                if (string.IsNullOrWhiteSpace(TaxRatesJson))
                    return new Dictionary<decimal, decimal>();
                var taxRates = JsonConvert.DeserializeObject<Dictionary<decimal,decimal>>(TaxRatesJson, new JsonSerializerSettings(){Culture = CultureInfo.CurrentCulture});
                return taxRates;
            }
            set
            {
                var settings = JsonConvert.SerializeObject(value, new JsonSerializerSettings(){Culture = CultureInfo.InvariantCulture });
                TaxRatesJson = settings;
            }
        }

        /// <summary>
        /// Rechnungsland ISO2
        /// </summary>
        [Required]
        [MaxLength(2)]
        public string BillingCountryCode { get; set; }

        /// <summary>
        /// Lieferland ISO2
        /// </summary>
        [Required]
        [MaxLength(2)]
        public string DeliveryCountryCode { get; set; }

        /// <summary>
        /// Datum der Erstellung
        /// </summary>
        [Required]
        public DateTimeOffset Created { get; set; }

        /// <summary>
        /// Datum der letzten Änderung
        /// </summary>
        public DateTimeOffset? LastUpdate { get; set; }

        #region IAuditable
        /// <summary>
        /// Gibt den eindeutigen Key für die Entität zurück;
        /// Hier als String gelöst, weil damit auch kombinierte Schlüssel möglich sind.
        /// </summary>
        /// <returns>Eindeutiger Key</returns>
        public string AuditKey()
        {
            return Id.ToString();
        }

        /// <summary>
        /// Gibt den Objektnamen bzw. die Tabelle der Entität zurück
        /// </summary>
        /// <returns>Objektnamen</returns>
        public string AuditTable()
        {
            return "Carts";
        }

        public AuditableOptions Options()
        {
            return AuditableOptions.Create | AuditableOptions.Edit | AuditableOptions.Delete;
        }

        #endregion
    }

    /// <summary>
    /// Repräsentiert einen Warenkorb - Liste
    /// </summary>
    public class CartWithNames
    {
        /// <summary>
        /// Id des Warenkorbs
        /// </summary>
        public long Id { get; set; }

        /// <summary>
        /// Welcher "Kunden-Typ" hat die Bestellung erstellt?
        /// </summary>
        public OrderSource OrderSource { get; set; }

        /// <summary>
        /// Id des App-Users
        /// </summary>
        public string AppUserId { get; set; }

        /// <summary>
        /// Name des App-Users
        /// </summary>
        public string AppUserName { get; set; }

        /// <summary>
        /// Kunde
        /// </summary>
        public long? CustomerId { get; set; }

        /// <summary>
        /// Name des Kunden
        /// </summary>
        public string CustomerName { get; set; }

        /// <summary>
        /// Gesamt-Preis Netto
        /// </summary>
        [Required]
        public decimal Total { get; set; }

        /// <summary>
        /// Gesamt-Preis Brutto
        /// </summary>
        [Required]
        public decimal TotalGross { get; set; }

        /// <summary>
        /// Versandkosten Netto
        /// </summary>
        [Required]
        public decimal Shipment { get; set; }

        /// <summary>
        /// Versandkosten Brutto
        /// </summary>
        [Required]
        public decimal ShipmentGross { get; set; }

        /// <summary>
        /// Steuerstufen mit Werten als Json
        /// </summary>
        public string TaxRatesJson { get; set; }

        /// <summary>
        /// Steuer-Einstellungen
        /// </summary>
        [NotMapped]
        public Dictionary<decimal, decimal> TaxRates
        {
            get
            {
                if (string.IsNullOrWhiteSpace(TaxRatesJson))
                    return new Dictionary<decimal, decimal>();
                var taxRates = JsonConvert.DeserializeObject<Dictionary<decimal, decimal>>(TaxRatesJson, new JsonSerializerSettings() { Culture = CultureInfo.CurrentCulture });
                return taxRates;
            }
            set
            {
                var settings = JsonConvert.SerializeObject(value, new JsonSerializerSettings() { Culture = CultureInfo.InvariantCulture });
                TaxRatesJson = settings;
            }
        }

        /// <summary>
        /// Rechnungsland ISO2
        /// </summary>
        public string BillingCountryCode { get; set; }

        /// <summary>
        /// Lieferland ISO2
        /// </summary>
        public string DeliveryCountryCode { get; set; }

        /// <summary>
        /// Datum der Erstellung
        /// </summary>
        public DateTimeOffset Created { get; set; }

        /// <summary>
        /// Datum der letzten Änderung
        /// </summary>
        public DateTimeOffset? LastUpdate { get; set; }

        /// <summary>
        /// Anzahl der Artikel im Warenkorb.
        /// Achtung: Summe der Quantity aller Artikel!
        /// </summary>
        public int ItemCount { get; set; }
    }

    /// <summary>
    /// Repräsentiert einen Artikel im Warenkorb
    /// </summary>
    public class CartItem : IAuditable
    {
        /// <summary>
        /// Id des Warenkorb-Items
        /// </summary>
        [Key]
        [Required]
        public long Id { get; set; }

        /// <summary>
        /// Id des Warenkorbs
        /// </summary>
        [Required]
        public long CartId { get; set; }

        /// <summary>
        /// Id des Artikels
        /// </summary>
        [Required]
        public int ProductId { get; set; }

