using System;
using System.Collections.Generic;
using System.Windows.Forms;
using NHibernate;
using TBF.Entities;
using TBF.Resources;

namespace TBF.Forms
{
    public partial class EditSelectedUser : Form
    {
        public User CurrentEditUser;
        public NHibernate.ISession Session;

        public EditSelectedUser()
        {
            InitializeComponent();
            this.toolTip1.SetToolTip(this.txtName, Strings.MaxChars.Replace("_X_", Convert.ToString(20)));
            
            btnOk.Enabled = false;
        }

        private void EditSelectedUser_Load(object sender, EventArgs e)
        {
            txtName.Text = CurrentEditUser.Name;
            txtDescription.Text = CurrentEditUser.Description;
            txtPassword.Text = "";
            ShowGroups();
        }


        public void ShowGroups()
        {
            checkedListBoxGroups.Items.Clear();
            for (int i= 0; (int)i < Grp.Count; i++)
            {
                Group group = Grp.FromId((Grp.GID)i);

                bool boolIsMember = CurrentEditUser.IsMemberOf((Grp.GID)group.Gid);
                if (boolIsMember == true)
                {
                    checkedListBoxGroups.Items.Add(group.Name);
                    checkedListBoxGroups.SetItemCheckState(i, CheckState.Checked);
                }
                else 
                {
                    checkedListBoxGroups.Items.Add(group.Name);
                    checkedListBoxGroups.SetItemCheckState(i, CheckState.Unchecked);
                   
                }
            }
        }


        public bool Save() {
            
            //  todo: check if this name is given to another user
            if (IsUserNameAllreadyTaken(txtName.Text))
            {
                MessageBox.Show(Strings.Username_taken);
                return false;
            }


            CurrentEditUser.Name = txtName.Text;

            if (txtPassword.Text != "") 
            {
                CurrentEditUser.SetPassword(txtPassword.Text);
            }
            CurrentEditUser.Description = txtDescription.Text;
            
            // Groups
            CurrentEditUser.Groups.Clear();
            for (int i = 0; (int)i < checkedListBoxGroups.Items.Count ; i++)
            {
                if (checkedListBoxGroups.GetItemChecked(i)) {
                    Group newGroup = Grp.FromId((Grp.GID)i);
                    CurrentEditUser.Groups.Add(newGroup );         
                }
            }
            
            Cursor.Current = Cursors.WaitCursor;
			FluentCommon.SaveToDb(Session, CurrentEditUser);
            Cursor.Current = Cursors.Default;

            return true;
        }

        /// <summary>
        /// returns true if the username allready exists for another user
        /// </summary>
        private bool IsUserNameAllreadyTaken(string Username)
        {
            // have a look into all other users
            IList<User> ListOfUsers = User.GetAllUsers();
            foreach (var person in ListOfUsers)
            {
                if (person.Id != CurrentEditUser.Id) { 
                    // other user
                    if (person.Name.ToLower() == Username.ToLower())
                    {
                        // Name is equal, so allready taken
                        return true;
                    }
                }
            }
            return false;
        }


        private void btnOk_Click(object sender, EventArgs e)
        {
            if (Save())
            {
                this.Close();
            }
        }

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



        private void CheckIfFormCanBeSubmitted()
        {
            btnOk.Enabled = false;
            if (txtName.Text == "") return;
            btnOk.Enabled = true;
        }

        private void EditSelectedUser_Shown(object sender, EventArgs e)
        {
            txtName.Focus();
        }

        private void txtName_Validated(object sender, EventArgs e)
        {
            CheckIfFormCanBeSubmitted();
        }

        private void txtName_KeyPress(object sender, KeyPressEventArgs e)
        {
            CheckIfFormCanBeSubmitted();

        }

        private void txtName_TextChanged(object sender, EventArgs e)
        {
            CheckIfFormCanBeSubmitted();
        }

        private void txtPassword_TextChanged(object sender, EventArgs e)
        {
            CheckIfFormCanBeSubmitted();
        }

        private void txtDescription_TextChanged(object sender, EventArgs e)
        {
            CheckIfFormCanBeSubmitted();
        }

        private void txtDescription_KeyPress(object sender, KeyPressEventArgs e)
        {
            CheckIfFormCanBeSubmitted();
        }

        private void checkedListBoxGroups_Click(object sender, EventArgs e)
        {
            CheckIfFormCanBeSubmitted();
        }
    }
}