using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using VEPROMS.CSLA.Library;

namespace WinApp
{
	public partial class frmMembership : Form
	{
		public frmMembership()
		{
			InitializeComponent();
		}
		Membership _mem;
		private void frmMembership_Load(object sender, EventArgs e)
		{
			membershipInfoListBindingSource.DataSource = MembershipInfoList.Get();
			SetupDetail();
			SetupButtons();
		}
		private DialogResult SaveAsNeeded()
		{
			if (_mem != null && _mem.IsSavable)
			{
				DialogResult dr = MessageBox.Show("Do you want to save changes", "Save Changes", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
				if (dr == DialogResult.Yes) Save();
				if (dr == DialogResult.No) Cancel();
				// TODO: Need a Cancel
				return dr;
			}
			return DialogResult.Yes;
		}
		private void SetupDetail()
		{
			if (lbMembers.SelectedIndex != -1)
			{
				int ugid = (int)lbMembers.SelectedValue;
				if (_mem == null || _mem.UGID != ugid)
				{
					if (SaveAsNeeded() != DialogResult.Cancel)
					{
						_mem = Membership.Get(ugid);
						membershipBindingSource.DataSource = _mem;
					}
				}
			}
		}
		private void lbMembers_SelectedValueChanged(object sender, EventArgs e)
		{
			SetupDetail();
		}
		private void SetupButtons()
		{
			if (_mem != null)
			{
				btnSave.Enabled = _mem.IsSavable;
				btnCancel.Enabled = _mem.IsDirty;
				btnNew.Enabled = _mem.IsValid;
			}
			else
			{
				btnSave.Enabled = false;
				btnCancel.Enabled = false;
				btnNew.Enabled = true;
			}
		}
		private void CurrentItemChanged(object sender, EventArgs e)
		{
			SetupButtons();
		}
		private void btnCancel_Click(object sender, EventArgs e)
		{
			Cancel();
		}
		private void btnSave_Click(object sender, EventArgs e)
		{
			Save();
		}
		private void btnNew_Click(object sender, EventArgs e)
		{
			New();
		}
		private void Cancel()
		{
			_mem.CancelEdit();
			_mem.BeginEdit();
		}
		private void Save()
		{
			membershipBindingSource.RaiseListChangedEvents = false;
			membershipBindingSource.EndEdit();

			try
			{
				Membership temp = _mem.Clone();
				_mem = temp.Save();
				_mem.BeginEdit();
				membershipBindingSource.DataSource = null;
				int ugid = _mem.UID;
				if (lbMembers.SelectedIndex == -1)
					lbMembers.SelectedValue = ugid;
				membershipBindingSource.DataSource = _mem;
			}
			catch (Csla.DataPortalException ex)
			{
				MessageBox.Show(ex.BusinessException.ToString(),
				"Error saving", MessageBoxButtons.OK,
				MessageBoxIcon.Exclamation);
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.ToString(), "Error saving",
				MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
			}
			finally
			{
				membershipBindingSource.RaiseListChangedEvents = true;
				membershipBindingSource.ResetBindings(false);
			}
			SetupButtons();
		}
		public void New()
		{
			if (SaveAsNeeded() != DialogResult.Cancel)
			{
				_mem = Membership.New();
				membershipBindingSource.DataSource = _mem;
				lbMembers.SelectedIndex = -1;
			}
		}

	}
}