"""
@package dbmgr.manager

@brief GRASS Attribute Table Manager

This program is based on FileHunter, published in 'The wxPython Linux
Tutorial' on wxPython WIKI pages.

It also uses some functions at
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/426407

List of classes:
 - manager::AttributeManager

(C) 2007-2014 by the GRASS Development Team

This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.

@author Jachym Cepicky <jachym.cepicky gmail.com>
@author Martin Landa <landa.martin gmail.com>
@author Refactoring by Stepan Turek <stepan.turek seznam.cz> (GSoC 2012, mentor: Martin Landa)
"""

import sys
import os

import wx
import wx.lib.flatnotebook    as FN

import grass.script as grass

from core             import globalvar
from core.gcmd        import GMessage
from core.debug       import Debug
from core.utils import _
from dbmgr.base       import DbMgrBase
from gui_core.widgets import GNotebook
                
class AttributeManager(wx.Frame, DbMgrBase):
    def __init__(self, parent, id = wx.ID_ANY,
                 title = None, vectorName = None, item = None, log = None,
                 selection = None, **kwargs):
        """GRASS Attribute Table Manager window

        :param parent: parent window
        :param id: window id
        :param title: window title or None for default title
        :param vectorName: name of vector map
        :param item: item from Layer Tree
        :param log: log window
        :param selection: name of page to be selected
        :param kwagrs: other wx.Frame's arguments
        """
        self.parent = parent
        try:
            mapdisplay = self.parent.GetMapDisplay()
        except:
            mapdisplay = None
        
        DbMgrBase.__init__(self, id = id, mapdisplay = mapdisplay,
                           vectorName = vectorName, item = item, 
                           log = log, statusbar = self, 
                           **kwargs)
        
        wx.Frame.__init__(self, parent, id, *kwargs)

        # title
        if not title:
            title = "%s" % _("GRASS GIS Attribute Table Manager - ")
            if not self.dbMgrData['editable']:
                title += _("READONLY - ")
            title += "<%s>" % (self.dbMgrData['vectName'])


        self.SetTitle(title)
        
        # icon
        self.SetIcon(wx.Icon(os.path.join(globalvar.ICONDIR, 'grass_sql.ico'), wx.BITMAP_TYPE_ICO))

        self.panel = wx.Panel(parent = self, id = wx.ID_ANY)
             
        if len(self.dbMgrData['mapDBInfo'].layers.keys()) == 0:
            GMessage(parent = self.parent,
                     message = _("Database connection for vector map <%s> "
                                 "is not defined in DB file. "
                                 "You can define new connection in "
                                 "'Manage layers' tab.") % self.dbMgrData['vectName'])
        
        busy = wx.BusyInfo(message=_("Please wait, loading attribute data..."),
                           parent=self.parent)
        wx.SafeYield()
        self.CreateStatusBar(number = 1)

        self.notebook = GNotebook(self.panel, style = globalvar.FNPageDStyle)
                
        self.CreateDbMgrPage(parent = self, pageName = 'browse')

        self.notebook.AddPage(page = self.pages['browse'], text = _("Browse data"),
                              name = 'browse')
        self.pages['browse'].SetTabAreaColour(globalvar.FNPageColor)

        self.CreateDbMgrPage(parent = self, pageName = 'manageTable')

        self.notebook.AddPage(page = self.pages['manageTable'], text = _("Manage tables"),
                              name = 'table')
        self.pages['manageTable'].SetTabAreaColour(globalvar.FNPageColor)

        self.CreateDbMgrPage(parent = self, pageName = 'manageLayer')
        self.notebook.AddPage(page = self.pages['manageLayer'], text = _("Manage layers"),
                              name = 'layers')
        del busy

        if selection:
            wx.CallAfter(self.notebook.SetSelectionByName, selection)
        else:
            wx.CallAfter(self.notebook.SetSelection, 0) # select browse tab
        
        # buttons
        self.btnClose   = wx.Button(parent = self.panel, id = wx.ID_CLOSE)
        self.btnClose.SetToolTipString(_("Close Attribute Table Manager"))
        self.btnReload = wx.Button(parent = self.panel, id = wx.ID_REFRESH)
        self.btnReload.SetToolTipString(_("Reload attribute data (selected layer only)"))

        # events
        self.btnClose.Bind(wx.EVT_BUTTON,   self.OnCloseWindow)
        self.btnReload.Bind(wx.EVT_BUTTON, self.OnReloadData)
        self.notebook.Bind(FN.EVT_FLATNOTEBOOK_PAGE_CHANGED, self.OnPageChanged)
        self.Bind(wx.EVT_CLOSE, self.OnCloseWindow)

        # do layout
        self._layout()

        # self.SetMinSize(self.GetBestSize())
        self.SetSize((700, 550)) # FIXME hard-coded size
        self.SetMinSize(self.GetSize())
    
    def _layout(self):
        """Do layout"""
        # frame body
        mainSizer = wx.BoxSizer(wx.VERTICAL)

        # buttons
        btnSizer = wx.BoxSizer(wx.HORIZONTAL)
        btnSizer.Add(item = self.btnReload, proportion = 1,
                     flag = wx.ALL | wx.ALIGN_RIGHT, border = 5)
        btnSizer.Add(item = self.btnClose, proportion = 1,
                     flag = wx.ALL | wx.ALIGN_RIGHT, border = 5)

        mainSizer.Add(item = self.notebook, proportion = 1, flag = wx.EXPAND)
        mainSizer.Add(item = btnSizer, flag = wx.ALIGN_RIGHT | wx.ALL, border = 5)

        self.panel.SetAutoLayout(True)
        self.panel.SetSizer(mainSizer)
        mainSizer.Fit(self.panel)
        self.Layout()
  
    def OnCloseWindow(self, event):
        """Cancel button pressed"""
        if self.parent and self.parent.GetName() == 'LayerManager':
            # deregister ATM
            self.parent.dialogs['atm'].remove(self)
                    
        if not isinstance(event, wx.CloseEvent):
            self.Destroy()
        
        event.Skip()

    def OnReloadData(self, event):
        """Reload data"""
        if self.pages['browse']:
            self.pages['browse'].OnDataReload(event) # TODO replace by signal
        
    def OnPageChanged(self, event):
        """On page in ATM is changed"""
        try:
            if self.pages["browse"]:
                selPage = self.pages["browse"].selLayer
                id = self.pages["browse"].layerPage[selPage]['data']
            else:
                id = None
        except KeyError:
            id = None
        
        if event.GetSelection() == self.notebook.GetPageIndexByName('browse') and id:
            win = self.FindWindowById(id)
            if win:
                self.log.write(_("Number of loaded records: %d") % win.GetItemCount())
            else:
                self.log.write("")
            self.btnReload.Enable()
        else:
            self.log.write("")
            self.btnReload.Enable(False)
        
        event.Skip()   

    def OnTextEnter(self, event):
        pass

    def UpdateDialog(self, layer):
        """Updates dialog layout for given layer"""
        DbMgrBase.UpdateDialog(self, layer = layer)
        # set current page selection
        self.notebook.SetSelectionByName('layers') 
