using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using gehGassi.Domain.Common;
using gehGassi.Domain.Localization;
using gehGassi.Web.Helper;

namespace gehGassi.Web.Models
{
    /// <summary>
    /// Viewmodel für eine Produkt-Kategorie
    /// </summary>
    public class ProductCategoryVm
    {
        /// <summary>
        /// Eindeutige Id
        /// </summary>
        [Required(ErrorMessage = "Err_Required")]
        public int Id { get; set; }

        /// <summary>
        /// Id der Übergeordneten Kategorie
        /// </summary>
        [Display(Name = "ProductCategory_ParentId")]
        public int? ParentId { get; set; }

        /// <summary>
        /// Für wen sichtbar?
        /// </summary>
        [Required(ErrorMessage = "Err_Required")]
        [Display(Name = "Product_Visibility", Description = "Product_Visibility_Desc")]
        public ShopVisibilityVm Visibility { get; set; }

        /// <summary>
        /// Titel der Kategorie
        /// </summary>
        [Required(ErrorMessage = "Err_Required")]
        [MaxLength(100, ErrorMessage = "Err_StringLength_Max")]
        [Display(Name = "ProductCategory_Title")]
        public string Title { get; set; }

        /// <summary>
        /// Anmerkungen intern
        /// </summary>
        [Display(Name = "Common_Comment")]
        public string Comment { get; set; }

        /// <summary>
        /// Reihenfolge der Darstellung, danach nach Name
        /// </summary>
        [Required(ErrorMessage = "Err_Required")]
        [Display(Name = "Common_DisplayOrder", Description = "Common_DisplayOrder_Desc")]
        public int DisplayOrder { get; set; }

        /// <summary>
        /// Bild für die Produktkategorie - Allgemein
        /// </summary>
        [Required(ErrorMessage = "Err_Required")]
        [MaxLength(500, ErrorMessage = "Err_StringLength_Max")]
        [Display(Name = "ProductCategory_Image")]
        public string Image { get; set; }

        /// <summary>
        /// Gelöscht
        /// </summary>
        [Required(ErrorMessage = "Err_Required")]
        [Display(Name = "Common_Deleted")]
        public bool Deleted { get; set; }

        /// <summary>
        /// Datum der Erstellung
        /// </summary>
        [Display(Name = "Common_Created")]
        public DateTimeOffset Created { get; set; }

        /// <summary>
        /// Texte mehrsprachig
        /// </summary>
        public List<ProductCategoryTextVm> TextVms { get; set; }
    }

    /// <summary>
    /// Viewmodel für das Anlegen / Bearbeiten einer Produktkategorie
    /// </summary>
    public class ProductCategoryCrudVm : ProductCategoryVm
    {
        /// <summary>
        /// Titel der übergeordneten Produktkategorie
        /// </summary>
        [Display(Name = "ProductCategory_ParentId")]
        public string ParentTitle { get; set; }
    }

    /// <summary>
    /// Hilfsklasse für das Erfassen Mehrsprachiger Texte für Produktkategorien.
    /// Wird so gelöst, damit beliebig viele Sprachen verwendet werden können
    /// </summary>
    public class ProductCategoryTextVm
    {
        /// <summary>
        /// Id
        /// </summary>
        [Required(ErrorMessage = "Err_Required")]
        public int Id { get; set; }

        /// <summary>
        /// Srache
        /// </summary>
        [Required(ErrorMessage = "Err_Required")]
        public string Language { get; set; }

        /// <summary>
        /// Name
        /// </summary>
        //[Required(ErrorMessage = "Err_Required")]
        [RequiredIfDefaultLanguage("Language", ErrorMessage = "Err_Required")]
        [MaxLength(100, ErrorMessage = "Err_StringLength_Max")]
        [Display(Name = "ProductCategory_Name", Description = "ProductCategory_Name_Desc")]
        public string Name { get; set; }

