using System;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Threading;
using gehGassi.Domain.Common;
using Microsoft.AspNetCore.Identity;
using Newtonsoft.Json;

namespace gehGassi.Domain.Users
{
    /// <summary>
    /// Repräsentiert einen Benutzer der Zugriff auf die Applikation hat
    /// </summary>
    public class ApplicationUser : IdentityUser, IAuditable
    {
        /// <summary>
        /// Benutzername überschrieben, damit hier eine E-Mail Adresse erzwungen werden kann
        /// </summary>
        [Required]
        [MaxLength(256)]
        [EmailAddress]
        public sealed override string UserName { get; set; }

        /// <summary>
        /// Vorname
        /// </summary>
        [Required]
        [MaxLength(150)]
        public string FirstName { get; set; }

        /// <summary>
        /// Nachname
        /// </summary>
        [Required]
        [MaxLength(150)]
        public string LastName { get; set; }

        /// <summary>
        /// Voller Name - Wird in Views verwendet
        /// </summary>
        [Required]
        [MaxLength(320)]
        public string FullName { get; set; }

        /// <summary>
        /// Id der Timzone (Zeitzone) in welcher der Benutzer sich befindet
        /// </summary>
        [MaxLength(50)]
        public string TimeZoneId { get; set; }

        /// <summary>
        /// Bevorzugte Sprache (ISO2)
        /// </summary>
        [MaxLength(2)]
        public string PreferredLanguage { get; set; }

        /// <summary>
        /// Optional - Foto des Benutzers
        /// </summary>
        [MaxLength(256)]
        public string Photo { get; set; }

        /// <summary>
        /// Datum der Registrierung
        /// </summary>
        public DateTimeOffset? RegistrationDate { get; set; }

        /// <summary>
        /// Datum der letzten Anmeldung
        /// </summary>
        public DateTimeOffset? LastLoginDate { get; set; }

        /// <summary>
        /// Vordefinierte Permissions als packed string.
        /// </summary>
        [MaxLength(500)]
        public string Permissions { get; set; }

        /// <summary>
        /// Id des Kunden
        /// null wenn keiner zugeordnet
        /// </summary>
        public long? CustomerId { get; set; }

        /// <summary>
        /// Id des App-Users
        /// null, wenn keiner zugeordnet
        /// </summary>
        [MaxLength(128)]
        public string AppUserId { get; set; }

        /// <summary>
        /// Benutzereinstellungen
        /// </summary>
        public string SettingsJson { get; set; }

        /// <summary>
        /// Benutzer-Einstellungen
        /// </summary>
        [NotMapped]
        public UserSettings Settings
        {
            get
            {
                if (string.IsNullOrWhiteSpace(SettingsJson))
                    return new UserSettings();
                var settings = JsonConvert.DeserializeObject<UserSettings>(SettingsJson);
                return settings;
            }
            set
            {
                var settings = JsonConvert.SerializeObject(value);
                SettingsJson = settings;
            }
        }

        /// <summary>
        /// Name für Lookup-Operationen
        /// </summary>
        [NotMapped]
        public string NameForLookup
        {
            get
            {
                if (!string.IsNullOrWhiteSpace(FirstName) && !string.IsNullOrWhiteSpace(LastName) && FirstName.Length > 1 && LastName.Length > 1)
                    return $"{FirstName} {LastName}";
                else if (!string.IsNullOrWhiteSpace(FirstName) && FirstName.Length > 1 && string.IsNullOrWhiteSpace(LastName))
                    return FirstName;
                else if (string.IsNullOrWhiteSpace(FirstName) && !string.IsNullOrWhiteSpace(LastName) && LastName.Length > 1)
                    return LastName;
                else
                    return UserName;
            }
        }

        /// <summary>
        /// Erstellt eine Isntanz
        /// </summary>
        public ApplicationUser() { }

        /// <summary>
        /// Erstellt eine Instanz
        /// </summary>
        /// <param name="userName">Benutzername</param>
        /// <param name="firstName">Vorname</param>
        /// <param name="lastName">Nachname</param>
        public ApplicationUser(string userName, string firstName, string lastName)
        {
            UserName = userName;
            FirstName = firstName;
            LastName = lastName;
            RegistrationDate = DateTimeOffset.UtcNow;
            LastLoginDate = null;
            TimeZoneId = TimeZoneInfo.Local.Id;
            PreferredLanguage = Thread.CurrentThread.CurrentCulture.TwoLetterISOLanguageName;
            Photo = string.Empty;
        }

        /// <summary>
        /// Erstellt eine Instanz
        /// </summary>
        /// <param name="userName">Benutzername</param>
        /// <param name="firstName">Vorname</param>
        /// <param name="lastName">Nachname</param>
        /// <param name="timeZoneId">Zeitzone</param>
        /// <param name="preferredLanguage">Standard-Sprache</param>
        public ApplicationUser(string userName, string firstName, string lastName, string timeZoneId, string preferredLanguage) : this(userName, firstName, lastName)
        {
            TimeZoneId = timeZoneId;
            PreferredLanguage = preferredLanguage;
        }

