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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) 2012: Edouard TISSERANT and Laurent BESSARD

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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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from __future__ import division

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from functools import reduce

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import numpy as np

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import wx

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import wx.lib.buttons

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# pylint: disable=wrong-import-position

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import matplotlib

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matplotlib.use('WX')   # noqa

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import matplotlib.pyplot

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from editors.DebugViewer import DebugViewer

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from util.BitmapLibrary import GetBitmap

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from controls.DebugVariablePanel.DebugVariableItem import DebugVariableItem

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from controls.DebugVariablePanel.DebugVariableTextViewer import DebugVariableTextViewer

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from controls.DebugVariablePanel.DebugVariableGraphicViewer import *

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from controls.DebugVariablePanel.RingBuffer import RingBuffer

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MILLISECOND = 1000000        # Number of nanosecond in a millisecond

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SECOND = 1000 * MILLISECOND  # Number of nanosecond in a second

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MINUTE = 60 * SECOND         # Number of nanosecond in a minute

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HOUR = 60 * MINUTE           # Number of nanosecond in a hour

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DAY = 24 * HOUR              # Number of nanosecond in a day

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# Scrollbar increment in pixel

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SCROLLBAR_UNIT = 10

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def compute_mask(x, y):

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    return [(xp if xp == yp else "*")

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            for xp, yp in zip(x, y)]

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def NextTick(variables):

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    next_tick = None

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    for _item, data in variables:

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        if len(data) == 0:

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            continue

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        next_tick = (data[0][0]

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                     if next_tick is None

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                     else min(next_tick, data[0][0]))

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    return next_tick

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

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#                    Debug Variable Graphic Panel Drop Target

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

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class DebugVariableDropTarget(wx.TextDropTarget):

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    """

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    Class that implements a custom drop target class for Debug Variable Graphic

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    Panel

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    """

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    def __init__(self, window):

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        """

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        Constructor

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        @param window: Reference to the Debug Variable Panel

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        """

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        wx.TextDropTarget.__init__(self)

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        self.ParentWindow = window

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    def __del__(self):

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        """

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        Destructor

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        """

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        # Remove reference to Debug Variable Panel

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        self.ParentWindow = None

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    def OnDragOver(self, x, y, d):

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        """

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        Function called when mouse is dragged over Drop Target

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        @param x: X coordinate of mouse pointer

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        @param y: Y coordinate of mouse pointer

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        @param d: Suggested default for return value

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        """

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        # Signal Debug Variable Panel to refresh highlight giving mouse position

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        self.ParentWindow.RefreshHighlight(x, y)

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        return wx.TextDropTarget.OnDragOver(self, x, y, d)

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    def OnDropText(self, x, y, data):

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        """

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        Function called when mouse is released in Drop Target

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        @param x: X coordinate of mouse pointer

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        @param y: Y coordinate of mouse pointer

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        @param data: Text associated to drag'n drop

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        """

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        # Signal Debug Variable Panel to reset highlight

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        self.ParentWindow.ResetHighlight()

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        message = None

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        # Check that data is valid regarding DebugVariablePanel

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        try:

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            values = eval(data)

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            if not isinstance(values, tuple):

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                raise ValueError

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        except Exception:

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            message = _("Invalid value \"%s\" for debug variable") % data

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            values = None

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        # Display message if data is invalid

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        if message is not None:

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            wx.CallAfter(self.ShowMessage, message)

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        # Data contain a reference to a variable to debug

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        elif values[1] == "debug":

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            # Drag'n Drop is an internal is an internal move inside Debug

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            # Variable Panel

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            if len(values) > 2 and values[2] == "move":

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                self.ParentWindow.MoveValue(values[0])

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            # Drag'n Drop was initiated by another control of Beremiz

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            else:

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                self.ParentWindow.InsertValue(values[0], force=True)

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    def OnLeave(self):

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        """

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        Function called when mouse is leave Drop Target

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        """

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        # Signal Debug Variable Panel to reset highlight

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        self.ParentWindow.ResetHighlight()

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        return wx.TextDropTarget.OnLeave(self)

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    def ShowMessage(self, message):

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        """

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        Show error message in Error Dialog

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        @param message: Error message to display

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        """

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        dialog = wx.MessageDialog(self.ParentWindow,

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                                  message,

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                                  _("Error"),

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                                  wx.OK | wx.ICON_ERROR)

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        dialog.ShowModal()

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        dialog.Destroy()

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class DebugVariablePanel(wx.Panel, DebugViewer):

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    """

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    Class that implements a Viewer that display variable values as a graphs

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    """

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    def __init__(self, parent, producer, window):

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        """

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        Constructor

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        @param parent: Reference to the parent wx.Window

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        @param producer: Object receiving debug value and dispatching them to

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        consumers

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        @param window: Reference to Beremiz frame

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        """

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        wx.Panel.__init__(self, parent, style=wx.SP_3D | wx.TAB_TRAVERSAL)

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        # List of values possible for graph range

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        # Format is [(time_in_plain_text, value_in_nanosecond),...]