        /// <summary>
        /// Typ
        /// </summary>
        [Required]
        public ProductType ProductType { get; set; }

        /// <summary>
        /// Id einer Listung, Werbung, Banner, Pin im Draft-Mode
        /// </summary>
        [MaxLength(128)]
        public string ItemId { get; set; }

        /// <summary>
        /// Stückzahl
        /// </summary>
        [Required]
        public int Quantity { get; set; }

        /// <summary>
        /// Preis des Produktes netto
        /// </summary>
        [Required]
        public decimal Price { get; set; }

        /// <summary>
        /// Preis des Produktes brutto
        /// </summary>
        [Required]
        public decimal PriceGross { get; set; }

        /// <summary>
        /// Preis des Produktes netto für Produkte die 2 Preise benötigen
        /// </summary>
        [Required]
        public decimal Price2 { get; set; }

        /// <summary>
        /// Preis des Produktes brutto für Produkte die 2 Preise benötigen
        /// </summary>
        [Required]
        public decimal Price2Gross { get; set; }

        /// <summary>
        /// Gesamt-Preis Netto
        /// </summary>
        [Required]
        public decimal Total { get; set; }

        /// <summary>
        /// Gesamt-Preis Brutto
        /// </summary>
        [Required]
        public decimal TotalGross { get; set; }

        /// <summary>
        /// Angewandte Steuer - also z.B. 10%, 20%
        /// </summary>
        [Required]
        public decimal TaxRate { get; set; }

        /// <summary>
        /// Errechneter Steuerbetrag - mit Berücksichtigung der Stückzahl
        /// </summary>
        [Required]
        public decimal TaxRateValue { get; set; }

        /// <summary>
        /// Datum der Erstellung
        /// </summary>
        [Required]
        public DateTimeOffset Created { get; set; }

        /// <summary>
        /// Datum der letzten Änderung
        /// </summary>
        public DateTimeOffset? LastUpdate { get; set; }

        #region IAuditable
        /// <summary>
        /// Gibt den eindeutigen Key für die Entität zurück;
        /// Hier als String gelöst, weil damit auch kombinierte Schlüssel möglich sind.
        /// </summary>
        /// <returns>Eindeutiger Key</returns>
        public string AuditKey()
        {
            return Id.ToString();
        }

        /// <summary>
        /// Gibt den Objektnamen bzw. die Tabelle der Entität zurück
        /// </summary>
        /// <returns>Objektnamen</returns>
        public string AuditTable()
        {
            return "CartItems";
        }

        public AuditableOptions Options()
        {
            return AuditableOptions.Create | AuditableOptions.Edit | AuditableOptions.Delete;
        }

        #endregion
    }

    /// <summary>
    /// Repräsentiert einen Artikel im Warenkorb - Liste
    /// </summary>
    public class CartItemWithNames
    {
        /// <summary>
        /// Id des Warenkorb-Items
        /// </summary>
        public long Id { get; set; }

        /// <summary>
        /// Id des Warenkorbs
        /// </summary>
        public long CartId { get; set; }

        /// <summary>
        /// Id des Artikels
        /// </summary>
        public int ProductId { get; set; }

        /// <summary>
        /// Name des Produktes
        /// </summary>
        public string ProductName { get; set; }

        /// <summary>
        /// Artikelnummer des Produktes
        /// </summary>
        public string ProductSku { get; set; }

        /// <summary>
        /// Bild des Produktes - entweder basierend auf Sprache oder das allgemeine Bild
        /// </summary>
        public string ProductImage { get; set; }

        /// <summary>
        /// Typ
        /// </summary>
        public ProductType ProductType { get; set; }

        /// <summary>
        /// Stückzahl
        /// </summary>
        public int Quantity { get; set; }

        /// <summary>
        /// Preis des Produktes netto
        /// </summary>
        public decimal Price { get; set; }

        /// <summary>
        /// Preis des Produktes brutto
        /// </summary>
        public decimal PriceGross { get; set; }

        /// <summary>
        /// Preis des Produktes netto für Produkte die 2 Preise benötigen
        /// </summary>
        public decimal Price2 { get; set; }

        /// <summary>
        /// Preis des Produktes brutto für Produkte die 2 Preise benötigen
        /// </summary>
        public decimal Price2Gross { get; set; }

        /// <summary>
        /// Gesamt-Preis Netto
        /// </summary>
        public decimal Total { get; set; }

        /// <summary>
        /// Gesamt-Preis Brutto
        /// </summary>
        public decimal TotalGross { get; set; }

        /// <summary>
        /// Angewandte Steuer - also z.B. 10%, 20%
        /// </summary>
        public decimal TaxRate { get; set; }

        /// <summary>
        /// Errechneter Steuerbetrag - mit Berücksichtigung der Stückzahl
        /// </summary>
        public decimal TaxRateValue { get; set; }

        /// <summary>
        /// Wie viele Produkte müssen mindestens bestellt werden?
        /// </summary>
        public int OrderMinimumQuantity { get; set; }

        /// <summary>
        /// Wie viele Produkte dürfen maximal bestellt werden?
        /// </summary>
        public int OrderMaximumQuantity { get; set; }

        /// <summary>
        /// Datum der Erstellung
        /// </summary>
        public DateTimeOffset Created { get; set; }

        /// <summary>
        /// Datum der letzten Änderung
        /// </summary>
        public DateTimeOffset? LastUpdate { get; set; }
    }
}