using System;
using System.Collections;
using System.DirectoryServices;
using System.DirectoryServices.AccountManagement;

namespace Xylem.Common.Utils.UserAccessCtrl
{
    public class LDAPUser
    {
        public LDAPUser()
            => InitializeLDAPUser();

        public Int32 EmployeeId { get; private set; }

        public String FirstName { get; set; }

        public String LastName { get; set; }

        public String Phone { get; set; }

        public String Email { get; set; }

        public String Username { get; set; }

        public String DomainName { get; private set; }
        
        public String Password { get; set; }

        public String ConfirmPassword { get; set; }

        public Boolean Found { get; private set; }

        private void InitializeLDAPUser()
        {
            try
            {
                var currentUser = UserPrincipal.Current;

                using (var directoryEntry = new DirectoryEntry($"LDAP://{currentUser.DistinguishedName}"))
                {
                    using (var directorySearcher = new DirectorySearcher(directoryEntry))
                    {
                        var searchResult = directorySearcher.FindOne();

                        foreach (DictionaryEntry dictionaryEntry in searchResult.Properties)
                        {
                            if (dictionaryEntry.Key is String property)
                            {
                                if (property.Equals("employeeid", StringComparison.OrdinalIgnoreCase))
                                {
                                    if (dictionaryEntry.Value is ResultPropertyValueCollection dictionaryEntryValues)
                                    {
                                        if (dictionaryEntryValues.Count > 0 && dictionaryEntryValues[0] is String value)
                                        {
                                            if (int.TryParse(value, out Int32 employeeId))
                                            {
                                                EmployeeId = employeeId;
                                            }
                                        }
                                    }
                                }
                                else if (property.Equals("givenname", StringComparison.OrdinalIgnoreCase))
                                {
                                    if (dictionaryEntry.Value is ResultPropertyValueCollection dictionaryEntryValues)
                                    {
                                        if (dictionaryEntryValues.Count > 0 && dictionaryEntryValues[0] is String firstName)
                                        {
                                            FirstName = firstName;
                                        }
                                    }
                                }
                                else if (property.Equals("sn", StringComparison.OrdinalIgnoreCase))
                                {
                                    if (dictionaryEntry.Value is ResultPropertyValueCollection dictionaryEntryValues)
                                    {
                                        if (dictionaryEntryValues.Count > 0 && dictionaryEntryValues[0] is String lastName)
                                        {
                                            LastName = lastName;
                                        }
                                    }
                                }
                                else if (property.Equals("mail", StringComparison.OrdinalIgnoreCase))
                                {
                                    if (dictionaryEntry.Value is ResultPropertyValueCollection dictionaryEntryValues)
                                    {
                                        if (dictionaryEntryValues.Count > 0 && dictionaryEntryValues[0] is String email)
                                        {
                                            Email = email;
                                        }
                                    }
                                }
                                else if (property.Equals("telephonenumber", StringComparison.OrdinalIgnoreCase))
                                {
                                    if (dictionaryEntry.Value is ResultPropertyValueCollection dictionaryEntryValues)
                                    {
                                        if (dictionaryEntryValues.Count > 0 && dictionaryEntryValues[0] is String phone)
                                        {
                                            Phone = phone;
                                        }
                                    }
                                }
                                else if (property.Equals("samaccountname", StringComparison.OrdinalIgnoreCase))
                                {
                                    if (dictionaryEntry.Value is ResultPropertyValueCollection dictionaryEntryValues)
                                    {
                                        if (dictionaryEntryValues.Count > 0 && dictionaryEntryValues[0] is String username)
                                        {
                                            DomainName = username.ToLower();
                                            Username = DomainName;
                                        }
                                    }
                                }

                                Found = EmployeeId > 0;
                            }
                        }
                    }
                }
            }
            catch (Exception)
            {

            }
        }
    }
}