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        self.RANGE_VALUES = [(_("%dms") % i, i * MILLISECOND) for i in (10, 20, 50, 100, 200, 500)] + \

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                            [(_("%ds") % i, i * SECOND) for i in (1, 2, 5, 10, 20, 30)] + \

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                            [(_("%dm") % i, i * MINUTE) for i in (1, 2, 5, 10, 20, 30)] + \

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                            [(_("%dh") % i, i * HOUR) for i in (1, 2, 3, 6, 12, 24)]

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        # Save Reference to Beremiz frame

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        self.ParentWindow = window

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        # Variable storing flag indicating that variable displayed in table

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        # received new value and then table need to be refreshed

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        self.HasNewData = False

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        # Variable storing flag indicating that refresh has been forced, and

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        # that next time refresh is possible, it will be done even if no new

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        # data is available

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        self.Force = False

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        self.SetBackgroundColour(wx.WHITE)

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        main_sizer = wx.BoxSizer(wx.VERTICAL)

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        self.Ticks = RingBuffer()  # List of tick received

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        self.StartTick = 0            # Tick starting range of data displayed

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        self.Fixed = False            # Flag that range of data is fixed

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        self.CursorTick = None        # Tick of cursor for displaying values

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        self.DraggingAxesPanel = None

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        self.DraggingAxesBoundingBox = None

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        self.DraggingAxesMousePos = None

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        self.VetoScrollEvent = False

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        self.VariableNameMask = []

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        self.GraphicPanels = []

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        graphics_button_sizer = wx.BoxSizer(wx.HORIZONTAL)

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        main_sizer.AddSizer(graphics_button_sizer, border=5, flag=wx.GROW | wx.ALL)

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        range_label = wx.StaticText(self, label=_('Range:'))

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        graphics_button_sizer.AddWindow(range_label, flag=wx.ALIGN_CENTER_VERTICAL)

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        self.CanvasRange = wx.ComboBox(self, style=wx.CB_READONLY)

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        self.Bind(wx.EVT_COMBOBOX, self.OnRangeChanged, self.CanvasRange)

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        graphics_button_sizer.AddWindow(self.CanvasRange, 1,

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                                        border=5,

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                                        flag=wx.LEFT | wx.ALIGN_CENTER_VERTICAL)

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        self.CanvasRange.Clear()

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        default_range_idx = 0

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        for idx, (text, _value) in enumerate(self.RANGE_VALUES):

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            self.CanvasRange.Append(text)

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            if _value == 1000000000:

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                default_range_idx = idx

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        self.CanvasRange.SetSelection(default_range_idx)

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        for name, bitmap, help in [

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                ("CurrentButton",     "current",      _("Go to current value")),

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                ("ExportGraphButton", "export_graph", _("Export graph values to clipboard"))]:

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            button = wx.lib.buttons.GenBitmapButton(

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                self, bitmap=GetBitmap(bitmap),

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                size=wx.Size(28, 28), style=wx.NO_BORDER)

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            button.SetToolTipString(help)

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            setattr(self, name, button)

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            self.Bind(wx.EVT_BUTTON, getattr(self, "On" + name), button)

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            graphics_button_sizer.AddWindow(button, border=5, flag=wx.LEFT)

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        self.CanvasPosition = wx.ScrollBar(

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            self, size=wx.Size(0, 16), style=wx.SB_HORIZONTAL)

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        self.CanvasPosition.Bind(wx.EVT_SCROLL_THUMBTRACK,

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                                 self.OnPositionChanging, self.CanvasPosition)

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        self.CanvasPosition.Bind(wx.EVT_SCROLL_LINEUP,

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                                 self.OnPositionChanging, self.CanvasPosition)

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        self.CanvasPosition.Bind(wx.EVT_SCROLL_LINEDOWN,

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                                 self.OnPositionChanging, self.CanvasPosition)

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        self.CanvasPosition.Bind(wx.EVT_SCROLL_PAGEUP,

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                                 self.OnPositionChanging, self.CanvasPosition)

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        self.CanvasPosition.Bind(wx.EVT_SCROLL_PAGEDOWN,

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                                 self.OnPositionChanging, self.CanvasPosition)

