///
/// Copyright (c) 2017 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.Windows.Forms;
using NHibernate;
using Users.Entities;
using Users.Resources;


namespace Users.Forms
{
    public partial class UserManagementDlg: Form
    {
        public string TitleExtension;
        
        NHibernate.ISession session;
        bool showExtensions;
        IList<User> ListOfUsers;
        int LastSelectedIndex;

        public UserManagementDlg(bool showLocalExtensions)
        {
            InitializeComponent();
            this.showExtensions = showLocalExtensions;
            if (showLocalExtensions) copyFromRemoteButton.Visible = true;
        }

		private void EditUsers_Load(object sender, EventArgs e)
		{
			Text = string.Format(string.IsNullOrEmpty(TitleExtension) ? "{0}" : "{0} : {1}", Strings.User_Management, TitleExtension);
			addButton.Text = Strings.AddBtnText;
			editButton.Text = Strings.EditBtnText;
			deleteButton.Text = Strings.RemoveBtnText;
			closeButton.Text = Strings.CloseBtnText;

			listViewUsers.Columns.Add(Strings.User_name, 120);
			listViewUsers.Columns.Add(Strings.User_code, 80);
			listViewUsers.Columns.Add(Strings.Full_name, 250);
		}

        private void EditUsers_Activated(object sender, EventArgs e)
        {
            Cursor.Current = Cursors.WaitCursor;
            session = Users.DB.CreateSession();
            ListUsers();
            RefreshButtonStates();
        }

        public void ListUsers()
		{
            Cursor.Current = Cursors.WaitCursor;

            ListOfUsers = session.QueryOver<User>()
                                 .List();

            listViewUsers.Items.Clear();
            foreach (var person in ListOfUsers)
            {
                ListViewItem item = new ListViewItem(person.UserName);
                item.SubItems.Add(person.Number.ToString());
				item.SubItems.Add(person.FullName);
				item.Tag = person;
                this.listViewUsers.Items.Add(item);
            }
            this.listViewUsers.Refresh();

            Cursor.Current = Cursors.Default; 
        }

        private void closeButton_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        
        private void RefreshButtonStates()
		{
            editButton.Enabled = (listViewUsers.SelectedItems.Count > 0);
            deleteButton.Enabled = (listViewUsers.SelectedItems.Count >  0);
        }

        private void listViewUsers_SelectedIndexChanged(object sender, EventArgs e)
        {
            RefreshButtonStates();
            if (listViewUsers.SelectedItems.Count > 0)
            {
                LastSelectedIndex = listViewUsers.SelectedItems[0].Index;
            }
            else
			{
                LastSelectedIndex = -1;
            }
        }

        private void editButton_Click(object sender, EventArgs e)
        {
            Forms.EditSelectedUser dlg = new Forms.EditSelectedUser();
            dlg.CurrentEditUser = (User)listViewUsers.SelectedItems[0].Tag;
            dlg.Session = session;
            dlg.ShowDialog();
            ListUsers();
        }

        private void listViewUsers_DoubleClick(object sender, EventArgs e)
        {
            editButton_Click (sender, e);
        }

        private void addButton_Click(object sender, EventArgs e)
        {
            Forms.EditSelectedUser dlg;
            dlg = new Forms.EditSelectedUser();
			dlg.Session = session;
            dlg.CurrentEditUser = new User();
            dlg.ShowDialog();
            ListUsers();
        }

        private void deleteButton_Click(object sender, EventArgs e)
        {
            Object Selecteduser = listViewUsers.SelectedItems[0].Tag;
			Users.DB.DeleteObject(session, Selecteduser);
            ListUsers();
        }

        private void copyFromRemoteButton_Click(object sender, EventArgs e)
		{
			if (GlobalData.RemoteUsersDB == null || string.IsNullOrEmpty(GlobalData.RemoteUsersDB.ConnectionString) ||
				GlobalData.LocalUsersDB == null || string.IsNullOrEmpty(GlobalData.LocalUsersDB.ConnectionString))
			{
				MessageBox.Show(Strings.No_remote_database_of_users,
								Strings.Error,
								MessageBoxButtons.OK,
								MessageBoxIcon.Exclamation);
				return;
			}

			if (MessageBox.Show(Strings.Are_you_sure,
								Strings.Warning,
								MessageBoxButtons.YesNo,
								MessageBoxIcon.Exclamation) != DialogResult.Yes)
			{
				return;
			}

            try
            {
                ///
                /// Read remote users
                ///
                DB.DbType = GlobalData.RemoteUsersDB.DbType;
                DB.ConnectionString = GlobalData.RemoteUsersDB.ConnectionString;
                ISession session = DB.CreateSession();
                IList<User> remoteUsers = session.QueryOver<User>().List();
                IList<Group> remoteGroups = session.QueryOver<Group>().List();

                ///
                /// Delete all local users
                ///
                DB.DbType = GlobalData.LocalUsersDB.DbType;
                DB.ConnectionString = GlobalData.LocalUsersDB.ConnectionString;
                session = DB.CreateSession();
                IList<User> users = session.QueryOver<User>().List();
                foreach (var user in users) DB.DeleteObject(session, user);
                IList<Group> groups = session.QueryOver<Group>().List();
                foreach (var group in groups) DB.DeleteObject(session, group);
                session.Flush();

                ///
                /// Save all remote users to the local DB
                ///
                DB.DbType = GlobalData.LocalUsersDB.DbType;
                DB.ConnectionString = GlobalData.LocalUsersDB.ConnectionString;
                session = DB.CreateSession();
                IList<User> newUsers = session.QueryOver<User>().List();
                IList<Group> newGroups = session.QueryOver<Group>().List();
                foreach (var user in remoteUsers)
                {
                    User newUser = (User)user.Clone();
                    newUsers.Add(newUser);
                    foreach (var group in user.Groups)
                    {
                        Group newGroup = new Group(group.Gid, group.Name);
                        newUser.AddGroup(newGroup);
                    }
                    DB.SaveObject(session, newUser);
                }
                session.Flush();

                MessageBox.Show(string.Format(Strings.N_users_copied, remoteUsers.Count),
                                Strings.Confirmation,
                                MessageBoxButtons.OK,
                                MessageBoxIcon.Information);
            }
            catch (Exception)
            {
                MessageBox.Show(Strings.Copying_remote_users_failed,
                                Strings.Confirmation,
                                MessageBoxButtons.OK,
                                MessageBoxIcon.Information);
            }
		}
    }
}