///
/// Copyright (c) 2013-2015 Senus Slovensko a.s.
///
using System;
using System.Windows.Forms;
using Config.Entities;
using TBF.Resources;

namespace TBF.UI.Shared
{
    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,
			Add		  = (1 << 0),	/// optional
            Remove    = (1 << 1),	/// optional
            Up        = (1 << 2),	/// optional
            Down      = (1 << 3),	/// optional
            Edit      = (1 << 4),	/// optional
            Copy      = (1 << 5),	/// optional
            Export    = (1 << 6),	/// optional
            Import    = (1 << 7),	/// optional
            Compare   = (1 << 8),	/// optional
            NewTab    = (1 << 9),	/// optional
            RenameTab = (1 << 10),	/// optional
            RemoveTab = (1 << 11),	/// optional
            More      = (1 << 12),	/// optional
            Custom1   = (1 << 13),	/// optional
            Custom2   = (1 << 14),	/// optional
            Custom3   = (1 << 15),	/// optional
        }

        readonly System.Windows.Forms.Button[] buttonCtrls;

        /// <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 string Custom1Caption { set { customButton1.Text = value; } }
        public string Custom2Caption { set { customButton2.Text = value; } }
        public string Custom3Caption { set { customButton3.Text = value; } }

        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;

        bool buttonsRepositionsed;

		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 Form ParentForm;     /// Used as a current form reference when changing and restoring a user

        public Common.GID[] RequiredGroupMembership;

        /// <summary>
        /// Default constructor
        /// </summary>
        public SharedButtons()
        {
            InitializeComponent();
            lockState = LockState.Locked;
			MoreActive = false;
			RequiredGroupMembership = null;
            buttonCtrls = new System.Windows.Forms.Button[]
            {
                addButton, removeButton, upButton, downButton, editButton, copyButton,
                exportButton, importButton, compareButton,
                newTabButton, renameTabButton, removeTabButton, moreButton,
                customButton1, customButton2, customButton3,
            };
            OptionalButtons = Buttons.None;
            buttonsRepositionsed = false;
        }

        /// <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;
            exportButton.Text = Strings.Export;
            importButton.Text = Strings.Import;
            compareButton.Text = Strings.Compare;
			newTabButton.Text = Strings.NewTabBtnText;
			renameTabButton.Text = Strings.RenameTabBtnText;
			removeTabButton.Text = Strings.RemoveTabBtnText;
			moreButton.Text = Strings.MoreBtnText;

            cancelButton.Hide();
            ShowOrHideButtons((Buttons)0x7FFFFFFF, false);
        }


        void RepositionButtons(Buttons enabledButtons)
        {
            if (!buttonsRepositionsed)
            {
                buttonsRepositionsed = true;    /// Reposition buttons once

                int spacing = unlockButton.Height + 3;
                const int ExtraSpacing = 15;
                int nextTop = cancelButton.Top + spacing + ExtraSpacing;

                for (int i = 0; i < buttonCtrls.Length; i++)
                {
                    Buttons btn = (Buttons)(1 << i);
                    if ((OptionalButtons & btn) != 0)
                    {
                        buttonCtrls[i].Top = nextTop;
                        nextTop += spacing + ((btn == Buttons.Down || btn == Buttons.Compare || btn == Buttons.RemoveTab) ? ExtraSpacing : 0);
                    }
                }
            }
        }

        void ShowOrHideButtons(Buttons selectedButtons, bool value)
        {
            for (int i = 0; i < buttonCtrls.Length; i++)
            {
                if ((selectedButtons & (Buttons)(1 << i)) != 0) buttonCtrls[i].Visible = value;
            }
        }

        public void EnableOrDisableButtons(Buttons selectedButtons, bool value)
        {
            for (int i = 0; i < buttonCtrls.Length; i++)
            {
                if ((selectedButtons & (Buttons)(1 << i)) != 0) buttonCtrls[i].Enabled = value;
            }
        }

        public void DisableUnlock()
        {
            unlockButton.Enabled = false;
        }

        /// <summary>
        /// Update the visibility of buttons and OK button text when the dialog is unlocked
        /// </summary>
        public void UnlockButtons()
        {
            RepositionButtons(OptionalButtons);

            unlockButton.Enabled = false;
            okButton.Text = Strings.OkBtnText;
            cancelButton.Visible = true;
            ShowOrHideButtons(OptionalButtons, true);
            lockState = LockState.Unlocked;
        }

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

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

        /// <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 ExportClicked;
        public event EventHandler ImportClicked;
        public event EventHandler CompareClicked;
        public event EventHandler MoreClicked;
        public event EventHandler Custom1Clicked;
        public event EventHandler Custom2Clicked;
        public event EventHandler Custom3Clicked;

        /// <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 (!Users.CurrentUser.IsMemberOf(RequiredGroupMembership))
                {
					if ((new Users.Forms.LoginDlg(RequiredGroupMembership, ParentForm)).ShowDialog() != DialogResult.OK)
						return;
                }
                else if (Program.LocalSettings.AlwaysAskPasswdWhenUnlocking)
                {
					if ((new Users.Forms.LoginDlg(Users.CurrentUser.UserName(), RequiredGroupMembership, ParentForm)).ShowDialog() != DialogResult.OK)
						return;
                }

				if (Program.MainWnd != null) Program.MainWnd.UpdateUser();

				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 exportButton_Click(object s, EventArgs e)      { if (ExportClicked != null)    ExportClicked(s, e);    }
        private void importButton_Click(object s, EventArgs e)      { if (ImportClicked != null)    ImportClicked(s, e);    }
        private void compareButton_Click(object s, EventArgs e)     { if (CompareClicked != null)   CompareClicked(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); }
        private void customButton1_Click(object s, EventArgs e)     { if (Custom1Clicked != null)   Custom1Clicked(s, e);   }
        private void customButton2_Click(object s, EventArgs e)     { if (Custom2Clicked != null)   Custom2Clicked(s, e);   }
        private void customButton3_Click(object s, EventArgs e)     { if (Custom3Clicked != null)   Custom3Clicked(s, e);   }
    }
}