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        main_sizer.AddWindow(self.CanvasPosition, border=5, flag=wx.GROW | wx.LEFT | wx.RIGHT | wx.BOTTOM)

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        self.TickSizer = wx.BoxSizer(wx.HORIZONTAL)

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        main_sizer.AddSizer(self.TickSizer, border=5, flag=wx.ALL | wx.GROW)

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        self.TickLabel = wx.StaticText(self)

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        self.TickSizer.AddWindow(self.TickLabel, border=5, flag=wx.RIGHT)

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        self.MaskLabel = wx.TextCtrl(self, style=wx.TE_READONLY | wx.TE_CENTER | wx.NO_BORDER)

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        self.TickSizer.AddWindow(self.MaskLabel, 1, border=5, flag=wx.RIGHT | wx.GROW)

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        self.TickTimeLabel = wx.StaticText(self)

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        self.TickSizer.AddWindow(self.TickTimeLabel)

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        self.GraphicsWindow = wx.ScrolledWindow(self, style=wx.HSCROLL | wx.VSCROLL)

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        self.GraphicsWindow.SetBackgroundColour(wx.WHITE)

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        self.GraphicsWindow.SetDropTarget(DebugVariableDropTarget(self))

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        self.GraphicsWindow.Bind(wx.EVT_PAINT, self.OnGraphicsWindowPaint)

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        self.GraphicsWindow.Bind(wx.EVT_SIZE, self.OnGraphicsWindowResize)

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        self.GraphicsWindow.Bind(wx.EVT_MOUSEWHEEL, self.OnGraphicsWindowMouseWheel)

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        main_sizer.AddWindow(self.GraphicsWindow, 1, flag=wx.GROW)

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        self.GraphicsSizer = wx.BoxSizer(wx.VERTICAL)

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        self.GraphicsWindow.SetSizer(self.GraphicsSizer)

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        DebugViewer.__init__(self, producer, True)

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        self.SetSizer(main_sizer)

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        self.SetTickTime()

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    def SetTickTime(self, ticktime=0):

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        """

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        Set Ticktime for calculate data range according to time range selected

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        @param ticktime: Ticktime to apply to range (default: 0)

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        """

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        # Save ticktime

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        self.Ticktime = ticktime

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        # Set ticktime to millisecond if undefined

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        if self.Ticktime == 0:

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            self.Ticktime = MILLISECOND

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   309

        # Calculate range to apply to data

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        self.CurrentRange = self.RANGE_VALUES[

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            self.CanvasRange.GetSelection()][1] // self.Ticktime

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    def SetDataProducer(self, producer):

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        """

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        Set Data Producer

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        @param producer: Data Producer

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        """

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        DebugViewer.SetDataProducer(self, producer)

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        # Set ticktime if data producer is available

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        if self.DataProducer is not None:

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            self.SetTickTime(self.DataProducer.GetTicktime())

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    def RefreshNewData(self):

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        """

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        Called to refresh Panel according to values received by variables

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        Can receive any parameters (not used here)

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        """

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        # Refresh graphs if new data is available or refresh is forced

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        if self.HasNewData or self.Force:

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            self.HasNewData = False

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            self.RefreshView()

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   334

        DebugViewer.RefreshNewData(self)

   335

   336

    def NewDataAvailable(self, ticks):

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        """

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        Called by DataProducer for each tick captured or by panel to refresh

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        graphs

   340

        @param tick: PLC tick captured

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        All other parameters are passed to refresh function

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        """

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        # If tick given

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        if ticks is not None:

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            tick = ticks[-1]

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            # Save tick as start tick for range if data is still empty

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            if self.Ticks.count == 0:

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                self.StartTick = ticks[0]

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            # Add tick to list of ticks received

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            self.Ticks.append(ticks)

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            # Update start tick for range if range follow ticks received

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            if not self.Fixed or tick < self.StartTick + self.CurrentRange:

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                self.StartTick = max(self.StartTick, tick - self.CurrentRange)

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            # Force refresh if graph is fixed because range of data received

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            # is too small to fill data range selected

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   368

            self.HasNewData = False

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            self.RefreshView()

   370

   371

        else:

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            DebugViewer.NewDataAvailable(self, ticks)

   373

   374

    def ForceRefresh(self):

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        """

   376

        Called to force refresh of graphs

   377

        """

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        self.Force = True

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        wx.CallAfter(self.NewDataAvailable, None)

   380

   381

    def SetCursorTick(self, cursor_tick):

   382

        """

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        Set Cursor for displaying values of items at a tick given

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        @param cursor_tick: Tick of cursor

   385

        """

