///
/// Copyright (c) 2013-2015 Sensus Metering Systems
///
using System;
using System.Windows.Forms;
using Config.Entities;
using TBF.Resources;

namespace TBF.UiControls
{
    public partial class SharedButtons : UserControl
    {
        /// <summary>
        /// Masks to specify the enabled state and the visibility of buttons.
		/// Unlock button is hard coded in this control, cannot be set from the parent.
        /// </summary>
        public enum Buttons
        {
            None	  = 0,
			OK		  = 1,		/// always visible, text = 'Close' when locked
			Cancel	  = 2,		/// always visible
			Add		  = 4,		/// optional
			Remove	  = 8,		/// optional
			Up		  = 16,		/// optional
			Down	  = 32,		/// optional
			Edit	  = 64,		/// optional
			Copy	  = 128,	/// optional
			NewTab	  = 256,	/// optional
			RenameTab = 512,	/// optional
			RemoveTab = 1024,	/// optional
			More      = 2048,	/// optional
		}

        /// <summary>
        /// Optional buttons are Add, Remove, Up, Down, Edit and Copy.
		/// OK and Cancel buttons are always visible (after unlock), but not always enabled.
        /// </summary>
        public Buttons OptionalButtons;

        public enum LockState
        {
            Locked,		/// 'Unlock', 'Close' (=OK) are shown, all the othere are hidden
            Unlocked,	/// Unlock, Ok, Cancel, Add,Remove and all optional buttons are shown
        }
        LockState lockState;

		public bool MoreActive;
        public int MoreButtonTop;

		/// <summary>
		/// Used by controls to indicate which item is selected
		/// and to appropriately update Remove, Up and Down Buttons.
		/// </summary>
		public enum SelectedItemPos
		{
			None,
			First,
			Last,
			FirstAndLast,
			Middle,
		}

        public Config.Grp.GID RequiredGroupMembership;

        Config.IUser originalUser;

        /// <summary>
        /// Default constructor
        /// </summary>
        public SharedButtons()
        {
            originalUser = Config.Data.CurrentUser;
            lockState = LockState.Locked;
			MoreActive = false;
            OptionalButtons = Buttons.None;
            RequiredGroupMembership = Config.Grp.GID.None;
            InitializeComponent();
        }

        /// <summary>
        /// Initialize the buttons when the dialog is loaded
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void SharedDlgButtons_Load(object sender, EventArgs e)
        {
            unlockButton.Text = Strings.UnlockBtnText;
            okButton.Text = Strings.CloseBtnText;
            cancelButton.Text = Strings.CancelBtnText;
            addButton.Text = Strings.AddBtnText;
            removeButton.Text = Strings.RemoveBtnText;
            upButton.Text = Strings.UpBtnText;
            downButton.Text = Strings.DownBtnText;
            editButton.Text = Strings.EditBtnText;
            copyButton.Text = Strings.CopyBtnText;
			newTabButton.Text = Strings.NewTabBtnText;
			renameTabButton.Text = Strings.RenameTabBtnText;
			removeTabButton.Text = Strings.RemoveTabBtnText;
			moreButton.Text = Strings.MoreBtnText;

            cancelButton.Hide();
            addButton.Hide();
            removeButton.Hide();
            upButton.Hide();
            downButton.Hide();
            editButton.Hide();
            copyButton.Hide();
			newTabButton.Hide();
			renameTabButton.Hide();
			removeTabButton.Hide();
			moreButton.Hide();

			/// Reposition 'Edit' and 'Copy" buttons in case both 'Up' and 'Down' are hidden
			if (((OptionalButtons & Buttons.Up) == 0) &&
				((OptionalButtons & Buttons.Down) == 0))
			{
				editButton.Top = upButton.Top;
				copyButton.Top = downButton.Top;
			}

			/// Reposition Tab-related button in case both 'Edit' and 'Copy" are hidden
			if (((OptionalButtons & Buttons.Edit) == 0) &&
				((OptionalButtons & Buttons.Copy) == 0))
			{
				removeTabButton.Top = newTabButton.Top + 15;
				newTabButton.Top = editButton.Top + 15;
				renameTabButton.Top = copyButton.Top + 15;
			}

			if ((OptionalButtons & Buttons.Add) == 0 &&
				(OptionalButtons & Buttons.Remove) == 0 &&
				(OptionalButtons & Buttons.Up) == 0 &&
				(OptionalButtons & Buttons.Down) == 0 &&
				(OptionalButtons & Buttons.Edit) == 0 &&
				(OptionalButtons & Buttons.Copy) == 0 &&
				(OptionalButtons & Buttons.NewTab) == 0 &&
				(OptionalButtons & Buttons.RenameTab) == 0 &&
				(OptionalButtons & Buttons.RemoveTab) == 0)
			{
                moreButton.Top = MoreButtonTop;
			}
#if DEBUG
			//unlockBtn_Click(sender, e);
#endif
        }

        /// <summary>
        /// Update the visibility of buttons and OK button text when the dialog is unlocked
        /// </summary>
        public void UnlockButtons()
        {
            unlockButton.Enabled = false;
            okButton.Text = Strings.OkBtnText;
            cancelButton.Show();
			if ((OptionalButtons & Buttons.Add) != 0)		addButton.Show();
			if ((OptionalButtons & Buttons.Remove) != 0)	removeButton.Show();
			if ((OptionalButtons & Buttons.Up) != 0)		upButton.Show();
            if ((OptionalButtons & Buttons.Down) != 0)		downButton.Show();
            if ((OptionalButtons & Buttons.Edit) != 0)		editButton.Show();
            if ((OptionalButtons & Buttons.Copy) != 0)		copyButton.Show();
			if ((OptionalButtons & Buttons.NewTab) != 0)	newTabButton.Show();
			if ((OptionalButtons & Buttons.RenameTab) != 0) renameTabButton.Show();
			if ((OptionalButtons & Buttons.RemoveTab) != 0) removeTabButton.Show();
			if ((OptionalButtons & Buttons.More) != 0)		moreButton.Show();

            lockState = LockState.Unlocked;
        }

        /// <summary>
        /// Enable specified buttons
        /// </summary>
		public void EnableButtons(Buttons buttons)
		{
			SetEnabled(buttons, true);
		}

