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#!/usr/bin/env python

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# -*- coding: utf-8 -*-

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# This file is part of Beremiz, a Integrated Development Environment for

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# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.

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#

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# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD

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# Copyright (C) 2017: Andrey Skvortsov <andrej.skvortzov@gmail.com>

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#

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# See COPYING file for copyrights details.

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#

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# This program is free software; you can redistribute it and/or

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# modify it under the terms of the GNU General Public License

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# as published by the Free Software Foundation; either version 2

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# of the License, or (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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# GNU General Public License for more details.

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#

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# You should have received a copy of the GNU General Public License

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# along with this program; if not, write to the Free Software

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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

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from __future__ import absolute_import

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import re

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import wx

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# -------------------------------------------------------------------------------

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#                                  Helpers

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# -------------------------------------------------------------------------------

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MICROSECONDS = 0.001

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MILLISECONDS = 1

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SECOND = 1000

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MINUTE = 60 * SECOND

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HOUR = 60 * MINUTE

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DAY = 24 * HOUR

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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]+)?"})

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CONTROLS = [

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    ("Days", _('Days:')),

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    ("Hours", _('Hours:')),

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    ("Minutes", _('Minutes:')),

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    ("Seconds", _('Seconds:')),

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    ("Milliseconds", _('Milliseconds:')),

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    ("Microseconds", _('Microseconds:')),

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]

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# -------------------------------------------------------------------------------

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#                         Edit Duration Value Dialog

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# -------------------------------------------------------------------------------

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class DurationEditorDialog(wx.Dialog):

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    def __init__(self, parent):

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        wx.Dialog.__init__(self, parent, title=_('Edit Duration'))

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        main_sizer = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=10)

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        main_sizer.AddGrowableCol(0)

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        main_sizer.AddGrowableRow(0)

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        controls_sizer = wx.FlexGridSizer(cols=len(CONTROLS), hgap=10, rows=2, vgap=10)

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        main_sizer.AddSizer(controls_sizer, border=20,

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                            flag=wx.TOP | wx.LEFT | wx.RIGHT | wx.GROW)

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        controls = []

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        for i, (name, label) in enumerate(CONTROLS):

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            controls_sizer.AddGrowableCol(i)

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            st = wx.StaticText(self, label=label)

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            txtctrl = wx.TextCtrl(self, value='0', style=wx.TE_PROCESS_ENTER)

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            self.Bind(wx.EVT_TEXT_ENTER,

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                      self.GetControlValueTestFunction(txtctrl),

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                      txtctrl)

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            setattr(self, name, txtctrl)

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            controls.append((st, txtctrl))

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        for st, txtctrl in controls:

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            controls_sizer.AddWindow(st, flag=wx.GROW)

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        for st, txtctrl in controls:

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            controls_sizer.AddWindow(txtctrl, flag=wx.GROW)

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        button_sizer = self.CreateButtonSizer(wx.OK | wx.CANCEL | wx.CENTRE)

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        self.Bind(wx.EVT_BUTTON, self.OnOK, button_sizer.GetAffirmativeButton())

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        main_sizer.AddSizer(button_sizer, border=20,

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                            flag=wx.ALIGN_RIGHT | wx.BOTTOM | wx.LEFT | wx.RIGHT)

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        self.SetSizer(main_sizer)

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        self.Fit()

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        self.Days.SetFocus()

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    def SetDuration(self, value):

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        result = IEC_TIME_MODEL.match(value.upper())

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        if result is not None:

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            values = result.groups()

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            for control, index in [(self.Days, 1), (self.Hours, 2),

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                                   (self.Minutes, 3), (self.Seconds, 4)]:

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                value = values[index]

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                if value is not None:

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                    control.SetValue(value)

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                else:

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                    control.SetValue("0")

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            milliseconds = values[5]

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            if milliseconds is not None:

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                self.Milliseconds.SetValue("%d" % int(float(milliseconds)))

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                self.Microseconds.SetValue("%.3f" % ((float(milliseconds) % MILLISECONDS) / MICROSECONDS))

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            else:

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                self.Milliseconds.SetValue("0")

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                self.Microseconds.SetValue("0")

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    def GetControlValueTestFunction(self, control):

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        def OnValueChanged(event):

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            try:

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                float(control.GetValue())

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            except ValueError:

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                message = wx.MessageDialog(self, _("Invalid value!\nYou must fill a numeric value."), _("Error"), wx.OK | wx.ICON_ERROR)

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                message.ShowModal()

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                message.Destroy()

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            event.Skip()

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            self.OnCloseDialog()

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        return OnValueChanged

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    def GetDuration(self):

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        milliseconds = 0

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        for control, factor in [(self.Days, DAY), (self.Hours, HOUR),

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                                (self.Minutes, MINUTE), (self.Seconds, SECOND),

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                                (self.Milliseconds, MILLISECONDS), (self.Microseconds, MICROSECONDS)]:

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            milliseconds += float(control.GetValue()) * factor

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        not_null = False

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        duration = "T#"

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        for value, format in [((int(milliseconds) / DAY),             "%dd"),

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                              ((int(milliseconds) % DAY) / HOUR,      "%dh"),

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                              ((int(milliseconds) % HOUR) / MINUTE,   "%dm"),

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                              ((int(milliseconds) % MINUTE) / SECOND, "%ds")]:

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            if value > 0 or not_null:

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                duration += format % value

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                not_null = True

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        duration += "%gms" % (milliseconds % SECOND)

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        return duration

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    def OnOK(self, event):

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        self.OnCloseDialog()

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    def OnCloseDialog(self):

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        errors = []

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        for control, name in [(self.Days, _("days")), (self.Hours, _("hours")),

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                              (self.Minutes, _("minutes")), (self.Seconds, _("seconds")),

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                              (self.Milliseconds, _("milliseconds"))]:

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            try:

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                float(control.GetValue())

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            except ValueError:

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                errors.append(name)

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        if len(errors) > 0:

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            if len(errors) == 1:

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                message = _("Field %s hasn't a valid value!") % errors[0]

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            else:

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                message = _("Fields %s haven't a valid value!") % ",".join(errors)

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            dialog = wx.MessageDialog(self, message, _("Error"), wx.OK | wx.ICON_ERROR)

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            dialog.ShowModal()

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            dialog.Destroy()

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        else:

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            self.EndModal(wx.ID_OK)