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        # Save cursor tick

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        self.CursorTick = cursor_tick

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        self.Fixed = cursor_tick is not None

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        self.UpdateCursorTick()

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    def MoveCursorTick(self, move):

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        if self.CursorTick is not None:

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            cursor_tick = max(self.Ticks.view[0],

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                              min(self.CursorTick + move, self.Ticks.view[-1]))

   396

            if self.Ticks.view[cursor_tick_idx] == self.CursorTick:

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                cursor_tick_idx = max(0,

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                                      min(cursor_tick_idx + abs(move) // move,

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                                          self.Ticks.count - 1))

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            self.CursorTick = self.Ticks.view[cursor_tick_idx]

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            self.StartTick = max(

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                min(self.StartTick, self.CursorTick))

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            self.RefreshCanvasPosition()

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            self.UpdateCursorTick()

   406

   407

    def ResetCursorTick(self):

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        self.CursorTick = None

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        self.Fixed = False

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        self.UpdateCursorTick()

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   412

    def UpdateCursorTick(self):

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        for panel in self.GraphicPanels:

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            if isinstance(panel, DebugVariableGraphicViewer):

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                panel.SetCursorTick(self.CursorTick)

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        self.ForceRefresh()

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    def StartDragNDrop(self, panel, item, x_mouse, y_mouse, x_mouse_start, y_mouse_start):

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        if len(panel.GetItems()) > 1:

   420

            self.DraggingAxesPanel = DebugVariableGraphicViewer(self.GraphicsWindow, self, [item], GRAPH_PARALLEL)

   421

            self.DraggingAxesPanel.SetCursorTick(self.CursorTick)

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            width, height = panel.GetSize()

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            self.DraggingAxesPanel.SetSize(wx.Size(width, height))

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            self.DraggingAxesPanel.ResetGraphics()

   425

            self.DraggingAxesPanel.SetPosition(wx.Point(0, -height))

   426

        else:

   427

            self.DraggingAxesPanel = panel

   428

        self.DraggingAxesBoundingBox = panel.GetAxesBoundingBox(parent_coordinate=True)

   429

        self.DraggingAxesMousePos = wx.Point(

   430

            x_mouse_start - self.DraggingAxesBoundingBox.x,

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            y_mouse_start - self.DraggingAxesBoundingBox.y)

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        self.MoveDragNDrop(x_mouse, y_mouse)

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   434

    def MoveDragNDrop(self, x_mouse, y_mouse):

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        self.DraggingAxesBoundingBox.x = x_mouse - self.DraggingAxesMousePos.x

   436

        self.DraggingAxesBoundingBox.y = y_mouse - self.DraggingAxesMousePos.y

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        self.RefreshHighlight(x_mouse, y_mouse)

   438

   439

    def RefreshHighlight(self, x_mouse, y_mouse):

   440

        for idx, panel in enumerate(self.GraphicPanels):

   441

            x, y = panel.GetPosition()

   442

            width, height = panel.GetSize()

   443

            rect = wx.Rect(x, y, width, height)

   444

            if rect.InsideXY(x_mouse, y_mouse) or \

   445

               idx == 0 and y_mouse < 0 or \

   446

               idx == len(self.GraphicPanels) - 1 and y_mouse > panel.GetPosition()[1]:

   447

                panel.RefreshHighlight(x_mouse - x, y_mouse - y)

   448

            else:

   449

                panel.SetHighlight(HIGHLIGHT_NONE)

   450

        if wx.Platform == "__WXMSW__":

   451

            self.RefreshView()

   452

        else:

   453

            self.ForceRefresh()

   454

   455

    def ResetHighlight(self):

   456

        for panel in self.GraphicPanels:

   457

            panel.SetHighlight(HIGHLIGHT_NONE)

   458

        if wx.Platform == "__WXMSW__":

   459

            self.RefreshView()

   460

        else:

   461

            self.ForceRefresh()

   462

   463

    def IsDragging(self):

   464

        return self.DraggingAxesPanel is not None

   465

   466

    def GetDraggingAxesClippingRegion(self, panel):

   467

        x, y = panel.GetPosition()

   468

        width, height = panel.GetSize()

   469

        bbox = wx.Rect(x, y, width, height)

   470

        bbox = bbox.Intersect(self.DraggingAxesBoundingBox)

   471

        bbox.x -= x

   472

        bbox.y -= y

   473

        return bbox

   474

   475

    def GetDraggingAxesPosition(self, panel):

   476

        x, y = panel.GetPosition()

   477

        return wx.Point(self.DraggingAxesBoundingBox.x - x,

   478

                        self.DraggingAxesBoundingBox.y - y)

   479