        #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 "AspNetUsers";
        }

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

        #endregion
    }

    /// <summary>
    /// Hilfsklasse für Benutzer-Einstellungen. Wird als Json gespeichert
    /// </summary>
    public class UserSettings
    {
        /// <summary>
        /// Soll das Nav-Menü angezeigt werden?
        /// </summary>
        [JsonProperty("sidebarShow")]
        public bool SidebarShow { get; set; }

        /// <summary>
        /// Ist das Nav-Menü minimiert?
        /// </summary>
        [JsonProperty("sidebarMinimized")]
        public bool SidebarMinimized { get; set; }

        /// <summary>
        /// Gibt an ob Fido2 für den Benutzer aktiviert ist - zumindest 1 Provider.
        /// Bedeutet die Möglichkeit für Login ohne Passwort
        /// </summary>
        [JsonProperty("fido2Active")]
        public bool Fido2Active { get; set; }

        /// <summary>
        /// Id des zuletzt gewählten Kunden
        /// </summary>
        [JsonProperty("selectedCustomerId")]
        public long? SelectedCustomerId { get; set; }

        /// <summary>
        /// Id des zuletzt gewählten App-Users
        /// </summary>
        [JsonProperty("selectedAppUserId")]
        public string SelectedAppUserId { get; set; }

        /// <summary>
        /// Erstellt eine Instanz
        /// </summary>
        public UserSettings()
        {
            SidebarShow = true;
            SidebarMinimized = false;
            Fido2Active = false;
        }
    }

    /// <summary>
    /// Repräsentiert einen Benutzer mit aufgelösten Namen für View
    /// </summary>
    public class ApplicationUserWithNames
    {
        /// <summary>
        /// Id
        /// </summary>
        [Required]
        public string Id { get; set; }

        /// <summary>
        /// Benutzername überschrieben, damit hier eine E-Mail Adresse erzwungen werden kann
        /// </summary>
        [Required]
        [MaxLength(256)]
        [EmailAddress]
        public string UserName { get; set; }

        /// <summary>
        /// Vorname
        /// </summary>
        [Required]
        [MaxLength(150)]
        public string FirstName { get; set; }

        /// <summary>
        /// Nachname
        /// </summary>
        [Required]
        [MaxLength(150)]
        public string LastName { get; set; }

        /// <summary>
        /// Id der Timzone (Zeitzone) in welcher der Benutzer sich befindet
        /// </summary>
        [MaxLength(50)]
        public string TimeZoneId { get; set; }

        /// <summary>
        /// Bevorzugte Sprache (ISO2)
        /// </summary>
        [MaxLength(2)]
        public string PreferredLanguage { get; set; }

        /// <summary>
        /// Optional - Foto des Benutzers
        /// </summary>
        [MaxLength(256)]
        public string Photo { get; set; }

        /// <summary>
        /// Datum der Registrierung
        /// </summary>
        public DateTimeOffset? RegistrationDate { get; set; }

        /// <summary>
        /// Datum der letzten Anmeldung
        /// </summary>
        public DateTimeOffset? LastLoginDate { get; set; }

        /// <summary>
        /// Vordefinierte Permissions als packed string.
        /// </summary>
        [MaxLength(500)]
        public string Permissions { get; set; }

        /// <summary>
        /// Id des Kunden
        /// null wenn keiner zugeordnet
        /// </summary>
        public long? CustomerId { get; set; }

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

        /// <summary>
        /// Id des App-Users
        /// null, wenn keiner zugeordnet
        /// </summary>
        public string AppUserId { get; set; }

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

        /// <summary>
        /// 2-Faktor Authentifizierung aktiviert?
        /// </summary>
        public bool TwoFactorEnabled { get; set; }

        /// <summary>
        /// Email-Adresse bestätigt?
        /// </summary>
        public bool EmailConfirmed { get; set; }



        /// <summary>
        /// Name für Lookup-Operationen
        /// </summary>
        [NotMapped]
        public string NameForLookup
        {
            get
            {
                if (!string.IsNullOrWhiteSpace(FirstName) && !string.IsNullOrWhiteSpace(LastName) && FirstName.Length > 1 && LastName.Length > 1)
                    return FirstName + " " + LastName;
                else if (!string.IsNullOrWhiteSpace(FirstName) && FirstName.Length > 1 && string.IsNullOrWhiteSpace(LastName))
                    return FirstName;
                else if (string.IsNullOrWhiteSpace(FirstName) && !string.IsNullOrWhiteSpace(LastName) && LastName.Length > 1)
                    return LastName;
                else
                    return UserName;
            }
        }
    }
}