		/// <summary>
		/// Disable specified buttons
		/// </summary>
		public void DisableButtons(Buttons buttons)
		{
			SetEnabled(buttons, false);
		}

		public void SetEnabled(Buttons buttons, bool value)
        {
			if ((buttons & Buttons.OK) != 0)		okButton.Enabled = value;
			if ((buttons & Buttons.Cancel) != 0)	cancelButton.Enabled = value;
			if ((buttons & Buttons.Add) != 0)		addButton.Enabled = value;
			if ((buttons & Buttons.Remove) != 0)	removeButton.Enabled = value;
			if ((buttons & Buttons.Up) != 0)		upButton.Enabled = value;
			if ((buttons & Buttons.Down) != 0)		downButton.Enabled = value;
			if ((buttons & Buttons.Edit) != 0)		editButton.Enabled = value;
			if ((buttons & Buttons.Copy) != 0)		copyButton.Enabled = value;
			if ((buttons & Buttons.NewTab) != 0)	newTabButton.Enabled = value;
			if ((buttons & Buttons.RenameTab) != 0) renameTabButton.Enabled = value;
			if ((buttons & Buttons.RemoveTab) != 0) removeTabButton.Enabled = value;
			if ((buttons & Buttons.More) != 0)		moreButton.Enabled = value;
		}

        void RestoreUser()
        {
			Config.Data.CurrentUser = originalUser;
            Program.MainWnd.UpdateUser();
        }

        /// <summary>
        /// Events invoked when buttons are clicked (and in case of Unlock kbutton also accepted)
        /// </summary>
        public event EventHandler Unlocked;
        public event EventHandler OKClicked;
        public event EventHandler CancelClicked;
        public event EventHandler AddClicked;
        public event EventHandler RemoveClicked;
        public event EventHandler UpClicked;
        public event EventHandler DownClicked;
        public event EventHandler EditClicked;
        public event EventHandler CopyClicked;
		public event EventHandler NewTabClicked;
		public event EventHandler RenameTabClicked;
		public event EventHandler RemoveTabClicked;
		public event EventHandler MoreClicked;

        /// <summary>
        /// 'Unlock' button handler
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        public void unlockBtn_Click(object sender, EventArgs e)
        {
            if (lockState == LockState.Locked)
            {
				if (!Config.Data.CurrentUser.IsMemberOf(RequiredGroupMembership))
                {
                    if ((new Forms.LoginDlg(RequiredGroupMembership)).ShowDialog() != DialogResult.OK) return;
                }
                else if (Program.LocalSettings.AlwaysAskPasswdWhenUnlocking)
                {
					if ((new Forms.LoginDlg(Config.Data.CurrentUser.UserName, RequiredGroupMembership)).ShowDialog() != DialogResult.OK) return;
                }

                UnlockButtons();

                if (Unlocked != null) Unlocked(sender, e);
            }
        }

        /// <summary>
        /// 'OK'/'Close' button handler. Handled as 'Cancel' in the locked state ('Close' button).
        /// </summary>
        private void okBtn_Click(object sender, EventArgs e)
        {
            if (lockState == LockState.Locked)
            {
                if (CancelClicked != null) CancelClicked(sender, e);
            }
            else
            {
                if (OKClicked != null) OKClicked(sender, e);
            }
        }

		private void moreButton_Click(object sender, EventArgs e)
		{
			if (MoreActive)
			{
				MoreActive = false;
				moreButton.Text = Strings.MoreBtnText;
			}
			else
			{
				MoreActive = true;
				moreButton.Text = Strings.LessBtnText;
			}

			if (MoreClicked != null) MoreClicked(sender, e);
		}

        ///
        /// All remaining handlers:
        ///
        private void cancelBtn_Click(object s, EventArgs e) { if (CancelClicked != null) CancelClicked(s, e); }
        private void addBtn_Click(object s, EventArgs e)    { if (AddClicked != null)   AddClicked(s, e); }
        private void removeBtn_Click(object s, EventArgs e) { if (RemoveClicked != null) RemoveClicked(s, e); }
        private void upBtn_Click(object s, EventArgs e)     { if (UpClicked != null)     UpClicked(s, e); }
        private void downBtn_Click(object s, EventArgs e)   { if (DownClicked != null)   DownClicked(s, e); }
        private void editBtn_Click(object s, EventArgs e)   { if (EditClicked != null)   EditClicked(s, e); }
        private void copyBtn_Click(object s, EventArgs e)   { if (CopyClicked != null)   CopyClicked(s, e); }
		private void newTabButton_Click(object s, EventArgs e) { if (NewTabClicked != null)   NewTabClicked(s, e); }
		private void renameTabButton_Click(object s, EventArgs e) { if (RenameTabClicked != null)   RenameTabClicked(s, e); }
		private void removeTabButton_Click(object s, EventArgs e) { if (RemoveTabClicked != null)   RemoveTabClicked(s, e); }
    }
}