#!/usr/bin/env python
# -*- coding: utf-8 -*-

#This file is part of PLCOpenEditor, a library implementing an IEC 61131-3 editor
#based on the plcopen standard. 
#
#Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
#
#See COPYING file for copyrights details.
#
#This library is free software; you can redistribute it and/or
#modify it under the terms of the GNU General Public
#License as published by the Free Software Foundation; either
#version 2.1 of the License, or (at your option) any later version.
#
#This library is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#General Public License for more details.
#
#You should have received a copy of the GNU General Public
#License along with this library; if not, write to the Free Software
#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import re

import wx

#-------------------------------------------------------------------------------
#                                  Helpers
#-------------------------------------------------------------------------------

MICROSECONDS = 0.001
MILLISECONDS = 1
SECOND = 1000
MINUTE = 60 * SECOND
HOUR = 60 * MINUTE
DAY = 24 * HOUR

IEC_TIME_MODEL = re.compile("(?:(?:T|TIME)#)?(-)?(?:(%(float)s)D_?)?(?:(%(float)s)H_?)?(?:(%(float)s)M(?!S)_?)?(?:(%(float)s)S_?)?(?:(%(float)s)MS)?" % {"float": "[0-9]+(?:\.[0-9]+)?"})

CONTROLS = [
    ("Days", _('Days:')),
    ("Hours", _('Hours:')),
    ("Minutes", _('Minutes:')),
    ("Seconds", _('Seconds:')),
    ("Milliseconds", _('Milliseconds:')),
    ("Microseconds", _('Microseconds:')),
]

#-------------------------------------------------------------------------------
#                         Edit Duration Value Dialog
#-------------------------------------------------------------------------------

class DurationEditorDialog(wx.Dialog):

    def __init__(self, parent):
        wx.Dialog.__init__(self, parent, 
              size=wx.Size(700, 200), title=_('Edit Duration'))
        
        main_sizer = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=10)
        main_sizer.AddGrowableCol(0)
        main_sizer.AddGrowableRow(0)
        
        controls_sizer = wx.FlexGridSizer(cols=len(CONTROLS), hgap=10, rows=2, vgap=10)
        main_sizer.AddSizer(controls_sizer, border=20, 
              flag=wx.TOP|wx.LEFT|wx.RIGHT|wx.GROW)
        
        controls = []
        for i, (name, label) in enumerate(CONTROLS):
            controls_sizer.AddGrowableCol(i)
            
            st = wx.StaticText(self, label=label)
            txtctrl = wx.TextCtrl(self, value='0', style=wx.TE_PROCESS_ENTER)
            self.Bind(wx.EVT_TEXT_ENTER, 
                      self.GetControlValueTestFunction(txtctrl), 
                      txtctrl)
            setattr(self, name, txtctrl)
        
            controls.append((st, txtctrl))
            
        for st, txtctrl in controls:
            controls_sizer.AddWindow(st, flag=wx.GROW)
            
        for st, txtctrl in controls:
            controls_sizer.AddWindow(txtctrl, flag=wx.GROW)
        
        button_sizer = self.CreateButtonSizer(wx.OK|wx.CANCEL|wx.CENTRE)
        self.Bind(wx.EVT_BUTTON, self.OnOK, button_sizer.GetAffirmativeButton())
        main_sizer.AddSizer(button_sizer, border=20, 
              flag=wx.ALIGN_RIGHT|wx.BOTTOM|wx.LEFT|wx.RIGHT)
        
        self.SetSizer(main_sizer)
        
        self.Days.SetFocus()
        
    def SetDuration(self, value):
        result = IEC_TIME_MODEL.match(value.upper())
        if result is not None:
            values = result.groups()
            for control, index in [(self.Days, 1), (self.Hours, 2),
                                   (self.Minutes, 3), (self.Seconds, 4)]:
                value = values[index]
                if value is not None:
                    control.SetValue(value)
                else:
                    control.SetValue("0")
            milliseconds = values[5]
            if milliseconds is not None:
                self.Milliseconds.SetValue("%d" % int(float(milliseconds)))
                self.Microseconds.SetValue("%.3f" % ((float(milliseconds) % MILLISECONDS) / MICROSECONDS))
            else:
                self.Milliseconds.SetValue("0")
                self.Microseconds.SetValue("0")
        
    def GetControlValueTestFunction(self, control):
        def OnValueChanged(event):
            try:
                value = float(control.GetValue())
            except ValueError, e:
                message = wx.MessageDialog(self, _("Invalid value!\nYou must fill a numeric value."), _("Error"), wx.OK|wx.ICON_ERROR)
                message.ShowModal()
                message.Destroy()
            event.Skip()
        return OnValueChanged

    def GetDuration(self):
        milliseconds = 0
        for control, factor in [(self.Days, DAY), (self.Hours, HOUR),
                                (self.Minutes, MINUTE), (self.Seconds, SECOND),
                                (self.Milliseconds, MILLISECONDS), (self.Microseconds, MICROSECONDS)]:
            
            milliseconds += float(control.GetValue()) * factor
        
        not_null = False
        duration = "T#"
        for value, format in [(int(milliseconds) / DAY, "%dd"),
                            ((int(milliseconds) % DAY) / HOUR, "%dh"),
                            ((int(milliseconds) % HOUR) / MINUTE, "%dm"),
                            ((int(milliseconds) % MINUTE) / SECOND, "%ds")]:
            
            if value > 0 or not_null:
                duration += format % value
                not_null = True
        
        duration += "%gms" % (milliseconds % SECOND)
        return duration
    
    def OnOK(self, event):
        errors = []
        for control, name in [(self.Days, "days"), (self.Hours, "hours"), 
                              (self.Minutes, "minutes"), (self.Seconds, "seconds"),
                              (self.Milliseconds, "milliseconds")]:
            try:
                value = float(control.GetValue())
            except ValueError, e:
                errors.append(name)
        if len(errors) > 0:
            if len(errors) == 1:
                message = _("Field %s hasn't a valid value!") % errors[0]
            else:
                message = _("Fields %s haven't a valid value!") % ",".join(errors)
            dialog = wx.MessageDialog(self, message, _("Error"), wx.OK|wx.ICON_ERROR)
            dialog.ShowModal()
            dialog.Destroy()
        else:
            self.EndModal(wx.ID_OK)