        /// <summary>
        /// Beschreibung
        /// </summary>
        [Display(Name = "ProductCategory_Description", Description = "ProductCategoryDescription_Desc")]
        public string Description { get; set; }

        /// <summary>
        /// Bild für die jeweilige Sprache
        /// </summary>
        [Display(Name = "ProductCategory_ImageLanguage", Description = "ProductCategory_ImageLanguage_Desc")]
        public string ImageLanguage { get; set; }
    }

    /// <summary>
    /// Viewmodel für die Listendarstellung von Produkategorien
    /// </summary>
    public class ProductCategoryListVm : LocalizableBase
    {
        /// <summary>
        /// Eindeutige Id
        /// </summary>
        public int Id { get; set; }

        /// <summary>
        /// Id der Übergeordneten Kategorie
        /// </summary>
        public int? ParentId { get; set; }

        /// <summary>
        /// Für wen sichtbar?
        /// </summary>
        public ShopVisibilityVm Visibility { get; set; }

        /// <summary>
        /// Übersetzung der Shop-Visibility
        /// </summary>
        public string ShopVisibilityText { get; set; }

        /// <summary>
        /// Titel der Kategorie
        /// </summary>
        public string Title { get; set; }

        /// <summary>
        /// Reihenfolge der Darstellung, danach nach Name
        /// </summary>
        public int DisplayOrder { get; set; }

        /// <summary>
        /// Bild für die Produktkategorie - Allgemein
        /// </summary>
        public string Image { get; set; }

        /// <summary>
        /// Name der Rubrik
        /// </summary>
        public string Name
        {
            get => Get("Name", GetLanguage());
            set => Set("Name", GetLanguage(), value);
        }

        /// <summary>
        /// Übersetzungen Name
        /// </summary>
        public string NameLocalized { get; set; }

        /// <summary>
        /// Gelöscht
        /// </summary>
        public bool Deleted { get; set; }

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

        /// <summary>
        /// Gibt an ob der Knoten Kinder hat
        /// </summary>
        public bool HasChildren { get; set; }
    }

    /// <summary>
    /// Viewmodel für die Baumdarstellung von Produkategorien
    /// </summary>
    public class ProductCategoryTreeVm : LocalizableBase
    {
        /// <summary>
        /// Eindeutige Id
        /// </summary>
        public int Id { get; set; }

        /// <summary>
        /// Id der Übergeordneten Kategorie
        /// </summary>
        public int? ParentId { get; set; }

        /// <summary>
        /// Für wen sichtbar?
        /// </summary>
        public ShopVisibilityVm Visibility { get; set; }

        /// <summary>
        /// Übersetzung der Shop-Visibility
        /// </summary>
        public string ShopVisibilityText { get; set; }

        /// <summary>
        /// Titel der Kategorie
        /// </summary>
        public string Title { get; set; }

        /// <summary>
        /// Reihenfolge der Darstellung, danach nach Name
        /// </summary>
        public int DisplayOrder { get; set; }

        /// <summary>
        /// Bild für die Produktkategorie - Allgemein
        /// </summary>
        public string Image { get; set; }

        /// <summary>
        /// Name der Kategorie
        /// </summary>
        public string Name
        {
            get => Get("Name", GetLanguage());
            set => Set("Name", GetLanguage(), value);
        }

        /// <summary>
        /// Übersetzungen Name
        /// </summary>
        public string NameLocalized { get; set; }

        /// <summary>
        /// Gelöscht
        /// </summary>
        public bool Deleted { get; set; }

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

        /// <summary>
        /// Untergeordnete Kategorien
        /// </summary>
        public List<ProductCategoryTreeVm> Children { get; set; }

        /// <summary>
        /// Gibt an ob ein Element Kinder hat
        /// </summary>
        public bool HasChildren => Children.Count > 0;

        /// <summary>
        /// Erstellt eine Instanz
        /// </summary>
        public ProductCategoryTreeVm()
        {
            Children = new List<ProductCategoryTreeVm>();
        }
    }
}